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glibc/iconv/iconv.c
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/* Convert characters in input buffer using conversion descriptor to | |
output buffer. | |
Copyright (C) 1997-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
The GNU C 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. | |
The GNU C 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 the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <stddef.h> /* for NULL */ | |
#include <errno.h> | |
#include <iconv.h> | |
#include <gconv_int.h> | |
#include <assert.h> | |
size_t | |
iconv (iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, | |
size_t *outbytesleft) | |
{ | |
__gconv_t gcd = (__gconv_t) cd; | |
char *outstart = outbuf ? *outbuf : NULL; | |
size_t irreversible; | |
int result; | |
if (__glibc_unlikely (inbuf == NULL || *inbuf == NULL)) | |
{ | |
if (outbuf == NULL || *outbuf == NULL) | |
result = __gconv (gcd, NULL, NULL, NULL, NULL, &irreversible); | |
else | |
result = __gconv (gcd, NULL, NULL, (unsigned char **) outbuf, | |
(unsigned char *) (outstart + *outbytesleft), | |
&irreversible); | |
} | |
else | |
{ | |
const char *instart = *inbuf; | |
result = __gconv (gcd, (const unsigned char **) inbuf, | |
(const unsigned char *) (*inbuf + *inbytesleft), | |
(unsigned char **) outbuf, | |
(unsigned char *) (*outbuf + *outbytesleft), | |
&irreversible); | |
*inbytesleft -= *inbuf - instart; | |
} | |
if (outstart != NULL) | |
*outbytesleft -= *outbuf - outstart; | |
switch (__builtin_expect (result, __GCONV_OK)) | |
{ | |
case __GCONV_ILLEGAL_DESCRIPTOR: | |
__set_errno (EBADF); | |
irreversible = (size_t) -1L; | |
break; | |
case __GCONV_ILLEGAL_INPUT: | |
__set_errno (EILSEQ); | |
irreversible = (size_t) -1L; | |
break; | |
case __GCONV_FULL_OUTPUT: | |
__set_errno (E2BIG); | |
irreversible = (size_t) -1L; | |
break; | |
case __GCONV_INCOMPLETE_INPUT: | |
__set_errno (EINVAL); | |
irreversible = (size_t) -1L; | |
break; | |
case __GCONV_EMPTY_INPUT: | |
case __GCONV_OK: | |
/* Nothing. */ | |
break; | |
default: | |
assert (!"Nothing like this should happen"); | |
} | |
return irreversible; | |
} |