diff options
Diffstat (limited to 'src/include/mb/pg_wchar.h')
| -rw-r--r-- | src/include/mb/pg_wchar.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/include/mb/pg_wchar.h b/src/include/mb/pg_wchar.h index b8892ef730e..494aefc7fab 100644 --- a/src/include/mb/pg_wchar.h +++ b/src/include/mb/pg_wchar.h @@ -316,6 +316,15 @@ typedef enum pg_enc #define MAX_CONVERSION_GROWTH 4 /* + * Maximum byte length of the string equivalent to any one Unicode code point, + * in any backend encoding. The current value assumes that a 4-byte UTF-8 + * character might expand by MAX_CONVERSION_GROWTH, which is a huge + * overestimate. But in current usage we don't allocate large multiples of + * this, so there's little point in being stingy. + */ +#define MAX_UNICODE_EQUIVALENT_STRING 16 + +/* * Table for mapping an encoding number to official encoding name and * possibly other subsidiary data. Be careful to check encoding number * before accessing a table entry! @@ -506,6 +515,12 @@ typedef uint32 (*utf_local_conversion_func) (uint32 code); * Some handy functions for Unicode-specific tests. */ static inline bool +is_valid_unicode_codepoint(pg_wchar c) +{ + return (c > 0 && c <= 0x10FFFF); +} + +static inline bool is_utf16_surrogate_first(pg_wchar c) { return (c >= 0xD800 && c <= 0xDBFF); @@ -603,6 +618,8 @@ extern char *pg_server_to_client(const char *s, int len); extern char *pg_any_to_server(const char *s, int len, int encoding); extern char *pg_server_to_any(const char *s, int len, int encoding); +extern void pg_unicode_to_server(pg_wchar c, unsigned char *s); + extern unsigned short BIG5toCNS(unsigned short big5, unsigned char *lc); extern unsigned short CNStoBIG5(unsigned short cns, unsigned char lc); |