68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* normalize.h
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The normalize module provides several options for preprocessing full strings:
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- Unicode normalization (NFD/decomposition)
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- Transliteration (including Latin-ASCII)
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- Accent mark removal
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- UTF-8 lowercasing with utf8proc
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As well as normalizations for individual string tokens:
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- Replace hyphens with space e.g. "quatre-vignt" => "quatre vignt"
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- Delete hyphens e.g. "auto-estrada" => "autoestrada"
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- Delete final period "R." => "R"
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- Delete acronym periods: "U.S.A." => "USA"
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- Drop English possessive "Janelle's" => "Janelle"
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- Delete other apostrophes "O'Malley" => "OMalley" (not appropriate for Latin languages, use elision separation)
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*/
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#ifndef NORMALIZE_H
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#define NORMALIZE_H
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include "constants.h"
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#include "klib/khash.h"
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#include "string_utils.h"
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#include "utf8proc/utf8proc.h"
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#include "unicode_scripts.h"
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#include "transliterate.h"
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#include "trie.h"
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#include "tokens.h"
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#include "vector.h"
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#define NORMALIZE_STRING_LATIN_ASCII 1 << 0
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#define NORMALIZE_STRING_TRANSLITERATE 1 << 1
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#define NORMALIZE_STRING_STRIP_ACCENTS 1 << 2
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#define NORMALIZE_STRING_DECOMPOSE 1 << 3
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#define NORMALIZE_STRING_LOWERCASE 1 << 4
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#define NORMALIZE_STRING_TRIM 1 << 5
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#define NORMALIZE_TOKEN_REPLACE_HYPHENS 1 << 0
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#define NORMALIZE_TOKEN_DELETE_HYPHENS 1 << 1
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#define NORMALIZE_TOKEN_DELETE_FINAL_PERIOD 1 << 2
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#define NORMALIZE_TOKEN_DELETE_ACRONYM_PERIODS 1 << 3
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#define NORMALIZE_TOKEN_DROP_ENGLISH_POSSESSIVES 1 << 4
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#define NORMALIZE_TOKEN_DELETE_OTHER_APOSTROPHE 1 << 5
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#define NORMALIZE_TOKEN_SPLIT_ALPHA_FROM_NUMERIC 1 << 6
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char *normalize_string_utf8(char *str, uint64_t options);
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char *normalize_string_latin(char *str, size_t len, uint64_t options);
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// Takes NORMALIZE_TOKEN_* options
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void normalize_token(cstring_array *array, char *str, token_t token, uint64_t options);
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// Takes NORMALIZE_STRING_* options
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string_tree_t *normalize_string(char *str, uint64_t options);
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#endif |