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authorGlenn L McGrath <bug1@ihug.co.nz>2003-03-28 03:53:31 +0000
committerGlenn L McGrath <bug1@ihug.co.nz>2003-03-28 03:53:31 +0000
commitc949bfa555cb844bd867b7c9fdf1874647df3543 (patch)
tree57c1c30fb74f674552f42fd8bded6050dafb96b4 /editors
parent3a9b0bf0ba475476c5922f229debeb8db1a2a5ca (diff)
downloadbusybox-c949bfa555cb844bd867b7c9fdf1874647df3543.tar.gz
Use a linked list for sed commands in preparation for branching support
Diffstat (limited to 'editors')
-rw-r--r--editors/sed.c39
1 files changed, 24 insertions, 15 deletions
diff --git a/editors/sed.c b/editors/sed.c
index 2ff028498..85eb9f68d 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -101,14 +101,17 @@ typedef struct sed_cmd_s {
char cmd; /* p,d,s (add more at your leisure :-) */
/* inversion flag */
- int invert; /* the '!' after the address */
+ int invert; /* the '!' after the address */
+
+ /* next command in list (sequential list of specified commands) */
+ struct sed_cmd_s *linear;
+
} sed_cmd_t;
/* globals */
-static sed_cmd_t **sed_cmds = NULL; /* growable arrary holding a sequence of sed cmds */
-static int ncmds = 0; /* number of sed commands */
-
-/*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */
+/* linked list of sed commands */
+static sed_cmd_t sed_cmd_head;
+static sed_cmd_t *sed_cmd_tail = &sed_cmd_head;
const char * const semicolon_whitespace = "; \n\r\t\v\0";
@@ -485,19 +488,26 @@ static char *add_cmd(sed_cmd_t *sed_cmd, char *cmdstr)
if (sed_cmd->cmd == '{') {
do {
+ sed_cmd_t *sed_cmd_new;
char *end_ptr = strpbrk(cmdstr, ";}");
+
*end_ptr = '\0';
- add_cmd(sed_cmd, cmdstr);
+ sed_cmd_new = xcalloc(1, sizeof(sed_cmd_t));
+ sed_cmd_new->beg_match = sed_cmd->beg_match;
+ sed_cmd_new->end_match = sed_cmd->end_match;
+ sed_cmd_new->beg_line = sed_cmd->beg_line;
+ sed_cmd_new->end_line = sed_cmd->end_line;
+ sed_cmd_new->invert = sed_cmd->invert;
+
+ add_cmd(sed_cmd_new, cmdstr);
cmdstr = end_ptr + 1;
} while (*cmdstr != '\0');
} else {
-
cmdstr = parse_cmd_str(sed_cmd, cmdstr);
/* Add the command to the command array */
- sed_cmds = xrealloc(sed_cmds, sizeof(sed_cmd_t) * (++ncmds));
- sed_cmds[ncmds-1] = xmalloc(sizeof(sed_cmd_t));
- memcpy(sed_cmds[ncmds-1], sed_cmd, sizeof(sed_cmd_t));
+ sed_cmd_tail->linear = sed_cmd;
+ sed_cmd_tail = sed_cmd_tail->linear;
}
return(cmdstr);
}
@@ -677,7 +687,6 @@ static void process_file(FILE *file)
static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
unsigned int still_in_range = 0;
int altered;
- int i;
line = bb_get_chomped_line_from_file(file);
if (line == NULL) {
@@ -687,6 +696,7 @@ static void process_file(FILE *file)
/* go through every line in the file */
do {
char *next_line;
+ sed_cmd_t *sed_cmd;
/* Read one line in advance so we can act on the last line, the '$' address */
next_line = bb_get_chomped_line_from_file(file);
@@ -695,8 +705,7 @@ static void process_file(FILE *file)
altered = 0;
/* for every line, go through all the commands */
- for (i = 0; i < ncmds; i++) {
- sed_cmd_t *sed_cmd = sed_cmds[i];
+ for (sed_cmd = sed_cmd_head.linear; sed_cmd; sed_cmd = sed_cmd->linear) {
int deleted = 0;
/*
@@ -770,7 +779,7 @@ static void process_file(FILE *file)
* (this is quite possibly the second printing) */
if (sed_cmd->sub_p)
altered |= do_subst_command(sed_cmd, &line);
- if (altered && (i+1 >= ncmds || sed_cmds[i+1]->cmd != 's'))
+ if (altered && ((sed_cmd->linear == NULL) || (sed_cmd->linear->cmd != 's')))
puts(line);
break;
@@ -900,7 +909,7 @@ 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 (ncmds == 0) {
+ if (sed_cmd_head.linear == NULL) {
if (argv[optind] == NULL)
bb_show_usage();
else {