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sed: fix handling of 1d;1,3p and 1d;1,REGEXp
function old new delta process_files 2084 2173 +89 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
parent
f1fab09242
commit
8bca3e20b9
486
editors/sed.c
486
editors/sed.c
@ -865,63 +865,80 @@ static void process_files(void)
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/* Prime the pump */
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/* Prime the pump */
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next_line = get_next_line(&next_gets_char);
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next_line = get_next_line(&next_gets_char);
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/* go through every line in each file */
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/* Go through every line in each file */
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again:
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again:
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substituted = 0;
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substituted = 0;
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/* Advance to next line. Stop if out of lines. */
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/* Advance to next line. Stop if out of lines. */
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pattern_space = next_line;
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pattern_space = next_line;
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if (!pattern_space) return;
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if (!pattern_space)
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return;
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last_gets_char = next_gets_char;
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last_gets_char = next_gets_char;
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/* Read one line in advance so we can act on the last line,
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/* Read one line in advance so we can act on the last line,
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* the '$' address */
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* the '$' address */
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next_line = get_next_line(&next_gets_char);
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next_line = get_next_line(&next_gets_char);
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linenum++;
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linenum++;
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/* For every line, go through all the commands */
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restart:
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restart:
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/* for every line, go through all the commands */
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for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
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for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) {
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int old_matched, matched;
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int old_matched, matched;
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old_matched = sed_cmd->in_match;
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old_matched = sed_cmd->in_match;
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/* Determine if this command matches this line: */
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/* Determine if this command matches this line: */
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/* Are we continuing a previous multi-line match? */
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/* Are we continuing a previous multi-line match? */
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sed_cmd->in_match = sed_cmd->in_match
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sed_cmd->in_match = sed_cmd->in_match
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/* Or is no range necessary? */
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/* Or is no range necessary? */
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|| (!sed_cmd->beg_line && !sed_cmd->end_line
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|| (!sed_cmd->beg_line && !sed_cmd->end_line
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&& !sed_cmd->beg_match && !sed_cmd->end_match)
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&& !sed_cmd->beg_match && !sed_cmd->end_match)
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/* Or did we match the start of a numerical range? */
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/* Or did we match the start of a numerical range? */
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|| (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum))
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|| (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum
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/* "shadowed beginning" case: "1d;1,ENDp" - p still matches at line 2
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* even though 1d skipped line 1 which is a start line for p */
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|| (sed_cmd->end_line && sed_cmd->beg_line < linenum && sed_cmd->end_line >= linenum)
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|| (sed_cmd->end_match && sed_cmd->beg_line < linenum)
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)
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)
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/* Or does this line match our begin address regex? */
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/* Or does this line match our begin address regex? */
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|| (beg_match(sed_cmd, pattern_space))
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|| (beg_match(sed_cmd, pattern_space))
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/* Or did we match last line of input? */
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/* Or did we match last line of input? */
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|| (sed_cmd->beg_line == -1 && next_line == NULL);
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|| (sed_cmd->beg_line == -1 && next_line == NULL);
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/* Snapshot the value */
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matched = sed_cmd->in_match;
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matched = sed_cmd->in_match;
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/* Is this line the end of the current match? */
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//bb_error_msg("cmd:'%c' matched:%d beg_line:%d end_line:%d linenum:%d",
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//sed_cmd->cmd, matched, sed_cmd->beg_line, sed_cmd->end_line, linenum);
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/* Is this line the end of the current match? */
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if (matched) {
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if (matched) {
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sed_cmd->in_match = !(
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int n = (
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/* has the ending line come, or is this a single address command? */
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/* has the ending line come, or is this a single address command? */
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(sed_cmd->end_line ?
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sed_cmd->end_line ?
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sed_cmd->end_line == -1 ?
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sed_cmd->end_line == -1 ?
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!next_line
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!next_line
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: (sed_cmd->end_line <= linenum)
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: (sed_cmd->end_line <= linenum)
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: !sed_cmd->end_match
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: !sed_cmd->end_match
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)
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);
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if (!n) {
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/* or does this line matches our last address regex */
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/* or does this line matches our last address regex */
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|| (sed_cmd->end_match && old_matched
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n = (sed_cmd->end_match
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&& old_matched
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&& (regexec(sed_cmd->end_match,
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&& (regexec(sed_cmd->end_match,
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pattern_space, 0, NULL, 0) == 0))
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pattern_space, 0, NULL, 0) == 0)
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);
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);
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if (n && sed_cmd->beg_line > 0) {
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/* Once matched, "n,regex" range is dead, disabling it */
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regfree(sed_cmd->end_match);
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free(sed_cmd->end_match);
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sed_cmd->end_match = NULL;
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}
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}
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sed_cmd->in_match = !n;
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}
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}
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/* Skip blocks of commands we didn't match. */
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/* Skip blocks of commands we didn't match */
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if (sed_cmd->cmd == '{') {
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if (sed_cmd->cmd == '{') {
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if (sed_cmd->invert ? matched : !matched) {
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if (sed_cmd->invert ? matched : !matched) {
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while (sed_cmd->cmd != '}') {
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while (sed_cmd->cmd != '}') {
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@ -934,253 +951,254 @@ static void process_files(void)
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}
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}
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/* Okay, so did this line match? */
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/* Okay, so did this line match? */
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if (sed_cmd->invert ? !matched : matched) {
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if (sed_cmd->invert ? matched : !matched)
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/* Update last used regex in case a blank substitute BRE is found */
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continue; /* no */
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if (sed_cmd->beg_match) {
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G.previous_regex_ptr = sed_cmd->beg_match;
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}
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/* actual sedding */
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/* Update last used regex in case a blank substitute BRE is found */
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switch (sed_cmd->cmd) {
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if (sed_cmd->beg_match) {
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G.previous_regex_ptr = sed_cmd->beg_match;
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}
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/* Print line number */
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/* actual sedding */
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case '=':
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switch (sed_cmd->cmd) {
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fprintf(G.nonstdout, "%d\n", linenum);
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break;
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/* Write the current pattern space up to the first newline */
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/* Print line number */
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case 'P':
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case '=':
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{
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fprintf(G.nonstdout, "%d\n", linenum);
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char *tmp = strchr(pattern_space, '\n');
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break;
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if (tmp) {
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/* Write the current pattern space up to the first newline */
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*tmp = '\0';
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case 'P':
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/* TODO: explain why '\n' below */
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{
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sed_puts(pattern_space, '\n');
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char *tmp = strchr(pattern_space, '\n');
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*tmp = '\n';
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break;
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}
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/* Fall Through */
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}
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/* Write the current pattern space to output */
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if (tmp) {
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case 'p':
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*tmp = '\0';
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/* NB: we print this _before_ the last line
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/* TODO: explain why '\n' below */
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* (of current file) is printed. Even if
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* that line is nonterminated, we print
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* '\n' here (gnu sed does the same) */
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sed_puts(pattern_space, '\n');
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sed_puts(pattern_space, '\n');
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break;
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*tmp = '\n';
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/* Delete up through first newline */
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case 'D':
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{
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char *tmp = strchr(pattern_space, '\n');
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if (tmp) {
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tmp = xstrdup(tmp+1);
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free(pattern_space);
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pattern_space = tmp;
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goto restart;
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}
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}
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/* discard this line. */
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case 'd':
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goto discard_line;
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/* Substitute with regex */
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case 's':
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if (!do_subst_command(sed_cmd, &pattern_space))
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break;
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substituted |= 1;
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/* handle p option */
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if (sed_cmd->sub_p)
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sed_puts(pattern_space, last_gets_char);
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/* handle w option */
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if (sed_cmd->sw_file)
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puts_maybe_newline(
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pattern_space, sed_cmd->sw_file,
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&sed_cmd->sw_last_char, last_gets_char);
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break;
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/* Append line to linked list to be printed later */
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case 'a':
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append(sed_cmd->string);
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break;
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/* Insert text before this line */
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case 'i':
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sed_puts(sed_cmd->string, '\n');
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break;
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/* Cut and paste text (replace) */
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case 'c':
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/* Only triggers on last line of a matching range. */
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if (!sed_cmd->in_match)
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sed_puts(sed_cmd->string, NO_EOL_CHAR);
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goto discard_line;
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/* Read file, append contents to output */
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case 'r':
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{
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FILE *rfile;
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rfile = fopen_for_read(sed_cmd->string);
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if (rfile) {
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char *line;
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while ((line = xmalloc_fgetline(rfile))
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!= NULL)
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append(line);
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xprint_and_close_file(rfile);
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}
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break;
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break;
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}
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}
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/* Fall Through */
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}
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/* Write pattern space to file. */
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/* Write the current pattern space to output */
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case 'w':
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case 'p':
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/* NB: we print this _before_ the last line
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* (of current file) is printed. Even if
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* that line is nonterminated, we print
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* '\n' here (gnu sed does the same) */
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sed_puts(pattern_space, '\n');
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break;
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/* Delete up through first newline */
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case 'D':
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{
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char *tmp = strchr(pattern_space, '\n');
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if (tmp) {
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tmp = xstrdup(tmp+1);
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free(pattern_space);
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pattern_space = tmp;
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goto restart;
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}
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}
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/* discard this line. */
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case 'd':
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goto discard_line;
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/* Substitute with regex */
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case 's':
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if (!do_subst_command(sed_cmd, &pattern_space))
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break;
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substituted |= 1;
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/* handle p option */
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if (sed_cmd->sub_p)
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sed_puts(pattern_space, last_gets_char);
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/* handle w option */
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if (sed_cmd->sw_file)
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puts_maybe_newline(
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puts_maybe_newline(
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pattern_space, sed_cmd->sw_file,
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pattern_space, sed_cmd->sw_file,
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&sed_cmd->sw_last_char, last_gets_char);
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&sed_cmd->sw_last_char, last_gets_char);
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break;
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break;
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/* Read next line from input */
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/* Append line to linked list to be printed later */
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case 'n':
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case 'a':
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if (!G.be_quiet)
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append(sed_cmd->string);
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sed_puts(pattern_space, last_gets_char);
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break;
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if (next_line) {
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free(pattern_space);
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pattern_space = next_line;
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last_gets_char = next_gets_char;
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next_line = get_next_line(&next_gets_char);
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substituted = 0;
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linenum++;
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break;
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}
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/* fall through */
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/* Quit. End of script, end of input. */
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/* Insert text before this line */
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case 'q':
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case 'i':
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/* Exit the outer while loop */
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sed_puts(sed_cmd->string, '\n');
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free(next_line);
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break;
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next_line = NULL;
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goto discard_commands;
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/* Append the next line to the current line */
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/* Cut and paste text (replace) */
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case 'N':
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case 'c':
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{
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/* Only triggers on last line of a matching range. */
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int len;
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if (!sed_cmd->in_match)
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/* If no next line, jump to end of script and exit. */
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sed_puts(sed_cmd->string, NO_EOL_CHAR);
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if (next_line == NULL) {
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goto discard_line;
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/* Jump to end of script and exit */
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free(next_line);
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/* Read file, append contents to output */
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next_line = NULL;
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case 'r':
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goto discard_line;
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{
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/* append next_line, read new next_line. */
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FILE *rfile;
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}
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len = strlen(pattern_space);
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rfile = fopen_for_read(sed_cmd->string);
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pattern_space = realloc(pattern_space, len + strlen(next_line) + 2);
|
if (rfile) {
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pattern_space[len] = '\n';
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char *line;
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strcpy(pattern_space + len+1, next_line);
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|
while ((line = xmalloc_fgetline(rfile))
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!= NULL)
|
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|
append(line);
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|
xprint_and_close_file(rfile);
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|
}
|
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|
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|
break;
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|
}
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|
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|
/* Write pattern space to file. */
|
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|
case 'w':
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|
puts_maybe_newline(
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|
pattern_space, sed_cmd->sw_file,
|
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|
&sed_cmd->sw_last_char, last_gets_char);
|
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|
break;
|
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|
|
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/* Read next line from input */
|
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case 'n':
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|
if (!G.be_quiet)
|
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|
sed_puts(pattern_space, last_gets_char);
|
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|
if (next_line) {
|
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|
free(pattern_space);
|
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|
pattern_space = next_line;
|
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last_gets_char = next_gets_char;
|
last_gets_char = next_gets_char;
|
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next_line = get_next_line(&next_gets_char);
|
next_line = get_next_line(&next_gets_char);
|
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|
substituted = 0;
|
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linenum++;
|
linenum++;
|
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break;
|
break;
|
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}
|
}
|
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|
/* fall through */
|
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|
|
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/* Test/branch if substitution occurred */
|
/* Quit. End of script, end of input. */
|
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case 't':
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case 'q':
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if (!substituted) break;
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/* Exit the outer while loop */
|
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substituted = 0;
|
free(next_line);
|
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/* Fall through */
|
next_line = NULL;
|
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/* Test/branch if substitution didn't occur */
|
goto discard_commands;
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case 'T':
|
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if (substituted) break;
|
|
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/* Fall through */
|
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/* Branch to label */
|
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case 'b':
|
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if (!sed_cmd->string) goto discard_commands;
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|
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else sed_cmd = branch_to(sed_cmd->string);
|
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break;
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/* Transliterate characters */
|
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case 'y':
|
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{
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int i, j;
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|
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|
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for (i = 0; pattern_space[i]; i++) {
|
/* Append the next line to the current line */
|
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for (j = 0; sed_cmd->string[j]; j += 2) {
|
case 'N':
|
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if (pattern_space[i] == sed_cmd->string[j]) {
|
{
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pattern_space[i] = sed_cmd->string[j + 1];
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int len;
|
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break;
|
/* If no next line, jump to end of script and exit. */
|
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}
|
if (next_line == NULL) {
|
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|
/* Jump to end of script and exit */
|
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|
free(next_line);
|
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|
next_line = NULL;
|
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|
goto discard_line;
|
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|
/* append next_line, read new next_line. */
|
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|
}
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||||||
|
len = strlen(pattern_space);
|
||||||
|
pattern_space = realloc(pattern_space, len + strlen(next_line) + 2);
|
||||||
|
pattern_space[len] = '\n';
|
||||||
|
strcpy(pattern_space + len+1, next_line);
|
||||||
|
last_gets_char = next_gets_char;
|
||||||
|
next_line = get_next_line(&next_gets_char);
|
||||||
|
linenum++;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Test/branch if substitution occurred */
|
||||||
|
case 't':
|
||||||
|
if (!substituted) break;
|
||||||
|
substituted = 0;
|
||||||
|
/* Fall through */
|
||||||
|
/* Test/branch if substitution didn't occur */
|
||||||
|
case 'T':
|
||||||
|
if (substituted) break;
|
||||||
|
/* Fall through */
|
||||||
|
/* Branch to label */
|
||||||
|
case 'b':
|
||||||
|
if (!sed_cmd->string) goto discard_commands;
|
||||||
|
else sed_cmd = branch_to(sed_cmd->string);
|
||||||
|
break;
|
||||||
|
/* Transliterate characters */
|
||||||
|
case 'y':
|
||||||
|
{
|
||||||
|
int i, j;
|
||||||
|
|
||||||
|
for (i = 0; pattern_space[i]; i++) {
|
||||||
|
for (j = 0; sed_cmd->string[j]; j += 2) {
|
||||||
|
if (pattern_space[i] == sed_cmd->string[j]) {
|
||||||
|
pattern_space[i] = sed_cmd->string[j + 1];
|
||||||
|
break;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
break;
|
|
||||||
}
|
}
|
||||||
case 'g': /* Replace pattern space with hold space */
|
|
||||||
free(pattern_space);
|
|
||||||
pattern_space = xstrdup(G.hold_space ? G.hold_space : "");
|
|
||||||
break;
|
|
||||||
case 'G': /* Append newline and hold space to pattern space */
|
|
||||||
{
|
|
||||||
int pattern_space_size = 2;
|
|
||||||
int hold_space_size = 0;
|
|
||||||
|
|
||||||
if (pattern_space)
|
break;
|
||||||
pattern_space_size += strlen(pattern_space);
|
|
||||||
if (G.hold_space)
|
|
||||||
hold_space_size = strlen(G.hold_space);
|
|
||||||
pattern_space = xrealloc(pattern_space,
|
|
||||||
pattern_space_size + hold_space_size);
|
|
||||||
if (pattern_space_size == 2)
|
|
||||||
pattern_space[0] = 0;
|
|
||||||
strcat(pattern_space, "\n");
|
|
||||||
if (G.hold_space)
|
|
||||||
strcat(pattern_space, G.hold_space);
|
|
||||||
last_gets_char = '\n';
|
|
||||||
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
case 'h': /* Replace hold space with pattern space */
|
|
||||||
free(G.hold_space);
|
|
||||||
G.hold_space = xstrdup(pattern_space);
|
|
||||||
break;
|
|
||||||
case 'H': /* Append newline and pattern space to hold space */
|
|
||||||
{
|
|
||||||
int hold_space_size = 2;
|
|
||||||
int pattern_space_size = 0;
|
|
||||||
|
|
||||||
if (G.hold_space)
|
|
||||||
hold_space_size += strlen(G.hold_space);
|
|
||||||
if (pattern_space)
|
|
||||||
pattern_space_size = strlen(pattern_space);
|
|
||||||
G.hold_space = xrealloc(G.hold_space,
|
|
||||||
hold_space_size + pattern_space_size);
|
|
||||||
|
|
||||||
if (hold_space_size == 2)
|
|
||||||
*G.hold_space = 0;
|
|
||||||
strcat(G.hold_space, "\n");
|
|
||||||
if (pattern_space)
|
|
||||||
strcat(G.hold_space, pattern_space);
|
|
||||||
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
case 'x': /* Exchange hold and pattern space */
|
|
||||||
{
|
|
||||||
char *tmp = pattern_space;
|
|
||||||
pattern_space = G.hold_space ? : xzalloc(1);
|
|
||||||
last_gets_char = '\n';
|
|
||||||
G.hold_space = tmp;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
}
|
||||||
}
|
case 'g': /* Replace pattern space with hold space */
|
||||||
|
free(pattern_space);
|
||||||
|
pattern_space = xstrdup(G.hold_space ? G.hold_space : "");
|
||||||
|
break;
|
||||||
|
case 'G': /* Append newline and hold space to pattern space */
|
||||||
|
{
|
||||||
|
int pattern_space_size = 2;
|
||||||
|
int hold_space_size = 0;
|
||||||
|
|
||||||
|
if (pattern_space)
|
||||||
|
pattern_space_size += strlen(pattern_space);
|
||||||
|
if (G.hold_space)
|
||||||
|
hold_space_size = strlen(G.hold_space);
|
||||||
|
pattern_space = xrealloc(pattern_space,
|
||||||
|
pattern_space_size + hold_space_size);
|
||||||
|
if (pattern_space_size == 2)
|
||||||
|
pattern_space[0] = 0;
|
||||||
|
strcat(pattern_space, "\n");
|
||||||
|
if (G.hold_space)
|
||||||
|
strcat(pattern_space, G.hold_space);
|
||||||
|
last_gets_char = '\n';
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case 'h': /* Replace hold space with pattern space */
|
||||||
|
free(G.hold_space);
|
||||||
|
G.hold_space = xstrdup(pattern_space);
|
||||||
|
break;
|
||||||
|
case 'H': /* Append newline and pattern space to hold space */
|
||||||
|
{
|
||||||
|
int hold_space_size = 2;
|
||||||
|
int pattern_space_size = 0;
|
||||||
|
|
||||||
|
if (G.hold_space)
|
||||||
|
hold_space_size += strlen(G.hold_space);
|
||||||
|
if (pattern_space)
|
||||||
|
pattern_space_size = strlen(pattern_space);
|
||||||
|
G.hold_space = xrealloc(G.hold_space,
|
||||||
|
hold_space_size + pattern_space_size);
|
||||||
|
|
||||||
|
if (hold_space_size == 2)
|
||||||
|
*G.hold_space = 0;
|
||||||
|
strcat(G.hold_space, "\n");
|
||||||
|
if (pattern_space)
|
||||||
|
strcat(G.hold_space, pattern_space);
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case 'x': /* Exchange hold and pattern space */
|
||||||
|
{
|
||||||
|
char *tmp = pattern_space;
|
||||||
|
pattern_space = G.hold_space ? : xzalloc(1);
|
||||||
|
last_gets_char = '\n';
|
||||||
|
G.hold_space = tmp;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
} /* switch */
|
||||||
|
} /* for each cmd */
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* exit point from sedding...
|
* Exit point from sedding...
|
||||||
*/
|
*/
|
||||||
discard_commands:
|
discard_commands:
|
||||||
/* we will print the line unless we were told to be quiet ('-n')
|
/* we will print the line unless we were told to be quiet ('-n')
|
||||||
|
|||||||
@ -207,4 +207,17 @@ testing "sed n command must reset 'substituted' bit" \
|
|||||||
"sed 's/1/x/;T;n;: next;s/3/y/;t quit;n;b next;: quit;q'" \
|
"sed 's/1/x/;T;n;: next;s/3/y/;t quit;n;b next;: quit;q'" \
|
||||||
"0\nx\n2\ny\n" "" "0\n1\n2\n3\n"
|
"0\nx\n2\ny\n" "" "0\n1\n2\n3\n"
|
||||||
|
|
||||||
|
testing "sed d does not break n,m matching" \
|
||||||
|
"sed -n '1d;1,3p'" \
|
||||||
|
"second\nthird\n" "" "first\nsecond\nthird\nfourth\n"
|
||||||
|
|
||||||
|
testing "sed d does not break n,regex matching" \
|
||||||
|
"sed -n '1d;1,/hir/p'" \
|
||||||
|
"second\nthird\n" "" "first\nsecond\nthird\nfourth\n"
|
||||||
|
|
||||||
|
testing "sed d does not break n,regex matching #2" \
|
||||||
|
"sed -n '1,5d;1,/hir/p'" \
|
||||||
|
"second2\nthird2\n" "" \
|
||||||
|
"first\nsecond\nthird\nfourth\n""first2\nsecond2\nthird2\nfourth2\n"
|
||||||
|
|
||||||
exit $FAILCOUNT
|
exit $FAILCOUNT
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user