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RetroArch/libretro-common/file/config_file.c
libretroadmin 7f87a46744 More downsizing of variables
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/* Copyright (C) 2010-2020 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (config_file.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <retro_miscellaneous.h>
#include <compat/strl.h>
#include <compat/posix_string.h>
#include <compat/fopen_utf8.h>
#include <compat/msvc.h>
#include <file/config_file.h>
#include <file/file_path.h>
#include <string/stdstring.h>
#include <streams/file_stream.h>
#include <array/rhmap.h>
#define MAX_INCLUDE_DEPTH 16
struct config_include_list
{
char *path;
struct config_include_list *next;
};
/* Forward declaration */
static bool config_file_parse_line(config_file_t *conf,
struct config_entry_list *list, char *line, config_file_cb_t *cb);
static int config_file_sort_compare_func(struct config_entry_list *a,
struct config_entry_list *b)
{
if (a && b)
{
if (a->key)
{
if (b->key)
return strcasecmp(a->key, b->key);
return 1;
}
else if (b->key)
return -1;
}
return 0;
}
/* https://stackoverflow.com/questions/7685/merge-sort-a-linked-list */
static struct config_entry_list* config_file_merge_sort_linked_list(
struct config_entry_list *list, int (*compare)(
struct config_entry_list *one,struct config_entry_list *two))
{
struct config_entry_list
*right = list,
*temp = list,
*last = list,
*result = 0,
*next = 0,
*tail = 0;
/* Trivial case. */
if (!list || !list->next)
return list;
/* Find halfway through the list (by running two pointers,
* one at twice the speed of the other). */
while (temp && temp->next)
{
last = right;
right = right->next;
temp = temp->next->next;
}
/* Break the list in two. (prev pointers are broken here,
* but we fix later) */
last->next = 0;
/* Recurse on the two smaller lists: */
list = config_file_merge_sort_linked_list(list, compare);
right = config_file_merge_sort_linked_list(right, compare);
/* Merge: */
while (list || right)
{
/* Take from empty lists, or compare: */
if (!right)
{
next = list;
list = list->next;
}
else if (!list)
{
next = right;
right = right->next;
}
else if (compare(list, right) < 0)
{
next = list;
list = list->next;
}
else
{
next = right;
right = right->next;
}
if (!result)
result = next;
else
tail->next = next;
tail = next;
}
return result;
}
/**
* config_file_strip_comment:
*
* Searches input string for a comment ('#') entry
* > If first character is '#', then entire line is
* a comment and may correspond to a directive
* (command action - e.g. include sub-config file).
* In this case, 'str' is set to NUL and the comment
* itself (everything after the '#' character) is
* returned
* > If a '#' character is found inside a string literal
* value, then it does not correspond to a comment and
* is ignored. In this case, 'str' is left untouched
* and NULL is returned
* > If a '#' character is found anywhere else, then the
* comment text is a suffix of the input string and
* has no programmatic value. In this case, the comment
* is removed from the end of 'str' and NULL is returned
**/
static char *config_file_strip_comment(char *str)
{
/* Search for a comment (#) character */
char *comment = strchr(str, '#');
if (comment)
{
char *literal_start = NULL;
/* Check whether entire line is a comment
* > First character == '#' */
if (str == comment)
{
/* Set 'str' to NUL and return comment
* for processing at a higher level */
*str = '\0';
return ++comment;
}
/* Comment character occurs at an offset:
* Search for the start of a string literal value */
literal_start = strchr(str, '\"');
/* Check whether string literal start occurs
* *before* the comment character */
if (literal_start && (literal_start < comment))
{
/* Search for the end of the string literal
* value */
char *literal_end = strchr(literal_start + 1, '\"');
/* Check whether string literal end occurs
* *after* the comment character
* > If this is the case, ignore the comment
* > Leave 'str' untouched and return NULL */
if (literal_end && (literal_end > comment))
return NULL;
}
/* If we reach this point, then a comment
* exists outside of a string literal
* > Trim the entire comment from the end
* of 'str' */
*comment = '\0';
}
return NULL;
}
static char *config_file_extract_value(char *line)
{
char *dst = NULL;
while (ISSPACE((int)*line))
line++;
/* Note: From this point on, an empty value
* string is valid - and in this case, strldup("", sizeof(""))
* will be returned (see Note 2)
* > If we instead return NULL, the the entry
* is ignored completely - which means we cannot
* track *changes* in entry value */
/* If first character is ("), we have a full string
* literal */
if (*line == '"')
{
size_t idx = 0;
char *value = NULL;
/* Skip to next character */
line++;
/* If this a ("), then value string is empty */
if (*line != '"')
{
/* Find the next (") character */
while (line[idx] && (line[idx] != '\"'))
idx++;
line[idx] = '\0';
if ((value = line) && *value)
return strdup(value);
}
}
/* This is not a string literal - just read
* until the next space is found
* > Note: Skip this if line is empty */
else if (*line != '\0')
{
size_t idx = 0;
char *value = NULL;
/* Find next space character */
while (line[idx] && isgraph((int)line[idx]))
idx++;
line[idx] = '\0';
if ((value = line) && *value)
return strdup(value);
}
/* Note 2: This is an unrolled strldup call
* to avoid an unnecessary dependency -
* call is strldup("", sizeof(""))
**/
dst = (char*)malloc(sizeof(char) * 2);
strlcpy(dst, "", 1);
return dst;
}
/* Move semantics? */
static void config_file_add_child_list(config_file_t *parent,
config_file_t *child)
{
struct config_entry_list *list = child->entries;
bool merge_hash_map = false;
if (parent->entries)
{
struct config_entry_list *head = parent->entries;
while (head->next)
head = head->next;
/* set list readonly */
while (list)
{
list->readonly = true;
list = list->next;
}
head->next = child->entries;
merge_hash_map = true;
}
else
{
/* set list readonly */
while (list)
{
list->readonly = true;
list = list->next;
}
parent->entries = child->entries;
}
/* Rebase tail. */
if (parent->entries)
{
struct config_entry_list *head =
(struct config_entry_list*)parent->entries;
while (head->next)
head = head->next;
parent->tail = head;
}
else
parent->tail = NULL;
/* Update hash map */
if (merge_hash_map)
{
size_t i;
size_t cap;
/* We are merging two lists - if any child entry
* (key) is not present in the parent list, add it
* to the parent hash map */
for (i = 0, cap = RHMAP_CAP(child->entries_map); i != cap; i++)
{
uint32_t child_hash = RHMAP_KEY(child->entries_map, i);
const char *child_key = RHMAP_KEY_STR(child->entries_map, i);
if (child_hash &&
child_key &&
!RHMAP_HAS_FULL(parent->entries_map, child_hash, child_key))
{
struct config_entry_list *entry = child->entries_map[i];
if (entry)
RHMAP_SET_FULL(parent->entries_map, child_hash, child_key, entry);
}
}
/* Child entries map is no longer required,
* so free it now */
RHMAP_FREE(child->entries_map);
}
else
{
/* If parent list was originally empty,
* take map from child list */
RHMAP_FREE(parent->entries_map);
parent->entries_map = child->entries_map;
child->entries_map = NULL;
}
child->entries = NULL;
}
static void config_file_get_realpath(char *s, size_t len,
char *path, const char *config_path)
{
#ifdef _WIN32
if (!string_is_empty(config_path))
fill_pathname_resolve_relative(s, config_path,
path, len);
#else
#if !defined(__PSL1GHT__) && !defined(__PS3__)
if (*path == '~')
{
const char *home = getenv("HOME");
if (home)
{
size_t _len = strlcpy(s, home, len);
strlcpy(s + _len, path + 1, len - _len);
}
else
strlcpy(s, path + 1, len);
}
else
#endif
if (!string_is_empty(config_path))
fill_pathname_resolve_relative(s, config_path, path, len);
#endif
}
static void config_file_add_sub_conf(config_file_t *conf, char *path,
char *real_path, size_t len, config_file_cb_t *cb)
{
struct config_include_list *head = conf->includes;
struct config_include_list *node = (struct config_include_list*)
malloc(sizeof(*node));
if (node)
{
node->next = NULL;
/* Add include list */
node->path = strdup(path);
if (head)
{
while (head->next)
head = head->next;
head->next = node;
}
else
conf->includes = node;
}
config_file_get_realpath(real_path, len, path,
conf->path);
}
size_t config_file_add_reference(config_file_t *conf, char *path)
{
size_t len;
/* It is expected that the conf has it's path already set */
char short_path[NAME_MAX_LENGTH];
if (!conf->references)
conf->references = path_linked_list_new();
len = fill_pathname_abbreviated_or_relative(short_path, conf->path, path, sizeof(short_path));
path_linked_list_add_path(conf->references, short_path);
return len;
}
static int config_file_load_internal(
struct config_file *conf,
const char *path, unsigned depth, config_file_cb_t *cb)
{
RFILE *file = NULL;
char *new_path = strdup(path);
if (!new_path)
return 1;
conf->path = new_path;
conf->include_depth = depth;
if (!(file = filestream_open(path,
RETRO_VFS_FILE_ACCESS_READ,
RETRO_VFS_FILE_ACCESS_HINT_NONE)))
{
free(conf->path);
return 1;
}
while (!filestream_eof(file))
{
char *line = NULL;
struct config_entry_list *list = (struct config_entry_list*)
malloc(sizeof(*list));
if (!list)
{
filestream_close(file);
return -1;
}
list->readonly = false;
list->key = NULL;
list->value = NULL;
list->next = NULL;
line = filestream_getline(file);
if (!line)
{
free(list);
continue;
}
if (
!string_is_empty(line)
&& config_file_parse_line(conf, list, line, cb))
{
if (conf->entries)
conf->tail->next = list;
else
conf->entries = list;
conf->tail = list;
if (list->key)
{
/* Only add entry to the map if an entry
* with the specified value does not
* already exist */
uint32_t hash = rhmap_hash_string(list->key);
if (!RHMAP_HAS_FULL(conf->entries_map, hash, list->key))
{
RHMAP_SET_FULL(conf->entries_map, hash, list->key, list);
if (cb && list->value)
cb->config_file_new_entry_cb(list->key, list->value);
}
}
}
free(line);
if (list != conf->tail)
free(list);
}
filestream_close(file);
return 0;
}
static bool config_file_parse_line(config_file_t *conf,
struct config_entry_list *list, char *line, config_file_cb_t *cb)
{
size_t cur_size = 32;
size_t idx = 0;
char *key = NULL;
char *key_tmp = NULL;
/* Remove any comment text */
char *comment = config_file_strip_comment(line);
/* Check whether entire line is a comment */
if (comment)
{
char *path = NULL;
bool include_found = string_starts_with_size(comment,
"include ", STRLEN_CONST("include "));
bool reference_found = string_starts_with_size(comment,
"reference ", STRLEN_CONST("reference "));
/* All comments except those starting with the include or
* reference directive are ignored */
if (!include_found && !reference_found)
return false;
/* Starting a line with an 'include' directive
* appends a sub-config file */
if (include_found)
{
config_file_t sub_conf;
char real_path[PATH_MAX_LENGTH];
char *include_line = comment + STRLEN_CONST("include ");
if (string_is_empty(include_line))
return false;
if (!(path = config_file_extract_value(include_line)))
return false;
if ( string_is_empty(path)
|| conf->include_depth >= MAX_INCLUDE_DEPTH)
{
free(path);
return false;
}
config_file_add_sub_conf(conf, path,
real_path, sizeof(real_path), cb);
config_file_initialize(&sub_conf);
switch (config_file_load_internal(&sub_conf, real_path,
conf->include_depth + 1, cb))
{
case 0:
/* Pilfer internal list. */
config_file_add_child_list(conf, &sub_conf);
/* fall-through to deinitialize */
case -1:
config_file_deinitialize(&sub_conf);
break;
case 1:
default:
break;
}
}
/* Starting a line with an 'reference' directive
* sets the reference path */
if (reference_found)
{
char *reference_line = comment + STRLEN_CONST("reference ");
if (string_is_empty(reference_line))
return false;
if (!(path = config_file_extract_value(reference_line)))
return false;
config_file_add_reference(conf, path);
if (!path)
return false;
}
free(path);
return true;
}
/* Skip to first non-space character */
while (ISSPACE((int)*line))
line++;
/* Allocate storage for key */
if (!(key = (char*)malloc(cur_size + 1)))
return false;
/* Copy line contents into key until we
* reach the next space character */
while (isgraph((int)*line))
{
/* If current key storage is too small,
* double its size */
if (idx == cur_size)
{
cur_size *= 2;
if (!(key_tmp = (char*)realloc(key, cur_size + 1)))
{
free(key);
return false;
}
key = key_tmp;
}
key[idx++] = *line++;
}
key[idx] = '\0';
/* Add key and value entries to list */
list->key = key;
/* An entry without a value is invalid */
while (ISSPACE((int)*line))
line++;
/* If we don't have an equal sign here,
* we've got an invalid string. */
if (*line != '=')
{
list->value = NULL;
goto error;
}
line++;
if (!(list->value = config_file_extract_value(line)))
goto error;
return true;
error:
list->key = NULL;
free(key);
return false;
}
static int config_file_from_string_internal(
struct config_file *conf,
char *from_string,
const char *path)
{
char *lines = from_string;
char *save_ptr = NULL;
char *line = NULL;
if (!string_is_empty(path))
conf->path = strdup(path);
if (string_is_empty(lines))
return 0;
/* Get first line of config file */
line = strtok_r(lines, "\n", &save_ptr);
while (line)
{
struct config_entry_list *list = (struct config_entry_list*)
malloc(sizeof(*list));
if (!list)
return -1;
list->readonly = false;
list->key = NULL;
list->value = NULL;
list->next = NULL;
/* Parse current line */
if (
!string_is_empty(line)
&& config_file_parse_line(conf, list, line, NULL))
{
if (conf->entries)
conf->tail->next = list;
else
conf->entries = list;
conf->tail = list;
if (list->key)
{
/* Only add entry to the map if an entry
* with the specified value does not
* already exist */
uint32_t hash = rhmap_hash_string(list->key);
if (!RHMAP_HAS_FULL(conf->entries_map, hash, list->key))
RHMAP_SET_FULL(conf->entries_map, hash, list->key, list);
}
}
if (list != conf->tail)
free(list);
/* Get next line of config file */
line = strtok_r(NULL, "\n", &save_ptr);
}
return 0;
}
bool config_file_deinitialize(config_file_t *conf)
{
struct config_include_list *inc_tmp = NULL;
struct config_entry_list *tmp = NULL;
if (!conf)
return false;
tmp = conf->entries;
while (tmp)
{
struct config_entry_list *hold = NULL;
if (tmp->key)
free(tmp->key);
if (tmp->value)
free(tmp->value);
tmp->value = NULL;
tmp->key = NULL;
hold = tmp;
tmp = tmp->next;
if (hold)
free(hold);
}
inc_tmp = (struct config_include_list*)conf->includes;
while (inc_tmp)
{
struct config_include_list *hold = NULL;
if (inc_tmp->path)
free(inc_tmp->path);
hold = (struct config_include_list*)inc_tmp;
inc_tmp = inc_tmp->next;
if (hold)
free(hold);
}
path_linked_list_free(conf->references);
if (conf->path)
free(conf->path);
RHMAP_FREE(conf->entries_map);
return true;
}
/**
* config_file_free:
*
* Frees config file.
**/
void config_file_free(config_file_t *conf)
{
if (config_file_deinitialize(conf))
free(conf);
}
/**
* config_append_file:
*
* Loads a new config, and appends its data to @conf.
* The key-value pairs of the new config file takes priority over the old.
**/
bool config_append_file(config_file_t *conf, const char *path)
{
size_t i, cap;
config_file_t *new_conf = config_file_new_from_path_to_string(path);
if (!new_conf)
return false;
/* Update hash map */
for (i = 0, cap = RHMAP_CAP(new_conf->entries_map); i != cap; i++)
{
uint32_t new_hash = RHMAP_KEY(new_conf->entries_map, i);
const char *new_key = RHMAP_KEY_STR(new_conf->entries_map, i);
if (new_hash && new_key)
{
struct config_entry_list *entry = new_conf->entries_map[i];
if (entry)
RHMAP_SET_FULL(conf->entries_map, new_hash, new_key, entry);
}
}
if (new_conf->tail)
{
new_conf->tail->next = conf->entries;
conf->entries = new_conf->entries; /* Pilfer. */
new_conf->entries = NULL;
}
config_file_free(new_conf);
return true;
}
/**
* config_file_new_from_string:
*
* Load a config file from a string.
*
* NOTE: This will modify @from_string.
* Pass a copy of source string if original
* contents must be preserved
**/
config_file_t *config_file_new_from_string(char *from_string,
const char *path)
{
struct config_file *conf = config_file_new_alloc();
if ( conf
&& config_file_from_string_internal(
conf, from_string, path) != -1)
return conf;
if (conf)
config_file_free(conf);
return NULL;
}
config_file_t *config_file_new_from_path_to_string(const char *path)
{
if (path_is_valid(path))
{
uint8_t *ret_buf = NULL;
int64_t length = 0;
if (filestream_read_file(path, (void**)&ret_buf, &length))
{
config_file_t *conf = NULL;
/* Note: 'ret_buf' is not used outside this
* function - we do not care that it will be
* modified by config_file_new_from_string() */
if (length >= 0)
conf = config_file_new_from_string((char*)ret_buf, path);
if ((void*)ret_buf)
free((void*)ret_buf);
return conf;
}
}
return NULL;
}
/**
* config_file_new_with_callback:
*
* Loads a config file.
* If @path is NULL, will create an empty config file.
* Includes cb callbacks to run custom code during config file processing.
*
* @return Returns NULL if file doesn't exist.
**/
config_file_t *config_file_new_with_callback(
const char *path, config_file_cb_t *cb)
{
int ret = 0;
struct config_file *conf = config_file_new_alloc();
if (!path || !*path)
return conf;
if ((ret = config_file_load_internal(conf, path, 0, cb)) == -1)
{
config_file_free(conf);
return NULL;
}
else if (ret == 1)
{
free(conf);
return NULL;
}
return conf;
}
/**
* config_file_new:
*
* Loads a config file.
* If @path is NULL, will create an empty config file.
*
* @return Returns NULL if file doesn't exist.
**/
config_file_t *config_file_new(const char *path)
{
int ret = 0;
struct config_file *conf = config_file_new_alloc();
if (!path || !*path)
return conf;
if ((ret = config_file_load_internal(conf, path, 0, NULL)) == -1)
{
config_file_free(conf);
return NULL;
}
else if (ret == 1)
{
free(conf);
return NULL;
}
return conf;
}
/**
* config_file_initialize:
*
* Leaf function.
**/
void config_file_initialize(struct config_file *conf)
{
if (!conf)
return;
conf->path = NULL;
conf->entries_map = NULL;
conf->entries = NULL;
conf->tail = NULL;
conf->last = NULL;
conf->references = NULL;
conf->includes = NULL;
conf->include_depth = 0;
conf->flags = 0;
}
config_file_t *config_file_new_alloc(void)
{
struct config_file *conf = (struct config_file*)malloc(sizeof(*conf));
if (!conf)
return NULL;
config_file_initialize(conf);
return conf;
}
/**
* config_get_entry_internal:
*
* Leaf function.
**/
static struct config_entry_list *config_get_entry_internal(
const config_file_t *conf,
const char *key, struct config_entry_list **prev)
{
struct config_entry_list *entry = RHMAP_GET_STR(conf->entries_map, key);
if (entry)
return entry;
if (prev)
{
struct config_entry_list *previous = *prev;
for (entry = conf->entries; entry; entry = entry->next)
previous = entry;
*prev = previous;
}
return NULL;
}
struct config_entry_list *config_get_entry(
const config_file_t *conf, const char *key)
{
return RHMAP_GET_STR(conf->entries_map, key);
}
/**
* config_get_double:
*
* Extracts a double from config file.
*
* @return true if found, otherwise false.
**/
bool config_get_double(config_file_t *conf, const char *key, double *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
if (!entry)
return false;
*in = strtod(entry->value, NULL);
return true;
}
/**
* config_get_float:
*
* Extracts a float from config file.
*
* @return true if found, otherwise false.
**/
bool config_get_float(config_file_t *conf, const char *key, float *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
if (!entry)
return false;
/* strtof() is C99/POSIX. Just use the more portable kind. */
*in = (float)strtod(entry->value, NULL);
return true;
}
bool config_get_int(config_file_t *conf, const char *key, int *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
errno = 0;
if (entry)
{
int val = (int)strtol(entry->value, NULL, 0);
if (errno == 0)
{
*in = val;
return true;
}
}
return false;
}
bool config_get_size_t(config_file_t *conf, const char *key, size_t *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
errno = 0;
if (entry)
{
size_t val = 0;
if (sscanf(entry->value, "%" PRI_SIZET, &val) == 1)
{
*in = val;
return true;
}
}
return false;
}
#if defined(__STDC_VERSION__) && __STDC_VERSION__>=199901L
bool config_get_uint64(config_file_t *conf, const char *key, uint64_t *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
errno = 0;
if (entry)
{
uint64_t val = strtoull(entry->value, NULL, 0);
if (errno == 0)
{
*in = val;
return true;
}
}
return false;
}
#endif
bool config_get_uint(config_file_t *conf, const char *key, unsigned *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
errno = 0;
if (entry)
{
unsigned val = (unsigned)strtoul(entry->value, NULL, 0);
if (errno == 0)
{
*in = val;
return true;
}
}
return false;
}
bool config_get_hex(config_file_t *conf, const char *key, unsigned *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
errno = 0;
if (entry)
{
unsigned val = (unsigned)strtoul(entry->value, NULL, 16);
if (errno == 0)
{
*in = val;
return true;
}
}
return false;
}
/**
* config_get_char:
*
* Extracts a single char from config file.
* If value consists of several chars, this is an error.
*
* @return true if found, otherwise false.
**/
bool config_get_char(config_file_t *conf, const char *key, char *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
if (entry)
{
if (entry->value[0] && entry->value[1])
return false;
*in = *entry->value;
return true;
}
return false;
}
/**
* config_get_string:
*
* Extracts an allocated string in *in. This must be free()-d if
* this function succeeds.
*
* @return true if found, otherwise false.
**/
bool config_get_string(config_file_t *conf, const char *key, char **str)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
if (!entry || !entry->value)
return false;
*str = strdup(entry->value);
return true;
}
/**
* config_get_config_path:
*
* Extracts a string to a preallocated buffer.
* Avoid memory allocation.
**/
bool config_get_config_path(config_file_t *conf, char *s, size_t len)
{
if (conf)
return strlcpy(s, conf->path, len);
return false;
}
bool config_get_array(config_file_t *conf, const char *key,
char *buf, size_t size)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
if (entry)
return strlcpy(buf, entry->value, size) < size;
return false;
}
bool config_get_path(config_file_t *conf, const char *key,
char *buf, size_t size)
{
#if defined(RARCH_CONSOLE) || !defined(RARCH_INTERNAL)
if (config_get_array(conf, key, buf, size))
return true;
#else
const struct config_entry_list *entry = config_get_entry(conf, key);
if (entry)
{
fill_pathname_expand_special(buf, entry->value, size);
return true;
}
#endif
return false;
}
/**
* config_get_bool:
*
* Extracts a boolean from config.
* Valid boolean true are "true" and "1". Valid false are "false" and "0".
* Other values will be treated as an error.
*
* @return true if preconditions are true, otherwise false.
**/
bool config_get_bool(config_file_t *conf, const char *key, bool *in)
{
const struct config_entry_list *entry = config_get_entry(conf, key);
if (!entry)
return false;
if (
(
entry->value[0] == '1'
&& entry->value[1] == '\0'
)
|| string_is_equal(entry->value, "true")
)
*in = true;
else if (
(
entry->value[0] == '0'
&& entry->value[1] == '\0'
)
|| string_is_equal(entry->value, "false")
)
*in = false;
else
return false;
return true;
}
void config_set_string(config_file_t *conf, const char *key, const char *val)
{
struct config_entry_list *last = NULL;
struct config_entry_list *entry = NULL;
if (!conf || !key || !val)
return;
last = conf->entries;
if (conf->flags & CONF_FILE_FLG_GUARANTEED_NO_DUPLICATES)
{
if (conf->last)
last = conf->last;
}
else
{
if ((entry = config_get_entry_internal(conf, key, &last)))
{
/* An entry corresponding to 'key' already exists
* > Check whether value is currently set */
if (entry->value)
{
/* Do nothing if value is unchanged */
if (string_is_equal(entry->value, val))
return;
/* Value is to be updated
* > Free existing */
free(entry->value);
}
/* Update value
* > Note that once a value is set, it
* is no longer considered 'read only' */
entry->value = strdup(val);
entry->readonly = false;
conf->flags |= CONF_FILE_FLG_MODIFIED;
return;
}
}
/* Entry corresponding to 'key' does not exist
* > Create new entry */
if (!(entry = (struct config_entry_list*)malloc(sizeof(*entry))))
return;
entry->readonly = false;
entry->key = strdup(key);
entry->value = strdup(val);
entry->next = NULL;
conf->flags |= CONF_FILE_FLG_MODIFIED;
if (last)
last->next = entry;
else
conf->entries = entry;
conf->last = entry;
RHMAP_SET_STR(conf->entries_map, entry->key, entry);
}
void config_unset(config_file_t *conf, const char *key)
{
struct config_entry_list *last = NULL;
struct config_entry_list *entry = NULL;
if (!conf || !key)
return;
last = conf->entries;
if (!(entry = config_get_entry_internal(conf, key, &last)))
return;
(void)RHMAP_DEL_STR(conf->entries_map, entry->key);
if (entry->key)
free(entry->key);
if (entry->value)
free(entry->value);
entry->key = NULL;
entry->value = NULL;
conf->flags |= CONF_FILE_FLG_MODIFIED;
}
void config_set_path(config_file_t *conf, const char *entry, const char *val)
{
#if defined(RARCH_CONSOLE) || !defined(RARCH_INTERNAL)
config_set_string(conf, entry, val);
#else
char buf[PATH_MAX_LENGTH];
fill_pathname_abbreviate_special(buf, val, sizeof(buf));
config_set_string(conf, entry, buf);
#endif
}
size_t config_set_double(config_file_t *conf, const char *key, double val)
{
char buf[320];
#ifdef __cplusplus
size_t len = snprintf(buf, sizeof(buf), "%f", (float)val);
#elif defined(__STDC_VERSION__) && __STDC_VERSION__>=199901L
size_t len = snprintf(buf, sizeof(buf), "%lf", val);
#else
size_t len = snprintf(buf, sizeof(buf), "%f", (float)val);
#endif
config_set_string(conf, key, buf);
return len;
}
size_t config_set_float(config_file_t *conf, const char *key, float val)
{
char buf[64];
size_t len = snprintf(buf, sizeof(buf), "%f", val);
config_set_string(conf, key, buf);
return len;
}
size_t config_set_int(config_file_t *conf, const char *key, int val)
{
char buf[16];
size_t len = snprintf(buf, sizeof(buf), "%d", val);
config_set_string(conf, key, buf);
return len;
}
size_t config_set_uint(config_file_t *conf, const char *key, unsigned int val)
{
char buf[16];
size_t len = snprintf(buf, sizeof(buf), "%u", val);
config_set_string(conf, key, buf);
return len;
}
size_t config_set_hex(config_file_t *conf, const char *key, unsigned val)
{
char buf[16];
size_t len = snprintf(buf, sizeof(buf), "%x", val);
config_set_string(conf, key, buf);
return len;
}
size_t config_set_uint64(config_file_t *conf, const char *key, uint64_t val)
{
char buf[32];
size_t len = snprintf(buf, sizeof(buf), "%" PRIu64, val);
config_set_string(conf, key, buf);
return len;
}
size_t config_set_char(config_file_t *conf, const char *key, char val)
{
char buf[2];
size_t len = snprintf(buf, sizeof(buf), "%c", val);
config_set_string(conf, key, buf);
return len;
}
/**
* config_file_write:
*
* Write the current config to a file.
**/
bool config_file_write(config_file_t *conf, const char *path, bool sort)
{
if (!conf)
return false;
if (conf->flags & CONF_FILE_FLG_MODIFIED)
{
if (string_is_empty(path))
config_file_dump(conf, stdout, sort);
else
{
void* buf = NULL;
FILE *file = (FILE*)fopen_utf8(path, "wb");
if (!file)
return false;
buf = calloc(1, 0x4000);
setvbuf(file, (char*)buf, _IOFBF, 0x4000);
config_file_dump(conf, file, sort);
if (file != stdout)
fclose(file);
if (buf)
free(buf);
/* Only update modified flag if config file
* is actually written to disk */
conf->flags &= ~CONF_FILE_FLG_MODIFIED;
}
}
return true;
}
/**
* config_file_dump:
*
* Dump the current config to an already opened file.
* Does not close the file.
**/
void config_file_dump(config_file_t *conf, FILE *file, bool sort)
{
struct config_entry_list *list = NULL;
struct config_include_list *includes = conf->includes;
struct path_linked_list *ref_tmp = conf->references;
while (ref_tmp)
{
pathname_make_slashes_portable(ref_tmp->path);
fprintf(file, "#reference \"%s\"\n", ref_tmp->path);
ref_tmp = ref_tmp->next;
}
if (sort)
list = config_file_merge_sort_linked_list(
(struct config_entry_list*)conf->entries,
config_file_sort_compare_func);
else
list = (struct config_entry_list*)conf->entries;
conf->entries = list;
while (list)
{
if (!list->readonly && list->key)
fprintf(file, "%s = \"%s\"\n", list->key, list->value);
list = list->next;
}
/* Config files are read from the top down - if
* duplicate entries are found then the topmost
* one in the list takes precedence. This means
* '#include' directives must go *after* individual
* config entries, otherwise they will override
* any custom-set values */
while (includes)
{
fprintf(file, "#include \"%s\"\n", includes->path);
includes = includes->next;
}
}
/**
* config_get_entry_list_head:
*
* Leaf function.
**/
bool config_get_entry_list_head(config_file_t *conf,
struct config_file_entry *entry)
{
const struct config_entry_list *head = conf->entries;
if (!head)
return false;
entry->key = head->key;
entry->value = head->value;
entry->next = head->next;
return true;
}
/**
* config_get_entry_list_next:
*
* Leaf function.
**/
bool config_get_entry_list_next(struct config_file_entry *entry)
{
const struct config_entry_list *next = entry->next;
if (!next)
return false;
entry->key = next->key;
entry->value = next->value;
entry->next = next->next;
return true;
}
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