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annotate src/lib/unichar.h @ 5683:8101787cdd1c HEAD

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Rewrote some code and cleaned up the API
author Timo Sirainen <tss@iki.fi>
date Mon, 11 Jun 2007 04:37:29 +0300
parents c98008a7e9b7
children 04b9eb27283c
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4899
c98008a7e9b7 Added unichar_t UCS-4 type and some ucs4/utf8 functions.
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1 #ifndef __UNICHAR_H
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2 #define __UNICHAR_H
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3
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4 typedef uint32_t unichar_t;
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5
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6 extern const uint8_t *const uni_utf8_non1_bytes;
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7
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8 /* Returns number of characters in a NUL-terminated unicode string */
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9 unsigned int uni_strlen(const unichar_t *str);
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10 /* Translates UTF-8 input to UCS-4 output. Returns 0 if ok, -1 if input was
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11 invalid */
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12 int uni_utf8_to_ucs4(const char *input, buffer_t *output);
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13 /* Translates UCS-4 input to UTF-8 output. */
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14 void uni_ucs4_to_utf8(const unichar_t *input, size_t len, buffer_t *output);
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15 void uni_ucs4_to_utf8_c(unichar_t chr, buffer_t *output);
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17 /* Returns 1 if *chr_r is set, 0 for incomplete trailing character,
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18 -1 for invalid input. */
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19 int uni_utf8_get_char(const char *input, unichar_t *chr_r);
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20 int uni_utf8_get_char_n(const void *input, size_t max_len, unichar_t *chr_r);
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21 /* Returns UTF-8 string length with maximum input size. */
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22 unsigned int uni_utf8_strlen_n(const void *input, size_t size);
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23
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24 /* Returns the number of bytes belonging to this partial UTF-8 character.
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25 Invalid input is returned with length 1. */
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26 static inline unsigned int uni_utf8_char_bytes(char chr)
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27 {
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28 /* 0x00 .. 0x7f are ASCII. 0x80 .. 0xC1 are invalid. */
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29 if ((uint8_t)chr < (192 + 2))
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30 return 1;
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31 return uni_utf8_non1_bytes[(uint8_t)chr - (192 + 2)];
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32 }
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33
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34 #endif