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(fontset_pattern_regexp): Escape some regexp characters.

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This commit is contained in:
Kenichi Handa 2008-06-17 01:26:47 +00:00
parent 3554e566e3
commit 821bc4dbf1
2 changed files with 18 additions and 7 deletions
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5
src/ChangeLog
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@ -1,3 +1,8 @@
2008-06-17 Naohiro Aota <nao.aota@gmail.com> (tiny change)
* fontset.c (fontset_pattern_regexp): Escape some reg-expr
characters.
2008-06-16 Juanma Barranquero <lekktu@gmail.com>
* dispextern.h (lookup_non_ascii_face, split_font_name_into_vector)

20
src/fontset.c
View file

@ -1005,7 +1005,7 @@ fontset_pattern_regexp (pattern)
{
/* We must at first update the cached data. */
unsigned char *regex, *p0, *p1;
int ndashes = 0, nstars = 0, nplus = 0;
int ndashes = 0, nstars = 0, nescs = 0;
for (p0 = SDATA (pattern); *p0; p0++)
{
@ -1013,17 +1013,20 @@ fontset_pattern_regexp (pattern)
ndashes++;
else if (*p0 == '*')
nstars++;
else if (*p0 == '+')
nplus++;
else if (*p0 == '['
|| *p0 == '.' || *p0 == '\\'
|| *p0 == '+' || *p0 == '^'
|| *p0 == '$')
nescs++;
}
/* If PATTERN is not full XLFD we conert "*" to ".*". Otherwise
we convert "*" to "[^-]*" which is much faster in regular
expression matching. */
if (ndashes < 14)
p1 = regex = (unsigned char *) alloca (SBYTES (pattern) + 2 * nstars + 2 * nplus + 1);
p1 = regex = (unsigned char *) alloca (SBYTES (pattern) + 2 * nstars + 2 * nescs + 1);
else
p1 = regex = (unsigned char *) alloca (SBYTES (pattern) + 5 * nstars + 2 * nplus + 1);
p1 = regex = (unsigned char *) alloca (SBYTES (pattern) + 5 * nstars + 2 * nescs + 1);
*p1++ = '^';
for (p0 = SDATA (pattern); *p0; p0++)
@ -1038,8 +1041,11 @@ fontset_pattern_regexp (pattern)
}
else if (*p0 == '?')
*p1++ = '.';
else if (*p0 == '+')
*p1++ = '\\', *p1++ = '+';
else if (*p0 == '['
|| *p0 == '.' || *p0 == '\\'
|| *p0 == '+' || *p0 == '^'
|| *p0 == '$')
*p1++ = '\\', *p1++ = *p0;
else
*p1++ = *p0;
}