sed: style improvements
- declare variables at the top of a function. - free(NULL) is valid. - avoid VLA.
This commit is contained in:
Hiltjo Posthuma
parent
0547e72441
commit
244539e473
61
sed.c
61
sed.c
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@ -685,15 +685,15 @@ echarntorune(Rune *r, char *s, size_t n)
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void
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insert_labels(void)
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{
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size_t i;
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Cmd *from, *to;
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while (branches.size) {
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Cmd *from = prog + (ptrdiff_t)pop(&branches);
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from = prog + (ptrdiff_t)pop(&branches);
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if (!from->u.label) {/* no label branch to end of script */
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from->u.jump = pc - 1;
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} else {
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size_t i;
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Cmd *to;
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for (i = 0; i < labels.size; i++) {
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to = prog + (ptrdiff_t)labels.data[i];
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if (!strcmp(from->u.label, to->u.label)) {
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@ -824,13 +824,13 @@ get_s_arg(Cmd *c, char *s)
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Rune delim, r;
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Cmd buf;
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char *p;
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int esc;
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int esc, lastre;
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/* s/Find/Replace/Flags */
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/* Find */
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if (!gflags.s_cont) { /* NOT continuing from literal newline in replacement text */
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int lastre = 0;
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lastre = 0;
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c->u.s.repl = (String){ NULL, 0 };
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c->u.s.occurrence = 1;
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c->u.s.file = NULL;
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@ -923,10 +923,9 @@ get_s_arg(Cmd *c, char *s)
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void
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free_s_arg(Cmd *c)
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{
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if (c->u.s.re) {
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if (c->u.s.re)
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regfree(c->u.s.re);
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free(c->u.s.re);
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}
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free(c->u.s.repl.str);
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}
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@ -1338,8 +1337,8 @@ cmd_l(Cmd *c)
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* just wrap at 80 Runes?
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*/
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for (p = patt.str, end = p + strlen(p); p < end; p += rlen) {
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if (isascii(*p) && escapes[(unsigned)*p]) {
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printf("%s", escapes[(unsigned)*p]);
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if (isascii(*p) && escapes[(unsigned int)*p]) {
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printf("%s", escapes[(unsigned int)*p]);
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rlen = 1;
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} else if (!(rlen = charntorune(&r, p, end - p))) {
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/* ran out of chars, print the bytes of the short sequence */
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@ -1426,22 +1425,30 @@ cmd_r(Cmd *c)
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void
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cmd_s(Cmd *c)
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{
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String tmp;
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Rune r;
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size_t plen, rlen, len;
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char *p, *s, *end;
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unsigned int matches = 0, last_empty = 1, qflag = 0, cflags = 0;
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regex_t *re;
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regmatch_t *rm, *pmatch = NULL;
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if (!in_range(c))
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return;
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if (!c->u.s.re && !lastre)
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leprintf("no previous regex");
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regex_t *re = c->u.s.re ? c->u.s.re : lastre;
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regmatch_t pmatch[re->re_nsub + 1];
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unsigned matches = 0, last_empty = 1, qflag = 0, cflags = 0;
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char *s = patt.str;
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String tmp;
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re = c->u.s.re ? c->u.s.re : lastre;
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lastre = re;
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*genbuf.str = '\0';
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while (!qflag && !regexec(re, s, LEN(pmatch), pmatch, cflags)) {
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plen = re->re_nsub + 1;
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pmatch = emalloc(plen * sizeof(regmatch_t));
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*genbuf.str = '\0';
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s = patt.str;
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while (!qflag && !regexec(re, s, plen, pmatch, cflags)) {
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cflags = REG_NOTBOL; /* match against beginning of line first time, but not again */
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if (!*s) /* match against empty string first time, but not again */
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qflag = 1;
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@ -1452,9 +1459,6 @@ cmd_s(Cmd *c)
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*/
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if ((last_empty || pmatch[0].rm_eo) &&
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(++matches == c->u.s.occurrence || !c->u.s.occurrence)) {
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char *p;
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size_t len;
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/* copy over everything before the match */
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strnacat(&genbuf, s, pmatch[0].rm_so);
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@ -1477,7 +1481,7 @@ cmd_s(Cmd *c)
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/* only need to check here if using lastre, otherwise we checked when building */
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if (!c->u.s.re && (size_t)(*p - '0') > re->re_nsub)
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leprintf("back reference number greater than number of groups");
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regmatch_t *rm = &pmatch[*p - '0'];
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rm = &pmatch[*p - '0'];
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strnacat(&genbuf, s + rm->rm_so, rm->rm_eo - rm->rm_so);
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} else { /* character after backslash taken literally (well one byte, but it works) */
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strnacat(&genbuf, p, 1);
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@ -1491,10 +1495,8 @@ cmd_s(Cmd *c)
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}
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if (!pmatch[0].rm_eo) { /* empty match, advance one rune and add it to output */
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Rune r;
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char *end = s + strlen(s);
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size_t rlen = charntorune(&r, s, end - s);
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end = s + strlen(s);
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rlen = charntorune(&r, s, end - s);
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if (!rlen) { /* ran out of bytes, copy short sequence */
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stracat(&genbuf, s);
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@ -1507,6 +1509,7 @@ cmd_s(Cmd *c)
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last_empty = !pmatch[0].rm_eo;
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s += pmatch[0].rm_eo;
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}
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free(pmatch);
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if (!(matches && matches >= c->u.s.occurrence)) /* no replacement */
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return;
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@ -1562,8 +1565,8 @@ cmd_y(Cmd *c)
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{
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String tmp;
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Rune r, *rp;
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size_t rlen;
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char *s, *end;
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size_t n, rlen;
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char *s, *end, buf[UTFmax];
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if (!in_range(c))
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return;
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@ -1580,8 +1583,6 @@ cmd_y(Cmd *c)
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if (*rp == r)
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break;
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if (*rp) { /* found r in set1, replace with Rune from set2 */
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size_t n;
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char buf[UTFmax];
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n = runetochar(buf, c->u.y.set2 + (rp - c->u.y.set1));
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strnacat(&genbuf, buf, n);
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} else {
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