/*
* Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
*
* 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 of the
* License, 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
*/
#include "dtc.h"
#include "srcpos.h"
/*
* Like yylineno, this is the current open file pos.
*/
struct dtc_file *srcpos_file;
static int dtc_open_one(struct dtc_file *file,
const char *search,
const char *fname)
{
char *fullname;
if (search) {
fullname = xmalloc(strlen(search) + strlen(fname) + 2);
strcpy(fullname, search);
strcat(fullname, "/");
strcat(fullname, fname);
} else {
fullname = strdup(fname);
}
file->file = fopen(fullname, "r");
if (!file->file) {
free(fullname);
return 0;
}
file->name = fullname;
return 1;
}
struct dtc_file *dtc_open_file(const char *fname,
const struct search_path *search)
{
static const struct search_path default_search = { NULL, NULL, NULL };
struct dtc_file *file;
const char *slash;
file = xmalloc(sizeof(struct dtc_file));
slash = strrchr(fname, '/');
if (slash) {
char *dir = xmalloc(slash - fname + 1);
memcpy(dir, fname, slash - fname);
dir[slash - fname] = 0;
file->dir = dir;
} else {
file->dir = NULL;
}
if (streq(fname, "-")) {
file->name = "stdin";
file->file = stdin;
return file;
}
if (fname[0] == '/') {
file->file = fopen(fname, "r");
if (!file->file)
goto fail;
file->name = strdup(fname);
return file;
}
if (!search)
search = &default_search;
while (search) {
if (dtc_open_one(file, search->dir, fname))
return file;
if (errno != ENOENT)
goto fail;
search = search->next;
}
fail:
die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
}
void dtc_close_file(struct dtc_file *file)
{
if (fclose(file->file))
die("Error closing \"%s\": %s\n", file->name, strerror(errno));
free(file->dir);
free(file);
}