diff options
Diffstat (limited to 'iconv/gconv_open.c')
| -rw-r--r-- | iconv/gconv_open.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/iconv/gconv_open.c b/iconv/gconv_open.c new file mode 100644 index 0000000000..0e789df896 --- /dev/null +++ b/iconv/gconv_open.c @@ -0,0 +1,123 @@ +/* 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; +} |