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[libromdata] IsoPartition: Optimize findLastSlash() by searching for '/' and '\\' at the same time instead of calling strrchr() twice.

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This commit is contained in:
David Korth 2025-06-07 16:39:46 -04:00
parent c7ccd7a39a
commit a49fb884f1
1 changed files with 15 additions and 6 deletions
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21
src/libromdata/disc/IsoPartition.cpp
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@ -57,6 +57,15 @@ public:
// IFst::Dir* reference counter
int fstDirCount;
/**
* Is this character a slash or backslash?
* @return True if it is; false if it isn't.
*/
static inline bool is_slash(char c)
{
return (c == '/') || (c == '\\');
}
/**
* Find the last slash or backslash in a path.
* @param path Path
@ -64,14 +73,14 @@ public:
*/
static inline const char *findLastSlash(const char *path)
{
const char *sl = strrchr(path, '/');
const char *const bs = strrchr(path, '\\');
if (sl && bs) {
if (bs > sl) {
sl = bs;
size_t size = strlen(path);
const char *p = path + size - 1;
for (; size > 0; size--, p--) {
if (is_slash(*p)) {
return p;
}
}
return (sl) ? sl : bs;
return nullptr;
}
/**