diff options
| -rw-r--r-- | editors/sed.c | 73 |
1 files changed, 37 insertions, 36 deletions
diff --git a/editors/sed.c b/editors/sed.c index a616c99..db31718 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -4,6 +4,7 @@ * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org> * Copyright (C) 2002 Matt Kraai + * Copyright (C) 2003 by Glenn McGrath <bug1@optushome.com.au> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -31,6 +32,9 @@ - file commands: (r)ead - backreferences in substitution expressions (\1, \2...\9) - grouped commands: {cmd1;cmd2} + - transliteration (y/source-chars/dest-chars/) + - pattern space hold space storing / swapping (g, h, x) + - labels / branching (: label, b, t) (Note: Specifying an address (range) to match is *optional*; commands default to the whole pattern space if no specific address match was @@ -38,11 +42,13 @@ Unsupported features: - - transliteration (y/source-chars/dest-chars/) (use 'tr') - - no pattern space hold space storing / swapping (x, etc.) - - no labels / branching (: label, b, t, and friends) + - GNU extensions - and lots, lots more. + Bugs: + + - Cant subst globally using ^ or $ in regex, eg. "aah" | sed 's/^a/b/g' + Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html */ @@ -55,19 +61,6 @@ #include <stdlib.h> #include "busybox.h" -/* the spec says label must be at least 8 chars, behavious is unspecified if more than 8 chars */ -#define SED_LABEL_LENGTH 8 - -/* externs */ -extern void xregcomp(regex_t * preg, const char *regex, int cflags); -extern int optind; /* in unistd.h */ -extern char *optarg; /* ditto */ - -/* options */ -static int be_quiet = 0; -static const char bad_format_in_subst[] = - "bad format in substitution expression"; - typedef struct sed_cmd_s { /* Order by alignment requirements */ @@ -109,14 +102,25 @@ typedef struct sed_cmd_s { int invert; /* the '!' after the address */ /* Branch commands */ - char label[SED_LABEL_LENGTH + 1]; + char *label; /* next command in list (sequential list of specified commands) */ - struct sed_cmd_s *linear; + struct sed_cmd_s *next; } sed_cmd_t; + +/* externs */ +extern void xregcomp(regex_t * preg, const char *regex, int cflags); +extern int optind; /* in unistd.h */ +extern char *optarg; /* ditto */ + /* globals */ +/* options */ +static int be_quiet = 0; +static const char bad_format_in_subst[] = + "bad format in substitution expression"; + /* linked list of sed commands */ static sed_cmd_t sed_cmd_head; static sed_cmd_t *sed_cmd_tail = &sed_cmd_head; @@ -126,13 +130,14 @@ static int in_block = 0; const char *const semicolon_whitespace = "; \n\r\t\v\0"; static regex_t *previous_regex_ptr = NULL; + #ifdef CONFIG_FEATURE_CLEAN_UP static void destroy_cmd_strs(void) { - sed_cmd_t *sed_cmd = sed_cmd_head.linear; + sed_cmd_t *sed_cmd = sed_cmd_head.next; while (sed_cmd) { - sed_cmd_t *sed_cmd_next = sed_cmd->linear; + sed_cmd_t *sed_cmd_next = sed_cmd->next; if (sed_cmd->beg_match) { regfree(sed_cmd->beg_match); @@ -445,7 +450,7 @@ static int parse_file_cmd(sed_cmd_t * sed_cmd, const char *filecmdstr) /* * Process the commands arguments */ -static char *parse_cmd_str(sed_cmd_t * const sed_cmd, char *cmdstr) +static char *parse_cmd_str(sed_cmd_t *sed_cmd, char *cmdstr) { /* handle (s)ubstitution command */ if (sed_cmd->cmd == 's') { @@ -469,11 +474,8 @@ static char *parse_cmd_str(sed_cmd_t * const sed_cmd, char *cmdstr) int length; cmdstr += strspn(cmdstr, " "); - length = strcspn(cmdstr, "; "); - if (length > SED_LABEL_LENGTH) { - length = SED_LABEL_LENGTH; - } - strncpy(sed_cmd->label, cmdstr, length); + length = strcspn(cmdstr, "; \n"); + sed_cmd->label = strndup(cmdstr, length); cmdstr += length; } /* translation command */ @@ -595,8 +597,8 @@ static char *add_cmd(sed_cmd_t * sed_cmd, char *cmdstr) cmdstr = parse_cmd_str(sed_cmd, cmdstr); /* Add the command to the command array */ - sed_cmd_tail->linear = sed_cmd; - sed_cmd_tail = sed_cmd_tail->linear; + sed_cmd_tail->next = sed_cmd; + sed_cmd_tail = sed_cmd_tail->next; return (cmdstr); } @@ -805,9 +807,8 @@ static int do_subst_command(sed_cmd_t * sed_cmd, char **line) static sed_cmd_t *branch_to(const char *label) { sed_cmd_t *sed_cmd; - - for (sed_cmd = sed_cmd_head.linear; sed_cmd; sed_cmd = sed_cmd->linear) { - if (strcmp(sed_cmd->label, label) == 0) { + for (sed_cmd = sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) { + if ((sed_cmd->label) && (strcmp(sed_cmd->label, label) == 0)) { break; } } @@ -844,8 +845,8 @@ static void process_file(FILE * file) force_print = 0; /* for every line, go through all the commands */ - for (sed_cmd = sed_cmd_head.linear; sed_cmd; - sed_cmd = sed_cmd->linear) { + for (sed_cmd = sed_cmd_head.next; sed_cmd; + sed_cmd = sed_cmd->next) { int deleted = 0; /* @@ -952,8 +953,8 @@ static void process_file(FILE * file) } #endif altered |= substituted; - if (!be_quiet && altered && ((sed_cmd->linear == NULL) - || (sed_cmd->linear->cmd != + if (!be_quiet && altered && ((sed_cmd->next == NULL) + || (sed_cmd->next->cmd != 's'))) { force_print = 1; } @@ -1160,7 +1161,7 @@ extern int sed_main(int argc, char **argv) /* if we didn't get a pattern from a -e and no command file was specified, * argv[optind] should be the pattern. no pattern, no worky */ - if (sed_cmd_head.linear == NULL) { + if (sed_cmd_head.next == NULL) { if (argv[optind] == NULL) bb_show_usage(); else { |