Mercurial > dovecot > original-hg > dovecot-1.2
view src/lib/unichar.h @ 9451:9fff30644260 HEAD
istream-concat: Fixed a lot of bugs.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Mon, 26 Oct 2009 17:06:57 -0400 |
parents | fcce76948c8a |
children | bf2fb1679cb4 |
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#ifndef UNICHAR_H #define UNICHAR_H /* Character used to replace invalid input. */ #define UNICODE_REPLACEMENT_CHAR 0xfffd /* Characters >= base require surrogates */ #define UTF16_SURROGATE_BASE 0x10000 #define UTF16_SURROGATE_SHIFT 10 #define UTF16_SURROGATE_MASK 0x03ff #define UTF16_SURROGATE_HIGH_FIRST 0xd800 #define UTF16_SURROGATE_HIGH_LAST 0xdbff #define UTF16_SURROGATE_HIGH_MAX 0xdfff #define UTF16_SURROGATE_LOW_FIRST 0xdc00 #define UTF16_SURROGATE_LOW_LAST 0xdfff #define UTF16_SURROGATE_HIGH(chr) \ (UTF16_SURROGATE_HIGH_FIRST + \ (((chr) - UTF16_SURROGATE_BASE) >> UTF16_SURROGATE_SHIFT)) #define UTF16_SURROGATE_LOW(chr) \ (UTF16_SURROGATE_LOW_FIRST + \ (((chr) - UTF16_SURROGATE_BASE) & UTF16_SURROGATE_MASK)) typedef uint32_t unichar_t; ARRAY_DEFINE_TYPE(unichars, unichar_t); extern const uint8_t *const uni_utf8_non1_bytes; /* Returns number of characters in a NUL-terminated unicode string */ unsigned int uni_strlen(const unichar_t *str) ATTR_PURE; /* Translates UTF-8 input to UCS-4 output. Returns 0 if ok, -1 if input was invalid */ int uni_utf8_to_ucs4(const char *input, ARRAY_TYPE(unichars) *output); /* Translates UCS-4 input to UTF-8 output. */ void uni_ucs4_to_utf8(const unichar_t *input, size_t len, buffer_t *output); void uni_ucs4_to_utf8_c(unichar_t chr, buffer_t *output); /* Returns 1 if *chr_r is set, 0 for incomplete trailing character, -1 for invalid input. */ int uni_utf8_get_char(const char *input, unichar_t *chr_r); int uni_utf8_get_char_n(const void *input, size_t max_len, unichar_t *chr_r); /* Returns UTF-8 string length with maximum input size. */ unsigned int uni_utf8_strlen_n(const void *input, size_t size) ATTR_PURE; /* Returns the number of bytes belonging to this partial UTF-8 character. Invalid input is returned with length 1. */ static inline unsigned int ATTR_CONST uni_utf8_char_bytes(char chr) { /* 0x00 .. 0x7f are ASCII. 0x80 .. 0xC1 are invalid. */ if ((uint8_t)chr < (192 + 2)) return 1; return uni_utf8_non1_bytes[(uint8_t)chr - (192 + 2)]; } /* Return given character in titlecase. */ unichar_t uni_ucs4_to_titlecase(unichar_t chr) ATTR_CONST; /* Convert UTF-8 input to titlecase and decompose the titlecase characters to output buffer. Returns 0 if ok, -1 if input was invalid. This generates output that's compatible with i;unicode-casemap comparator. Invalid input is replaced with unicode replacement character (0xfffd). */ int uni_utf8_to_decomposed_titlecase(const void *input, size_t max_len, buffer_t *output); /* If input contains only valid UTF-8 characters, return TRUE without updating buf. If input contains invalid UTF-8 characters, replace them with unicode replacement character (0xfffd), write the output to buf and return FALSE. */ bool uni_utf8_get_valid_data(const unsigned char *input, size_t size, buffer_t *buf); #endif