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glibc/iconv/gconv.c
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/* Convert characters in input buffer using conversion descriptor to | |
output buffer. | |
Copyright (C) 1997-2001, 2005, 2007 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, write to the Free | |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
02111-1307 USA. */ | |
#include <assert.h> | |
#include <dlfcn.h> | |
#include <stddef.h> | |
#include <sys/param.h> | |
#include <gconv_int.h> | |
#include <sysdep.h> | |
int | |
internal_function | |
__gconv (__gconv_t cd, const unsigned char **inbuf, | |
const unsigned char *inbufend, unsigned char **outbuf, | |
unsigned char *outbufend, size_t *irreversible) | |
{ | |
size_t last_step; | |
int result; | |
if (cd == (__gconv_t) -1L) | |
return __GCONV_ILLEGAL_DESCRIPTOR; | |
last_step = cd->__nsteps - 1; | |
assert (irreversible != NULL); | |
*irreversible = 0; | |
cd->__data[last_step].__outbuf = outbuf != NULL ? *outbuf : NULL; | |
cd->__data[last_step].__outbufend = outbufend; | |
__gconv_fct fct = cd->__steps->__fct; | |
#ifdef PTR_DEMANGLE | |
if (cd->__steps->__shlib_handle != NULL) | |
PTR_DEMANGLE (fct); | |
#endif | |
if (inbuf == NULL || *inbuf == NULL) | |
{ | |
/* We just flush. */ | |
result = DL_CALL_FCT (fct, | |
(cd->__steps, cd->__data, NULL, NULL, NULL, | |
irreversible, | |
cd->__data[last_step].__outbuf == NULL ? 2 : 1, | |
0)); | |
/* If the flush was successful clear the rest of the state. */ | |
if (result == __GCONV_OK) | |
for (size_t cnt = 0; cnt <= last_step; ++cnt) | |
cd->__data[cnt].__invocation_counter = 0; | |
} | |
else | |
{ | |
const unsigned char *last_start; | |
assert (outbuf != NULL && *outbuf != NULL); | |
do | |
{ | |
last_start = *inbuf; | |
result = DL_CALL_FCT (fct, | |
(cd->__steps, cd->__data, inbuf, inbufend, | |
NULL, irreversible, 0, 0)); | |
} | |
while (result == __GCONV_EMPTY_INPUT && last_start != *inbuf | |
&& *inbuf + cd->__steps->__min_needed_from <= inbufend); | |
} | |
if (outbuf != NULL && *outbuf != NULL) | |
*outbuf = cd->__data[last_step].__outbuf; | |
return result; | |
} |