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Fix pattern substitution

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Ed was falling doing substitution different of the first or all
(s//%/, s//%/\1, s//%/g), because it was not adding the matches
which were not going to be substituted.
This commit is contained in:
Roberto E. Vargas Caballero 2016-01-07 11:44:49 +01:00 committed by sin
parent 54ad6d512b
commit 0b117ab6c0
1 changed files with 15 additions and 11 deletions
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26
ed.c
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@ -957,12 +957,20 @@ addpost(char **s, size_t *cap, size_t *siz)
*s = addchar('\0', *s, cap, siz);
}
static void
addsub(char **s, size_t *cap, size_t *siz)
static int
addsub(char **s, size_t *cap, size_t *siz, int nth, int nmatch)
{
char *end, *q, *p, c;
int sub;
if (nth != nmatch && nth != -1) {
q = lastmatch + matchs[0].rm_so;
end = lastmatch + matchs[0].rm_eo;
while (q < end)
*s = addchar(*q++, *s, cap, siz);
return 0;
}
for (p = rhs; (c = *p); ++p) {
switch (c) {
case '&':
@ -970,7 +978,7 @@ addsub(char **s, size_t *cap, size_t *siz)
goto copy_match;
case '\\':
if ((c = *++p) == '\0')
return;
return 1;
if (!isdigit(c))
goto copy_char;
sub = c - '0';
@ -986,24 +994,20 @@ addsub(char **s, size_t *cap, size_t *siz)
break;
}
}
return 1;
}
static void
subline(int num, int nth)
{
int m, changed;
int i, m, changed;
static char *s;
static size_t siz, cap;
siz = 0;
i = changed = siz = 0;
for (m = match(num); m; m = rematch(num)) {
addpre(&s, &cap, &siz);
if (--nth > 0)
continue;
changed = 1;
addsub(&s, &cap, &siz);
if (nth == 0)
break;
changed |= addsub(&s, &cap, &siz, nth, ++i);
}
if (!changed)
return;