1 /* Convert characters in input buffer using conversion descriptor to
3 Copyright (C) 1997, 1998 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If not,
19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/param.h>
29 __gconv (gconv_t cd, const char **inbuf, const char *inbufend, char **outbuf,
30 char *outbufend, size_t *converted)
32 size_t last_step = cd->nsteps - 1;
35 if (cd == (gconv_t) -1L)
36 return GCONV_ILLEGAL_DESCRIPTOR;
38 assert (converted != NULL);
41 if (inbuf == NULL || *inbuf == NULL)
43 result = (*cd->steps->fct) (cd->steps, cd->data, NULL, NULL, converted, 1);
46 const char *last_start;
48 assert (outbuf != NULL && *outbuf != NULL);
49 cd->data[last_step].outbuf = *outbuf;
50 cd->data[last_step].outbufend = outbufend;
54 /* See whether the input size is reasoable for the output
55 size. If not adjust it. */
56 size_t inlen = ((inbufend - *inbuf) / cd->steps->max_needed_from
57 * cd->steps->max_needed_from);
60 inlen = MIN (inlen, (((outbufend - cd->data[last_step].outbuf)
61 / cd->steps[last_step].max_needed_to)
62 * cd->steps[last_step].max_needed_to));
65 result = (*cd->steps->fct) (cd->steps, cd->data, inbuf,
66 *inbuf + inlen, converted, 0);
68 while (result == GCONV_EMPTY_INPUT && last_start != *inbuf
69 && *inbuf + cd->steps->min_needed_from <= inbufend);
72 if (outbuf != NULL && *outbuf != NULL)
73 *outbuf = cd->data[last_step].outbuf;