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L10n: improves performance

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李通洲
2026-08-16 10:27:20 +08:00
parent 233c481f7a
commit 45f9de6cd2
1 changed files with 53 additions and 31 deletions
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src/options/display.c
+53 -31
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@@ -19,53 +19,75 @@
static uint32_t optionParseLanguageString(FFstrbuf* language) {
if (language->length == 0) {
#if !FF_MODULE_DISABLE_LOCALE
ffDetectLocale(language);
const char* error = ffDetectLocale(language);
if (__builtin_expect(error != nullptr, false)) {
fprintf(stderr, "ffDetectLocale: %s\n", error);
exit(477);
}
#else
fputs("Error: --key-language requires a value\n", stderr);
exit(477);
#endif
}
ffStrbufSubstrBeforeFirstC(language, '.'); // Remove the encoding part of the locale
#if __linux__
ffStrbufSubstrBeforeFirstC(language, '@'); // Remove the modifier part of the locale (Linux only)
#endif
ffStrbufLowerCase(language);
if (language->length <= 1) {
if (language->chars[0] == 'c') {
return offsetof(FFModuleDisplayName, en);
} else {
goto error;
}
} else if (language->length > 2) {
if (language->chars[2] == '-') {
language->chars[2] = '_';
} else if (__builtin_expect(language->chars[2] != '_', false)) {
goto error;
}
}
// The language code is expected to be in the format of "en", "en_US", "de", "de_DE", etc.
// First try to match the full language code, then try to match just the first two characters (the language part).
// If no match is found, report a language not supported error.
// en_US -> offsetof(FFModuleDisplayName, en)
// de_DE -> offsetof(FFModuleDisplayName, de)
// en -> offsetof(FFModuleDisplayName, en)
// zh_CN -> offsetof(FFModuleDisplayName, zh_CN)
// ar -> Error: Language 'ar' is not supported
// zh -> Error: Language 'zh' is not supported. This is an intentional design decision, as the language code 'zh' could refer to either Simplified or Traditional Chinese.
// Try to match the full language code, e.g. "en", "pt_BR", "zh_CN"
static const FFKeyValuePair pairs[] = {
{ "en", offsetof(FFModuleDisplayName, en) },
{ "de", offsetof(FFModuleDisplayName, de) },
{ "es", offsetof(FFModuleDisplayName, es) },
{ "fr", offsetof(FFModuleDisplayName, fr) },
{ "it", offsetof(FFModuleDisplayName, it) },
{ "ja", offsetof(FFModuleDisplayName, ja) },
{ "ko", offsetof(FFModuleDisplayName, ko) },
{ "pl", offsetof(FFModuleDisplayName, pl) },
{ "pt_BR", offsetof(FFModuleDisplayName, pt_BR) },
{ "ru", offsetof(FFModuleDisplayName, ru) },
{ "zh_CN", offsetof(FFModuleDisplayName, zh_CN) },
{ "zh_TW", offsetof(FFModuleDisplayName, zh_TW) },
{},
};
for (const FFKeyValuePair* pair = pairs; pair->key; ++pair) {
if (ffStrbufIgnCaseEqualS(language, pair->key)) {
return (uint32_t) pair->value;
}
}
// Try to match just the first two characters (the language part), e.g. "en" from "en_US", "de" from "de_DE"
if (language->length >= 2) {
for (const FFKeyValuePair* pair = pairs; pair->key; ++pair) {
if (ffStrbufStartsWithIgnCaseS(language, pair->key)) {
return (uint32_t) pair->value;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmultichar"
switch (language->chars[0] << 8 | language->chars[1]) {
case 'en': return offsetof(FFModuleDisplayName, en);
case 'de': return offsetof(FFModuleDisplayName, de);
case 'es': return offsetof(FFModuleDisplayName, es);
case 'fr': return offsetof(FFModuleDisplayName, fr);
case 'it': return offsetof(FFModuleDisplayName, it);
case 'ja': return offsetof(FFModuleDisplayName, ja);
case 'ko': return offsetof(FFModuleDisplayName, ko);
case 'pl': return offsetof(FFModuleDisplayName, pl);
case 'pt': {
if (ffStrbufEqualS(language, "pt_br")) {
return offsetof(FFModuleDisplayName, pt_BR);
}
goto error;
}
case 'ru': return offsetof(FFModuleDisplayName, ru);
case 'zh': {
if (ffStrbufEqualS(language, "zh_cn")) {
return offsetof(FFModuleDisplayName, zh_CN);
} else if (ffStrbufEqualS(language, "zh_tw")) {
return offsetof(FFModuleDisplayName, zh_TW);
}
goto error;
}
}
#pragma GCC diagnostic pop
error:
fprintf(stderr, "Error: Language '%s' is not supported\n", language->chars);
exit(477);
}