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Add hold space commands 'g', 'h', 'x'

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This commit is contained in:
Glenn L McGrath 2003-04-07 16:04:14 +00:00
parent c6adada158
commit 7ce9e247f0
1 changed files with 19 additions and 5 deletions
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24
editors/sed.c
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@ -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;
}
}
}