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| 2 | |
| 3 | * Copyright (c) 2014 SGI.
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| 4 | * All rights reserved.
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| 5 |
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| 6 |
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| 7 | #ifndef UTF8NORM_H
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| 8 | #define UTF8NORM_H
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| 9 |
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| 10 | #include <linux/types.h>
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| 11 | #include <linux/export.h>
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| 12 | #include <linux/string.h>
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| 13 | #include <linux/module.h>
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| 14 | #include <linux/unicode.h>
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| 15 |
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| 16 | int utf8version_is_supported(const struct unicode_map *um, unsigned int version);
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| 17 |
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| 18 | |
| 19 | * Determine the length of the normalized from of the string,
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| 20 | * excluding any terminating NULL byte.
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| 21 | * Returns 0 if only ignorable code points are present.
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| 22 | * Returns -1 if the input is not valid UTF-8.
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| 23 |
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| 24 | ssize_t utf8nlen(const struct unicode_map *um, enum utf8_normalization n,
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| 25 | const char *s, size_t len);
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| 26 |
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| 27 |
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| 28 | #define UTF8HANGULLEAF (12)
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| 29 |
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| 30 | |
| 31 | * Cursor structure used by the normalizer.
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| 32 |
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| 33 | struct utf8cursor {
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| 34 | const struct unicode_map *um;
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| 35 | enum utf8_normalization n;
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| 36 | const char *s;
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| 37 | const char *p;
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| 38 | const char *ss;
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| 39 | const char *sp;
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| 40 | unsigned int len;
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| 41 | unsigned int slen;
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| 42 | short int ccc;
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| 43 | short int nccc;
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| 44 | unsigned char hangul[UTF8HANGULLEAF];
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| 45 | };
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| 46 |
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| 47 | |
| 48 | * Initialize a utf8cursor to normalize a string.
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| 49 | * Returns 0 on success.
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| 50 | * Returns -1 on failure.
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| 51 |
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| 52 | int utf8ncursor(struct utf8cursor *u8c, const struct unicode_map *um,
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| 53 | enum utf8_normalization n, const char *s, size_t len);
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| 54 |
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| 55 | |
| 56 | * Get the next byte in the normalization.
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| 57 | * Returns a value > 0 && < 256 on success.
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| 58 | * Returns 0 when the end of the normalization is reached.
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| 59 | * Returns -1 if the string being normalized is not valid UTF-8.
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| 60 |
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| 61 | extern int utf8byte(struct utf8cursor *u8c);
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| 62 |
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| 63 | struct utf8data {
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| 64 | unsigned int maxage;
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| 65 | unsigned int offset;
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| 66 | };
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| 67 |
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| 68 | struct utf8data_table {
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| 69 | const unsigned int *utf8agetab;
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| 70 | int utf8agetab_size;
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| 71 |
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| 72 | const struct utf8data *utf8nfdicfdata;
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| 73 | int utf8nfdicfdata_size;
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| 74 |
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| 75 | const struct utf8data *utf8nfdidata;
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| 76 | int utf8nfdidata_size;
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| 77 |
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| 78 | const unsigned char *utf8data;
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| 79 | };
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| 80 |
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| 81 | extern const struct utf8data_table utf8_data_table;
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| 82 |
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| 83 | #endif
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