124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/* Find matching transformation algorithms and initialize steps.
|
|
Copyright (C) 1997 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <gconv.h>
|
|
#include <stdlib.h>
|
|
|
|
|
|
int
|
|
__gconv_open (const char *toset, const char *fromset, gconv_t *handle)
|
|
{
|
|
struct gconv_step *steps;
|
|
size_t nsteps;
|
|
gconv_t result = NULL;
|
|
size_t cnt = 0;
|
|
int res;
|
|
|
|
res = __gconv_find_transform (toset, fromset, &steps, &nsteps);
|
|
if (res == GCONV_OK)
|
|
{
|
|
/* Allocate room for handle. */
|
|
result = (gconv_t) malloc (sizeof (struct gconv_info));
|
|
if (result == NULL)
|
|
res = GCONV_NOMEM;
|
|
else
|
|
{
|
|
/* Remember the list of steps. */
|
|
result->steps = steps;
|
|
result->nsteps = nsteps;
|
|
|
|
/* Allocate array for the step data. */
|
|
result->data = (struct gconv_step_data *)
|
|
calloc (nsteps, sizeof (struct gconv_step_data));
|
|
|
|
if (result->data == NULL)
|
|
res = GCONV_NOMEM;
|
|
else
|
|
{
|
|
/* Call all initialization functions for the transformation
|
|
step implemenations. */
|
|
struct gconv_step_data *data = result->data;
|
|
|
|
for (cnt = 0; cnt < nsteps; ++cnt)
|
|
{
|
|
/* If this is the last step we must not allocate an output
|
|
buffer. Signal this to the initializer. */
|
|
data[cnt].is_last = cnt == nsteps - 1;
|
|
|
|
if (steps[cnt].init_fct != NULL)
|
|
{
|
|
res = (steps[cnt].init_fct) (&steps[cnt], &data[cnt]);
|
|
if (res != GCONV_OK)
|
|
break;
|
|
}
|
|
else
|
|
if (!data[cnt].is_last)
|
|
{
|
|
data[cnt].outbufsize = GCONV_DEFAULT_BUFSIZE;
|
|
data[cnt].outbuf =
|
|
(char *) malloc (data[cnt].outbufsize);
|
|
if (data[cnt].outbuf == NULL)
|
|
{
|
|
res = GCONV_NOMEM;
|
|
break;
|
|
}
|
|
data[cnt].outbufavail = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (res != GCONV_OK)
|
|
{
|
|
/* Something went wrong. Free all the resources. */
|
|
int serrno = errno;
|
|
|
|
if (result != NULL)
|
|
{
|
|
if (result->data != NULL)
|
|
{
|
|
while (cnt-- > 0)
|
|
if (steps[cnt].end_fct != NULL)
|
|
(*steps[cnt].end_fct) (&result->data[cnt]);
|
|
else
|
|
{
|
|
free (result->data[cnt].outbuf);
|
|
if (result->data[cnt].data != NULL)
|
|
free (result->data[cnt].data);
|
|
}
|
|
|
|
free (result->data);
|
|
}
|
|
|
|
free (result);
|
|
result = NULL;
|
|
}
|
|
|
|
__gconv_close_transform (steps, nsteps);
|
|
|
|
__set_errno (serrno);
|
|
}
|
|
|
|
*handle = result;
|
|
return res;
|
|
}
|