147 lines
2.9 KiB
C
147 lines
2.9 KiB
C
/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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COntributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <stdlib.h>
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#include "charset.h"
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#include "stringtrans.h"
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/* Global variable. */
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enum encoding_method encoding_method = ENC_UCS4;
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void *xmalloc (size_t __n);
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void *xrealloc (void *__p, size_t __n);
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#define ADDC(ch) \
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do \
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{ \
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if (bufact == bufmax) \
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{ \
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bufmax *= 2; \
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buf = xrealloc (buf, bufmax); \
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} \
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buf[bufact++] = (ch); \
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} \
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while (0)
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char *
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translate_string (char *str, struct charset_t *charset)
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{
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char *buf;
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size_t bufact = 0;
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size_t bufmax = 56;
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buf = (char *) xmalloc (bufmax);
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while (str[0] != '\0')
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{
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char *tp;
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unsigned int value;
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if (str[0] != '<')
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{
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ADDC (*str++);
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continue;
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}
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tp = &str[1];
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while (tp[0] != '\0' && tp[0] != '>')
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if (tp[0] == '\\')
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if (tp[1] != '\0')
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tp += 2;
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else
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++tp;
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else
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++tp;
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if (tp[0] == '\0')
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{
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free (buf);
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return NULL;
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}
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value = charset_find_value (charset, str + 1, tp - (str + 1));
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if (value == ILLEGAL_CHAR_VALUE)
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{
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free (buf);
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return NULL;
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}
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else
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{
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/* Encode string using current method. */
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char *cp;
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if (bufmax - bufact < 8)
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{
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bufmax *= 2;
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buf = (char *) xrealloc (buf, bufmax);
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}
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cp = &buf[bufact];
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if (encode_char (value, &cp) < 0)
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{
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free (buf);
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return NULL;
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}
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bufact = cp - buf;
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}
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str = &tp[1];
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}
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ADDC ('\0');
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return buf;;
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}
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int
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encode_char (unsigned int value, char **cpp)
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{
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switch (encoding_method)
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{
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case ENC_UCS1:
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if (value > 255)
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return -11;
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*(*cpp)++ = (char) value;
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break;
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case ENC_UCS4:
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*(*cpp)++ = (char) (value >> 24);
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*(*cpp)++ = (char) ((value >> 16) & 0xff);
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*(*cpp)++ = (char) ((value >> 8) & 0xff);
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*(*cpp)++ = (char) (value & 0xff);
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break;
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default:
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return -1;
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}
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return 0;
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}
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