79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <stdlib.h>
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#include <string.h>
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#include "transliteration.h"
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#include "syllable.h"
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#include "utf8.h"
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static const struct transliteration_letter *find_letter_by_code(unsigned long c,
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const struct transliteration_letter *table)
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{
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const struct transliteration_letter *walk = table;
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if (c == 0)
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return NULL;
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while (walk->code != 0) {
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if (c == walk->code)
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return walk;
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walk++;
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}
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return NULL;
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}
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static void syllable_modify(struct syllable *syllable, const char *data)
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{
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char buffer[10];
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strcpy(buffer, syllable->data);
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buffer[strlen(buffer) - 1] = 0;
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strcat(buffer, data);
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free(syllable->data);
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syllable->data = strdup(buffer);
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}
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char *transliterate_devanagari_to_latin(const char *text,
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struct transliteration_context *context)
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{
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unsigned int length = strlen(text);
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const char *ptr = text;
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const char *end = ptr + length;
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char *tmp;
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unsigned long c;
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struct syllable *head, *tail;
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const struct transliteration_letter *letter;
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head = syllable_alloc("");
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tail = head;
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while (ptr < end) {
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c = utf8_unpack_char(ptr);
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ptr += utf8_char_length(c);
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letter = find_letter_by_code(c, context->table);
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if (letter != NULL) {
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if (letter->flags & FLAG_REGULAR)
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tail = syllable_append(tail, letter->data);
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else if (letter->flags & FLAG_MODIFIER)
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syllable_modify(tail, letter->data);
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continue;
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}
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tmp = utf8_code_to_string(c);
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tail = syllable_append(tail, tmp);
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free(tmp);
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}
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return syllable_chain_to_string(head);
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}
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void transliteration_context_drop(struct transliteration_context *context)
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{
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free(context);
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}
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