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back out 15266

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This commit is contained in:
Peter Stephenson 2001-07-06 09:03:46 +00:00
parent a45ff6cdb7
commit 40e17d980f
3 changed files with 14 additions and 59 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2001-07-06 Peter Stephenson <pws@csr.com>
* Back out 15266: it was right before, I was looking at it
back to front.
2001-07-06 Bart Schaefer <schaefer@zsh.org> 2001-07-06 Bart Schaefer <schaefer@zsh.org>
* 15271: Src/Modules/pcre.mdd: Default to dynamic linkage only, as * 15271: Src/Modules/pcre.mdd: Default to dynamic linkage only, as

3
Doc/Zsh/expn.yo
View file

@ -793,8 +793,7 @@ flag, or with tt(${)...tt(/)...tt(}) (only the var(expr)th match is
substituted) or tt(${)...tt(//)...tt(}) (all matches from the substituted) or tt(${)...tt(//)...tt(}) (all matches from the
var(expr)th on are substituted). The var(expr)th match is counted var(expr)th on are substituted). The var(expr)th match is counted
such that there is either one or zero matches from each starting such that there is either one or zero matches from each starting
position in the string when scanning forwards, or to each finishing position in the string, although for global substitution matches
position when scanning backwards, although for global substitution matches
overlapping previous replacements are ignored. overlapping previous replacements are ignored.
) )
item(tt(M))( item(tt(M))(

65
Src/glob.c
View file

@ -2068,7 +2068,7 @@ set_pat_end(Patprog p, char null_me)
static int static int
igetmatch(char **sp, Patprog p, int fl, int n, char *replstr) igetmatch(char **sp, Patprog p, int fl, int n, char *replstr)
{ {
char *s = *sp, *t, sav, *furthestend, *longeststart, *lastend; char *s = *sp, *t, sav;
int i, l = strlen(*sp), ml = ztrlen(*sp), matched = 1; int i, l = strlen(*sp), ml = ztrlen(*sp), matched = 1;
repllist = NULL; repllist = NULL;
@ -2243,17 +2243,19 @@ igetmatch(char **sp, Patprog p, int fl, int n, char *replstr)
*sp = get_match_ret(*sp, l, l, fl, replstr); *sp = get_match_ret(*sp, l, l, fl, replstr);
patoffset = 0; patoffset = 0;
return 1; return 1;
} } /* fall through */
case (SUB_END|SUB_LONG|SUB_SUBSTR):
/* Longest/shortest at end, matching substrings. */
patoffset--; patoffset--;
for (t = s + l - 1; t >= s; t--, patoffset--) { for (t = s + l - 1; t >= s; t--, patoffset--) {
if (t > s && t[-1] == Meta) if (t > s && t[-1] == Meta)
t--; t--;
set_pat_start(p, t-s); set_pat_start(p, t-s);
if (pattry(p, t) && patinput > t && !--n) { if (pattry(p, t) && patinput > t && !--n) {
/* Found a match from this point */ /* Found the longest match */
char *mpos = patinput, *ptr; char *mpos = patinput;
if (!(p->flags & PAT_PURES)) { if (!(fl & SUB_LONG) && !(p->flags & PAT_PURES)) {
/* See if there's a shorter to anywhere */ char *ptr;
for (ptr = t; ptr < mpos; METAINC(ptr)) { for (ptr = t; ptr < mpos; METAINC(ptr)) {
sav = *ptr; sav = *ptr;
set_pat_end(p, sav); set_pat_end(p, sav);
@ -2280,57 +2282,6 @@ igetmatch(char **sp, Patprog p, int fl, int n, char *replstr)
} }
patoffset = 0; patoffset = 0;
break; break;
case (SUB_END|SUB_LONG|SUB_SUBSTR):
/*
* Longest at end, matching substrings. Scan up from
* start, remembering the furthest we got. The
* longest string to reach that point wins.
*/
furthestend = longeststart = lastend = NULL;
sav = '\0';
while (n) {
int l2 = strlen(s);
for (i = 0, t = s; i <= l2; i++, t++, patoffset++) {
set_pat_start(p, t-s);
if (pattry(p, t)) {
if (!furthestend ||
patinput - t > furthestend - longeststart) {
furthestend = patinput;
longeststart = t;
}
}
if (*t == Meta)
t++, i++;
}
if (furthestend) {
if (lastend) {
*lastend = sav;
lastend = NULL;
}
if (--n && furthestend > s) {
lastend = (furthestend > s+1 && furthestend[-2]
== Meta) ? furthestend-2 : furthestend-1;
sav = *lastend;
set_pat_end(p, sav);
*lastend = '\0';
furthestend = NULL;
patoffset = 0;
continue;
}
}
break;
}
if (lastend)
*lastend = sav;
if (!n) {
*sp = get_match_ret(*sp, longeststart-s, furthestend-s, fl,
replstr);
patoffset = 0;
return 1;
}
patoffset = 0;
break;
} }
} }