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authorGlenn L McGrath2003-04-07 16:04:14 +0000
committerGlenn L McGrath2003-04-07 16:04:14 +0000
commit7ce9e247f025af4ca217a89d914626dda24566d9 (patch)
tree3cded3628da03b9db42d4cf777d716dd3c635cbb
parentc6adada1584df76a85ed08ba7bbfa9a8c3302f99 (diff)
downloadbusybox-7ce9e247f025af4ca217a89d914626dda24566d9.zip
busybox-7ce9e247f025af4ca217a89d914626dda24566d9.tar.gz
Add hold space commands 'g', 'h', 'x'
-rw-r--r--editors/sed.c24
1 files changed, 19 insertions, 5 deletions
diff --git a/editors/sed.c b/editors/sed.c
index 834f066..1673ee2 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -95,7 +95,7 @@ typedef struct sed_cmd_s {
/* Note: GNU/POSIX sed does not save more than nine backrefs, so
* we only use 4 bits to hold the number */
unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
- unsigned int sub_p:2; /* sed -e 's/foo/bar/p' (print substitution) */
+ unsigned int sub_p:1; /* sed -e 's/foo/bar/p' (print substitution) */
/* TRANSLATE COMMAND */
char *translate;
@@ -267,7 +267,6 @@ static int parse_subst_cmd(sed_cmd_t * const sed_cmd, const char *substr)
*
* (all three of the '/' slashes are mandatory)
*/
-
idx = parse_regex_delim(substr, &match, &sed_cmd->replace);
/* determine the number of back references in the match string */
@@ -473,7 +472,7 @@ static char *parse_cmd_str(sed_cmd_t * const sed_cmd, char *cmdstr)
/* if it wasnt a single-letter command that takes no arguments
* then it must be an invalid command.
*/
- else if (strchr("nNpPqd=", sed_cmd->cmd) == 0) {
+ else if (strchr("dghnNpPqx=", sed_cmd->cmd) == 0) {
bb_error_msg_and_die("Unsupported command %c", sed_cmd->cmd);
}
@@ -743,10 +742,10 @@ static int do_subst_command(const sed_cmd_t *sed_cmd, char **line)
altered++;
/* if we're not doing this globally, get out now */
- if (!sed_cmd->sub_g)
+ if (!sed_cmd->sub_g) {
break;
+ }
}
-
for (; *hackline; hackline++) pipeputc(*hackline);
if (thepipe.buf[thepipe.idx] == PIPE_MAGIC) thepipe.buf[thepipe.idx] = 0;
@@ -774,6 +773,7 @@ static sed_cmd_t *branch_to(const char *label)
static void process_file(FILE *file)
{
char *pattern_space; /* Posix requires it be able to hold at least 8192 bytes */
+ char *hold_space = NULL; /* Posix requires it be able to hold at least 8192 bytes */
static int linenum = 0; /* GNU sed does not restart counting lines at EOF */
unsigned int still_in_range = 0;
int altered;
@@ -975,6 +975,20 @@ static void process_file(FILE *file)
}
}
break;
+ case 'g': /* Replace pattern space with hold space */
+ free(pattern_space);
+ pattern_space = strdup(hold_space);
+ break;
+ case 'h': /* Replace hold space with pattern space */
+ free(hold_space);
+ hold_space = strdup(pattern_space);
+ break;
+ case 'x': { /* Swap hold and pattern space */
+ char *tmp;
+ tmp = pattern_space;
+ pattern_space = hold_space;
+ hold_space = tmp;
+ }
}
}