diff options
Diffstat (limited to 'src/include/utils/pg_locale.h')
| -rw-r--r-- | src/include/utils/pg_locale.h | 54 |
1 files changed, 53 insertions, 1 deletions
diff --git a/src/include/utils/pg_locale.h b/src/include/utils/pg_locale.h index 7b8cbf58d2c..44ff60a25b4 100644 --- a/src/include/utils/pg_locale.h +++ b/src/include/utils/pg_locale.h @@ -12,6 +12,8 @@ #ifndef _PG_LOCALE_ #define _PG_LOCALE_ +#include "mb/pg_wchar.h" + #ifdef USE_ICU #include <unicode/ucol.h> #endif @@ -77,6 +79,52 @@ struct collate_methods bool strxfrm_is_safe; }; +struct ctype_methods +{ + /* case mapping: LOWER()/INITCAP()/UPPER() */ + size_t (*strlower) (char *dest, size_t destsize, + const char *src, ssize_t srclen, + pg_locale_t locale); + size_t (*strtitle) (char *dest, size_t destsize, + const char *src, ssize_t srclen, + pg_locale_t locale); + size_t (*strupper) (char *dest, size_t destsize, + const char *src, ssize_t srclen, + pg_locale_t locale); + size_t (*strfold) (char *dest, size_t destsize, + const char *src, ssize_t srclen, + pg_locale_t locale); + + /* required */ + bool (*wc_isdigit) (pg_wchar wc, pg_locale_t locale); + bool (*wc_isalpha) (pg_wchar wc, pg_locale_t locale); + bool (*wc_isalnum) (pg_wchar wc, pg_locale_t locale); + bool (*wc_isupper) (pg_wchar wc, pg_locale_t locale); + bool (*wc_islower) (pg_wchar wc, pg_locale_t locale); + bool (*wc_isgraph) (pg_wchar wc, pg_locale_t locale); + bool (*wc_isprint) (pg_wchar wc, pg_locale_t locale); + bool (*wc_ispunct) (pg_wchar wc, pg_locale_t locale); + bool (*wc_isspace) (pg_wchar wc, pg_locale_t locale); + pg_wchar (*wc_toupper) (pg_wchar wc, pg_locale_t locale); + pg_wchar (*wc_tolower) (pg_wchar wc, pg_locale_t locale); + + /* required */ + bool (*char_is_cased) (char ch, pg_locale_t locale); + + /* + * Optional. If defined, will only be called for single-byte encodings. If + * not defined, or if the encoding is multibyte, will fall back to + * pg_strlower(). + */ + char (*char_tolower) (unsigned char ch, pg_locale_t locale); + + /* + * For regex and pattern matching efficiency, the maximum char value + * supported by the above methods. If zero, limit is set by regex code. + */ + pg_wchar max_chr; +}; + /* * We use a discriminated union to hold either a locale_t or an ICU collator. * pg_locale_t is occasionally checked for truth, so make it a pointer. @@ -95,13 +143,13 @@ struct collate_methods */ struct pg_locale_struct { - char provider; bool deterministic; bool collate_is_c; bool ctype_is_c; bool is_default; const struct collate_methods *collate; /* NULL if collate_is_c */ + const struct ctype_methods *ctype; /* NULL if ctype_is_c */ union { @@ -125,6 +173,10 @@ extern void init_database_collation(void); extern pg_locale_t pg_newlocale_from_collation(Oid collid); extern char *get_collation_actual_version(char collprovider, const char *collcollate); + +extern bool char_is_cased(char ch, pg_locale_t locale); +extern bool char_tolower_enabled(pg_locale_t locale); +extern char char_tolower(unsigned char ch, pg_locale_t locale); extern size_t pg_strlower(char *dst, size_t dstsize, const char *src, ssize_t srclen, pg_locale_t locale); |