mirror of
https://github.com/libretro/RetroArch.git
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636 lines
13 KiB
C
636 lines
13 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
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*
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* Some code herein may be based on code found in BSNES.
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*
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* SSNES is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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 along with SSNES.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config_file.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <errno.h>
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#include "strl.h"
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#ifndef _WIN32
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#include <sys/param.h> // MAXPATHLEN
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#endif
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#ifndef MAXPATHLEN
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#ifdef PATH_MAX
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#define MAXPATHLEN PATH_MAX
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#else
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#define MAXPATHLEN 512
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#endif
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#endif
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struct entry_list
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{
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bool readonly; // If we got this from an #include, do not allow write.
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char *key;
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char *value;
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struct entry_list *next;
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};
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struct include_list
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{
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char *path;
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struct include_list *next;
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};
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struct config_file
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{
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char *path;
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struct entry_list *entries;
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struct entry_list *tail;
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bool recursive;
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struct include_list *includes;
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};
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static config_file_t *config_file_new_internal(const char *path, bool recursive);
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static char *getaline(FILE *file)
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{
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char *newline = malloc(9);
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size_t cur_size = 8;
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size_t index = 0;
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int in = getc(file);
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while (in != EOF && in != '\n')
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{
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if (index == cur_size)
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{
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cur_size *= 2;
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newline = realloc(newline, cur_size + 1);
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}
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newline[index++] = in;
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in = getc(file);
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}
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newline[index] = '\0';
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return newline;
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}
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static char* extract_value(char *line, bool is_value)
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{
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if (is_value)
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{
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while (isspace(*line))
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line++;
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// If we don't have an equal sign here, we've got an invalid string...
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if (*line != '=')
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return false;
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line++;
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}
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while (isspace(*line))
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line++;
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// We have a full string. Read until next ".
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if (*line == '"')
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{
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line++;
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char *tok = strtok(line, "\"");
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if (!tok)
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return false;
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return strdup(tok);
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}
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else if (*line == '\0') // Nothing :(
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return NULL;
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else // We don't have that... Read till next space.
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{
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char *tok = strtok(line, " \n\t\f\r\v");
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if (tok)
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return strdup(tok);
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else
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return NULL;
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}
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}
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static void set_list_readonly(struct entry_list *list)
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{
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while (list)
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{
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list->readonly = true;
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list = list->next;
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}
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}
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// Move semantics? :)
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static void add_child_list(config_file_t *parent, config_file_t *child)
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{
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if (parent->entries)
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{
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struct entry_list *head = parent->entries;
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while (head->next)
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head = head->next;
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set_list_readonly(child->entries);
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head->next = child->entries;
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}
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else
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{
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set_list_readonly(child->entries);
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parent->entries = child->entries;
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}
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child->entries = NULL;
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// Rebase tail.
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if (parent->entries)
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{
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struct entry_list *head = parent->entries;
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while (head->next)
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head = head->next;
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parent->tail = head;
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}
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else
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parent->tail = NULL;
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}
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static void add_include_list(config_file_t *conf, const char *path)
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{
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struct include_list *head = conf->includes;
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struct include_list *node = calloc(1, sizeof(*node));
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node->path = strdup(path);
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if (head)
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{
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while (head->next)
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head = head->next;
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head->next = node;
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}
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else
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conf->includes = node;
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}
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static void add_sub_conf(config_file_t *conf, char *line)
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{
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char *path = extract_value(line, false);
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if (!path)
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return;
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add_include_list(conf, path);
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char real_path[MAXPATHLEN];
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#ifndef _WIN32
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if (*path == '/')
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{
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strlcpy(real_path, path, sizeof(real_path));
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}
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else if (*path == '~')
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{
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const char *home = getenv("HOME");
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strlcpy(real_path, home ? home : "/", sizeof(real_path));
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strlcat(real_path, path + 1, sizeof(real_path));
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}
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else
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{
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strlcpy(real_path, conf->path, sizeof(real_path));
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char *split = strrchr(real_path, '/');
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if (split)
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{
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split[1] = '\0';
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strlcat(real_path, path, sizeof(real_path));
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}
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else
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strlcpy(real_path, path, sizeof(real_path));
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}
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#else
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GetFullPathNameA(path, sizeof(real_path), real_path, NULL);
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#endif
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config_file_t *sub_conf = config_file_new_internal(real_path, true);
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if (!conf)
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{
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free(path);
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return;
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}
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// Pilfer internal list! :D
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add_child_list(conf, sub_conf);
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config_file_free(sub_conf);
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free(path);
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}
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static bool parse_line(config_file_t *conf, struct entry_list *list, char *line)
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{
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// Remove everything after comment.
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char *comment = strchr(line, '#');
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if (comment)
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*comment = '\0';
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// Starting line with # and include includes config files. :)
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if ((comment == line) && !conf->recursive)
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{
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comment++;
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if (strstr(comment, "include ") == comment)
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{
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add_sub_conf(conf, comment + strlen("include "));
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return false;
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}
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}
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// Skips to first character.
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while (isspace(*line))
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line++;
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char *key = malloc(9);
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size_t cur_size = 8;
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size_t index = 0;
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while (isgraph(*line))
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{
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if (index == cur_size)
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{
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cur_size *= 2;
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key = realloc(key, cur_size + 1);
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}
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key[index++] = *line++;
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}
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key[index] = '\0';
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list->key = key;
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list->value = extract_value(line, true);
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if (!list->value)
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{
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list->key = NULL;
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free(key);
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return false;
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}
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return true;
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}
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static config_file_t *config_file_new_internal(const char *path, bool recursive)
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{
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struct config_file *conf = calloc(1, sizeof(*conf));
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if (!conf)
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return NULL;
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if (!path)
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return conf;
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conf->path = strdup(path);
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if (!conf->path)
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{
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free(conf);
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return NULL;
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}
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conf->recursive = recursive;
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FILE *file = fopen(path, "r");
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if (!file)
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{
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free(conf->path);
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free(conf);
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return NULL;
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}
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while (!feof(file))
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{
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struct entry_list *list = calloc(1, sizeof(*list));
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char *line = getaline(file);
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if (line)
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{
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if (parse_line(conf, list, line))
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{
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if (conf->entries)
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{
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conf->tail->next = list;
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conf->tail = list;
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}
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else
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{
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conf->entries = list;
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conf->tail = list;
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}
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}
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free(line);
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}
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if (list != conf->tail)
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free(list);
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}
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fclose(file);
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return conf;
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}
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config_file_t *config_file_new(const char *path)
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{
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return config_file_new_internal(path, false);
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}
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void config_file_free(config_file_t *conf)
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{
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if (!conf)
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return;
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struct entry_list *tmp = conf->entries;
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while (tmp)
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{
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free(tmp->key);
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free(tmp->value);
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struct entry_list *hold = tmp;
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tmp = tmp->next;
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free(hold);
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}
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struct include_list *inc_tmp = conf->includes;
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while (inc_tmp)
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{
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free(inc_tmp->path);
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struct include_list *hold = inc_tmp;
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inc_tmp = inc_tmp->next;
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free(hold);
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}
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free(conf->path);
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free(conf);
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}
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bool config_get_double(config_file_t *conf, const char *key, double *in)
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{
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (strcmp(key, list->key) == 0)
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{
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*in = strtod(list->value, NULL);
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return true;
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}
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list = list->next;
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}
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return false;
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}
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bool config_get_int(config_file_t *conf, const char *key, int *in)
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{
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (strcmp(key, list->key) == 0)
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{
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errno = 0;
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int val = strtol(list->value, NULL, 0);
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if (errno == 0)
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{
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*in = val;
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return true;
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}
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return
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false;
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}
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list = list->next;
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}
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return false;
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}
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bool config_get_hex(config_file_t *conf, const char *key, unsigned *in)
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{
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (strcmp(key, list->key) == 0)
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{
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errno = 0;
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unsigned val = strtoul(list->value, NULL, 16);
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if (errno == 0)
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{
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*in = val;
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return true;
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}
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else
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return false;
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}
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list = list->next;
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}
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return false;
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}
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bool config_get_char(config_file_t *conf, const char *key, char *in)
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{
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (strcmp(key, list->key) == 0)
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{
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if (list->value[0] && list->value[1])
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return false;
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*in = *list->value;
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return true;
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}
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list = list->next;
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}
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return false;
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}
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bool config_get_string(config_file_t *conf, const char *key, char **str)
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{
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (strcmp(key, list->key) == 0)
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{
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*str = strdup(list->value);
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return true;
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}
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list = list->next;
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}
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return false;
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}
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bool config_get_array(config_file_t *conf, const char *key, char *buf, size_t size)
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{
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (strcmp(key, list->key) == 0)
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{
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strlcpy(buf, list->value, size);
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return true;
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}
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list = list->next;
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}
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return false;
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}
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bool config_get_bool(config_file_t *conf, const char *key, bool *in)
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{
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (strcmp(key, list->key) == 0)
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{
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if (strcasecmp(list->value, "true") == 0)
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*in = true;
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else if (strcasecmp(list->value, "1") == 0)
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*in = true;
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else if (strcasecmp(list->value, "false") == 0)
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*in = false;
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else if (strcasecmp(list->value, "0") == 0)
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*in = false;
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else
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return false;
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return true;
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}
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list = list->next;
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}
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return false;
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}
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void config_set_string(config_file_t *conf, const char *key, const char *val)
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{
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struct entry_list *list = conf->entries;
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struct entry_list *last = list;
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while (list)
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{
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if (!list->readonly && (strcmp(key, list->key) == 0))
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{
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free(list->value);
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list->value = strdup(val);
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return;
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}
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last = list;
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list = list->next;
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}
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struct entry_list *elem = calloc(1, sizeof(*elem));
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elem->key = strdup(key);
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elem->value = strdup(val);
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if (last)
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last->next = elem;
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else
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conf->entries = elem;
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}
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void config_set_double(config_file_t *conf, const char *key, double val)
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{
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char buf[128];
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snprintf(buf, sizeof(buf), "%lf", val);
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config_set_string(conf, key, buf);
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}
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void config_set_int(config_file_t *conf, const char *key, int val)
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{
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char buf[128];
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snprintf(buf, sizeof(buf), "%d", val);
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config_set_string(conf, key, buf);
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}
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void config_set_char(config_file_t *conf, const char *key, char val)
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{
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char buf[2];
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snprintf(buf, sizeof(buf), "%c", val);
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config_set_string(conf, key, buf);
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}
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void config_set_bool(config_file_t *conf, const char *key, bool val)
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{
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config_set_string(conf, key, val ? "true" : "false");
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}
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bool config_file_write(config_file_t *conf, const char *path)
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{
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FILE *file;
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if (path)
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{
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file = fopen(path, "w");
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if (!file)
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return false;
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}
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else
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file = stdout;
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config_file_dump(conf, file);
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if (path)
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fclose(file);
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return true;
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}
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void config_file_dump(config_file_t *conf, FILE *file)
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{
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struct include_list *includes = conf->includes;
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while (includes)
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{
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fprintf(file, "#include \"%s\"\n", includes->path);
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includes = includes->next;
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}
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struct entry_list *list = conf->entries;
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while (list)
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{
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if (!list->readonly)
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fprintf(file, "%s = \"%s\"\n", list->key, list->value);
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list = list->next;
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}
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}
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void config_file_dump_all(config_file_t *conf, FILE *file)
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{
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struct include_list *includes = conf->includes;
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while (includes)
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{
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fprintf(file, "#include \"%s\"\n", includes->path);
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includes = includes->next;
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}
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struct entry_list *list = conf->entries;
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while (list)
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{
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fprintf(file, "%s = \"%s\" %s\n", list->key, list->value, list->readonly ? "(included)" : "");
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list = list->next;
|
|
}
|
|
}
|
|
|
|
bool config_entry_exists(config_file_t *conf, const char *entry)
|
|
{
|
|
struct entry_list *list = conf->entries;
|
|
|
|
while (list)
|
|
{
|
|
if (strcmp(entry, list->key) == 0)
|
|
return true;
|
|
list = list->next;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|