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https://github.com/xemu-project/xemu.git
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83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/*
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* xemu Data File and Path Helpers
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*
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* Copyright (C) 2020-2021 Matt Borgerson
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <SDL2/SDL.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "xemu-data.h"
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static int path_exists(const char *path)
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{
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FILE *fd = fopen(path, "rb");
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if (fd == NULL) return 0;
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fclose(fd);
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return 1;
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}
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const char *xemu_get_resource_path(const char *filename)
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{
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// Allocate an arbitrarily long buffer for resource path storage FIXME: This
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// could be done better with a growing printf. Keep it simple for now.
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const size_t resource_path_buffer_len = 1024;
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static char *sdl_base_path = NULL;
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static char *resource_path = NULL;
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if (!sdl_base_path) {
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sdl_base_path = SDL_GetBasePath();
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}
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if (!resource_path) {
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resource_path = malloc(resource_path_buffer_len);
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assert(resource_path != NULL);
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}
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// Try whichever location SDL deems appropriate
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snprintf(resource_path, resource_path_buffer_len, "%sdata/%s",
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sdl_base_path, filename);
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if (path_exists(resource_path)) {
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return resource_path;
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}
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// Try parent directory if launched from source root
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snprintf(resource_path, resource_path_buffer_len, "%s../data/%s",
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sdl_base_path, filename);
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if (path_exists(resource_path)) {
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return resource_path;
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}
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#if defined(__linux__)
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// /usr/share/xemu/data when installed
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snprintf(resource_path, resource_path_buffer_len, "/usr/share/xemu/data/%s",
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filename);
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if (path_exists(resource_path)) {
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return resource_path;
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}
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#endif
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// Path not found or file not readable
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assert(0);
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return NULL;
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}
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