diff options
Diffstat (limited to 'editors/vi.c')
| -rw-r--r-- | editors/vi.c | 221 |
1 files changed, 181 insertions, 40 deletions
diff --git a/editors/vi.c b/editors/vi.c index 3656fee..3f4ccdc 100644 --- a/editors/vi.c +++ b/editors/vi.c @@ -21,6 +21,134 @@ * An "ex" line oriented mode- maybe using "cmdedit" */ +//config:config VI +//config: bool "vi" +//config: default y +//config: help +//config: 'vi' is a text editor. More specifically, it is the One True +//config: text editor <grin>. It does, however, have a rather steep +//config: learning curve. If you are not already comfortable with 'vi' +//config: you may wish to use something else. +//config: +//config:config FEATURE_VI_MAX_LEN +//config: int "Maximum screen width in vi" +//config: range 256 16384 +//config: default 4096 +//config: depends on VI +//config: help +//config: Contrary to what you may think, this is not eating much. +//config: Make it smaller than 4k only if you are very limited on memory. +//config: +//config:config FEATURE_VI_8BIT +//config: bool "Allow vi to display 8-bit chars (otherwise shows dots)" +//config: default n +//config: depends on VI +//config: help +//config: If your terminal can display characters with high bit set, +//config: you may want to enable this. Note: vi is not Unicode-capable. +//config: If your terminal combines several 8-bit bytes into one character +//config: (as in Unicode mode), this will not work properly. +//config: +//config:config FEATURE_VI_COLON +//config: bool "Enable \":\" colon commands (no \"ex\" mode)" +//config: default y +//config: depends on VI +//config: help +//config: Enable a limited set of colon commands for vi. This does not +//config: provide an "ex" mode. +//config: +//config:config FEATURE_VI_YANKMARK +//config: bool "Enable yank/put commands and mark cmds" +//config: default y +//config: depends on VI +//config: help +//config: This will enable you to use yank and put, as well as mark in +//config: busybox vi. +//config: +//config:config FEATURE_VI_SEARCH +//config: bool "Enable search and replace cmds" +//config: default y +//config: depends on VI +//config: help +//config: Select this if you wish to be able to do search and replace in +//config: busybox vi. +//config: +//config:config FEATURE_VI_REGEX_SEARCH +//config: bool "Enable regex in search and replace" +//config: default n # Uses GNU regex, which may be unavailable. FIXME +//config: depends on FEATURE_VI_SEARCH +//config: help +//config: Use extended regex search. +//config: +//config:config FEATURE_VI_USE_SIGNALS +//config: bool "Catch signals" +//config: default y +//config: depends on VI +//config: help +//config: Selecting this option will make busybox vi signal aware. This will +//config: make busybox vi support SIGWINCH to deal with Window Changes, catch +//config: Ctrl-Z and Ctrl-C and alarms. +//config: +//config:config FEATURE_VI_DOT_CMD +//config: bool "Remember previous cmd and \".\" cmd" +//config: default y +//config: depends on VI +//config: help +//config: Make busybox vi remember the last command and be able to repeat it. +//config: +//config:config FEATURE_VI_READONLY +//config: bool "Enable -R option and \"view\" mode" +//config: default y +//config: depends on VI +//config: help +//config: Enable the read-only command line option, which allows the user to +//config: open a file in read-only mode. +//config: +//config:config FEATURE_VI_SETOPTS +//config: bool "Enable set-able options, ai ic showmatch" +//config: default y +//config: depends on VI +//config: help +//config: Enable the editor to set some (ai, ic, showmatch) options. +//config: +//config:config FEATURE_VI_SET +//config: bool "Support for :set" +//config: default y +//config: depends on VI +//config: help +//config: Support for ":set". +//config: +//config:config FEATURE_VI_WIN_RESIZE +//config: bool "Handle window resize" +//config: default y +//config: depends on VI +//config: help +//config: Make busybox vi behave nicely with terminals that get resized. +//config: +//config:config FEATURE_VI_ASK_TERMINAL +//config: bool "Use 'tell me cursor position' ESC sequence to measure window" +//config: default y +//config: depends on VI +//config: help +//config: If terminal size can't be retrieved and $LINES/$COLUMNS are not set, +//config: this option makes vi perform a last-ditch effort to find it: +//config: vi positions cursor to 999,999 and asks terminal to report real +//config: cursor position using "ESC [ 6 n" escape sequence, then reads stdin. +//config: +//config: This is not clean but helps a lot on serial lines and such. +//config: +//config:config FEATURE_VI_OPTIMIZE_CURSOR +//config: bool "Optimize cursor movement" +//config: default y +//config: depends on VI +//config: help +//config: This will make the cursor movement faster, but requires more memory +//config: and it makes the applet a tiny bit larger. + +//applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_VI) += vi.o + //usage:#define vi_trivial_usage //usage: "[OPTIONS] [FILE]..." //usage:#define vi_full_usage "\n\n" @@ -33,6 +161,7 @@ //usage: ) //usage: "\n -H Short help regarding available features" +#include <regex.h> #include "libbb.h" /* the CRASHME code is unmaintained, and doesn't currently build */ @@ -366,7 +495,6 @@ static void Hit_Return(void); #if ENABLE_FEATURE_VI_SEARCH static char *char_search(char *, const char *, int, int); // search for pattern starting at p -static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase" #endif #if ENABLE_FEATURE_VI_COLON static char *get_one_address(char *, int *); // get colon addr, if present @@ -1561,48 +1689,16 @@ static char *new_screen(int ro, int co) } #if ENABLE_FEATURE_VI_SEARCH -static int mycmp(const char *s1, const char *s2, int len) -{ - if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) { - return strncasecmp(s1, s2, len); - } - return strncmp(s1, s2, len); -} + +# if ENABLE_FEATURE_VI_REGEX_SEARCH // search for pattern starting at p static char *char_search(char *p, const char *pat, int dir, int range) { -#ifndef REGEX_SEARCH - char *start, *stop; - int len; - - len = strlen(pat); - if (dir == 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 if (dir == 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; -#else /* REGEX_SEARCH */ char *q; struct re_pattern_buffer preg; int i; - int size, range; + int size; re_syntax_options = RE_SYNTAX_POSIX_EXTENDED; preg.translate = 0; @@ -1625,7 +1721,7 @@ static char *char_search(char *p, const char *pat, int dir, int range) // RANGE could be negative if we are searching backwards range = q - p; - q = re_compile_pattern(pat, strlen(pat), &preg); + q = (char *)re_compile_pattern(pat, strlen(pat), (struct re_pattern_buffer *)&preg); if (q != 0) { // The pattern was not compiled status_line_bold("bad search pattern: \"%s\": %s", pat, q); @@ -1659,8 +1755,53 @@ static char *char_search(char *p, const char *pat, int dir, int range) p = p - i; } return p; -#endif /* REGEX_SEARCH */ } + +# 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, int range) +{ + char *start, *stop; + int len; + + len = strlen(pat); + if (dir == 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 if (dir == 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 */ static char *char_insert(char *p, char c) // insert the char c at 'p' @@ -2022,8 +2163,8 @@ static void show_help(void) "\n\tNamed buffers with \"x" #endif #if ENABLE_FEATURE_VI_READONLY - "\n\tReadonly if vi is called as \"view\"" - "\n\tReadonly with -R command line arg" + //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 \':\'" |