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Refactor string case conversion into provider-specific files.

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Create API entry points pg_strlower(), etc., that work with any
provider and give the caller control over the destination
buffer. Then, move provider-specific logic into pg_locale_builtin.c,
pg_locale_icu.c, and pg_locale_libc.c as appropriate.

Discussion: https://postgr.es/m/7aa46d77b377428058403723440862d12a8a129a.camel@j-davis.com
This commit is contained in:
Jeff Davis
2024-12-16 09:35:18 -08:00
parent de1e298857
commit 86a5d6006a
6 changed files with 676 additions and 418 deletions
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78
src/backend/utils/adt/pg_locale.c
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@@ -116,6 +116,27 @@ extern size_t strnxfrm_libc(char *dest, size_t destsize,
const char *src, ssize_t srclen,
pg_locale_t locale);
extern size_t strlower_builtin(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strtitle_builtin(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strupper_builtin(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strlower_icu(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strtitle_icu(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strupper_icu(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strlower_libc(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strtitle_libc(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
extern size_t strupper_libc(char *dst, size_t dstsize, const char *src,
ssize_t srclen, pg_locale_t locale);
/* GUC settings */
char *locale_messages;
char *locale_monetary;
@@ -1468,6 +1489,63 @@ get_collation_actual_version(char collprovider, const char *collcollate)
return collversion;
}
size_t
pg_strlower(char *dst, size_t dstsize, const char *src, ssize_t srclen,
pg_locale_t locale)
{
if (locale->provider == COLLPROVIDER_BUILTIN)
return strlower_builtin(dst, dstsize, src, srclen, locale);
#ifdef USE_ICU
else if (locale->provider == COLLPROVIDER_ICU)
return strlower_icu(dst, dstsize, src, srclen, locale);
#endif
else if (locale->provider == COLLPROVIDER_LIBC)
return strlower_libc(dst, dstsize, src, srclen, locale);
else
/* shouldn't happen */
PGLOCALE_SUPPORT_ERROR(locale->provider);
return 0; /* keep compiler quiet */
}
size_t
pg_strtitle(char *dst, size_t dstsize, const char *src, ssize_t srclen,
pg_locale_t locale)
{
if (locale->provider == COLLPROVIDER_BUILTIN)
return strtitle_builtin(dst, dstsize, src, srclen, locale);
#ifdef USE_ICU
else if (locale->provider == COLLPROVIDER_ICU)
return strtitle_icu(dst, dstsize, src, srclen, locale);
#endif
else if (locale->provider == COLLPROVIDER_LIBC)
return strtitle_libc(dst, dstsize, src, srclen, locale);
else
/* shouldn't happen */
PGLOCALE_SUPPORT_ERROR(locale->provider);
return 0; /* keep compiler quiet */
}
size_t
pg_strupper(char *dst, size_t dstsize, const char *src, ssize_t srclen,
pg_locale_t locale)
{
if (locale->provider == COLLPROVIDER_BUILTIN)
return strupper_builtin(dst, dstsize, src, srclen, locale);
#ifdef USE_ICU
else if (locale->provider == COLLPROVIDER_ICU)
return strupper_icu(dst, dstsize, src, srclen, locale);
#endif
else if (locale->provider == COLLPROVIDER_LIBC)
return strupper_libc(dst, dstsize, src, srclen, locale);
else
/* shouldn't happen */
PGLOCALE_SUPPORT_ERROR(locale->provider);
return 0; /* keep compiler quiet */
}
/*
* pg_strcoll
*