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/* open-po - search for .po file along search path list and open for reading
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, April 1995.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
#endif
#if defined STDC_HEADERS || HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
#endif
#include "dir-list.h"
#include "error.h"
#include "system.h"
#include <libintl.h>
#define _(str) gettext (str)
#ifndef errno
extern int errno;
#endif
/* Prototypes for helper functions. */
extern char *xstrdup PARAMS ((const char *string));
/* This macro is used to determine the number of elements in an erray. */
#define SIZEOF(a) (sizeof(a)/sizeof(a[0]))
/* Open the input file with the name INPUT_NAME. The ending .po is added
if necessary. If INPUT_NAME is not an absolute file name and the file is
not found, the list of directories in INPUT_PATH_LIST is searched. */
FILE *
open_po_file (input_name, file_name)
const char *input_name;
char **file_name;
{
static const char *extension[] = { "", ".po", ".pot", };
FILE *ret_val;
int j, k;
const char *dir;
const char *ext;
if (strcmp (input_name, "-") == 0 || strcmp (input_name, "/dev/stdin") == 0)
{
*file_name = xstrdup (_("<stdin>"));
return stdin;
}
/* We have a real name for the input file. If the name is absolute,
try the various extensions, but ignore the directory search list. */
if (*input_name == '/')
{
for (k = 0; k < SIZEOF (extension); ++k)
{
ext = extension[k];
*file_name = xmalloc (strlen (input_name) + strlen (ext) + 1);
stpcpy (stpcpy (*file_name, input_name), ext);
ret_val = fopen (*file_name, "r");
if (ret_val != NULL || errno != ENOENT)
/* We found the file. */
return ret_val;
free (*file_name);
}
/* File does not exist. */
*file_name = xstrdup (input_name);
errno = ENOENT;
return NULL;
}
/* For relative file names, look through the directory search list,
trying the various extensions. If no directory search list is
specified, the current directory is used. */
for (j = 0; (dir = dir_list_nth (j)) != NULL; ++j)
for (k = 0; k < SIZEOF (extension); ++k)
{
ext = extension[k];
if (dir[0] == '.' && dir[1] == '\0')
{
*file_name = xmalloc (strlen(input_name) + strlen(ext) + 1);
stpcpy (stpcpy (*file_name, input_name), ext);
}
else
{
*file_name = xmalloc (strlen (dir) + strlen (input_name)
+ strlen (ext) + 2);
stpcpy (stpcpy (stpcpy (stpcpy (*file_name, dir), "/"),
input_name),
ext);
}
ret_val = fopen (*file_name, "r");
if (ret_val != NULL || errno != ENOENT)
return ret_val;
free (*file_name);
}
/* File does not exist. */
*file_name = xstrdup (input_name);
errno = ENOENT;
return NULL;
}
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