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Diffstat (limited to 'src/thwbrk/thwbrk.c')
| -rw-r--r-- | src/thwbrk/thwbrk.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/thwbrk/thwbrk.c b/src/thwbrk/thwbrk.c new file mode 100644 index 0000000..8543df9 --- /dev/null +++ b/src/thwbrk/thwbrk.c @@ -0,0 +1,127 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * libthai - Thai Language Support Library + * Copyright (C) 2001 Theppitak Karoonboonyanan <thep@linux.thai.net> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* + * thwbrk.c - Thai word break routine, wide char version + * Created 2001-07-15 + * Author: Theppitak Karoonboonyanan <thep@linux.thai.net> + */ + +#include <stdio.h> +#include <string.h> +#include <stdint.h> +#include <stdlib.h> + +#include <thai/thailib.h> +#include <thai/thwchar.h> +#include <thai/thbrk.h> + + +/** + * @brief Find word break positions in Thai wide-char string + * + * @param s : the input string to be processed + * @param pos : array to keep breaking positions + * @param n : size of @a pos[] + * + * @return the actual number of breaking positions occurred + * + * Finds word break positions in Thai string @a s and stores at most @a n + * breaking positions in @a pos[], from left to right. + */ +int +th_wbrk (const thwchar_t *s, int pos[], size_t n) +{ + thchar_t* tis_str; + size_t alloc_size; + int ret; + + /* convert to tis-620 string */ + alloc_size = wcslen (s) + 1; + tis_str = malloc (alloc_size); + if (!tis_str) + return 0; + th_uni2tis_line (s, tis_str, alloc_size); + + /* do word break */ + ret = th_brk (tis_str, pos, n); + + free (tis_str); + + return ret; +} + +/** + * @brief Insert word delimitors in given wide-char string + * + * @param in : the input wide-char string to be processed + * @param out : the output wide-char buffer + * @param n : the size of @a out (as number of elements) + * @param delim : the wide-char word delimitor to insert + * + * @return the actual size of the processed string (as number of elements) + * + * Analyzes the input string and store the string in output buffer + * with the given word delimitor inserted at every word boundary. + */ +int +th_wbrk_line (const thwchar_t *in, thwchar_t *out, size_t n, + const thwchar_t* delim ) +{ + int *brk_pos; + size_t n_brk_pos, i, j; + int delim_len; + thwchar_t *p_out; + + n_brk_pos = wcslen (in); + if (n_brk_pos > SIZE_MAX / sizeof (int)) + return 0; + brk_pos = (int *) malloc (n_brk_pos * sizeof (int)); + if (!brk_pos) + return 0; + + n_brk_pos = th_wbrk (in, brk_pos, n_brk_pos); + + delim_len = wcslen (delim); + for (i = j = 0, p_out = out; n > 1 && i < n_brk_pos; i++) { + while (n > 1 && j < brk_pos[i]) { + *p_out++ = in[j++]; + --n; + } + if (n > delim_len + 1) { + wcscpy (p_out, delim); + p_out += delim_len; + n -= delim_len; + } + } + while (n > 1 && in [j]) { + *p_out++ = in[j++]; + --n; + } + *p_out = 0; + + free (brk_pos); + + return p_out - out; +} + +/* +vi:ts=4:ai:expandtab +*/ |