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skip_prefix: add case-insensitive variant 

We have the convenient skip_prefix() helper, but if you want
to do case-insensitive matching, you're stuck doing it by
hand. We could add an extra parameter to the function to
let callers ask for this, but the function is small and
somewhat performance-critical. Let's just re-implement it
for the case-insensitive version.

Signed-off-by: Jeff King <peff@peff.net>
This commit is contained in:
Jeff King 2018-05-13 12:57:14 -04:00
parent dc2d9ba318
commit 41a80924ae
1 changed files with 17 additions and 0 deletions
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17
git-compat-util.h
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@ -956,6 +956,23 @@ static inline int sane_iscase(int x, int is_lower)
return (x & 0x20) == 0;
}
/*
* Like skip_prefix, but compare case-insensitively. Note that the comparison
* is done via tolower(), so it is strictly ASCII (no multi-byte characters or
* locale-specific conversions).
*/
static inline int skip_iprefix(const char *str, const char *prefix,
const char **out)
{
do {
if (!*prefix) {
*out = str;
return 1;
}
} while (tolower(*str++) == tolower(*prefix++));
return 0;
}
static inline int strtoul_ui(char const *s, int base, unsigned int *result)
{
unsigned long ul;