4397 lines
115 KiB
C
4397 lines
115 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* tiny vi.c: A small 'vi' clone
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* Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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//
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//Things To Do:
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// EXINIT
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// $HOME/.exrc and ./.exrc
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// add magic to search /foo.*bar
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// add :help command
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// :map macros
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// if mark[] values were line numbers rather than pointers
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// it would be easier to change the mark when add/delete lines
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// More intelligence in refresh()
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// ":r !cmd" and "!cmd" to filter text through an external command
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// An "ex" line oriented mode- maybe using "cmdedit"
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//config:config VI
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//config: bool "vi (23 kb)"
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//config: default y
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//config: help
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//config: 'vi' is a text editor. More specifically, it is the One True
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//config: text editor <grin>. It does, however, have a rather steep
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//config: learning curve. If you are not already comfortable with 'vi'
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//config: you may wish to use something else.
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//config:
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//config:config FEATURE_VI_MAX_LEN
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//config: int "Maximum screen width"
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//config: range 256 16384
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//config: default 4096
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//config: depends on VI
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//config: help
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//config: Contrary to what you may think, this is not eating much.
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//config: Make it smaller than 4k only if you are very limited on memory.
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//config:
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//config:config FEATURE_VI_8BIT
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//config: bool "Allow to display 8-bit chars (otherwise shows dots)"
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//config: default n
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//config: depends on VI
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//config: help
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//config: If your terminal can display characters with high bit set,
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//config: you may want to enable this. Note: vi is not Unicode-capable.
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//config: If your terminal combines several 8-bit bytes into one character
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//config: (as in Unicode mode), this will not work properly.
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//config:
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//config:config FEATURE_VI_COLON
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//config: bool "Enable \":\" colon commands (no \"ex\" mode)"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Enable a limited set of colon commands. This does not
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//config: provide an "ex" mode.
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//config:
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//config:config FEATURE_VI_YANKMARK
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//config: bool "Enable yank/put commands and mark cmds"
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//config: default y
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//config: depends on VI
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//config: help
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//config: This enables you to use yank and put, as well as mark.
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//config:
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//config:config FEATURE_VI_SEARCH
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//config: bool "Enable search and replace cmds"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Select this if you wish to be able to do search and replace.
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//config:
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//config:config FEATURE_VI_REGEX_SEARCH
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//config: bool "Enable regex in search and replace"
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//config: default n # Uses GNU regex, which may be unavailable. FIXME
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//config: depends on FEATURE_VI_SEARCH
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//config: help
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//config: Use extended regex search.
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//config:
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//config:config FEATURE_VI_USE_SIGNALS
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//config: bool "Catch signals"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Selecting this option will make vi signal aware. This will support
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//config: SIGWINCH to deal with Window Changes, catch ^Z and ^C and alarms.
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//config:
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//config:config FEATURE_VI_DOT_CMD
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//config: bool "Remember previous cmd and \".\" cmd"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Make vi remember the last command and be able to repeat it.
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//config:
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//config:config FEATURE_VI_READONLY
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//config: bool "Enable -R option and \"view\" mode"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Enable the read-only command line option, which allows the user to
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//config: open a file in read-only mode.
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//config:
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//config:config FEATURE_VI_SETOPTS
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//config: bool "Enable settable options, ai ic showmatch"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Enable the editor to set some (ai, ic, showmatch) options.
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//config:
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//config:config FEATURE_VI_SET
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//config: bool "Support :set"
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//config: default y
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//config: depends on VI
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//config:
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//config:config FEATURE_VI_WIN_RESIZE
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//config: bool "Handle window resize"
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//config: default y
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//config: depends on VI
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//config: help
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//config: Behave nicely with terminals that get resized.
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//config:
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//config:config FEATURE_VI_ASK_TERMINAL
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//config: bool "Use 'tell me cursor position' ESC sequence to measure window"
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//config: default y
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//config: depends on VI
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//config: help
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//config: If terminal size can't be retrieved and $LINES/$COLUMNS are not set,
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//config: this option makes vi perform a last-ditch effort to find it:
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//config: position cursor to 999,999 and ask terminal to report real
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//config: cursor position using "ESC [ 6 n" escape sequence, then read stdin.
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//config: This is not clean but helps a lot on serial lines and such.
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//config:
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//config:config FEATURE_VI_UNDO
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//config: bool "Support undo command \"u\""
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//config: default y
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//config: depends on VI
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//config: help
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//config: Support the 'u' command to undo insertion, deletion, and replacement
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//config: of text.
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//config:
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//config:config FEATURE_VI_UNDO_QUEUE
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//config: bool "Enable undo operation queuing"
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//config: default y
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//config: depends on FEATURE_VI_UNDO
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//config: help
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//config: The vi undo functions can use an intermediate queue to greatly lower
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//config: malloc() calls and overhead. When the maximum size of this queue is
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//config: reached, the contents of the queue are committed to the undo stack.
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//config: This increases the size of the undo code and allows some undo
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//config: operations (especially un-typing/backspacing) to be far more useful.
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//config:
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//config:config FEATURE_VI_UNDO_QUEUE_MAX
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//config: int "Maximum undo character queue size"
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//config: default 256
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//config: range 32 65536
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//config: depends on FEATURE_VI_UNDO_QUEUE
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//config: help
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//config: This option sets the number of bytes used at runtime for the queue.
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//config: Smaller values will create more undo objects and reduce the amount
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//config: of typed or backspaced characters that are grouped into one undo
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//config: operation; larger values increase the potential size of each undo
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//config: and will generally malloc() larger objects and less frequently.
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//config: Unless you want more (or less) frequent "undo points" while typing,
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//config: you should probably leave this unchanged.
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//applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_VI) += vi.o
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//usage:#define vi_trivial_usage
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//usage: "[OPTIONS] [FILE]..."
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//usage:#define vi_full_usage "\n\n"
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//usage: "Edit FILE\n"
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//usage: IF_FEATURE_VI_COLON(
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//usage: "\n -c CMD Initial command to run ($EXINIT also available)"
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//usage: )
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//usage: IF_FEATURE_VI_READONLY(
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//usage: "\n -R Read-only"
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//usage: )
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//usage: "\n -H List available features"
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#include "libbb.h"
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// Should be after libbb.h: on some systems regex.h needs sys/types.h:
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#if ENABLE_FEATURE_VI_REGEX_SEARCH
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# include <regex.h>
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#endif
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// the CRASHME code is unmaintained, and doesn't currently build
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#define ENABLE_FEATURE_VI_CRASHME 0
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#if ENABLE_LOCALE_SUPPORT
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#if ENABLE_FEATURE_VI_8BIT
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//FIXME: this does not work properly for Unicode anyway
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# define Isprint(c) (isprint)(c)
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#else
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# define Isprint(c) isprint_asciionly(c)
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#endif
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#else
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// 0x9b is Meta-ESC
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#if ENABLE_FEATURE_VI_8BIT
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# define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
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#else
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# define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
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#endif
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#endif
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enum {
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MAX_TABSTOP = 32, // sanity limit
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// User input len. Need not be extra big.
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// Lines in file being edited *can* be bigger than this.
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MAX_INPUT_LEN = 128,
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// Sanity limits. We have only one buffer of this size.
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MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
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MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
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};
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// VT102 ESC sequences.
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// See "Xterm Control Sequences"
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// http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
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#define ESC "\033"
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// Inverse/Normal text
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#define ESC_BOLD_TEXT ESC"[7m"
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#define ESC_NORM_TEXT ESC"[m"
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// Bell
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#define ESC_BELL "\007"
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// Clear-to-end-of-line
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#define ESC_CLEAR2EOL ESC"[K"
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// Clear-to-end-of-screen.
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// (We use default param here.
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// Full sequence is "ESC [ <num> J",
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// <num> is 0/1/2 = "erase below/above/all".)
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#define ESC_CLEAR2EOS ESC"[J"
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// Cursor to given coordinate (1,1: top left)
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#define ESC_SET_CURSOR_POS ESC"[%u;%uH"
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#define ESC_SET_CURSOR_TOPLEFT ESC"[H"
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//UNUSED
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//// Cursor up and down
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//#define ESC_CURSOR_UP ESC"[A"
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//#define ESC_CURSOR_DOWN "\n"
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#if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
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// cmds modifying text[]
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static const char modifying_cmds[] ALIGN1 = "aAcCdDiIJoOpPrRs""xX<>~";
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#endif
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enum {
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YANKONLY = FALSE,
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YANKDEL = TRUE,
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FORWARD = 1, // code depends on "1" for array index
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BACK = -1, // code depends on "-1" for array index
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LIMITED = 0, // char_search() only current line
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FULL = 1, // char_search() to the end/beginning of entire text
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S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
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S_TO_WS = 2, // used in skip_thing() for moving "dot"
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S_OVER_WS = 3, // used in skip_thing() for moving "dot"
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S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
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S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
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};
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// vi.c expects chars to be unsigned.
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// busybox build system provides that, but it's better
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// to audit and fix the source
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struct globals {
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// many references - keep near the top of globals
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char *text, *end; // pointers to the user data in memory
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char *dot; // where all the action takes place
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int text_size; // size of the allocated buffer
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// the rest
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smallint vi_setops;
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#define VI_AUTOINDENT 1
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#define VI_SHOWMATCH 2
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#define VI_IGNORECASE 4
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#define VI_ERR_METHOD 8
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#define autoindent (vi_setops & VI_AUTOINDENT)
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#define showmatch (vi_setops & VI_SHOWMATCH )
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#define ignorecase (vi_setops & VI_IGNORECASE)
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// indicate error with beep or flash
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#define err_method (vi_setops & VI_ERR_METHOD)
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#if ENABLE_FEATURE_VI_READONLY
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smallint readonly_mode;
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#define SET_READONLY_FILE(flags) ((flags) |= 0x01)
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#define SET_READONLY_MODE(flags) ((flags) |= 0x02)
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#define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
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#else
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#define SET_READONLY_FILE(flags) ((void)0)
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#define SET_READONLY_MODE(flags) ((void)0)
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#define UNSET_READONLY_FILE(flags) ((void)0)
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#endif
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smallint editing; // >0 while we are editing a file
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// [code audit says "can be 0, 1 or 2 only"]
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smallint cmd_mode; // 0=command 1=insert 2=replace
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int modified_count; // buffer contents changed if !0
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int last_modified_count; // = -1;
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int cmdline_filecnt; // how many file names on cmd line
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int cmdcnt; // repetition count
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unsigned rows, columns; // the terminal screen is this size
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#if ENABLE_FEATURE_VI_ASK_TERMINAL
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int get_rowcol_error;
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#endif
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int crow, ccol; // cursor is on Crow x Ccol
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int offset; // chars scrolled off the screen to the left
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int have_status_msg; // is default edit status needed?
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// [don't make smallint!]
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int last_status_cksum; // hash of current status line
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char *current_filename;
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char *screenbegin; // index into text[], of top line on the screen
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char *screen; // pointer to the virtual screen buffer
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int screensize; // and its size
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int tabstop;
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int last_forward_char; // last char searched for with 'f' (int because of Unicode)
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#if ENABLE_FEATURE_VI_CRASHME
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char last_input_char; // last char read from user
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#endif
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#if ENABLE_FEATURE_VI_DOT_CMD
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smallint adding2q; // are we currently adding user input to q
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int lmc_len; // length of last_modifying_cmd
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char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
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#endif
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#if ENABLE_FEATURE_VI_SEARCH
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char *last_search_pattern; // last pattern from a '/' or '?' search
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#endif
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// former statics
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#if ENABLE_FEATURE_VI_YANKMARK
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char *edit_file__cur_line;
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#endif
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int refresh__old_offset;
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int format_edit_status__tot;
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// a few references only
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#if ENABLE_FEATURE_VI_YANKMARK
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smalluint YDreg;//,Ureg;// default delete register and orig line for "U"
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#define Ureg 27
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char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
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char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
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char *context_start, *context_end;
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#endif
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#if ENABLE_FEATURE_VI_USE_SIGNALS
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sigjmp_buf restart; // int_handler() jumps to location remembered here
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#endif
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struct termios term_orig; // remember what the cooked mode was
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#if ENABLE_FEATURE_VI_COLON
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char *initial_cmds[3]; // currently 2 entries, NULL terminated
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#endif
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// Should be just enough to hold a key sequence,
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// but CRASHME mode uses it as generated command buffer too
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#if ENABLE_FEATURE_VI_CRASHME
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char readbuffer[128];
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#else
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char readbuffer[KEYCODE_BUFFER_SIZE];
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#endif
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#define STATUS_BUFFER_LEN 200
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char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
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#if ENABLE_FEATURE_VI_DOT_CMD
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char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
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#endif
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char get_input_line__buf[MAX_INPUT_LEN]; // former static
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char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
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#if ENABLE_FEATURE_VI_UNDO
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// undo_push() operations
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#define UNDO_INS 0
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#define UNDO_DEL 1
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#define UNDO_INS_CHAIN 2
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#define UNDO_DEL_CHAIN 3
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// UNDO_*_QUEUED must be equal to UNDO_xxx ORed with UNDO_QUEUED_FLAG
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#define UNDO_QUEUED_FLAG 4
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#define UNDO_INS_QUEUED 4
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#define UNDO_DEL_QUEUED 5
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#define UNDO_USE_SPOS 32
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#define UNDO_EMPTY 64
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// Pass-through flags for functions that can be undone
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#define NO_UNDO 0
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#define ALLOW_UNDO 1
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#define ALLOW_UNDO_CHAIN 2
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# if ENABLE_FEATURE_VI_UNDO_QUEUE
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#define ALLOW_UNDO_QUEUED 3
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char undo_queue_state;
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int undo_q;
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char *undo_queue_spos; // Start position of queued operation
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char undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX];
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# else
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// If undo queuing disabled, don't invoke the missing queue logic
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#define ALLOW_UNDO_QUEUED 1
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# endif
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struct undo_object {
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struct undo_object *prev; // Linking back avoids list traversal (LIFO)
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int start; // Offset where the data should be restored/deleted
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int length; // total data size
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uint8_t u_type; // 0=deleted, 1=inserted, 2=swapped
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char undo_text[1]; // text that was deleted (if deletion)
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} *undo_stack_tail;
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#endif /* ENABLE_FEATURE_VI_UNDO */
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};
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#define G (*ptr_to_globals)
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#define text (G.text )
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#define text_size (G.text_size )
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#define end (G.end )
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#define dot (G.dot )
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#define reg (G.reg )
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#define vi_setops (G.vi_setops )
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#define editing (G.editing )
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#define cmd_mode (G.cmd_mode )
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#define modified_count (G.modified_count )
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#define last_modified_count (G.last_modified_count)
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#define cmdline_filecnt (G.cmdline_filecnt )
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#define cmdcnt (G.cmdcnt )
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#define rows (G.rows )
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#define columns (G.columns )
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#define crow (G.crow )
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#define ccol (G.ccol )
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#define offset (G.offset )
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#define status_buffer (G.status_buffer )
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#define have_status_msg (G.have_status_msg )
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#define last_status_cksum (G.last_status_cksum )
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#define current_filename (G.current_filename )
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#define screen (G.screen )
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#define screensize (G.screensize )
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#define screenbegin (G.screenbegin )
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#define tabstop (G.tabstop )
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#define last_forward_char (G.last_forward_char )
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#if ENABLE_FEATURE_VI_CRASHME
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#define last_input_char (G.last_input_char )
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#endif
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#if ENABLE_FEATURE_VI_READONLY
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#define readonly_mode (G.readonly_mode )
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#else
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#define readonly_mode 0
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#endif
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#define adding2q (G.adding2q )
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#define lmc_len (G.lmc_len )
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#define ioq (G.ioq )
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#define ioq_start (G.ioq_start )
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#define last_search_pattern (G.last_search_pattern)
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#define edit_file__cur_line (G.edit_file__cur_line)
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#define refresh__old_offset (G.refresh__old_offset)
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#define format_edit_status__tot (G.format_edit_status__tot)
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#define YDreg (G.YDreg )
|
|
//#define Ureg (G.Ureg )
|
|
#define mark (G.mark )
|
|
#define context_start (G.context_start )
|
|
#define context_end (G.context_end )
|
|
#define restart (G.restart )
|
|
#define term_orig (G.term_orig )
|
|
#define initial_cmds (G.initial_cmds )
|
|
#define readbuffer (G.readbuffer )
|
|
#define scr_out_buf (G.scr_out_buf )
|
|
#define last_modifying_cmd (G.last_modifying_cmd )
|
|
#define get_input_line__buf (G.get_input_line__buf)
|
|
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
#define undo_stack_tail (G.undo_stack_tail )
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
#define undo_queue_state (G.undo_queue_state)
|
|
#define undo_q (G.undo_q )
|
|
#define undo_queue (G.undo_queue )
|
|
#define undo_queue_spos (G.undo_queue_spos )
|
|
# endif
|
|
#endif
|
|
|
|
#define INIT_G() do { \
|
|
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
|
last_modified_count = -1; \
|
|
/* "" but has space for 2 chars: */ \
|
|
IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \
|
|
} while (0)
|
|
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
static int crashme = 0;
|
|
#endif
|
|
|
|
static void show_status_line(void); // put a message on the bottom line
|
|
static void status_line_bold(const char *, ...);
|
|
|
|
static void show_help(void)
|
|
{
|
|
puts("These features are available:"
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
"\n\tPattern searches with / and ?"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
"\n\tLast command repeat with ."
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
"\n\tLine marking with 'x"
|
|
"\n\tNamed buffers with \"x"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
//not implemented: "\n\tReadonly if vi is called as \"view\""
|
|
//redundant: usage text says this too: "\n\tReadonly with -R command line arg"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SET
|
|
"\n\tSome colon mode commands with :"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
"\n\tSettable options with \":set\""
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
"\n\tSignal catching- ^C"
|
|
"\n\tJob suspend and resume with ^Z"
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_WIN_RESIZE
|
|
"\n\tAdapt to window re-sizes"
|
|
#endif
|
|
);
|
|
}
|
|
|
|
static void write1(const char *out)
|
|
{
|
|
fputs(out, stdout);
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_WIN_RESIZE
|
|
static int query_screen_dimensions(void)
|
|
{
|
|
int err = get_terminal_width_height(STDIN_FILENO, &columns, &rows);
|
|
if (rows > MAX_SCR_ROWS)
|
|
rows = MAX_SCR_ROWS;
|
|
if (columns > MAX_SCR_COLS)
|
|
columns = MAX_SCR_COLS;
|
|
return err;
|
|
}
|
|
#else
|
|
static ALWAYS_INLINE int query_screen_dimensions(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
// sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
|
|
static int mysleep(int hund)
|
|
{
|
|
struct pollfd pfd[1];
|
|
|
|
if (hund != 0)
|
|
fflush_all();
|
|
|
|
pfd[0].fd = STDIN_FILENO;
|
|
pfd[0].events = POLLIN;
|
|
return safe_poll(pfd, 1, hund*10) > 0;
|
|
}
|
|
|
|
//----- Set terminal attributes --------------------------------
|
|
static void rawmode(void)
|
|
{
|
|
// no TERMIOS_CLEAR_ISIG: leave ISIG on - allow signals
|
|
set_termios_to_raw(STDIN_FILENO, &term_orig, TERMIOS_RAW_CRNL);
|
|
}
|
|
|
|
static void cookmode(void)
|
|
{
|
|
fflush_all();
|
|
tcsetattr_stdin_TCSANOW(&term_orig);
|
|
}
|
|
|
|
//----- Terminal Drawing ---------------------------------------
|
|
// The terminal is made up of 'rows' line of 'columns' columns.
|
|
// classically this would be 24 x 80.
|
|
// screen coordinates
|
|
// 0,0 ... 0,79
|
|
// 1,0 ... 1,79
|
|
// . ... .
|
|
// . ... .
|
|
// 22,0 ... 22,79
|
|
// 23,0 ... 23,79 <- status line
|
|
|
|
//----- Move the cursor to row x col (count from 0, not 1) -------
|
|
static void place_cursor(int row, int col)
|
|
{
|
|
char cm1[sizeof(ESC_SET_CURSOR_POS) + sizeof(int)*3 * 2];
|
|
|
|
if (row < 0) row = 0;
|
|
if (row >= rows) row = rows - 1;
|
|
if (col < 0) col = 0;
|
|
if (col >= columns) col = columns - 1;
|
|
|
|
sprintf(cm1, ESC_SET_CURSOR_POS, row + 1, col + 1);
|
|
write1(cm1);
|
|
}
|
|
|
|
//----- Erase from cursor to end of line -----------------------
|
|
static void clear_to_eol(void)
|
|
{
|
|
write1(ESC_CLEAR2EOL);
|
|
}
|
|
|
|
static void go_bottom_and_clear_to_eol(void)
|
|
{
|
|
place_cursor(rows - 1, 0);
|
|
clear_to_eol();
|
|
}
|
|
|
|
//----- Start standout mode ------------------------------------
|
|
static void standout_start(void)
|
|
{
|
|
write1(ESC_BOLD_TEXT);
|
|
}
|
|
|
|
//----- End standout mode --------------------------------------
|
|
static void standout_end(void)
|
|
{
|
|
write1(ESC_NORM_TEXT);
|
|
}
|
|
|
|
//----- Text Movement Routines ---------------------------------
|
|
static char *begin_line(char *p) // return pointer to first char cur line
|
|
{
|
|
if (p > text) {
|
|
p = memrchr(text, '\n', p - text);
|
|
if (!p)
|
|
return text;
|
|
return p + 1;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static char *end_line(char *p) // return pointer to NL of cur line
|
|
{
|
|
if (p < end - 1) {
|
|
p = memchr(p, '\n', end - p - 1);
|
|
if (!p)
|
|
return end - 1;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static char *dollar_line(char *p) // return pointer to just before NL line
|
|
{
|
|
p = end_line(p);
|
|
// Try to stay off of the Newline
|
|
if (*p == '\n' && (p - begin_line(p)) > 0)
|
|
p--;
|
|
return p;
|
|
}
|
|
|
|
static char *prev_line(char *p) // return pointer first char prev line
|
|
{
|
|
p = begin_line(p); // goto beginning of cur line
|
|
if (p > text && p[-1] == '\n')
|
|
p--; // step to prev line
|
|
p = begin_line(p); // goto beginning of prev line
|
|
return p;
|
|
}
|
|
|
|
static char *next_line(char *p) // return pointer first char next line
|
|
{
|
|
p = end_line(p);
|
|
if (p < end - 1 && *p == '\n')
|
|
p++; // step to next line
|
|
return p;
|
|
}
|
|
|
|
//----- Text Information Routines ------------------------------
|
|
static char *end_screen(void)
|
|
{
|
|
char *q;
|
|
int cnt;
|
|
|
|
// find new bottom line
|
|
q = screenbegin;
|
|
for (cnt = 0; cnt < rows - 2; cnt++)
|
|
q = next_line(q);
|
|
q = end_line(q);
|
|
return q;
|
|
}
|
|
|
|
// count line from start to stop
|
|
static int count_lines(char *start, char *stop)
|
|
{
|
|
char *q;
|
|
int cnt;
|
|
|
|
if (stop < start) { // start and stop are backwards- reverse them
|
|
q = start;
|
|
start = stop;
|
|
stop = q;
|
|
}
|
|
cnt = 0;
|
|
stop = end_line(stop);
|
|
while (start <= stop && start <= end - 1) {
|
|
start = end_line(start);
|
|
if (*start == '\n')
|
|
cnt++;
|
|
start++;
|
|
}
|
|
return cnt;
|
|
}
|
|
|
|
static char *find_line(int li) // find beginning of line #li
|
|
{
|
|
char *q;
|
|
|
|
for (q = text; li > 1; li--) {
|
|
q = next_line(q);
|
|
}
|
|
return q;
|
|
}
|
|
|
|
static int next_tabstop(int col)
|
|
{
|
|
return col + ((tabstop - 1) - (col % tabstop));
|
|
}
|
|
|
|
//----- Erase the Screen[] memory ------------------------------
|
|
static void screen_erase(void)
|
|
{
|
|
memset(screen, ' ', screensize); // clear new screen
|
|
}
|
|
|
|
static void new_screen(int ro, int co)
|
|
{
|
|
char *s;
|
|
|
|
free(screen);
|
|
screensize = ro * co + 8;
|
|
s = screen = xmalloc(screensize);
|
|
// initialize the new screen. assume this will be a empty file.
|
|
screen_erase();
|
|
// non-existent text[] lines start with a tilde (~).
|
|
//screen[(1 * co) + 0] = '~';
|
|
//screen[(2 * co) + 0] = '~';
|
|
//..
|
|
//screen[((ro-2) * co) + 0] = '~';
|
|
ro -= 2;
|
|
while (--ro >= 0) {
|
|
s += co;
|
|
*s = '~';
|
|
}
|
|
}
|
|
|
|
//----- Synchronize the cursor to Dot --------------------------
|
|
static NOINLINE void sync_cursor(char *d, int *row, int *col)
|
|
{
|
|
char *beg_cur; // begin and end of "d" line
|
|
char *tp;
|
|
int cnt, ro, co;
|
|
|
|
beg_cur = begin_line(d); // first char of cur line
|
|
|
|
if (beg_cur < screenbegin) {
|
|
// "d" is before top line on screen
|
|
// how many lines do we have to move
|
|
cnt = count_lines(beg_cur, screenbegin);
|
|
sc1:
|
|
screenbegin = beg_cur;
|
|
if (cnt > (rows - 1) / 2) {
|
|
// we moved too many lines. put "dot" in middle of screen
|
|
for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
|
|
screenbegin = prev_line(screenbegin);
|
|
}
|
|
}
|
|
} else {
|
|
char *end_scr; // begin and end of screen
|
|
end_scr = end_screen(); // last char of screen
|
|
if (beg_cur > end_scr) {
|
|
// "d" is after bottom line on screen
|
|
// how many lines do we have to move
|
|
cnt = count_lines(end_scr, beg_cur);
|
|
if (cnt > (rows - 1) / 2)
|
|
goto sc1; // too many lines
|
|
for (ro = 0; ro < cnt - 1; ro++) {
|
|
// move screen begin the same amount
|
|
screenbegin = next_line(screenbegin);
|
|
// now, move the end of screen
|
|
end_scr = next_line(end_scr);
|
|
end_scr = end_line(end_scr);
|
|
}
|
|
}
|
|
}
|
|
// "d" is on screen- find out which row
|
|
tp = screenbegin;
|
|
for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
|
|
if (tp == beg_cur)
|
|
break;
|
|
tp = next_line(tp);
|
|
}
|
|
|
|
// find out what col "d" is on
|
|
co = 0;
|
|
while (tp < d) { // drive "co" to correct column
|
|
if (*tp == '\n') //vda || *tp == '\0')
|
|
break;
|
|
if (*tp == '\t') {
|
|
// handle tabs like real vi
|
|
if (d == tp && cmd_mode) {
|
|
break;
|
|
}
|
|
co = next_tabstop(co);
|
|
} else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
|
|
co++; // display as ^X, use 2 columns
|
|
}
|
|
co++;
|
|
tp++;
|
|
}
|
|
|
|
// "co" is the column where "dot" is.
|
|
// The screen has "columns" columns.
|
|
// The currently displayed columns are 0+offset -- columns+ofset
|
|
// |-------------------------------------------------------------|
|
|
// ^ ^ ^
|
|
// offset | |------- columns ----------------|
|
|
//
|
|
// If "co" is already in this range then we do not have to adjust offset
|
|
// but, we do have to subtract the "offset" bias from "co".
|
|
// If "co" is outside this range then we have to change "offset".
|
|
// If the first char of a line is a tab the cursor will try to stay
|
|
// in column 7, but we have to set offset to 0.
|
|
|
|
if (co < 0 + offset) {
|
|
offset = co;
|
|
}
|
|
if (co >= columns + offset) {
|
|
offset = co - columns + 1;
|
|
}
|
|
// if the first char of the line is a tab, and "dot" is sitting on it
|
|
// force offset to 0.
|
|
if (d == beg_cur && *d == '\t') {
|
|
offset = 0;
|
|
}
|
|
co -= offset;
|
|
|
|
*row = ro;
|
|
*col = co;
|
|
}
|
|
|
|
//----- Format a text[] line into a buffer ---------------------
|
|
static char* format_line(char *src /*, int li*/)
|
|
{
|
|
unsigned char c;
|
|
int co;
|
|
int ofs = offset;
|
|
char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
|
|
|
|
c = '~'; // char in col 0 in non-existent lines is '~'
|
|
co = 0;
|
|
while (co < columns + tabstop) {
|
|
// have we gone past the end?
|
|
if (src < end) {
|
|
c = *src++;
|
|
if (c == '\n')
|
|
break;
|
|
if ((c & 0x80) && !Isprint(c)) {
|
|
c = '.';
|
|
}
|
|
if (c < ' ' || c == 0x7f) {
|
|
if (c == '\t') {
|
|
c = ' ';
|
|
// co % 8 != 7
|
|
while ((co % tabstop) != (tabstop - 1)) {
|
|
dest[co++] = c;
|
|
}
|
|
} else {
|
|
dest[co++] = '^';
|
|
if (c == 0x7f)
|
|
c = '?';
|
|
else
|
|
c += '@'; // Ctrl-X -> 'X'
|
|
}
|
|
}
|
|
}
|
|
dest[co++] = c;
|
|
// discard scrolled-off-to-the-left portion,
|
|
// in tabstop-sized pieces
|
|
if (ofs >= tabstop && co >= tabstop) {
|
|
memmove(dest, dest + tabstop, co);
|
|
co -= tabstop;
|
|
ofs -= tabstop;
|
|
}
|
|
if (src >= end)
|
|
break;
|
|
}
|
|
// check "short line, gigantic offset" case
|
|
if (co < ofs)
|
|
ofs = co;
|
|
// discard last scrolled off part
|
|
co -= ofs;
|
|
dest += ofs;
|
|
// fill the rest with spaces
|
|
if (co < columns)
|
|
memset(&dest[co], ' ', columns - co);
|
|
return dest;
|
|
}
|
|
|
|
//----- Refresh the changed screen lines -----------------------
|
|
// Copy the source line from text[] into the buffer and note
|
|
// if the current screenline is different from the new buffer.
|
|
// If they differ then that line needs redrawing on the terminal.
|
|
//
|
|
static void refresh(int full_screen)
|
|
{
|
|
#define old_offset refresh__old_offset
|
|
|
|
int li, changed;
|
|
char *tp, *sp; // pointer into text[] and screen[]
|
|
|
|
if (ENABLE_FEATURE_VI_WIN_RESIZE IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) {
|
|
unsigned c = columns, r = rows;
|
|
query_screen_dimensions();
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
full_screen |= (c - columns) | (r - rows);
|
|
#else
|
|
if (c != columns || r != rows) {
|
|
full_screen = TRUE;
|
|
// update screen memory since SIGWINCH won't have done it
|
|
new_screen(rows, columns);
|
|
}
|
|
#endif
|
|
}
|
|
sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
|
|
tp = screenbegin; // index into text[] of top line
|
|
|
|
// compare text[] to screen[] and mark screen[] lines that need updating
|
|
for (li = 0; li < rows - 1; li++) {
|
|
int cs, ce; // column start & end
|
|
char *out_buf;
|
|
// format current text line
|
|
out_buf = format_line(tp /*, li*/);
|
|
|
|
// skip to the end of the current text[] line
|
|
if (tp < end) {
|
|
char *t = memchr(tp, '\n', end - tp);
|
|
if (!t) t = end - 1;
|
|
tp = t + 1;
|
|
}
|
|
|
|
// see if there are any changes between virtual screen and out_buf
|
|
changed = FALSE; // assume no change
|
|
cs = 0;
|
|
ce = columns - 1;
|
|
sp = &screen[li * columns]; // start of screen line
|
|
if (full_screen) {
|
|
// force re-draw of every single column from 0 - columns-1
|
|
goto re0;
|
|
}
|
|
// compare newly formatted buffer with virtual screen
|
|
// look forward for first difference between buf and screen
|
|
for (; cs <= ce; cs++) {
|
|
if (out_buf[cs] != sp[cs]) {
|
|
changed = TRUE; // mark for redraw
|
|
break;
|
|
}
|
|
}
|
|
|
|
// look backward for last difference between out_buf and screen
|
|
for (; ce >= cs; ce--) {
|
|
if (out_buf[ce] != sp[ce]) {
|
|
changed = TRUE; // mark for redraw
|
|
break;
|
|
}
|
|
}
|
|
// now, cs is index of first diff, and ce is index of last diff
|
|
|
|
// if horz offset has changed, force a redraw
|
|
if (offset != old_offset) {
|
|
re0:
|
|
changed = TRUE;
|
|
}
|
|
|
|
// make a sanity check of columns indexes
|
|
if (cs < 0) cs = 0;
|
|
if (ce > columns - 1) ce = columns - 1;
|
|
if (cs > ce) { cs = 0; ce = columns - 1; }
|
|
// is there a change between virtual screen and out_buf
|
|
if (changed) {
|
|
// copy changed part of buffer to virtual screen
|
|
memcpy(sp+cs, out_buf+cs, ce-cs+1);
|
|
place_cursor(li, cs);
|
|
// write line out to terminal
|
|
fwrite(&sp[cs], ce - cs + 1, 1, stdout);
|
|
}
|
|
}
|
|
|
|
place_cursor(crow, ccol);
|
|
|
|
old_offset = offset;
|
|
#undef old_offset
|
|
}
|
|
|
|
//----- Force refresh of all Lines -----------------------------
|
|
static void redraw(int full_screen)
|
|
{
|
|
// cursor to top,left; clear to the end of screen
|
|
write1(ESC_SET_CURSOR_TOPLEFT ESC_CLEAR2EOS);
|
|
screen_erase(); // erase the internal screen buffer
|
|
last_status_cksum = 0; // force status update
|
|
refresh(full_screen); // this will redraw the entire display
|
|
show_status_line();
|
|
}
|
|
|
|
//----- Flash the screen --------------------------------------
|
|
static void flash(int h)
|
|
{
|
|
standout_start();
|
|
redraw(TRUE);
|
|
mysleep(h);
|
|
standout_end();
|
|
redraw(TRUE);
|
|
}
|
|
|
|
static void indicate_error(void)
|
|
{
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
if (crashme > 0)
|
|
return;
|
|
#endif
|
|
if (!err_method) {
|
|
write1(ESC_BELL);
|
|
} else {
|
|
flash(10);
|
|
}
|
|
}
|
|
|
|
//----- IO Routines --------------------------------------------
|
|
static int readit(void) // read (maybe cursor) key from stdin
|
|
{
|
|
int c;
|
|
|
|
fflush_all();
|
|
|
|
// Wait for input. TIMEOUT = -1 makes read_key wait even
|
|
// on nonblocking stdin.
|
|
// Note: read_key sets errno to 0 on success.
|
|
again:
|
|
c = read_key(STDIN_FILENO, readbuffer, /*timeout:*/ -1);
|
|
if (c == -1) { // EOF/error
|
|
if (errno == EAGAIN) // paranoia
|
|
goto again;
|
|
go_bottom_and_clear_to_eol();
|
|
cookmode(); // terminal to "cooked"
|
|
bb_error_msg_and_die("can't read user input");
|
|
}
|
|
return c;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
static int get_one_char(void)
|
|
{
|
|
int c;
|
|
|
|
if (!adding2q) {
|
|
// we are not adding to the q.
|
|
// but, we may be reading from a saved q.
|
|
// (checking "ioq" for NULL is wrong, it's not reset to NULL
|
|
// when done - "ioq_start" is reset instead).
|
|
if (ioq_start != NULL) {
|
|
// there is a queue to get chars from.
|
|
// careful with correct sign expansion!
|
|
c = (unsigned char)*ioq++;
|
|
if (c != '\0')
|
|
return c;
|
|
// the end of the q
|
|
free(ioq_start);
|
|
ioq_start = NULL;
|
|
// read from STDIN:
|
|
}
|
|
return readit();
|
|
}
|
|
// we are adding STDIN chars to q.
|
|
c = readit();
|
|
if (lmc_len >= ARRAY_SIZE(last_modifying_cmd) - 1) {
|
|
// last_modifying_cmd[] is too small, can't remeber the cmd
|
|
// - drop it
|
|
adding2q = 0;
|
|
lmc_len = 0;
|
|
} else {
|
|
last_modifying_cmd[lmc_len++] = c;
|
|
}
|
|
return c;
|
|
}
|
|
#else
|
|
# define get_one_char() readit()
|
|
#endif
|
|
|
|
// Get input line (uses "status line" area)
|
|
static char *get_input_line(const char *prompt)
|
|
{
|
|
// char [MAX_INPUT_LEN]
|
|
#define buf get_input_line__buf
|
|
|
|
int c;
|
|
int i;
|
|
|
|
strcpy(buf, prompt);
|
|
last_status_cksum = 0; // force status update
|
|
go_bottom_and_clear_to_eol();
|
|
write1(prompt); // write out the :, /, or ? prompt
|
|
|
|
i = strlen(buf);
|
|
while (i < MAX_INPUT_LEN) {
|
|
c = get_one_char();
|
|
if (c == '\n' || c == '\r' || c == 27)
|
|
break; // this is end of input
|
|
if (c == term_orig.c_cc[VERASE] || c == 8 || c == 127) {
|
|
// user wants to erase prev char
|
|
buf[--i] = '\0';
|
|
write1("\b \b"); // erase char on screen
|
|
if (i <= 0) // user backs up before b-o-l, exit
|
|
break;
|
|
} else if (c > 0 && c < 256) { // exclude Unicode
|
|
// (TODO: need to handle Unicode)
|
|
buf[i] = c;
|
|
buf[++i] = '\0';
|
|
bb_putchar(c);
|
|
}
|
|
}
|
|
refresh(FALSE);
|
|
return buf;
|
|
#undef buf
|
|
}
|
|
|
|
static void Hit_Return(void)
|
|
{
|
|
int c;
|
|
|
|
standout_start();
|
|
write1("[Hit return to continue]");
|
|
standout_end();
|
|
while ((c = get_one_char()) != '\n' && c != '\r')
|
|
continue;
|
|
redraw(TRUE); // force redraw all
|
|
}
|
|
|
|
//----- Draw the status line at bottom of the screen -------------
|
|
// show file status on status line
|
|
static int format_edit_status(void)
|
|
{
|
|
static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
|
|
|
|
#define tot format_edit_status__tot
|
|
|
|
int cur, percent, ret, trunc_at;
|
|
|
|
// modified_count is now a counter rather than a flag. this
|
|
// helps reduce the amount of line counting we need to do.
|
|
// (this will cause a mis-reporting of modified status
|
|
// once every MAXINT editing operations.)
|
|
|
|
// it would be nice to do a similar optimization here -- if
|
|
// we haven't done a motion that could have changed which line
|
|
// we're on, then we shouldn't have to do this count_lines()
|
|
cur = count_lines(text, dot);
|
|
|
|
// count_lines() is expensive.
|
|
// Call it only if something was changed since last time
|
|
// we were here:
|
|
if (modified_count != last_modified_count) {
|
|
tot = cur + count_lines(dot, end - 1) - 1;
|
|
last_modified_count = modified_count;
|
|
}
|
|
|
|
// current line percent
|
|
// ------------- ~~ ----------
|
|
// total lines 100
|
|
if (tot > 0) {
|
|
percent = (100 * cur) / tot;
|
|
} else {
|
|
cur = tot = 0;
|
|
percent = 100;
|
|
}
|
|
|
|
trunc_at = columns < STATUS_BUFFER_LEN-1 ?
|
|
columns : STATUS_BUFFER_LEN-1;
|
|
|
|
ret = snprintf(status_buffer, trunc_at+1,
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
"%c %s%s%s %d/%d %d%%",
|
|
#else
|
|
"%c %s%s %d/%d %d%%",
|
|
#endif
|
|
cmd_mode_indicator[cmd_mode & 3],
|
|
(current_filename != NULL ? current_filename : "No file"),
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
(readonly_mode ? " [Readonly]" : ""),
|
|
#endif
|
|
(modified_count ? " [Modified]" : ""),
|
|
cur, tot, percent);
|
|
|
|
if (ret >= 0 && ret < trunc_at)
|
|
return ret; // it all fit
|
|
|
|
return trunc_at; // had to truncate
|
|
#undef tot
|
|
}
|
|
|
|
static int bufsum(char *buf, int count)
|
|
{
|
|
int sum = 0;
|
|
char *e = buf + count;
|
|
while (buf < e)
|
|
sum += (unsigned char) *buf++;
|
|
return sum;
|
|
}
|
|
|
|
static void show_status_line(void)
|
|
{
|
|
int cnt = 0, cksum = 0;
|
|
|
|
// either we already have an error or status message, or we
|
|
// create one.
|
|
if (!have_status_msg) {
|
|
cnt = format_edit_status();
|
|
cksum = bufsum(status_buffer, cnt);
|
|
}
|
|
if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
|
|
last_status_cksum = cksum; // remember if we have seen this line
|
|
go_bottom_and_clear_to_eol();
|
|
write1(status_buffer);
|
|
if (have_status_msg) {
|
|
if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
|
|
(columns - 1) ) {
|
|
have_status_msg = 0;
|
|
Hit_Return();
|
|
}
|
|
have_status_msg = 0;
|
|
}
|
|
place_cursor(crow, ccol); // put cursor back in correct place
|
|
}
|
|
fflush_all();
|
|
}
|
|
|
|
//----- format the status buffer, the bottom line of screen ------
|
|
static void status_line(const char *format, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
vsnprintf(status_buffer, STATUS_BUFFER_LEN, format, args);
|
|
va_end(args);
|
|
|
|
have_status_msg = 1;
|
|
}
|
|
static void status_line_bold(const char *format, ...)
|
|
{
|
|
va_list args;
|
|
|
|
va_start(args, format);
|
|
strcpy(status_buffer, ESC_BOLD_TEXT);
|
|
vsnprintf(status_buffer + (sizeof(ESC_BOLD_TEXT)-1),
|
|
STATUS_BUFFER_LEN - sizeof(ESC_BOLD_TEXT) - sizeof(ESC_NORM_TEXT),
|
|
format, args
|
|
);
|
|
strcat(status_buffer, ESC_NORM_TEXT);
|
|
va_end(args);
|
|
|
|
have_status_msg = 1 + (sizeof(ESC_BOLD_TEXT)-1) + (sizeof(ESC_NORM_TEXT)-1);
|
|
}
|
|
static void status_line_bold_errno(const char *fn)
|
|
{
|
|
status_line_bold("'%s' "STRERROR_FMT, fn STRERROR_ERRNO);
|
|
}
|
|
|
|
// copy s to buf, convert unprintable
|
|
static void print_literal(char *buf, const char *s)
|
|
{
|
|
char *d;
|
|
unsigned char c;
|
|
|
|
buf[0] = '\0';
|
|
if (!s[0])
|
|
s = "(NULL)";
|
|
|
|
d = buf;
|
|
for (; *s; s++) {
|
|
int c_is_no_print;
|
|
|
|
c = *s;
|
|
c_is_no_print = (c & 0x80) && !Isprint(c);
|
|
if (c_is_no_print) {
|
|
strcpy(d, ESC_NORM_TEXT);
|
|
d += sizeof(ESC_NORM_TEXT)-1;
|
|
c = '.';
|
|
}
|
|
if (c < ' ' || c == 0x7f) {
|
|
*d++ = '^';
|
|
c |= '@'; // 0x40
|
|
if (c == 0x7f)
|
|
c = '?';
|
|
}
|
|
*d++ = c;
|
|
*d = '\0';
|
|
if (c_is_no_print) {
|
|
strcpy(d, ESC_BOLD_TEXT);
|
|
d += sizeof(ESC_BOLD_TEXT)-1;
|
|
}
|
|
if (*s == '\n') {
|
|
*d++ = '$';
|
|
*d = '\0';
|
|
}
|
|
if (d - buf > MAX_INPUT_LEN - 10) // paranoia
|
|
break;
|
|
}
|
|
}
|
|
static void not_implemented(const char *s)
|
|
{
|
|
char buf[MAX_INPUT_LEN];
|
|
print_literal(buf, s);
|
|
status_line_bold("'%s' is not implemented", buf);
|
|
}
|
|
|
|
//----- Block insert/delete, undo ops --------------------------
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
static char *text_yank(char *p, char *q, int dest) // copy text into a register
|
|
{
|
|
int cnt = q - p;
|
|
if (cnt < 0) { // they are backwards- reverse them
|
|
p = q;
|
|
cnt = -cnt;
|
|
}
|
|
free(reg[dest]); // if already a yank register, free it
|
|
reg[dest] = xstrndup(p, cnt + 1);
|
|
return p;
|
|
}
|
|
|
|
static char what_reg(void)
|
|
{
|
|
char c;
|
|
|
|
c = 'D'; // default to D-reg
|
|
if (YDreg <= 25)
|
|
c = 'a' + (char) YDreg;
|
|
if (YDreg == 26)
|
|
c = 'D';
|
|
if (YDreg == 27)
|
|
c = 'U';
|
|
return c;
|
|
}
|
|
|
|
static void check_context(char cmd)
|
|
{
|
|
// A context is defined to be "modifying text"
|
|
// Any modifying command establishes a new context.
|
|
|
|
if (dot < context_start || dot > context_end) {
|
|
if (strchr(modifying_cmds, cmd) != NULL) {
|
|
// we are trying to modify text[]- make this the current context
|
|
mark[27] = mark[26]; // move cur to prev
|
|
mark[26] = dot; // move local to cur
|
|
context_start = prev_line(prev_line(dot));
|
|
context_end = next_line(next_line(dot));
|
|
//loiter= start_loiter= now;
|
|
}
|
|
}
|
|
}
|
|
|
|
static char *swap_context(char *p) // goto new context for '' command make this the current context
|
|
{
|
|
char *tmp;
|
|
|
|
// the current context is in mark[26]
|
|
// the previous context is in mark[27]
|
|
// only swap context if other context is valid
|
|
if (text <= mark[27] && mark[27] <= end - 1) {
|
|
tmp = mark[27];
|
|
mark[27] = p;
|
|
mark[26] = p = tmp;
|
|
context_start = prev_line(prev_line(prev_line(p)));
|
|
context_end = next_line(next_line(next_line(p)));
|
|
}
|
|
return p;
|
|
}
|
|
#endif /* FEATURE_VI_YANKMARK */
|
|
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
static void undo_push(char *, unsigned, unsigned char);
|
|
#endif
|
|
|
|
// open a hole in text[]
|
|
// might reallocate text[]! use p += text_hole_make(p, ...),
|
|
// and be careful to not use pointers into potentially freed text[]!
|
|
static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
|
|
{
|
|
uintptr_t bias = 0;
|
|
|
|
if (size <= 0)
|
|
return bias;
|
|
end += size; // adjust the new END
|
|
if (end >= (text + text_size)) {
|
|
char *new_text;
|
|
text_size += end - (text + text_size) + 10240;
|
|
new_text = xrealloc(text, text_size);
|
|
bias = (new_text - text);
|
|
screenbegin += bias;
|
|
dot += bias;
|
|
end += bias;
|
|
p += bias;
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
{
|
|
int i;
|
|
for (i = 0; i < ARRAY_SIZE(mark); i++)
|
|
if (mark[i])
|
|
mark[i] += bias;
|
|
}
|
|
#endif
|
|
text = new_text;
|
|
}
|
|
memmove(p + size, p, end - size - p);
|
|
memset(p, ' ', size); // clear new hole
|
|
return bias;
|
|
}
|
|
|
|
// close a hole in text[] - delete "p" through "q", inclusive
|
|
// "undo" value indicates if this operation should be undo-able
|
|
#if !ENABLE_FEATURE_VI_UNDO
|
|
#define text_hole_delete(a,b,c) text_hole_delete(a,b)
|
|
#endif
|
|
static char *text_hole_delete(char *p, char *q, int undo)
|
|
{
|
|
char *src, *dest;
|
|
int cnt, hole_size;
|
|
|
|
// move forwards, from beginning
|
|
// assume p <= q
|
|
src = q + 1;
|
|
dest = p;
|
|
if (q < p) { // they are backward- swap them
|
|
src = p + 1;
|
|
dest = q;
|
|
}
|
|
hole_size = q - p + 1;
|
|
cnt = end - src;
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
switch (undo) {
|
|
case NO_UNDO:
|
|
break;
|
|
case ALLOW_UNDO:
|
|
undo_push(p, hole_size, UNDO_DEL);
|
|
break;
|
|
case ALLOW_UNDO_CHAIN:
|
|
undo_push(p, hole_size, UNDO_DEL_CHAIN);
|
|
break;
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
case ALLOW_UNDO_QUEUED:
|
|
undo_push(p, hole_size, UNDO_DEL_QUEUED);
|
|
break;
|
|
# endif
|
|
}
|
|
modified_count--;
|
|
#endif
|
|
if (src < text || src > end)
|
|
goto thd0;
|
|
if (dest < text || dest >= end)
|
|
goto thd0;
|
|
modified_count++;
|
|
if (src >= end)
|
|
goto thd_atend; // just delete the end of the buffer
|
|
memmove(dest, src, cnt);
|
|
thd_atend:
|
|
end = end - hole_size; // adjust the new END
|
|
if (dest >= end)
|
|
dest = end - 1; // make sure dest in below end-1
|
|
if (end <= text)
|
|
dest = end = text; // keep pointers valid
|
|
thd0:
|
|
return dest;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
// Flush any queued objects to the undo stack
|
|
static void undo_queue_commit(void)
|
|
{
|
|
// Pushes the queue object onto the undo stack
|
|
if (undo_q > 0) {
|
|
// Deleted character undo events grow from the end
|
|
undo_push(undo_queue + CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q,
|
|
undo_q,
|
|
(undo_queue_state | UNDO_USE_SPOS)
|
|
);
|
|
undo_queue_state = UNDO_EMPTY;
|
|
undo_q = 0;
|
|
}
|
|
}
|
|
# else
|
|
# define undo_queue_commit() ((void)0)
|
|
# endif
|
|
|
|
static void flush_undo_data(void)
|
|
{
|
|
struct undo_object *undo_entry;
|
|
|
|
while (undo_stack_tail) {
|
|
undo_entry = undo_stack_tail;
|
|
undo_stack_tail = undo_entry->prev;
|
|
free(undo_entry);
|
|
}
|
|
}
|
|
|
|
// Undo functions and hooks added by Jody Bruchon (jody@jodybruchon.com)
|
|
// Add to the undo stack
|
|
static void undo_push(char *src, unsigned length, uint8_t u_type)
|
|
{
|
|
struct undo_object *undo_entry;
|
|
|
|
// "u_type" values
|
|
// UNDO_INS: insertion, undo will remove from buffer
|
|
// UNDO_DEL: deleted text, undo will restore to buffer
|
|
// UNDO_{INS,DEL}_CHAIN: Same as above but also calls undo_pop() when complete
|
|
// The CHAIN operations are for handling multiple operations that the user
|
|
// performs with a single action, i.e. REPLACE mode or find-and-replace commands
|
|
// UNDO_{INS,DEL}_QUEUED: If queuing feature is enabled, allow use of the queue
|
|
// for the INS/DEL operation. The raw values should be equal to the values of
|
|
// UNDO_{INS,DEL} ORed with UNDO_QUEUED_FLAG
|
|
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
// This undo queuing functionality groups multiple character typing or backspaces
|
|
// into a single large undo object. This greatly reduces calls to malloc() for
|
|
// single-character operations while typing and has the side benefit of letting
|
|
// an undo operation remove chunks of text rather than a single character.
|
|
switch (u_type) {
|
|
case UNDO_EMPTY: // Just in case this ever happens...
|
|
return;
|
|
case UNDO_DEL_QUEUED:
|
|
if (length != 1)
|
|
return; // Only queue single characters
|
|
switch (undo_queue_state) {
|
|
case UNDO_EMPTY:
|
|
undo_queue_state = UNDO_DEL;
|
|
case UNDO_DEL:
|
|
undo_queue_spos = src;
|
|
undo_q++;
|
|
undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q] = *src;
|
|
// If queue is full, dump it into an object
|
|
if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX)
|
|
undo_queue_commit();
|
|
return;
|
|
case UNDO_INS:
|
|
// Switch from storing inserted text to deleted text
|
|
undo_queue_commit();
|
|
undo_push(src, length, UNDO_DEL_QUEUED);
|
|
return;
|
|
}
|
|
break;
|
|
case UNDO_INS_QUEUED:
|
|
if (length < 1)
|
|
return;
|
|
switch (undo_queue_state) {
|
|
case UNDO_EMPTY:
|
|
undo_queue_state = UNDO_INS;
|
|
undo_queue_spos = src;
|
|
case UNDO_INS:
|
|
while (length--) {
|
|
undo_q++; // Don't need to save any data for insertions
|
|
if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX)
|
|
undo_queue_commit();
|
|
}
|
|
return;
|
|
case UNDO_DEL:
|
|
// Switch from storing deleted text to inserted text
|
|
undo_queue_commit();
|
|
undo_push(src, length, UNDO_INS_QUEUED);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
# else
|
|
// If undo queuing is disabled, ignore the queuing flag entirely
|
|
u_type = u_type & ~UNDO_QUEUED_FLAG;
|
|
# endif
|
|
|
|
// Allocate a new undo object
|
|
if (u_type == UNDO_DEL || u_type == UNDO_DEL_CHAIN) {
|
|
// For UNDO_DEL objects, save deleted text
|
|
if ((text + length) == end)
|
|
length--;
|
|
// If this deletion empties text[], strip the newline. When the buffer becomes
|
|
// zero-length, a newline is added back, which requires this to compensate.
|
|
undo_entry = xzalloc(offsetof(struct undo_object, undo_text) + length);
|
|
memcpy(undo_entry->undo_text, src, length);
|
|
} else {
|
|
undo_entry = xzalloc(sizeof(*undo_entry));
|
|
}
|
|
undo_entry->length = length;
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
if ((u_type & UNDO_USE_SPOS) != 0) {
|
|
undo_entry->start = undo_queue_spos - text; // use start position from queue
|
|
} else {
|
|
undo_entry->start = src - text; // use offset from start of text buffer
|
|
}
|
|
u_type = (u_type & ~UNDO_USE_SPOS);
|
|
# else
|
|
undo_entry->start = src - text;
|
|
# endif
|
|
undo_entry->u_type = u_type;
|
|
|
|
// Push it on undo stack
|
|
undo_entry->prev = undo_stack_tail;
|
|
undo_stack_tail = undo_entry;
|
|
modified_count++;
|
|
}
|
|
|
|
static void undo_push_insert(char *p, int len, int undo)
|
|
{
|
|
switch (undo) {
|
|
case ALLOW_UNDO:
|
|
undo_push(p, len, UNDO_INS);
|
|
break;
|
|
case ALLOW_UNDO_CHAIN:
|
|
undo_push(p, len, UNDO_INS_CHAIN);
|
|
break;
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
case ALLOW_UNDO_QUEUED:
|
|
undo_push(p, len, UNDO_INS_QUEUED);
|
|
break;
|
|
# endif
|
|
}
|
|
}
|
|
|
|
// Undo the last operation
|
|
static void undo_pop(void)
|
|
{
|
|
int repeat;
|
|
char *u_start, *u_end;
|
|
struct undo_object *undo_entry;
|
|
|
|
// Commit pending undo queue before popping (should be unnecessary)
|
|
undo_queue_commit();
|
|
|
|
undo_entry = undo_stack_tail;
|
|
// Check for an empty undo stack
|
|
if (!undo_entry) {
|
|
status_line("Already at oldest change");
|
|
return;
|
|
}
|
|
|
|
switch (undo_entry->u_type) {
|
|
case UNDO_DEL:
|
|
case UNDO_DEL_CHAIN:
|
|
// make hole and put in text that was deleted; deallocate text
|
|
u_start = text + undo_entry->start;
|
|
text_hole_make(u_start, undo_entry->length);
|
|
memcpy(u_start, undo_entry->undo_text, undo_entry->length);
|
|
status_line("Undo [%d] %s %d chars at position %d",
|
|
modified_count, "restored",
|
|
undo_entry->length, undo_entry->start
|
|
);
|
|
break;
|
|
case UNDO_INS:
|
|
case UNDO_INS_CHAIN:
|
|
// delete what was inserted
|
|
u_start = undo_entry->start + text;
|
|
u_end = u_start - 1 + undo_entry->length;
|
|
text_hole_delete(u_start, u_end, NO_UNDO);
|
|
status_line("Undo [%d] %s %d chars at position %d",
|
|
modified_count, "deleted",
|
|
undo_entry->length, undo_entry->start
|
|
);
|
|
break;
|
|
}
|
|
repeat = 0;
|
|
switch (undo_entry->u_type) {
|
|
// If this is the end of a chain, lower modification count and refresh display
|
|
case UNDO_DEL:
|
|
case UNDO_INS:
|
|
dot = (text + undo_entry->start);
|
|
refresh(FALSE);
|
|
break;
|
|
case UNDO_DEL_CHAIN:
|
|
case UNDO_INS_CHAIN:
|
|
repeat = 1;
|
|
break;
|
|
}
|
|
// Deallocate the undo object we just processed
|
|
undo_stack_tail = undo_entry->prev;
|
|
free(undo_entry);
|
|
modified_count--;
|
|
// For chained operations, continue popping all the way down the chain.
|
|
if (repeat) {
|
|
undo_pop(); // Follow the undo chain if one exists
|
|
}
|
|
}
|
|
|
|
#else
|
|
# define flush_undo_data() ((void)0)
|
|
# define undo_queue_commit() ((void)0)
|
|
#endif /* ENABLE_FEATURE_VI_UNDO */
|
|
|
|
//----- Dot Movement Routines ----------------------------------
|
|
static void dot_left(void)
|
|
{
|
|
undo_queue_commit();
|
|
if (dot > text && dot[-1] != '\n')
|
|
dot--;
|
|
}
|
|
|
|
static void dot_right(void)
|
|
{
|
|
undo_queue_commit();
|
|
if (dot < end - 1 && *dot != '\n')
|
|
dot++;
|
|
}
|
|
|
|
static void dot_begin(void)
|
|
{
|
|
undo_queue_commit();
|
|
dot = begin_line(dot); // return pointer to first char cur line
|
|
}
|
|
|
|
static void dot_end(void)
|
|
{
|
|
undo_queue_commit();
|
|
dot = end_line(dot); // return pointer to last char cur line
|
|
}
|
|
|
|
static char *move_to_col(char *p, int l)
|
|
{
|
|
int co;
|
|
|
|
p = begin_line(p);
|
|
co = 0;
|
|
while (co < l && p < end) {
|
|
if (*p == '\n') //vda || *p == '\0')
|
|
break;
|
|
if (*p == '\t') {
|
|
co = next_tabstop(co);
|
|
} else if (*p < ' ' || *p == 127) {
|
|
co++; // display as ^X, use 2 columns
|
|
}
|
|
co++;
|
|
p++;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static void dot_next(void)
|
|
{
|
|
undo_queue_commit();
|
|
dot = next_line(dot);
|
|
}
|
|
|
|
static void dot_prev(void)
|
|
{
|
|
undo_queue_commit();
|
|
dot = prev_line(dot);
|
|
}
|
|
|
|
static void dot_skip_over_ws(void)
|
|
{
|
|
// skip WS
|
|
while (isspace(*dot) && *dot != '\n' && dot < end - 1)
|
|
dot++;
|
|
}
|
|
|
|
static void dot_scroll(int cnt, int dir)
|
|
{
|
|
char *q;
|
|
|
|
undo_queue_commit();
|
|
for (; cnt > 0; cnt--) {
|
|
if (dir < 0) {
|
|
// scroll Backwards
|
|
// ctrl-Y scroll up one line
|
|
screenbegin = prev_line(screenbegin);
|
|
} else {
|
|
// scroll Forwards
|
|
// ctrl-E scroll down one line
|
|
screenbegin = next_line(screenbegin);
|
|
}
|
|
}
|
|
// make sure "dot" stays on the screen so we dont scroll off
|
|
if (dot < screenbegin)
|
|
dot = screenbegin;
|
|
q = end_screen(); // find new bottom line
|
|
if (dot > q)
|
|
dot = begin_line(q); // is dot is below bottom line?
|
|
dot_skip_over_ws();
|
|
}
|
|
|
|
static char *bound_dot(char *p) // make sure text[0] <= P < "end"
|
|
{
|
|
if (p >= end && end > text) {
|
|
p = end - 1;
|
|
indicate_error();
|
|
}
|
|
if (p < text) {
|
|
p = text;
|
|
indicate_error();
|
|
}
|
|
return p;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
static void start_new_cmd_q(char c)
|
|
{
|
|
// get buffer for new cmd
|
|
// if there is a current cmd count put it in the buffer first
|
|
if (cmdcnt > 0) {
|
|
lmc_len = sprintf(last_modifying_cmd, "%u%c", cmdcnt, c);
|
|
} else { // just save char c onto queue
|
|
last_modifying_cmd[0] = c;
|
|
lmc_len = 1;
|
|
}
|
|
adding2q = 1;
|
|
}
|
|
static void end_cmd_q(void)
|
|
{
|
|
# if ENABLE_FEATURE_VI_YANKMARK
|
|
YDreg = 26; // go back to default Yank/Delete reg
|
|
# endif
|
|
adding2q = 0;
|
|
}
|
|
#else
|
|
# define end_cmd_q() ((void)0)
|
|
#endif /* FEATURE_VI_DOT_CMD */
|
|
|
|
// copy text into register, then delete text.
|
|
// if dist <= 0, do not include, or go past, a NewLine
|
|
//
|
|
#if !ENABLE_FEATURE_VI_UNDO
|
|
#define yank_delete(a,b,c,d,e) yank_delete(a,b,c,d)
|
|
#endif
|
|
static char *yank_delete(char *start, char *stop, int dist, int yf, int undo)
|
|
{
|
|
char *p;
|
|
|
|
// make sure start <= stop
|
|
if (start > stop) {
|
|
// they are backwards, reverse them
|
|
p = start;
|
|
start = stop;
|
|
stop = p;
|
|
}
|
|
if (dist <= 0) {
|
|
// we cannot cross NL boundaries
|
|
p = start;
|
|
if (*p == '\n')
|
|
return p;
|
|
// dont go past a NewLine
|
|
for (; p + 1 <= stop; p++) {
|
|
if (p[1] == '\n') {
|
|
stop = p; // "stop" just before NewLine
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
p = start;
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
text_yank(start, stop, YDreg);
|
|
#endif
|
|
if (yf == YANKDEL) {
|
|
p = text_hole_delete(start, stop, undo);
|
|
} // delete lines
|
|
return p;
|
|
}
|
|
|
|
// might reallocate text[]!
|
|
static int file_insert(const char *fn, char *p, int initial)
|
|
{
|
|
int cnt = -1;
|
|
int fd, size;
|
|
struct stat statbuf;
|
|
|
|
if (p < text)
|
|
p = text;
|
|
if (p > end)
|
|
p = end;
|
|
|
|
fd = open(fn, O_RDONLY);
|
|
if (fd < 0) {
|
|
if (!initial)
|
|
status_line_bold_errno(fn);
|
|
return cnt;
|
|
}
|
|
|
|
// Validate file
|
|
if (fstat(fd, &statbuf) < 0) {
|
|
status_line_bold_errno(fn);
|
|
goto fi;
|
|
}
|
|
if (!S_ISREG(statbuf.st_mode)) {
|
|
status_line_bold("'%s' is not a regular file", fn);
|
|
goto fi;
|
|
}
|
|
size = (statbuf.st_size < INT_MAX ? (int)statbuf.st_size : INT_MAX);
|
|
p += text_hole_make(p, size);
|
|
cnt = full_read(fd, p, size);
|
|
if (cnt < 0) {
|
|
status_line_bold_errno(fn);
|
|
p = text_hole_delete(p, p + size - 1, NO_UNDO); // un-do buffer insert
|
|
} else if (cnt < size) {
|
|
// There was a partial read, shrink unused space
|
|
p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO);
|
|
status_line_bold("can't read '%s'", fn);
|
|
}
|
|
fi:
|
|
close(fd);
|
|
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
if (initial
|
|
&& ((access(fn, W_OK) < 0) ||
|
|
// root will always have access()
|
|
// so we check fileperms too
|
|
!(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
|
|
)
|
|
) {
|
|
SET_READONLY_FILE(readonly_mode);
|
|
}
|
|
#endif
|
|
return cnt;
|
|
}
|
|
|
|
// find matching char of pair () [] {}
|
|
// will crash if c is not one of these
|
|
static char *find_pair(char *p, const char c)
|
|
{
|
|
const char *braces = "()[]{}";
|
|
char match;
|
|
int dir, level;
|
|
|
|
dir = strchr(braces, c) - braces;
|
|
dir ^= 1;
|
|
match = braces[dir];
|
|
dir = ((dir & 1) << 1) - 1; // 1 for ([{, -1 for )\}
|
|
|
|
// look for match, count levels of pairs (( ))
|
|
level = 1;
|
|
for (;;) {
|
|
p += dir;
|
|
if (p < text || p >= end)
|
|
return NULL;
|
|
if (*p == c)
|
|
level++; // increase pair levels
|
|
if (*p == match) {
|
|
level--; // reduce pair level
|
|
if (level == 0)
|
|
return p; // found matching pair
|
|
}
|
|
}
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
// show the matching char of a pair, () [] {}
|
|
static void showmatching(char *p)
|
|
{
|
|
char *q, *save_dot;
|
|
|
|
// we found half of a pair
|
|
q = find_pair(p, *p); // get loc of matching char
|
|
if (q == NULL) {
|
|
indicate_error(); // no matching char
|
|
} else {
|
|
// "q" now points to matching pair
|
|
save_dot = dot; // remember where we are
|
|
dot = q; // go to new loc
|
|
refresh(FALSE); // let the user see it
|
|
mysleep(40); // give user some time
|
|
dot = save_dot; // go back to old loc
|
|
refresh(FALSE);
|
|
}
|
|
}
|
|
#endif /* FEATURE_VI_SETOPTS */
|
|
|
|
// might reallocate text[]! use p += stupid_insert(p, ...),
|
|
// and be careful to not use pointers into potentially freed text[]!
|
|
static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
|
|
{
|
|
uintptr_t bias;
|
|
bias = text_hole_make(p, 1);
|
|
p += bias;
|
|
*p = c;
|
|
return bias;
|
|
}
|
|
|
|
#if !ENABLE_FEATURE_VI_UNDO
|
|
#define char_insert(a,b,c) char_insert(a,b)
|
|
#endif
|
|
static char *char_insert(char *p, char c, int undo) // insert the char c at 'p'
|
|
{
|
|
if (c == 22) { // Is this an ctrl-V?
|
|
p += stupid_insert(p, '^'); // use ^ to indicate literal next
|
|
refresh(FALSE); // show the ^
|
|
c = get_one_char();
|
|
*p = c;
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
undo_push_insert(p, 1, undo);
|
|
#else
|
|
modified_count++;
|
|
#endif
|
|
p++;
|
|
} else if (c == 27) { // Is this an ESC?
|
|
cmd_mode = 0;
|
|
undo_queue_commit();
|
|
cmdcnt = 0;
|
|
end_cmd_q(); // stop adding to q
|
|
last_status_cksum = 0; // force status update
|
|
if ((p[-1] != '\n') && (dot > text)) {
|
|
p--;
|
|
}
|
|
} else if (c == term_orig.c_cc[VERASE] || c == 8 || c == 127) { // Is this a BS
|
|
if (p > text) {
|
|
p--;
|
|
p = text_hole_delete(p, p, ALLOW_UNDO_QUEUED); // shrink buffer 1 char
|
|
}
|
|
} else {
|
|
// insert a char into text[]
|
|
if (c == 13)
|
|
c = '\n'; // translate \r to \n
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
if (c == '\n')
|
|
undo_queue_commit();
|
|
# endif
|
|
undo_push_insert(p, 1, undo);
|
|
#else
|
|
modified_count++;
|
|
#endif
|
|
p += 1 + stupid_insert(p, c); // insert the char
|
|
#if ENABLE_FEATURE_VI_SETOPTS
|
|
if (showmatch && strchr(")]}", c) != NULL) {
|
|
showmatching(p - 1);
|
|
}
|
|
if (autoindent && c == '\n') { // auto indent the new line
|
|
char *q;
|
|
size_t len;
|
|
q = prev_line(p); // use prev line as template
|
|
len = strspn(q, " \t"); // space or tab
|
|
if (len) {
|
|
uintptr_t bias;
|
|
bias = text_hole_make(p, len);
|
|
p += bias;
|
|
q += bias;
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
undo_push_insert(p, len, undo);
|
|
#endif
|
|
memcpy(p, q, len);
|
|
p += len;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
return p;
|
|
}
|
|
|
|
// read text from file or create an empty buf
|
|
// will also update current_filename
|
|
static int init_text_buffer(char *fn)
|
|
{
|
|
int rc;
|
|
|
|
// allocate/reallocate text buffer
|
|
free(text);
|
|
text_size = 10240;
|
|
screenbegin = dot = end = text = xzalloc(text_size);
|
|
|
|
if (fn != current_filename) {
|
|
free(current_filename);
|
|
current_filename = xstrdup(fn);
|
|
}
|
|
rc = file_insert(fn, text, 1);
|
|
if (rc < 0) {
|
|
// file doesnt exist. Start empty buf with dummy line
|
|
char_insert(text, '\n', NO_UNDO);
|
|
}
|
|
|
|
flush_undo_data();
|
|
modified_count = 0;
|
|
last_modified_count = -1;
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
// init the marks
|
|
memset(mark, 0, sizeof(mark));
|
|
#endif
|
|
return rc;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_YANKMARK \
|
|
|| (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
|
|
|| ENABLE_FEATURE_VI_CRASHME
|
|
// might reallocate text[]! use p += string_insert(p, ...),
|
|
// and be careful to not use pointers into potentially freed text[]!
|
|
# if !ENABLE_FEATURE_VI_UNDO
|
|
# define string_insert(a,b,c) string_insert(a,b)
|
|
# endif
|
|
static uintptr_t string_insert(char *p, const char *s, int undo) // insert the string at 'p'
|
|
{
|
|
uintptr_t bias;
|
|
int i;
|
|
|
|
i = strlen(s);
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
undo_push_insert(p, i, undo);
|
|
#endif
|
|
bias = text_hole_make(p, i);
|
|
p += bias;
|
|
memcpy(p, s, i);
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
{
|
|
int cnt;
|
|
for (cnt = 0; *s != '\0'; s++) {
|
|
if (*s == '\n')
|
|
cnt++;
|
|
}
|
|
status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
|
|
}
|
|
#endif
|
|
return bias;
|
|
}
|
|
#endif
|
|
|
|
static int file_write(char *fn, char *first, char *last)
|
|
{
|
|
int fd, cnt, charcnt;
|
|
|
|
if (fn == 0) {
|
|
status_line_bold("No current filename");
|
|
return -2;
|
|
}
|
|
// By popular request we do not open file with O_TRUNC,
|
|
// but instead ftruncate() it _after_ successful write.
|
|
// Might reduce amount of data lost on power fail etc.
|
|
fd = open(fn, (O_WRONLY | O_CREAT), 0666);
|
|
if (fd < 0)
|
|
return -1;
|
|
cnt = last - first + 1;
|
|
charcnt = full_write(fd, first, cnt);
|
|
ftruncate(fd, charcnt);
|
|
if (charcnt == cnt) {
|
|
// good write
|
|
//modified_count = FALSE;
|
|
} else {
|
|
charcnt = 0;
|
|
}
|
|
close(fd);
|
|
return charcnt;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
# if ENABLE_FEATURE_VI_REGEX_SEARCH
|
|
// search for pattern starting at p
|
|
static char *char_search(char *p, const char *pat, int dir_and_range)
|
|
{
|
|
struct re_pattern_buffer preg;
|
|
const char *err;
|
|
char *q;
|
|
int i;
|
|
int size;
|
|
int range;
|
|
|
|
re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
|
|
if (ignorecase)
|
|
re_syntax_options = RE_SYNTAX_POSIX_EXTENDED | RE_ICASE;
|
|
|
|
memset(&preg, 0, sizeof(preg));
|
|
err = re_compile_pattern(pat, strlen(pat), &preg);
|
|
if (err != NULL) {
|
|
status_line_bold("bad search pattern '%s': %s", pat, err);
|
|
return p;
|
|
}
|
|
|
|
range = (dir_and_range & 1);
|
|
q = end - 1; // if FULL
|
|
if (range == LIMITED)
|
|
q = next_line(p);
|
|
if (dir_and_range < 0) { // BACK?
|
|
q = text;
|
|
if (range == LIMITED)
|
|
q = prev_line(p);
|
|
}
|
|
|
|
// RANGE could be negative if we are searching backwards
|
|
range = q - p;
|
|
q = p;
|
|
size = range;
|
|
if (range < 0) {
|
|
size = -size;
|
|
q = p - size;
|
|
if (q < text)
|
|
q = text;
|
|
}
|
|
// search for the compiled pattern, preg, in p[]
|
|
// range < 0: search backward
|
|
// range > 0: search forward
|
|
// 0 < start < size
|
|
// re_search() < 0: not found or error
|
|
// re_search() >= 0: index of found pattern
|
|
// struct pattern char int int int struct reg
|
|
// re_search(*pattern_buffer, *string, size, start, range, *regs)
|
|
i = re_search(&preg, q, size, /*start:*/ 0, range, /*struct re_registers*:*/ NULL);
|
|
regfree(&preg);
|
|
if (i < 0)
|
|
return NULL;
|
|
if (dir_and_range > 0) // FORWARD?
|
|
p = p + i;
|
|
else
|
|
p = p - i;
|
|
return p;
|
|
}
|
|
# else
|
|
# if ENABLE_FEATURE_VI_SETOPTS
|
|
static int mycmp(const char *s1, const char *s2, int len)
|
|
{
|
|
if (ignorecase) {
|
|
return strncasecmp(s1, s2, len);
|
|
}
|
|
return strncmp(s1, s2, len);
|
|
}
|
|
# else
|
|
# define mycmp strncmp
|
|
# endif
|
|
static char *char_search(char *p, const char *pat, int dir_and_range)
|
|
{
|
|
char *start, *stop;
|
|
int len;
|
|
int range;
|
|
|
|
len = strlen(pat);
|
|
range = (dir_and_range & 1);
|
|
if (dir_and_range > 0) { //FORWARD?
|
|
stop = end - 1; // assume range is p..end-1
|
|
if (range == LIMITED)
|
|
stop = next_line(p); // range is to next line
|
|
for (start = p; start < stop; start++) {
|
|
if (mycmp(start, pat, len) == 0) {
|
|
return start;
|
|
}
|
|
}
|
|
} else { //BACK
|
|
stop = text; // assume range is text..p
|
|
if (range == LIMITED)
|
|
stop = prev_line(p); // range is to prev line
|
|
for (start = p - len; start >= stop; start--) {
|
|
if (mycmp(start, pat, len) == 0) {
|
|
return start;
|
|
}
|
|
}
|
|
}
|
|
// pattern not found
|
|
return NULL;
|
|
}
|
|
# endif
|
|
#endif /* FEATURE_VI_SEARCH */
|
|
|
|
//----- The Colon commands -------------------------------------
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
static char *get_one_address(char *p, int *addr) // get colon addr, if present
|
|
{
|
|
int st;
|
|
char *q;
|
|
IF_FEATURE_VI_YANKMARK(char c;)
|
|
IF_FEATURE_VI_SEARCH(char *pat;)
|
|
|
|
*addr = -1; // assume no addr
|
|
if (*p == '.') { // the current line
|
|
p++;
|
|
q = begin_line(dot);
|
|
*addr = count_lines(text, q);
|
|
}
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
else if (*p == '\'') { // is this a mark addr
|
|
p++;
|
|
c = tolower(*p);
|
|
p++;
|
|
if (c >= 'a' && c <= 'z') {
|
|
// we have a mark
|
|
c = c - 'a';
|
|
q = mark[(unsigned char) c];
|
|
if (q != NULL) { // is mark valid
|
|
*addr = count_lines(text, q);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
else if (*p == '/') { // a search pattern
|
|
q = strchrnul(++p, '/');
|
|
pat = xstrndup(p, q - p); // save copy of pattern
|
|
p = q;
|
|
if (*p == '/')
|
|
p++;
|
|
q = char_search(dot, pat, (FORWARD << 1) | FULL);
|
|
if (q != NULL) {
|
|
*addr = count_lines(text, q);
|
|
}
|
|
free(pat);
|
|
}
|
|
#endif
|
|
else if (*p == '$') { // the last line in file
|
|
p++;
|
|
q = begin_line(end - 1);
|
|
*addr = count_lines(text, q);
|
|
} else if (isdigit(*p)) { // specific line number
|
|
sscanf(p, "%d%n", addr, &st);
|
|
p += st;
|
|
} else {
|
|
// unrecognized address - assume -1
|
|
*addr = -1;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
|
|
{
|
|
//----- get the address' i.e., 1,3 'a,'b -----
|
|
// get FIRST addr, if present
|
|
while (isblank(*p))
|
|
p++; // skip over leading spaces
|
|
if (*p == '%') { // alias for 1,$
|
|
p++;
|
|
*b = 1;
|
|
*e = count_lines(text, end-1);
|
|
goto ga0;
|
|
}
|
|
p = get_one_address(p, b);
|
|
while (isblank(*p))
|
|
p++;
|
|
if (*p == ',') { // is there a address separator
|
|
p++;
|
|
while (isblank(*p))
|
|
p++;
|
|
// get SECOND addr, if present
|
|
p = get_one_address(p, e);
|
|
}
|
|
ga0:
|
|
while (isblank(*p))
|
|
p++; // skip over trailing spaces
|
|
return p;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
|
|
static void setops(const char *args, const char *opname, int flg_no,
|
|
const char *short_opname, int opt)
|
|
{
|
|
const char *a = args + flg_no;
|
|
int l = strlen(opname) - 1; // opname have + ' '
|
|
|
|
// maybe strncmp? we had tons of erroneous strncasecmp's...
|
|
if (strncasecmp(a, opname, l) == 0
|
|
|| strncasecmp(a, short_opname, 2) == 0
|
|
) {
|
|
if (flg_no)
|
|
vi_setops &= ~opt;
|
|
else
|
|
vi_setops |= opt;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#endif /* FEATURE_VI_COLON */
|
|
|
|
// buf must be no longer than MAX_INPUT_LEN!
|
|
static void colon(char *buf)
|
|
{
|
|
#if !ENABLE_FEATURE_VI_COLON
|
|
// Simple ":cmd" handler with minimal set of commands
|
|
char *p = buf;
|
|
int cnt;
|
|
|
|
if (*p == ':')
|
|
p++;
|
|
cnt = strlen(p);
|
|
if (cnt == 0)
|
|
return;
|
|
if (strncmp(p, "quit", cnt) == 0
|
|
|| strncmp(p, "q!", cnt) == 0
|
|
) {
|
|
if (modified_count && p[1] != '!') {
|
|
status_line_bold("No write since last change (:%s! overrides)", p);
|
|
} else {
|
|
editing = 0;
|
|
}
|
|
return;
|
|
}
|
|
if (strncmp(p, "write", cnt) == 0
|
|
|| strncmp(p, "wq", cnt) == 0
|
|
|| strncmp(p, "wn", cnt) == 0
|
|
|| (p[0] == 'x' && !p[1])
|
|
) {
|
|
if (modified_count != 0 || p[0] != 'x') {
|
|
cnt = file_write(current_filename, text, end - 1);
|
|
}
|
|
if (cnt < 0) {
|
|
if (cnt == -1)
|
|
status_line_bold("Write error: "STRERROR_FMT STRERROR_ERRNO);
|
|
} else {
|
|
modified_count = 0;
|
|
last_modified_count = -1;
|
|
status_line("'%s' %uL, %uC",
|
|
current_filename,
|
|
count_lines(text, end - 1), cnt
|
|
);
|
|
if (p[0] == 'x'
|
|
|| p[1] == 'q' || p[1] == 'n'
|
|
|| p[1] == 'Q' || p[1] == 'N'
|
|
) {
|
|
editing = 0;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
if (strncmp(p, "file", cnt) == 0) {
|
|
last_status_cksum = 0; // force status update
|
|
return;
|
|
}
|
|
if (sscanf(p, "%d", &cnt) > 0) {
|
|
dot = find_line(cnt);
|
|
dot_skip_over_ws();
|
|
return;
|
|
}
|
|
not_implemented(p);
|
|
#else
|
|
|
|
char c, *buf1, *q, *r;
|
|
char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
|
|
int i, l, li, b, e;
|
|
int useforce;
|
|
# if ENABLE_FEATURE_VI_SEARCH || ENABLE_FEATURE_ALLOW_EXEC
|
|
char *orig_buf;
|
|
# endif
|
|
|
|
// :3154 // if (-e line 3154) goto it else stay put
|
|
// :4,33w! foo // write a portion of buffer to file "foo"
|
|
// :w // write all of buffer to current file
|
|
// :q // quit
|
|
// :q! // quit- dont care about modified file
|
|
// :'a,'z!sort -u // filter block through sort
|
|
// :'f // goto mark "f"
|
|
// :'fl // list literal the mark "f" line
|
|
// :.r bar // read file "bar" into buffer before dot
|
|
// :/123/,/abc/d // delete lines from "123" line to "abc" line
|
|
// :/xyz/ // goto the "xyz" line
|
|
// :s/find/replace/ // substitute pattern "find" with "replace"
|
|
// :!<cmd> // run <cmd> then return
|
|
//
|
|
|
|
if (!buf[0])
|
|
goto ret;
|
|
if (*buf == ':')
|
|
buf++; // move past the ':'
|
|
|
|
li = i = 0;
|
|
b = e = -1;
|
|
q = text; // assume 1,$ for the range
|
|
r = end - 1;
|
|
li = count_lines(text, end - 1);
|
|
fn = current_filename;
|
|
|
|
// look for optional address(es) :. :1 :1,9 :'q,'a :%
|
|
buf = get_address(buf, &b, &e);
|
|
|
|
# if ENABLE_FEATURE_VI_SEARCH || ENABLE_FEATURE_ALLOW_EXEC
|
|
// remember orig command line
|
|
orig_buf = buf;
|
|
# endif
|
|
|
|
// get the COMMAND into cmd[]
|
|
buf1 = cmd;
|
|
while (*buf != '\0') {
|
|
if (isspace(*buf))
|
|
break;
|
|
*buf1++ = *buf++;
|
|
}
|
|
*buf1 = '\0';
|
|
// get any ARGuments
|
|
while (isblank(*buf))
|
|
buf++;
|
|
strcpy(args, buf);
|
|
useforce = FALSE;
|
|
buf1 = last_char_is(cmd, '!');
|
|
if (buf1) {
|
|
useforce = TRUE;
|
|
*buf1 = '\0'; // get rid of !
|
|
}
|
|
if (b >= 0) {
|
|
// if there is only one addr, then the addr
|
|
// is the line number of the single line the
|
|
// user wants. So, reset the end
|
|
// pointer to point at end of the "b" line
|
|
q = find_line(b); // what line is #b
|
|
r = end_line(q);
|
|
li = 1;
|
|
}
|
|
if (e >= 0) {
|
|
// we were given two addrs. change the
|
|
// end pointer to the addr given by user.
|
|
r = find_line(e); // what line is #e
|
|
r = end_line(r);
|
|
li = e - b + 1;
|
|
}
|
|
// ------------ now look for the command ------------
|
|
i = strlen(cmd);
|
|
if (i == 0) { // :123CR goto line #123
|
|
if (b >= 0) {
|
|
dot = find_line(b); // what line is #b
|
|
dot_skip_over_ws();
|
|
}
|
|
}
|
|
# if ENABLE_FEATURE_ALLOW_EXEC
|
|
else if (cmd[0] == '!') { // run a cmd
|
|
int retcode;
|
|
// :!ls run the <cmd>
|
|
go_bottom_and_clear_to_eol();
|
|
cookmode();
|
|
retcode = system(orig_buf + 1); // run the cmd
|
|
if (retcode)
|
|
printf("\nshell returned %i\n\n", retcode);
|
|
rawmode();
|
|
Hit_Return(); // let user see results
|
|
}
|
|
# endif
|
|
else if (cmd[0] == '=' && !cmd[1]) { // where is the address
|
|
if (b < 0) { // no addr given- use defaults
|
|
b = e = count_lines(text, dot);
|
|
}
|
|
status_line("%d", b);
|
|
} else if (strncmp(cmd, "delete", i) == 0) { // delete lines
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume .,. for the range
|
|
r = end_line(dot);
|
|
}
|
|
dot = yank_delete(q, r, 1, YANKDEL, ALLOW_UNDO); // save, then delete lines
|
|
dot_skip_over_ws();
|
|
} else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
|
|
int size;
|
|
|
|
// don't edit, if the current file has been modified
|
|
if (modified_count && !useforce) {
|
|
status_line_bold("No write since last change (:%s! overrides)", cmd);
|
|
goto ret;
|
|
}
|
|
if (args[0]) {
|
|
// the user supplied a file name
|
|
fn = args;
|
|
} else if (current_filename && current_filename[0]) {
|
|
// no user supplied name- use the current filename
|
|
// fn = current_filename; was set by default
|
|
} else {
|
|
// no user file name, no current name- punt
|
|
status_line_bold("No current filename");
|
|
goto ret;
|
|
}
|
|
|
|
size = init_text_buffer(fn);
|
|
|
|
# if ENABLE_FEATURE_VI_YANKMARK
|
|
if (Ureg >= 0 && Ureg < 28) {
|
|
free(reg[Ureg]); // free orig line reg- for 'U'
|
|
reg[Ureg] = NULL;
|
|
}
|
|
/*if (YDreg < 28) - always true*/ {
|
|
free(reg[YDreg]); // free default yank/delete register
|
|
reg[YDreg] = NULL;
|
|
}
|
|
# endif
|
|
// how many lines in text[]?
|
|
li = count_lines(text, end - 1);
|
|
status_line("'%s'%s"
|
|
IF_FEATURE_VI_READONLY("%s")
|
|
" %uL, %uC",
|
|
current_filename,
|
|
(size < 0 ? " [New file]" : ""),
|
|
IF_FEATURE_VI_READONLY(
|
|
((readonly_mode) ? " [Readonly]" : ""),
|
|
)
|
|
li, (int)(end - text)
|
|
);
|
|
} else if (strncmp(cmd, "file", i) == 0) { // what File is this
|
|
if (b != -1 || e != -1) {
|
|
status_line_bold("No address allowed on this command");
|
|
goto ret;
|
|
}
|
|
if (args[0]) {
|
|
// user wants a new filename
|
|
free(current_filename);
|
|
current_filename = xstrdup(args);
|
|
} else {
|
|
// user wants file status info
|
|
last_status_cksum = 0; // force status update
|
|
}
|
|
} else if (strncmp(cmd, "features", i) == 0) { // what features are available
|
|
// print out values of all features
|
|
go_bottom_and_clear_to_eol();
|
|
cookmode();
|
|
show_help();
|
|
rawmode();
|
|
Hit_Return();
|
|
} else if (strncmp(cmd, "list", i) == 0) { // literal print line
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume .,. for the range
|
|
r = end_line(dot);
|
|
}
|
|
go_bottom_and_clear_to_eol();
|
|
puts("\r");
|
|
for (; q <= r; q++) {
|
|
int c_is_no_print;
|
|
|
|
c = *q;
|
|
c_is_no_print = (c & 0x80) && !Isprint(c);
|
|
if (c_is_no_print) {
|
|
c = '.';
|
|
standout_start();
|
|
}
|
|
if (c == '\n') {
|
|
write1("$\r");
|
|
} else if (c < ' ' || c == 127) {
|
|
bb_putchar('^');
|
|
if (c == 127)
|
|
c = '?';
|
|
else
|
|
c += '@';
|
|
}
|
|
bb_putchar(c);
|
|
if (c_is_no_print)
|
|
standout_end();
|
|
}
|
|
Hit_Return();
|
|
} else if (strncmp(cmd, "quit", i) == 0 // quit
|
|
|| strncmp(cmd, "next", i) == 0 // edit next file
|
|
|| strncmp(cmd, "prev", i) == 0 // edit previous file
|
|
) {
|
|
int n;
|
|
if (useforce) {
|
|
if (*cmd == 'q') {
|
|
// force end of argv list
|
|
optind = cmdline_filecnt;
|
|
}
|
|
editing = 0;
|
|
goto ret;
|
|
}
|
|
// don't exit if the file been modified
|
|
if (modified_count) {
|
|
status_line_bold("No write since last change (:%s! overrides)", cmd);
|
|
goto ret;
|
|
}
|
|
// are there other file to edit
|
|
n = cmdline_filecnt - optind - 1;
|
|
if (*cmd == 'q' && n > 0) {
|
|
status_line_bold("%u more file(s) to edit", n);
|
|
goto ret;
|
|
}
|
|
if (*cmd == 'n' && n <= 0) {
|
|
status_line_bold("No more files to edit");
|
|
goto ret;
|
|
}
|
|
if (*cmd == 'p') {
|
|
// are there previous files to edit
|
|
if (optind < 1) {
|
|
status_line_bold("No previous files to edit");
|
|
goto ret;
|
|
}
|
|
optind -= 2;
|
|
}
|
|
editing = 0;
|
|
} else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
|
|
int size;
|
|
|
|
fn = args;
|
|
if (!fn[0]) {
|
|
status_line_bold("No filename given");
|
|
goto ret;
|
|
}
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume "dot"
|
|
}
|
|
// read after current line- unless user said ":0r foo"
|
|
if (b != 0) {
|
|
q = next_line(q);
|
|
// read after last line
|
|
if (q == end-1)
|
|
++q;
|
|
}
|
|
{ // dance around potentially-reallocated text[]
|
|
uintptr_t ofs = q - text;
|
|
size = file_insert(fn, q, 0);
|
|
q = text + ofs;
|
|
}
|
|
if (size < 0)
|
|
goto ret; // nothing was inserted
|
|
// how many lines in text[]?
|
|
li = count_lines(q, q + size - 1);
|
|
status_line("'%s'"
|
|
IF_FEATURE_VI_READONLY("%s")
|
|
" %uL, %uC",
|
|
fn,
|
|
IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
|
|
li, size
|
|
);
|
|
if (size > 0) {
|
|
// if the insert is before "dot" then we need to update
|
|
if (q <= dot)
|
|
dot += size;
|
|
}
|
|
} else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
|
|
if (modified_count && !useforce) {
|
|
status_line_bold("No write since last change (:%s! overrides)", cmd);
|
|
} else {
|
|
// reset the filenames to edit
|
|
optind = -1; // start from 0th file
|
|
editing = 0;
|
|
}
|
|
# if ENABLE_FEATURE_VI_SET
|
|
} else if (strncmp(cmd, "set", i) == 0) { // set or clear features
|
|
# if ENABLE_FEATURE_VI_SETOPTS
|
|
char *argp;
|
|
# endif
|
|
i = 0; // offset into args
|
|
// only blank is regarded as args delimiter. What about tab '\t'?
|
|
if (!args[0] || strcasecmp(args, "all") == 0) {
|
|
// print out values of all options
|
|
# if ENABLE_FEATURE_VI_SETOPTS
|
|
status_line_bold(
|
|
"%sautoindent "
|
|
"%sflash "
|
|
"%signorecase "
|
|
"%sshowmatch "
|
|
"tabstop=%u",
|
|
autoindent ? "" : "no",
|
|
err_method ? "" : "no",
|
|
ignorecase ? "" : "no",
|
|
showmatch ? "" : "no",
|
|
tabstop
|
|
);
|
|
# endif
|
|
goto ret;
|
|
}
|
|
# if ENABLE_FEATURE_VI_SETOPTS
|
|
argp = args;
|
|
while (*argp) {
|
|
if (strncmp(argp, "no", 2) == 0)
|
|
i = 2; // ":set noautoindent"
|
|
setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
|
|
setops(argp, "flash " , i, "fl", VI_ERR_METHOD);
|
|
setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
|
|
setops(argp, "showmatch " , i, "sm", VI_SHOWMATCH );
|
|
if (strncmp(argp + i, "tabstop=", 8) == 0) {
|
|
int t = 0;
|
|
sscanf(argp + i+8, "%u", &t);
|
|
if (t > 0 && t <= MAX_TABSTOP)
|
|
tabstop = t;
|
|
}
|
|
argp = skip_non_whitespace(argp);
|
|
argp = skip_whitespace(argp);
|
|
}
|
|
# endif /* FEATURE_VI_SETOPTS */
|
|
# endif /* FEATURE_VI_SET */
|
|
|
|
# if ENABLE_FEATURE_VI_SEARCH
|
|
} else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern
|
|
char *F, *R, *flags;
|
|
size_t len_F, len_R;
|
|
int gflag; // global replace flag
|
|
# if ENABLE_FEATURE_VI_UNDO
|
|
int dont_chain_first_item = ALLOW_UNDO;
|
|
# endif
|
|
|
|
// F points to the "find" pattern
|
|
// R points to the "replace" pattern
|
|
// replace the cmd line delimiters "/" with NULs
|
|
c = orig_buf[1]; // what is the delimiter
|
|
F = orig_buf + 2; // start of "find"
|
|
R = strchr(F, c); // middle delimiter
|
|
if (!R)
|
|
goto colon_s_fail;
|
|
len_F = R - F;
|
|
*R++ = '\0'; // terminate "find"
|
|
flags = strchr(R, c);
|
|
if (!flags)
|
|
goto colon_s_fail;
|
|
len_R = flags - R;
|
|
*flags++ = '\0'; // terminate "replace"
|
|
gflag = *flags;
|
|
|
|
q = begin_line(q);
|
|
if (b < 0) { // maybe :s/foo/bar/
|
|
q = begin_line(dot); // start with cur line
|
|
b = count_lines(text, q); // cur line number
|
|
}
|
|
if (e < 0)
|
|
e = b; // maybe :.s/foo/bar/
|
|
|
|
for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
|
|
char *ls = q; // orig line start
|
|
char *found;
|
|
vc4:
|
|
found = char_search(q, F, (FORWARD << 1) | LIMITED); // search cur line only for "find"
|
|
if (found) {
|
|
uintptr_t bias;
|
|
// we found the "find" pattern - delete it
|
|
// For undo support, the first item should not be chained
|
|
text_hole_delete(found, found + len_F - 1, dont_chain_first_item);
|
|
# if ENABLE_FEATURE_VI_UNDO
|
|
dont_chain_first_item = ALLOW_UNDO_CHAIN;
|
|
# endif
|
|
// insert the "replace" patern
|
|
bias = string_insert(found, R, ALLOW_UNDO_CHAIN);
|
|
found += bias;
|
|
ls += bias;
|
|
//q += bias; - recalculated anyway
|
|
// check for "global" :s/foo/bar/g
|
|
if (gflag == 'g') {
|
|
if ((found + len_R) < end_line(ls)) {
|
|
q = found + len_R;
|
|
goto vc4; // don't let q move past cur line
|
|
}
|
|
}
|
|
}
|
|
q = next_line(ls);
|
|
}
|
|
# endif /* FEATURE_VI_SEARCH */
|
|
} else if (strncmp(cmd, "version", i) == 0) { // show software version
|
|
status_line(BB_VER);
|
|
} else if (strncmp(cmd, "write", i) == 0 // write text to file
|
|
|| strncmp(cmd, "wq", i) == 0
|
|
|| strncmp(cmd, "wn", i) == 0
|
|
|| (cmd[0] == 'x' && !cmd[1])
|
|
) {
|
|
int size;
|
|
//int forced = FALSE;
|
|
|
|
// is there a file name to write to?
|
|
if (args[0]) {
|
|
fn = args;
|
|
}
|
|
# if ENABLE_FEATURE_VI_READONLY
|
|
if (readonly_mode && !useforce) {
|
|
status_line_bold("'%s' is read only", fn);
|
|
goto ret;
|
|
}
|
|
# endif
|
|
//if (useforce) {
|
|
// if "fn" is not write-able, chmod u+w
|
|
// sprintf(syscmd, "chmod u+w %s", fn);
|
|
// system(syscmd);
|
|
// forced = TRUE;
|
|
//}
|
|
if (modified_count != 0 || cmd[0] != 'x') {
|
|
size = r - q + 1;
|
|
l = file_write(fn, q, r);
|
|
} else {
|
|
size = 0;
|
|
l = 0;
|
|
}
|
|
//if (useforce && forced) {
|
|
// chmod u-w
|
|
// sprintf(syscmd, "chmod u-w %s", fn);
|
|
// system(syscmd);
|
|
// forced = FALSE;
|
|
//}
|
|
if (l < 0) {
|
|
if (l == -1)
|
|
status_line_bold_errno(fn);
|
|
} else {
|
|
// how many lines written
|
|
li = count_lines(q, q + l - 1);
|
|
status_line("'%s' %uL, %uC", fn, li, l);
|
|
if (l == size) {
|
|
if (q == text && q + l == end) {
|
|
modified_count = 0;
|
|
last_modified_count = -1;
|
|
}
|
|
if (cmd[0] == 'x'
|
|
|| cmd[1] == 'q' || cmd[1] == 'n'
|
|
|| cmd[1] == 'Q' || cmd[1] == 'N'
|
|
) {
|
|
editing = 0;
|
|
}
|
|
}
|
|
}
|
|
# if ENABLE_FEATURE_VI_YANKMARK
|
|
} else if (strncmp(cmd, "yank", i) == 0) { // yank lines
|
|
if (b < 0) { // no addr given- use defaults
|
|
q = begin_line(dot); // assume .,. for the range
|
|
r = end_line(dot);
|
|
}
|
|
text_yank(q, r, YDreg);
|
|
li = count_lines(q, r);
|
|
status_line("Yank %d lines (%d chars) into [%c]",
|
|
li, strlen(reg[YDreg]), what_reg());
|
|
# endif
|
|
} else {
|
|
// cmd unknown
|
|
not_implemented(cmd);
|
|
}
|
|
ret:
|
|
dot = bound_dot(dot); // make sure "dot" is valid
|
|
return;
|
|
# if ENABLE_FEATURE_VI_SEARCH
|
|
colon_s_fail:
|
|
status_line(":s expression missing delimiters");
|
|
# endif
|
|
#endif /* FEATURE_VI_COLON */
|
|
}
|
|
|
|
//----- Char Routines --------------------------------------------
|
|
// Chars that are part of a word-
|
|
// 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
|
|
// Chars that are Not part of a word (stoppers)
|
|
// !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
|
|
// Chars that are WhiteSpace
|
|
// TAB NEWLINE VT FF RETURN SPACE
|
|
// DO NOT COUNT NEWLINE AS WHITESPACE
|
|
|
|
static int st_test(char *p, int type, int dir, char *tested)
|
|
{
|
|
char c, c0, ci;
|
|
int test, inc;
|
|
|
|
inc = dir;
|
|
c = c0 = p[0];
|
|
ci = p[inc];
|
|
test = 0;
|
|
|
|
if (type == S_BEFORE_WS) {
|
|
c = ci;
|
|
test = (!isspace(c) || c == '\n');
|
|
}
|
|
if (type == S_TO_WS) {
|
|
c = c0;
|
|
test = (!isspace(c) || c == '\n');
|
|
}
|
|
if (type == S_OVER_WS) {
|
|
c = c0;
|
|
test = isspace(c);
|
|
}
|
|
if (type == S_END_PUNCT) {
|
|
c = ci;
|
|
test = ispunct(c);
|
|
}
|
|
if (type == S_END_ALNUM) {
|
|
c = ci;
|
|
test = (isalnum(c) || c == '_');
|
|
}
|
|
*tested = c;
|
|
return test;
|
|
}
|
|
|
|
static char *skip_thing(char *p, int linecnt, int dir, int type)
|
|
{
|
|
char c;
|
|
|
|
while (st_test(p, type, dir, &c)) {
|
|
// make sure we limit search to correct number of lines
|
|
if (c == '\n' && --linecnt < 1)
|
|
break;
|
|
if (dir >= 0 && p >= end - 1)
|
|
break;
|
|
if (dir < 0 && p <= text)
|
|
break;
|
|
p += dir; // move to next char
|
|
}
|
|
return p;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
static void winch_handler(int sig UNUSED_PARAM)
|
|
{
|
|
int save_errno = errno;
|
|
// FIXME: do it in main loop!!!
|
|
signal(SIGWINCH, winch_handler);
|
|
query_screen_dimensions();
|
|
new_screen(rows, columns); // get memory for virtual screen
|
|
redraw(TRUE); // re-draw the screen
|
|
errno = save_errno;
|
|
}
|
|
static void tstp_handler(int sig UNUSED_PARAM)
|
|
{
|
|
int save_errno = errno;
|
|
|
|
// ioctl inside cookmode() was seen to generate SIGTTOU,
|
|
// stopping us too early. Prevent that:
|
|
signal(SIGTTOU, SIG_IGN);
|
|
|
|
go_bottom_and_clear_to_eol();
|
|
cookmode(); // terminal to "cooked"
|
|
|
|
// stop now
|
|
//signal(SIGTSTP, SIG_DFL);
|
|
//raise(SIGTSTP);
|
|
raise(SIGSTOP); // avoid "dance" with TSTP handler - use SIGSTOP instead
|
|
//signal(SIGTSTP, tstp_handler);
|
|
|
|
// we have been "continued" with SIGCONT, restore screen and termios
|
|
rawmode(); // terminal to "raw"
|
|
last_status_cksum = 0; // force status update
|
|
redraw(TRUE); // re-draw the screen
|
|
|
|
errno = save_errno;
|
|
}
|
|
static void int_handler(int sig)
|
|
{
|
|
signal(SIGINT, int_handler);
|
|
siglongjmp(restart, sig);
|
|
}
|
|
#endif /* FEATURE_VI_USE_SIGNALS */
|
|
|
|
static void do_cmd(int c);
|
|
|
|
static int find_range(char **start, char **stop, char c)
|
|
{
|
|
char *save_dot, *p, *q, *t;
|
|
int cnt, multiline = 0, forward;
|
|
|
|
save_dot = dot;
|
|
p = q = dot;
|
|
|
|
// will a 'G' command move forwards or backwards?
|
|
forward = cmdcnt == 0 || cmdcnt > count_lines(text, dot);
|
|
|
|
if (strchr("cdy><", c)) {
|
|
// these cmds operate on whole lines
|
|
p = q = begin_line(p);
|
|
for (cnt = 1; cnt < cmdcnt; cnt++) {
|
|
q = next_line(q);
|
|
}
|
|
q = end_line(q);
|
|
} else if (strchr("^%$0bBeEfth\b\177", c)) {
|
|
// These cmds operate on char positions
|
|
do_cmd(c); // execute movement cmd
|
|
q = dot;
|
|
} else if (strchr("wW", c)) {
|
|
do_cmd(c); // execute movement cmd
|
|
// if we are at the next word's first char
|
|
// step back one char
|
|
// but check the possibilities when it is true
|
|
if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
|
|
|| (ispunct(dot[-1]) && !ispunct(dot[0]))
|
|
|| (isalnum(dot[-1]) && !isalnum(dot[0]))))
|
|
dot--; // move back off of next word
|
|
if (dot > text && *dot == '\n')
|
|
dot--; // stay off NL
|
|
q = dot;
|
|
} else if (strchr("H-k{", c) || (c == 'G' && !forward)) {
|
|
// these operate on multi-lines backwards
|
|
q = end_line(dot); // find NL
|
|
do_cmd(c); // execute movement cmd
|
|
dot_begin();
|
|
p = dot;
|
|
} else if (strchr("L+j}\r\n", c) || (c == 'G' && forward)) {
|
|
// these operate on multi-lines forwards
|
|
p = begin_line(dot);
|
|
do_cmd(c); // execute movement cmd
|
|
dot_end(); // find NL
|
|
q = dot;
|
|
} else {
|
|
// nothing -- this causes any other values of c to
|
|
// represent the one-character range under the
|
|
// cursor. this is correct for ' ' and 'l', but
|
|
// perhaps no others.
|
|
//
|
|
}
|
|
if (q < p) {
|
|
t = q;
|
|
q = p;
|
|
p = t;
|
|
}
|
|
|
|
// backward char movements don't include start position
|
|
if (q > p && strchr("^0bBh\b\177", c)) q--;
|
|
|
|
multiline = 0;
|
|
for (t = p; t <= q; t++) {
|
|
if (*t == '\n') {
|
|
multiline = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*start = p;
|
|
*stop = q;
|
|
dot = save_dot;
|
|
return multiline;
|
|
}
|
|
|
|
//---------------------------------------------------------------------
|
|
//----- the Ascii Chart -----------------------------------------------
|
|
// 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
|
|
// 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
|
|
// 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
|
|
// 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
|
|
// 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
|
|
// 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
|
|
// 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
|
|
// 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
|
|
// 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
|
|
// 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
|
|
// 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
|
|
// 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
|
|
// 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
|
|
// 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
|
|
// 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
|
|
// 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
|
|
//---------------------------------------------------------------------
|
|
|
|
//----- Execute a Vi Command -----------------------------------
|
|
static void do_cmd(int c)
|
|
{
|
|
char *p, *q, *save_dot;
|
|
char buf[12];
|
|
int dir;
|
|
int cnt, i, j;
|
|
int c1;
|
|
|
|
// c1 = c; // quiet the compiler
|
|
// cnt = yf = 0; // quiet the compiler
|
|
// p = q = save_dot = buf; // quiet the compiler
|
|
memset(buf, '\0', sizeof(buf));
|
|
|
|
show_status_line();
|
|
|
|
// if this is a cursor key, skip these checks
|
|
switch (c) {
|
|
case KEYCODE_UP:
|
|
case KEYCODE_DOWN:
|
|
case KEYCODE_LEFT:
|
|
case KEYCODE_RIGHT:
|
|
case KEYCODE_HOME:
|
|
case KEYCODE_END:
|
|
case KEYCODE_PAGEUP:
|
|
case KEYCODE_PAGEDOWN:
|
|
case KEYCODE_DELETE:
|
|
goto key_cmd_mode;
|
|
}
|
|
|
|
if (cmd_mode == 2) {
|
|
// flip-flop Insert/Replace mode
|
|
if (c == KEYCODE_INSERT)
|
|
goto dc_i;
|
|
// we are 'R'eplacing the current *dot with new char
|
|
if (*dot == '\n') {
|
|
// don't Replace past E-o-l
|
|
cmd_mode = 1; // convert to insert
|
|
undo_queue_commit();
|
|
} else {
|
|
if (1 <= c || Isprint(c)) {
|
|
if (c != 27)
|
|
dot = yank_delete(dot, dot, 0, YANKDEL, ALLOW_UNDO); // delete char
|
|
dot = char_insert(dot, c, ALLOW_UNDO_CHAIN); // insert new char
|
|
}
|
|
goto dc1;
|
|
}
|
|
}
|
|
if (cmd_mode == 1) {
|
|
// hitting "Insert" twice means "R" replace mode
|
|
if (c == KEYCODE_INSERT) goto dc5;
|
|
// insert the char c at "dot"
|
|
if (1 <= c || Isprint(c)) {
|
|
dot = char_insert(dot, c, ALLOW_UNDO_QUEUED);
|
|
}
|
|
goto dc1;
|
|
}
|
|
|
|
key_cmd_mode:
|
|
switch (c) {
|
|
//case 0x01: // soh
|
|
//case 0x09: // ht
|
|
//case 0x0b: // vt
|
|
//case 0x0e: // so
|
|
//case 0x0f: // si
|
|
//case 0x10: // dle
|
|
//case 0x11: // dc1
|
|
//case 0x13: // dc3
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
case 0x14: // dc4 ctrl-T
|
|
crashme = (crashme == 0) ? 1 : 0;
|
|
break;
|
|
#endif
|
|
//case 0x16: // syn
|
|
//case 0x17: // etb
|
|
//case 0x18: // can
|
|
//case 0x1c: // fs
|
|
//case 0x1d: // gs
|
|
//case 0x1e: // rs
|
|
//case 0x1f: // us
|
|
//case '!': // !-
|
|
//case '#': // #-
|
|
//case '&': // &-
|
|
//case '(': // (-
|
|
//case ')': // )-
|
|
//case '*': // *-
|
|
//case '=': // =-
|
|
//case '@': // @-
|
|
//case 'F': // F-
|
|
//case 'K': // K-
|
|
//case 'Q': // Q-
|
|
//case 'S': // S-
|
|
//case 'T': // T-
|
|
//case 'V': // V-
|
|
//case '[': // [-
|
|
//case '\\': // \-
|
|
//case ']': // ]-
|
|
//case '_': // _-
|
|
//case '`': // `-
|
|
//case 'v': // v-
|
|
default: // unrecognized command
|
|
buf[0] = c;
|
|
buf[1] = '\0';
|
|
not_implemented(buf);
|
|
end_cmd_q(); // stop adding to q
|
|
case 0x00: // nul- ignore
|
|
break;
|
|
case 2: // ctrl-B scroll up full screen
|
|
case KEYCODE_PAGEUP: // Cursor Key Page Up
|
|
dot_scroll(rows - 2, -1);
|
|
break;
|
|
case 4: // ctrl-D scroll down half screen
|
|
dot_scroll((rows - 2) / 2, 1);
|
|
break;
|
|
case 5: // ctrl-E scroll down one line
|
|
dot_scroll(1, 1);
|
|
break;
|
|
case 6: // ctrl-F scroll down full screen
|
|
case KEYCODE_PAGEDOWN: // Cursor Key Page Down
|
|
dot_scroll(rows - 2, 1);
|
|
break;
|
|
case 7: // ctrl-G show current status
|
|
last_status_cksum = 0; // force status update
|
|
break;
|
|
case 'h': // h- move left
|
|
case KEYCODE_LEFT: // cursor key Left
|
|
case 8: // ctrl-H- move left (This may be ERASE char)
|
|
case 0x7f: // DEL- move left (This may be ERASE char)
|
|
do {
|
|
dot_left();
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case 10: // Newline ^J
|
|
case 'j': // j- goto next line, same col
|
|
case KEYCODE_DOWN: // cursor key Down
|
|
do {
|
|
dot_next(); // go to next B-o-l
|
|
// try stay in same col
|
|
dot = move_to_col(dot, ccol + offset);
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case 12: // ctrl-L force redraw whole screen
|
|
case 18: // ctrl-R force redraw
|
|
redraw(TRUE); // this will redraw the entire display
|
|
break;
|
|
case 13: // Carriage Return ^M
|
|
case '+': // +- goto next line
|
|
do {
|
|
dot_next();
|
|
dot_skip_over_ws();
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case 21: // ctrl-U scroll up half screen
|
|
dot_scroll((rows - 2) / 2, -1);
|
|
break;
|
|
case 25: // ctrl-Y scroll up one line
|
|
dot_scroll(1, -1);
|
|
break;
|
|
case 27: // esc
|
|
if (cmd_mode == 0)
|
|
indicate_error();
|
|
cmd_mode = 0; // stop inserting
|
|
undo_queue_commit();
|
|
end_cmd_q();
|
|
last_status_cksum = 0; // force status update
|
|
break;
|
|
case ' ': // move right
|
|
case 'l': // move right
|
|
case KEYCODE_RIGHT: // Cursor Key Right
|
|
do {
|
|
dot_right();
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
case '"': // "- name a register to use for Delete/Yank
|
|
c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
|
|
if ((unsigned)c1 <= 25) { // a-z?
|
|
YDreg = c1;
|
|
} else {
|
|
indicate_error();
|
|
}
|
|
break;
|
|
case '\'': // '- goto a specific mark
|
|
c1 = (get_one_char() | 0x20);
|
|
if ((unsigned)(c1 - 'a') <= 25) { // a-z?
|
|
c1 = (c1 - 'a');
|
|
// get the b-o-l
|
|
q = mark[c1];
|
|
if (text <= q && q < end) {
|
|
dot = q;
|
|
dot_begin(); // go to B-o-l
|
|
dot_skip_over_ws();
|
|
}
|
|
} else if (c1 == '\'') { // goto previous context
|
|
dot = swap_context(dot); // swap current and previous context
|
|
dot_begin(); // go to B-o-l
|
|
dot_skip_over_ws();
|
|
} else {
|
|
indicate_error();
|
|
}
|
|
break;
|
|
case 'm': // m- Mark a line
|
|
// this is really stupid. If there are any inserts or deletes
|
|
// between text[0] and dot then this mark will not point to the
|
|
// correct location! It could be off by many lines!
|
|
// Well..., at least its quick and dirty.
|
|
c1 = (get_one_char() | 0x20) - 'a';
|
|
if ((unsigned)c1 <= 25) { // a-z?
|
|
// remember the line
|
|
mark[c1] = dot;
|
|
} else {
|
|
indicate_error();
|
|
}
|
|
break;
|
|
case 'P': // P- Put register before
|
|
case 'p': // p- put register after
|
|
p = reg[YDreg];
|
|
if (p == NULL) {
|
|
status_line_bold("Nothing in register %c", what_reg());
|
|
break;
|
|
}
|
|
// are we putting whole lines or strings
|
|
if (strchr(p, '\n') != NULL) {
|
|
if (c == 'P') {
|
|
dot_begin(); // putting lines- Put above
|
|
}
|
|
if (c == 'p') {
|
|
// are we putting after very last line?
|
|
if (end_line(dot) == (end - 1)) {
|
|
dot = end; // force dot to end of text[]
|
|
} else {
|
|
dot_next(); // next line, then put before
|
|
}
|
|
}
|
|
} else {
|
|
if (c == 'p')
|
|
dot_right(); // move to right, can move to NL
|
|
}
|
|
string_insert(dot, p, ALLOW_UNDO); // insert the string
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 'U': // U- Undo; replace current line with original version
|
|
if (reg[Ureg] != NULL) {
|
|
p = begin_line(dot);
|
|
q = end_line(dot);
|
|
p = text_hole_delete(p, q, ALLOW_UNDO); // delete cur line
|
|
p += string_insert(p, reg[Ureg], ALLOW_UNDO_CHAIN); // insert orig line
|
|
dot = p;
|
|
dot_skip_over_ws();
|
|
}
|
|
break;
|
|
#endif /* FEATURE_VI_YANKMARK */
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
case 'u': // u- undo last operation
|
|
undo_pop();
|
|
break;
|
|
#endif
|
|
case '$': // $- goto end of line
|
|
case KEYCODE_END: // Cursor Key End
|
|
for (;;) {
|
|
dot = end_line(dot);
|
|
if (--cmdcnt <= 0)
|
|
break;
|
|
dot_next();
|
|
}
|
|
break;
|
|
case '%': // %- find matching char of pair () [] {}
|
|
for (q = dot; q < end && *q != '\n'; q++) {
|
|
if (strchr("()[]{}", *q) != NULL) {
|
|
// we found half of a pair
|
|
p = find_pair(q, *q);
|
|
if (p == NULL) {
|
|
indicate_error();
|
|
} else {
|
|
dot = p;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (*q == '\n')
|
|
indicate_error();
|
|
break;
|
|
case 'f': // f- forward to a user specified char
|
|
last_forward_char = get_one_char(); // get the search char
|
|
//
|
|
// dont separate these two commands. 'f' depends on ';'
|
|
//
|
|
//**** fall through to ... ';'
|
|
case ';': // ;- look at rest of line for last forward char
|
|
do {
|
|
if (last_forward_char == 0)
|
|
break;
|
|
q = dot + 1;
|
|
while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
|
|
q++;
|
|
}
|
|
if (*q == last_forward_char)
|
|
dot = q;
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case ',': // repeat latest 'f' in opposite direction
|
|
if (last_forward_char == 0)
|
|
break;
|
|
do {
|
|
q = dot - 1;
|
|
while (q >= text && *q != '\n' && *q != last_forward_char) {
|
|
q--;
|
|
}
|
|
if (q >= text && *q == last_forward_char)
|
|
dot = q;
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
|
|
case '-': // -- goto prev line
|
|
do {
|
|
dot_prev();
|
|
dot_skip_over_ws();
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
case '.': // .- repeat the last modifying command
|
|
// Stuff the last_modifying_cmd back into stdin
|
|
// and let it be re-executed.
|
|
if (lmc_len != 0) {
|
|
ioq = ioq_start = xstrndup(last_modifying_cmd, lmc_len);
|
|
}
|
|
break;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_SEARCH
|
|
case '?': // /- search for a pattern
|
|
case '/': // /- search for a pattern
|
|
buf[0] = c;
|
|
buf[1] = '\0';
|
|
q = get_input_line(buf); // get input line- use "status line"
|
|
if (q[0] && !q[1]) {
|
|
if (last_search_pattern[0])
|
|
last_search_pattern[0] = c;
|
|
goto dc3; // if no pat re-use old pat
|
|
}
|
|
if (q[0]) { // strlen(q) > 1: new pat- save it and find
|
|
// there is a new pat
|
|
free(last_search_pattern);
|
|
last_search_pattern = xstrdup(q);
|
|
goto dc3; // now find the pattern
|
|
}
|
|
// user changed mind and erased the "/"- do nothing
|
|
break;
|
|
case 'N': // N- backward search for last pattern
|
|
dir = BACK; // assume BACKWARD search
|
|
p = dot - 1;
|
|
if (last_search_pattern[0] == '?') {
|
|
dir = FORWARD;
|
|
p = dot + 1;
|
|
}
|
|
goto dc4; // now search for pattern
|
|
break;
|
|
case 'n': // n- repeat search for last pattern
|
|
// search rest of text[] starting at next char
|
|
// if search fails return orignal "p" not the "p+1" address
|
|
do {
|
|
const char *msg;
|
|
dc3:
|
|
dir = FORWARD; // assume FORWARD search
|
|
p = dot + 1;
|
|
if (last_search_pattern[0] == '?') {
|
|
dir = BACK;
|
|
p = dot - 1;
|
|
}
|
|
dc4:
|
|
q = char_search(p, last_search_pattern + 1, (dir << 1) | FULL);
|
|
if (q != NULL) {
|
|
dot = q; // good search, update "dot"
|
|
msg = NULL;
|
|
goto dc2;
|
|
}
|
|
// no pattern found between "dot" and "end"- continue at top
|
|
p = text;
|
|
if (dir == BACK) {
|
|
p = end - 1;
|
|
}
|
|
q = char_search(p, last_search_pattern + 1, (dir << 1) | FULL);
|
|
if (q != NULL) { // found something
|
|
dot = q; // found new pattern- goto it
|
|
msg = "search hit BOTTOM, continuing at TOP";
|
|
if (dir == BACK) {
|
|
msg = "search hit TOP, continuing at BOTTOM";
|
|
}
|
|
} else {
|
|
msg = "Pattern not found";
|
|
}
|
|
dc2:
|
|
if (msg)
|
|
status_line_bold("%s", msg);
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case '{': // {- move backward paragraph
|
|
q = char_search(dot, "\n\n", (BACK << 1) | FULL);
|
|
if (q != NULL) { // found blank line
|
|
dot = next_line(q); // move to next blank line
|
|
}
|
|
break;
|
|
case '}': // }- move forward paragraph
|
|
q = char_search(dot, "\n\n", (FORWARD << 1) | FULL);
|
|
if (q != NULL) { // found blank line
|
|
dot = next_line(q); // move to next blank line
|
|
}
|
|
break;
|
|
#endif /* FEATURE_VI_SEARCH */
|
|
case '0': // 0- goto beginning of line
|
|
case '1': // 1-
|
|
case '2': // 2-
|
|
case '3': // 3-
|
|
case '4': // 4-
|
|
case '5': // 5-
|
|
case '6': // 6-
|
|
case '7': // 7-
|
|
case '8': // 8-
|
|
case '9': // 9-
|
|
if (c == '0' && cmdcnt < 1) {
|
|
dot_begin(); // this was a standalone zero
|
|
} else {
|
|
cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
|
|
}
|
|
break;
|
|
case ':': // :- the colon mode commands
|
|
p = get_input_line(":"); // get input line- use "status line"
|
|
colon(p); // execute the command
|
|
break;
|
|
case '<': // <- Left shift something
|
|
case '>': // >- Right shift something
|
|
cnt = count_lines(text, dot); // remember what line we are on
|
|
c1 = get_one_char(); // get the type of thing to delete
|
|
find_range(&p, &q, c1);
|
|
yank_delete(p, q, 1, YANKONLY, NO_UNDO); // save copy before change
|
|
p = begin_line(p);
|
|
q = end_line(q);
|
|
i = count_lines(p, q); // # of lines we are shifting
|
|
for ( ; i > 0; i--, p = next_line(p)) {
|
|
if (c == '<') {
|
|
// shift left- remove tab or 8 spaces
|
|
if (*p == '\t') {
|
|
// shrink buffer 1 char
|
|
text_hole_delete(p, p, NO_UNDO);
|
|
} else if (*p == ' ') {
|
|
// we should be calculating columns, not just SPACE
|
|
for (j = 0; *p == ' ' && j < tabstop; j++) {
|
|
text_hole_delete(p, p, NO_UNDO);
|
|
}
|
|
}
|
|
} else if (c == '>') {
|
|
// shift right -- add tab or 8 spaces
|
|
char_insert(p, '\t', ALLOW_UNDO);
|
|
}
|
|
}
|
|
dot = find_line(cnt); // what line were we on
|
|
dot_skip_over_ws();
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 'A': // A- append at e-o-l
|
|
dot_end(); // go to e-o-l
|
|
//**** fall through to ... 'a'
|
|
case 'a': // a- append after current char
|
|
if (*dot != '\n')
|
|
dot++;
|
|
goto dc_i;
|
|
break;
|
|
case 'B': // B- back a blank-delimited Word
|
|
case 'E': // E- end of a blank-delimited word
|
|
case 'W': // W- forward a blank-delimited word
|
|
dir = FORWARD;
|
|
if (c == 'B')
|
|
dir = BACK;
|
|
do {
|
|
if (c == 'W' || isspace(dot[dir])) {
|
|
dot = skip_thing(dot, 1, dir, S_TO_WS);
|
|
dot = skip_thing(dot, 2, dir, S_OVER_WS);
|
|
}
|
|
if (c != 'W')
|
|
dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case 'C': // C- Change to e-o-l
|
|
case 'D': // D- delete to e-o-l
|
|
save_dot = dot;
|
|
dot = dollar_line(dot); // move to before NL
|
|
// copy text into a register and delete
|
|
dot = yank_delete(save_dot, dot, 0, YANKDEL, ALLOW_UNDO); // delete to e-o-l
|
|
if (c == 'C')
|
|
goto dc_i; // start inserting
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
if (c == 'D')
|
|
end_cmd_q(); // stop adding to q
|
|
#endif
|
|
break;
|
|
case 'g': // 'gg' goto a line number (vim) (default: very first line)
|
|
c1 = get_one_char();
|
|
if (c1 != 'g') {
|
|
buf[0] = 'g';
|
|
// c1 < 0 if the key was special. Try "g<up-arrow>"
|
|
// TODO: if Unicode?
|
|
buf[1] = (c1 >= 0 ? c1 : '*');
|
|
buf[2] = '\0';
|
|
not_implemented(buf);
|
|
break;
|
|
}
|
|
if (cmdcnt == 0)
|
|
cmdcnt = 1;
|
|
// fall through
|
|
case 'G': // G- goto to a line number (default= E-O-F)
|
|
dot = end - 1; // assume E-O-F
|
|
if (cmdcnt > 0) {
|
|
dot = find_line(cmdcnt); // what line is #cmdcnt
|
|
}
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'H': // H- goto top line on screen
|
|
dot = screenbegin;
|
|
if (cmdcnt > (rows - 1)) {
|
|
cmdcnt = (rows - 1);
|
|
}
|
|
if (--cmdcnt > 0) {
|
|
do_cmd('+');
|
|
}
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'I': // I- insert before first non-blank
|
|
dot_begin(); // 0
|
|
dot_skip_over_ws();
|
|
//**** fall through to ... 'i'
|
|
case 'i': // i- insert before current char
|
|
case KEYCODE_INSERT: // Cursor Key Insert
|
|
dc_i:
|
|
cmd_mode = 1; // start inserting
|
|
undo_queue_commit(); // commit queue when cmd_mode changes
|
|
break;
|
|
case 'J': // J- join current and next lines together
|
|
do {
|
|
dot_end(); // move to NL
|
|
if (dot < end - 1) { // make sure not last char in text[]
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
undo_push(dot, 1, UNDO_DEL);
|
|
*dot++ = ' '; // replace NL with space
|
|
undo_push((dot - 1), 1, UNDO_INS_CHAIN);
|
|
#else
|
|
*dot++ = ' ';
|
|
modified_count++;
|
|
#endif
|
|
while (isblank(*dot)) { // delete leading WS
|
|
text_hole_delete(dot, dot, ALLOW_UNDO_CHAIN);
|
|
}
|
|
}
|
|
} while (--cmdcnt > 0);
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 'L': // L- goto bottom line on screen
|
|
dot = end_screen();
|
|
if (cmdcnt > (rows - 1)) {
|
|
cmdcnt = (rows - 1);
|
|
}
|
|
if (--cmdcnt > 0) {
|
|
do_cmd('-');
|
|
}
|
|
dot_begin();
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'M': // M- goto middle line on screen
|
|
dot = screenbegin;
|
|
for (cnt = 0; cnt < (rows-1) / 2; cnt++)
|
|
dot = next_line(dot);
|
|
break;
|
|
case 'O': // O- open a empty line above
|
|
// 0i\n ESC -i
|
|
p = begin_line(dot);
|
|
if (p[-1] == '\n') {
|
|
dot_prev();
|
|
case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
|
|
dot_end();
|
|
dot = char_insert(dot, '\n', ALLOW_UNDO);
|
|
} else {
|
|
dot_begin(); // 0
|
|
dot = char_insert(dot, '\n', ALLOW_UNDO); // i\n ESC
|
|
dot_prev(); // -
|
|
}
|
|
goto dc_i;
|
|
break;
|
|
case 'R': // R- continuous Replace char
|
|
dc5:
|
|
cmd_mode = 2;
|
|
undo_queue_commit();
|
|
break;
|
|
case KEYCODE_DELETE:
|
|
if (dot < end - 1)
|
|
dot = yank_delete(dot, dot, 1, YANKDEL, ALLOW_UNDO);
|
|
break;
|
|
case 'X': // X- delete char before dot
|
|
case 'x': // x- delete the current char
|
|
case 's': // s- substitute the current char
|
|
dir = 0;
|
|
if (c == 'X')
|
|
dir = -1;
|
|
do {
|
|
if (dot[dir] != '\n') {
|
|
if (c == 'X')
|
|
dot--; // delete prev char
|
|
dot = yank_delete(dot, dot, 0, YANKDEL, ALLOW_UNDO); // delete char
|
|
}
|
|
} while (--cmdcnt > 0);
|
|
end_cmd_q(); // stop adding to q
|
|
if (c == 's')
|
|
goto dc_i; // start inserting
|
|
break;
|
|
case 'Z': // Z- if modified, {write}; exit
|
|
// ZZ means to save file (if necessary), then exit
|
|
c1 = get_one_char();
|
|
if (c1 != 'Z') {
|
|
indicate_error();
|
|
break;
|
|
}
|
|
if (modified_count) {
|
|
if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
|
|
status_line_bold("'%s' is read only", current_filename);
|
|
break;
|
|
}
|
|
cnt = file_write(current_filename, text, end - 1);
|
|
if (cnt < 0) {
|
|
if (cnt == -1)
|
|
status_line_bold("Write error: "STRERROR_FMT STRERROR_ERRNO);
|
|
} else if (cnt == (end - 1 - text + 1)) {
|
|
editing = 0;
|
|
}
|
|
} else {
|
|
editing = 0;
|
|
}
|
|
break;
|
|
case '^': // ^- move to first non-blank on line
|
|
dot_begin();
|
|
dot_skip_over_ws();
|
|
break;
|
|
case 'b': // b- back a word
|
|
case 'e': // e- end of word
|
|
dir = FORWARD;
|
|
if (c == 'b')
|
|
dir = BACK;
|
|
do {
|
|
if ((dot + dir) < text || (dot + dir) > end - 1)
|
|
break;
|
|
dot += dir;
|
|
if (isspace(*dot)) {
|
|
dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
|
|
}
|
|
if (isalnum(*dot) || *dot == '_') {
|
|
dot = skip_thing(dot, 1, dir, S_END_ALNUM);
|
|
} else if (ispunct(*dot)) {
|
|
dot = skip_thing(dot, 1, dir, S_END_PUNCT);
|
|
}
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case 'c': // c- change something
|
|
case 'd': // d- delete something
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
case 'y': // y- yank something
|
|
case 'Y': // Y- Yank a line
|
|
#endif
|
|
{
|
|
int yf, ml, whole = 0;
|
|
yf = YANKDEL; // assume either "c" or "d"
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
if (c == 'y' || c == 'Y')
|
|
yf = YANKONLY;
|
|
#endif
|
|
c1 = 'y';
|
|
if (c != 'Y')
|
|
c1 = get_one_char(); // get the type of thing to delete
|
|
// determine range, and whether it spans lines
|
|
ml = find_range(&p, &q, c1);
|
|
place_cursor(0, 0);
|
|
if (c1 == 27) { // ESC- user changed mind and wants out
|
|
c = c1 = 27; // Escape- do nothing
|
|
} else if (strchr("wW", c1)) {
|
|
ml = 0; // multi-line ranges aren't allowed for words
|
|
if (c == 'c') {
|
|
// don't include trailing WS as part of word
|
|
while (isspace(*q) && q > p) {
|
|
q--;
|
|
}
|
|
}
|
|
dot = yank_delete(p, q, ml, yf, ALLOW_UNDO); // delete word
|
|
} else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
|
|
// partial line copy text into a register and delete
|
|
dot = yank_delete(p, q, ml, yf, ALLOW_UNDO); // delete word
|
|
} else if (strchr("cdykjGHL+-{}\r\n", c1)) {
|
|
// whole line copy text into a register and delete
|
|
dot = yank_delete(p, q, ml, yf, ALLOW_UNDO); // delete lines
|
|
whole = 1;
|
|
} else {
|
|
// could not recognize object
|
|
c = c1 = 27; // error-
|
|
ml = 0;
|
|
indicate_error();
|
|
}
|
|
if (ml && whole) {
|
|
if (c == 'c') {
|
|
dot = char_insert(dot, '\n', ALLOW_UNDO_CHAIN);
|
|
// on the last line of file don't move to prev line
|
|
if (whole && dot != (end-1)) {
|
|
dot_prev();
|
|
}
|
|
} else if (c == 'd') {
|
|
dot_begin();
|
|
dot_skip_over_ws();
|
|
}
|
|
}
|
|
if (c1 != 27) {
|
|
// if CHANGING, not deleting, start inserting after the delete
|
|
if (c == 'c') {
|
|
strcpy(buf, "Change");
|
|
goto dc_i; // start inserting
|
|
}
|
|
if (c == 'd') {
|
|
strcpy(buf, "Delete");
|
|
}
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
if (c == 'y' || c == 'Y') {
|
|
strcpy(buf, "Yank");
|
|
}
|
|
p = reg[YDreg];
|
|
q = p + strlen(p);
|
|
for (cnt = 0; p <= q; p++) {
|
|
if (*p == '\n')
|
|
cnt++;
|
|
}
|
|
status_line("%s %u lines (%u chars) using [%c]",
|
|
buf, cnt, (unsigned)strlen(reg[YDreg]), what_reg());
|
|
#endif
|
|
end_cmd_q(); // stop adding to q
|
|
}
|
|
break;
|
|
}
|
|
case 'k': // k- goto prev line, same col
|
|
case KEYCODE_UP: // cursor key Up
|
|
do {
|
|
dot_prev();
|
|
dot = move_to_col(dot, ccol + offset); // try stay in same col
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case 'r': // r- replace the current char with user input
|
|
c1 = get_one_char(); // get the replacement char
|
|
if (*dot != '\n') {
|
|
dot = text_hole_delete(dot, dot, ALLOW_UNDO);
|
|
dot = char_insert(dot, c1, ALLOW_UNDO_CHAIN);
|
|
dot_left();
|
|
}
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
case 't': // t- move to char prior to next x
|
|
last_forward_char = get_one_char();
|
|
do_cmd(';');
|
|
if (*dot == last_forward_char)
|
|
dot_left();
|
|
last_forward_char = 0;
|
|
break;
|
|
case 'w': // w- forward a word
|
|
do {
|
|
if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
|
|
dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
|
|
} else if (ispunct(*dot)) { // we are on PUNCT
|
|
dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
|
|
}
|
|
if (dot < end - 1)
|
|
dot++; // move over word
|
|
if (isspace(*dot)) {
|
|
dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
|
|
}
|
|
} while (--cmdcnt > 0);
|
|
break;
|
|
case 'z': // z-
|
|
c1 = get_one_char(); // get the replacement char
|
|
cnt = 0;
|
|
if (c1 == '.')
|
|
cnt = (rows - 2) / 2; // put dot at center
|
|
if (c1 == '-')
|
|
cnt = rows - 2; // put dot at bottom
|
|
screenbegin = begin_line(dot); // start dot at top
|
|
dot_scroll(cnt, -1);
|
|
break;
|
|
case '|': // |- move to column "cmdcnt"
|
|
dot = move_to_col(dot, cmdcnt - 1); // try to move to column
|
|
break;
|
|
case '~': // ~- flip the case of letters a-z -> A-Z
|
|
do {
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
if (islower(*dot)) {
|
|
undo_push(dot, 1, UNDO_DEL);
|
|
*dot = toupper(*dot);
|
|
undo_push(dot, 1, UNDO_INS_CHAIN);
|
|
} else if (isupper(*dot)) {
|
|
undo_push(dot, 1, UNDO_DEL);
|
|
*dot = tolower(*dot);
|
|
undo_push(dot, 1, UNDO_INS_CHAIN);
|
|
}
|
|
#else
|
|
if (islower(*dot)) {
|
|
*dot = toupper(*dot);
|
|
modified_count++;
|
|
} else if (isupper(*dot)) {
|
|
*dot = tolower(*dot);
|
|
modified_count++;
|
|
}
|
|
#endif
|
|
dot_right();
|
|
} while (--cmdcnt > 0);
|
|
end_cmd_q(); // stop adding to q
|
|
break;
|
|
//----- The Cursor and Function Keys -----------------------------
|
|
case KEYCODE_HOME: // Cursor Key Home
|
|
dot_begin();
|
|
break;
|
|
// The Fn keys could point to do_macro which could translate them
|
|
#if 0
|
|
case KEYCODE_FUN1: // Function Key F1
|
|
case KEYCODE_FUN2: // Function Key F2
|
|
case KEYCODE_FUN3: // Function Key F3
|
|
case KEYCODE_FUN4: // Function Key F4
|
|
case KEYCODE_FUN5: // Function Key F5
|
|
case KEYCODE_FUN6: // Function Key F6
|
|
case KEYCODE_FUN7: // Function Key F7
|
|
case KEYCODE_FUN8: // Function Key F8
|
|
case KEYCODE_FUN9: // Function Key F9
|
|
case KEYCODE_FUN10: // Function Key F10
|
|
case KEYCODE_FUN11: // Function Key F11
|
|
case KEYCODE_FUN12: // Function Key F12
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
dc1:
|
|
// if text[] just became empty, add back an empty line
|
|
if (end == text) {
|
|
char_insert(text, '\n', NO_UNDO); // start empty buf with dummy line
|
|
dot = text;
|
|
}
|
|
// it is OK for dot to exactly equal to end, otherwise check dot validity
|
|
if (dot != end) {
|
|
dot = bound_dot(dot); // make sure "dot" is valid
|
|
}
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
check_context(c); // update the current context
|
|
#endif
|
|
|
|
if (!isdigit(c))
|
|
cmdcnt = 0; // cmd was not a number, reset cmdcnt
|
|
cnt = dot - begin_line(dot);
|
|
// Try to stay off of the Newline
|
|
if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
|
|
dot--;
|
|
}
|
|
|
|
// NB! the CRASHME code is unmaintained, and doesn't currently build
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
static int totalcmds = 0;
|
|
static int Mp = 85; // Movement command Probability
|
|
static int Np = 90; // Non-movement command Probability
|
|
static int Dp = 96; // Delete command Probability
|
|
static int Ip = 97; // Insert command Probability
|
|
static int Yp = 98; // Yank command Probability
|
|
static int Pp = 99; // Put command Probability
|
|
static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
|
|
static const char chars[20] = "\t012345 abcdABCD-=.$";
|
|
static const char *const words[20] = {
|
|
"this", "is", "a", "test",
|
|
"broadcast", "the", "emergency", "of",
|
|
"system", "quick", "brown", "fox",
|
|
"jumped", "over", "lazy", "dogs",
|
|
"back", "January", "Febuary", "March"
|
|
};
|
|
static const char *const lines[20] = {
|
|
"You should have received a copy of the GNU General Public License\n",
|
|
"char c, cm, *cmd, *cmd1;\n",
|
|
"generate a command by percentages\n",
|
|
"Numbers may be typed as a prefix to some commands.\n",
|
|
"Quit, discarding changes!\n",
|
|
"Forced write, if permission originally not valid.\n",
|
|
"In general, any ex or ed command (such as substitute or delete).\n",
|
|
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
|
|
"Please get w/ me and I will go over it with you.\n",
|
|
"The following is a list of scheduled, committed changes.\n",
|
|
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
|
|
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
|
|
"Any question about transactions please contact Sterling Huxley.\n",
|
|
"I will try to get back to you by Friday, December 31.\n",
|
|
"This Change will be implemented on Friday.\n",
|
|
"Let me know if you have problems accessing this;\n",
|
|
"Sterling Huxley recently added you to the access list.\n",
|
|
"Would you like to go to lunch?\n",
|
|
"The last command will be automatically run.\n",
|
|
"This is too much english for a computer geek.\n",
|
|
};
|
|
static char *multilines[20] = {
|
|
"You should have received a copy of the GNU General Public License\n",
|
|
"char c, cm, *cmd, *cmd1;\n",
|
|
"generate a command by percentages\n",
|
|
"Numbers may be typed as a prefix to some commands.\n",
|
|
"Quit, discarding changes!\n",
|
|
"Forced write, if permission originally not valid.\n",
|
|
"In general, any ex or ed command (such as substitute or delete).\n",
|
|
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
|
|
"Please get w/ me and I will go over it with you.\n",
|
|
"The following is a list of scheduled, committed changes.\n",
|
|
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
|
|
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
|
|
"Any question about transactions please contact Sterling Huxley.\n",
|
|
"I will try to get back to you by Friday, December 31.\n",
|
|
"This Change will be implemented on Friday.\n",
|
|
"Let me know if you have problems accessing this;\n",
|
|
"Sterling Huxley recently added you to the access list.\n",
|
|
"Would you like to go to lunch?\n",
|
|
"The last command will be automatically run.\n",
|
|
"This is too much english for a computer geek.\n",
|
|
};
|
|
|
|
// create a random command to execute
|
|
static void crash_dummy()
|
|
{
|
|
static int sleeptime; // how long to pause between commands
|
|
char c, cm, *cmd, *cmd1;
|
|
int i, cnt, thing, rbi, startrbi, percent;
|
|
|
|
// "dot" movement commands
|
|
cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
|
|
|
|
// is there already a command running?
|
|
if (readbuffer[0] > 0)
|
|
goto cd1;
|
|
cd0:
|
|
readbuffer[0] = 'X';
|
|
startrbi = rbi = 1;
|
|
sleeptime = 0; // how long to pause between commands
|
|
memset(readbuffer, '\0', sizeof(readbuffer));
|
|
// generate a command by percentages
|
|
percent = (int) lrand48() % 100; // get a number from 0-99
|
|
if (percent < Mp) { // Movement commands
|
|
// available commands
|
|
cmd = cmd1;
|
|
M++;
|
|
} else if (percent < Np) { // non-movement commands
|
|
cmd = "mz<>\'\""; // available commands
|
|
N++;
|
|
} else if (percent < Dp) { // Delete commands
|
|
cmd = "dx"; // available commands
|
|
D++;
|
|
} else if (percent < Ip) { // Inset commands
|
|
cmd = "iIaAsrJ"; // available commands
|
|
I++;
|
|
} else if (percent < Yp) { // Yank commands
|
|
cmd = "yY"; // available commands
|
|
Y++;
|
|
} else if (percent < Pp) { // Put commands
|
|
cmd = "pP"; // available commands
|
|
P++;
|
|
} else {
|
|
// We do not know how to handle this command, try again
|
|
U++;
|
|
goto cd0;
|
|
}
|
|
// randomly pick one of the available cmds from "cmd[]"
|
|
i = (int) lrand48() % strlen(cmd);
|
|
cm = cmd[i];
|
|
if (strchr(":\024", cm))
|
|
goto cd0; // dont allow colon or ctrl-T commands
|
|
readbuffer[rbi++] = cm; // put cmd into input buffer
|
|
|
|
// now we have the command-
|
|
// there are 1, 2, and multi char commands
|
|
// find out which and generate the rest of command as necessary
|
|
if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
|
|
cmd1 = " \n\r0$^-+wWeEbBhjklHL";
|
|
if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
|
|
cmd1 = "abcdefghijklmnopqrstuvwxyz";
|
|
}
|
|
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
|
|
c = cmd1[thing];
|
|
readbuffer[rbi++] = c; // add movement to input buffer
|
|
}
|
|
if (strchr("iIaAsc", cm)) { // multi-char commands
|
|
if (cm == 'c') {
|
|
// change some thing
|
|
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
|
|
c = cmd1[thing];
|
|
readbuffer[rbi++] = c; // add movement to input buffer
|
|
}
|
|
thing = (int) lrand48() % 4; // what thing to insert
|
|
cnt = (int) lrand48() % 10; // how many to insert
|
|
for (i = 0; i < cnt; i++) {
|
|
if (thing == 0) { // insert chars
|
|
readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
|
|
} else if (thing == 1) { // insert words
|
|
strcat(readbuffer, words[(int) lrand48() % 20]);
|
|
strcat(readbuffer, " ");
|
|
sleeptime = 0; // how fast to type
|
|
} else if (thing == 2) { // insert lines
|
|
strcat(readbuffer, lines[(int) lrand48() % 20]);
|
|
sleeptime = 0; // how fast to type
|
|
} else { // insert multi-lines
|
|
strcat(readbuffer, multilines[(int) lrand48() % 20]);
|
|
sleeptime = 0; // how fast to type
|
|
}
|
|
}
|
|
strcat(readbuffer, ESC);
|
|
}
|
|
readbuffer[0] = strlen(readbuffer + 1);
|
|
cd1:
|
|
totalcmds++;
|
|
if (sleeptime > 0)
|
|
mysleep(sleeptime); // sleep 1/100 sec
|
|
}
|
|
|
|
// test to see if there are any errors
|
|
static void crash_test()
|
|
{
|
|
static time_t oldtim;
|
|
|
|
time_t tim;
|
|
char d[2], msg[80];
|
|
|
|
msg[0] = '\0';
|
|
if (end < text) {
|
|
strcat(msg, "end<text ");
|
|
}
|
|
if (end > textend) {
|
|
strcat(msg, "end>textend ");
|
|
}
|
|
if (dot < text) {
|
|
strcat(msg, "dot<text ");
|
|
}
|
|
if (dot > end) {
|
|
strcat(msg, "dot>end ");
|
|
}
|
|
if (screenbegin < text) {
|
|
strcat(msg, "screenbegin<text ");
|
|
}
|
|
if (screenbegin > end - 1) {
|
|
strcat(msg, "screenbegin>end-1 ");
|
|
}
|
|
|
|
if (msg[0]) {
|
|
printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
|
|
totalcmds, last_input_char, msg, ESC_BOLD_TEXT, ESC_NORM_TEXT);
|
|
fflush_all();
|
|
while (safe_read(STDIN_FILENO, d, 1) > 0) {
|
|
if (d[0] == '\n' || d[0] == '\r')
|
|
break;
|
|
}
|
|
}
|
|
tim = time(NULL);
|
|
if (tim >= (oldtim + 3)) {
|
|
sprintf(status_buffer,
|
|
"Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
|
|
totalcmds, M, N, I, D, Y, P, U, end - text + 1);
|
|
oldtim = tim;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void edit_file(char *fn)
|
|
{
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
#define cur_line edit_file__cur_line
|
|
#endif
|
|
int c;
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
int sig;
|
|
#endif
|
|
|
|
editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
|
|
rawmode();
|
|
rows = 24;
|
|
columns = 80;
|
|
IF_FEATURE_VI_ASK_TERMINAL(G.get_rowcol_error =) query_screen_dimensions();
|
|
#if ENABLE_FEATURE_VI_ASK_TERMINAL
|
|
if (G.get_rowcol_error /* TODO? && no input on stdin */) {
|
|
uint64_t k;
|
|
write1(ESC"[999;999H" ESC"[6n");
|
|
fflush_all();
|
|
k = read_key(STDIN_FILENO, readbuffer, /*timeout_ms:*/ 100);
|
|
if ((int32_t)k == KEYCODE_CURSOR_POS) {
|
|
uint32_t rc = (k >> 32);
|
|
columns = (rc & 0x7fff);
|
|
if (columns > MAX_SCR_COLS)
|
|
columns = MAX_SCR_COLS;
|
|
rows = ((rc >> 16) & 0x7fff);
|
|
if (rows > MAX_SCR_ROWS)
|
|
rows = MAX_SCR_ROWS;
|
|
}
|
|
}
|
|
#endif
|
|
new_screen(rows, columns); // get memory for virtual screen
|
|
init_text_buffer(fn);
|
|
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
YDreg = 26; // default Yank/Delete reg
|
|
// Ureg = 27; - const // hold orig line for "U" cmd
|
|
mark[26] = mark[27] = text; // init "previous context"
|
|
#endif
|
|
|
|
last_forward_char = '\0';
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
last_input_char = '\0';
|
|
#endif
|
|
crow = 0;
|
|
ccol = 0;
|
|
|
|
#if ENABLE_FEATURE_VI_USE_SIGNALS
|
|
signal(SIGWINCH, winch_handler);
|
|
signal(SIGTSTP, tstp_handler);
|
|
sig = sigsetjmp(restart, 1);
|
|
if (sig != 0) {
|
|
screenbegin = dot = text;
|
|
}
|
|
// int_handler() can jump to "restart",
|
|
// must install handler *after* initializing "restart"
|
|
signal(SIGINT, int_handler);
|
|
#endif
|
|
|
|
cmd_mode = 0; // 0=command 1=insert 2='R'eplace
|
|
cmdcnt = 0;
|
|
tabstop = 8;
|
|
offset = 0; // no horizontal offset
|
|
c = '\0';
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
free(ioq_start);
|
|
ioq_start = NULL;
|
|
lmc_len = 0;
|
|
adding2q = 0;
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
{
|
|
char *p, *q;
|
|
int n = 0;
|
|
|
|
while ((p = initial_cmds[n]) != NULL) {
|
|
do {
|
|
q = p;
|
|
p = strchr(q, '\n');
|
|
if (p)
|
|
while (*p == '\n')
|
|
*p++ = '\0';
|
|
if (*q)
|
|
colon(q);
|
|
} while (p);
|
|
free(initial_cmds[n]);
|
|
initial_cmds[n] = NULL;
|
|
n++;
|
|
}
|
|
}
|
|
#endif
|
|
redraw(FALSE); // dont force every col re-draw
|
|
//------This is the main Vi cmd handling loop -----------------------
|
|
while (editing > 0) {
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
if (crashme > 0) {
|
|
if ((end - text) > 1) {
|
|
crash_dummy(); // generate a random command
|
|
} else {
|
|
crashme = 0;
|
|
string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n", NO_UNDO);
|
|
dot = text;
|
|
refresh(FALSE);
|
|
}
|
|
}
|
|
#endif
|
|
c = get_one_char(); // get a cmd from user
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
last_input_char = c;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_YANKMARK
|
|
// save a copy of the current line- for the 'U" command
|
|
if (begin_line(dot) != cur_line) {
|
|
cur_line = begin_line(dot);
|
|
text_yank(begin_line(dot), end_line(dot), Ureg);
|
|
}
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_DOT_CMD
|
|
// If c is a command that changes text[],
|
|
// (re)start remembering the input for the "." command.
|
|
if (!adding2q
|
|
&& ioq_start == NULL
|
|
&& cmd_mode == 0 // command mode
|
|
&& c > '\0' // exclude NUL and non-ASCII chars
|
|
&& c < 0x7f // (Unicode and such)
|
|
&& strchr(modifying_cmds, c)
|
|
) {
|
|
start_new_cmd_q(c);
|
|
}
|
|
#endif
|
|
do_cmd(c); // execute the user command
|
|
|
|
// poll to see if there is input already waiting. if we are
|
|
// not able to display output fast enough to keep up, skip
|
|
// the display update until we catch up with input.
|
|
if (!readbuffer[0] && mysleep(0) == 0) {
|
|
// no input pending - so update output
|
|
refresh(FALSE);
|
|
show_status_line();
|
|
}
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
if (crashme > 0)
|
|
crash_test(); // test editor variables
|
|
#endif
|
|
}
|
|
//-------------------------------------------------------------------
|
|
|
|
go_bottom_and_clear_to_eol();
|
|
cookmode();
|
|
#undef cur_line
|
|
}
|
|
|
|
int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int vi_main(int argc, char **argv)
|
|
{
|
|
int c;
|
|
|
|
INIT_G();
|
|
|
|
#if ENABLE_FEATURE_VI_UNDO
|
|
//undo_stack_tail = NULL; - already is
|
|
# if ENABLE_FEATURE_VI_UNDO_QUEUE
|
|
undo_queue_state = UNDO_EMPTY;
|
|
//undo_q = 0; - already is
|
|
# endif
|
|
#endif
|
|
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
srand((long) getpid());
|
|
#endif
|
|
#ifdef NO_SUCH_APPLET_YET
|
|
// if we aren't "vi", we are "view"
|
|
if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
|
|
SET_READONLY_MODE(readonly_mode);
|
|
}
|
|
#endif
|
|
|
|
// autoindent is not default in vim 7.3
|
|
vi_setops = /*VI_AUTOINDENT |*/ VI_SHOWMATCH | VI_IGNORECASE;
|
|
// 1- process $HOME/.exrc file (not inplemented yet)
|
|
// 2- process EXINIT variable from environment
|
|
// 3- process command line args
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
{
|
|
char *p = getenv("EXINIT");
|
|
if (p && *p)
|
|
initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
|
|
}
|
|
#endif
|
|
while ((c = getopt(argc, argv, "hCRH" IF_FEATURE_VI_COLON("c:"))) != -1) {
|
|
switch (c) {
|
|
#if ENABLE_FEATURE_VI_CRASHME
|
|
case 'C':
|
|
crashme = 1;
|
|
break;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_READONLY
|
|
case 'R': // Read-only flag
|
|
SET_READONLY_MODE(readonly_mode);
|
|
break;
|
|
#endif
|
|
#if ENABLE_FEATURE_VI_COLON
|
|
case 'c': // cmd line vi command
|
|
if (*optarg)
|
|
initial_cmds[initial_cmds[0] != NULL] = xstrndup(optarg, MAX_INPUT_LEN);
|
|
break;
|
|
#endif
|
|
case 'H':
|
|
show_help();
|
|
// fall through
|
|
default:
|
|
bb_show_usage();
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
argv += optind;
|
|
cmdline_filecnt = argc - optind;
|
|
|
|
// "Save cursor, use alternate screen buffer, clear screen"
|
|
write1(ESC"[?1049h");
|
|
// This is the main file handling loop
|
|
optind = 0;
|
|
while (1) {
|
|
edit_file(argv[optind]); // might be NULL on 1st iteration
|
|
// NB: optind can be changed by ":next" and ":rewind" commands
|
|
optind++;
|
|
if (optind >= cmdline_filecnt)
|
|
break;
|
|
}
|
|
// "Use normal screen buffer, restore cursor"
|
|
write1(ESC"[?1049l");
|
|
|
|
return 0;
|
|
}
|