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https://github.com/libretro/RetroArch.git
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(config_file) Cleanups
This commit is contained in:
twinaphex
parent
f18af41876
commit
b7b96fb142
@ -56,10 +56,11 @@ struct config_include_list
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struct config_include_list *next;
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};
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static config_file_t *config_file_new_internal(
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const char *path, unsigned depth, config_file_cb_t *cb);
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/* Forward declaration */
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static bool config_file_parse_line(config_file_t *conf,
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struct config_entry_list *list, char *line, config_file_cb_t *cb);
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static int config_sort_compare_func(struct config_entry_list *a,
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static int config_file_sort_compare_func(struct config_entry_list *a,
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struct config_entry_list *b)
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{
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if (a && b)
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@ -78,7 +79,7 @@ static int config_sort_compare_func(struct config_entry_list *a,
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}
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/* https://stackoverflow.com/questions/7685/merge-sort-a-linked-list */
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static struct config_entry_list* merge_sort_linked_list(
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static struct config_entry_list* config_file_merge_sort_linked_list(
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struct config_entry_list *list, int (*compare)(
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struct config_entry_list *one,struct config_entry_list *two))
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{
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@ -108,8 +109,8 @@ static struct config_entry_list* merge_sort_linked_list(
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last->next = 0;
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/* Recurse on the two smaller lists: */
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list = merge_sort_linked_list(list, compare);
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right = merge_sort_linked_list(right, compare);
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list = config_file_merge_sort_linked_list(list, compare);
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right = config_file_merge_sort_linked_list(right, compare);
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/* Merge: */
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while (list || right)
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@ -162,7 +163,7 @@ static struct config_entry_list* merge_sort_linked_list(
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* comment text is a suffix of the input string and
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* has no programmatic value. In this case, the comment
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* is removed from the end of 'str' and NULL is returned */
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static char *strip_comment(char *str)
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static char *config_file_strip_comment(char *str)
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{
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/* Search for a comment (#) character */
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char *comment = strchr(str, '#');
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@ -211,7 +212,7 @@ static char *strip_comment(char *str)
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return NULL;
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}
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static char *extract_value(char *line, bool is_value)
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static char *config_file_extract_value(char *line, bool is_value)
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{
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size_t idx = 0;
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char *value = NULL;
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@ -277,7 +278,7 @@ static char *extract_value(char *line, bool is_value)
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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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static void config_file_add_child_list(config_file_t *parent, config_file_t *child)
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{
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struct config_entry_list *list = child->entries;
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if (parent->entries)
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@ -348,7 +349,7 @@ static void config_file_get_realpath(char *s, size_t len,
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#endif
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}
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static void add_sub_conf(config_file_t *conf, char *path,
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static void config_file_add_sub_conf(config_file_t *conf, char *path,
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char *real_path, size_t len, config_file_cb_t *cb)
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{
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struct config_include_list *head = conf->includes;
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@ -376,117 +377,6 @@ static void add_sub_conf(config_file_t *conf, char *path,
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conf->path);
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}
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static bool parse_line(config_file_t *conf,
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struct config_entry_list *list, char *line, config_file_cb_t *cb)
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{
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size_t cur_size = 32;
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size_t idx = 0;
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char *key = NULL;
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char *key_tmp = NULL;
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/* Remove any comment text */
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char *comment = strip_comment(line);
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/* Check whether entire line is a comment */
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if (comment)
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{
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char real_path[PATH_MAX_LENGTH];
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char *path = NULL;
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char *include_line = NULL;
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config_file_t *sub_conf = NULL;
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/* Starting a line with an 'include' directive
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* appends a sub-config file
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* > All other comments are ignored */
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if (!string_starts_with_size(comment, "include ",
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STRLEN_CONST("include ")))
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return false;
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include_line = comment + STRLEN_CONST("include ");
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if (string_is_empty(include_line))
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return false;
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path = extract_value(include_line, false);
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if (!path)
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return false;
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if (string_is_empty(path))
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{
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free(path);
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return false;
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}
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if (conf->include_depth >= MAX_INCLUDE_DEPTH)
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{
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fprintf(stderr, "!!! #include depth exceeded for config. Might be a cycle.\n");
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free(path);
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return false;
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}
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real_path[0] = '\0';
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add_sub_conf(conf, path, real_path, sizeof(real_path), cb);
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if ((sub_conf = (config_file_t*)
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config_file_new_internal(real_path, conf->include_depth + 1, cb)))
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{
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/* Pilfer internal list. */
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add_child_list(conf, sub_conf);
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config_file_free(sub_conf);
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}
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free(path);
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return true;
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}
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/* Skip to first non-space character */
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while (isspace((int)*line))
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line++;
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/* Allocate storage for key */
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key = (char*)malloc(cur_size + 1);
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if (!key)
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return false;
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/* Copy line contents into key until we
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* reach the next space character */
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while (isgraph((int)*line))
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{
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/* If current key storage is too small,
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* double its size */
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if (idx == cur_size)
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{
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cur_size *= 2;
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key_tmp = (char*)realloc(key, cur_size + 1);
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if (!key_tmp)
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{
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free(key);
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return false;
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}
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key = key_tmp;
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}
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key[idx++] = *line++;
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}
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key[idx] = '\0';
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/* Add key and value entries to list */
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list->key = key;
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list->value = extract_value(line, true);
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/* An entry without a value is invalid */
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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(
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const char *path, unsigned depth, config_file_cb_t *cb)
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{
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@ -538,7 +428,7 @@ static config_file_t *config_file_new_internal(
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if (
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!string_is_empty(line)
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&& parse_line(conf, list, line, cb))
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&& config_file_parse_line(conf, list, line, cb))
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{
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if (conf->entries)
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conf->tail->next = list;
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@ -567,6 +457,117 @@ error:
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return NULL;
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}
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static bool config_file_parse_line(config_file_t *conf,
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struct config_entry_list *list, char *line, config_file_cb_t *cb)
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{
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size_t cur_size = 32;
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size_t idx = 0;
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char *key = NULL;
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char *key_tmp = NULL;
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/* Remove any comment text */
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char *comment = config_file_strip_comment(line);
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/* Check whether entire line is a comment */
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if (comment)
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{
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char real_path[PATH_MAX_LENGTH];
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char *path = NULL;
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char *include_line = NULL;
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config_file_t *sub_conf = NULL;
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/* Starting a line with an 'include' directive
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* appends a sub-config file
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* > All other comments are ignored */
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if (!string_starts_with_size(comment, "include ",
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STRLEN_CONST("include ")))
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return false;
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include_line = comment + STRLEN_CONST("include ");
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if (string_is_empty(include_line))
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return false;
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path = config_file_extract_value(include_line, false);
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if (!path)
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return false;
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if (string_is_empty(path))
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{
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free(path);
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return false;
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}
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if (conf->include_depth >= MAX_INCLUDE_DEPTH)
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{
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fprintf(stderr, "!!! #include depth exceeded for config. Might be a cycle.\n");
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free(path);
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return false;
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}
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real_path[0] = '\0';
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config_file_add_sub_conf(conf, path, real_path, sizeof(real_path), cb);
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if ((sub_conf = (config_file_t*)
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config_file_new_internal(real_path, conf->include_depth + 1, cb)))
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{
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/* Pilfer internal list. */
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config_file_add_child_list(conf, sub_conf);
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config_file_free(sub_conf);
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}
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free(path);
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return true;
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}
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/* Skip to first non-space character */
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while (isspace((int)*line))
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line++;
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/* Allocate storage for key */
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key = (char*)malloc(cur_size + 1);
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if (!key)
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return false;
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/* Copy line contents into key until we
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* reach the next space character */
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while (isgraph((int)*line))
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{
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/* If current key storage is too small,
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* double its size */
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if (idx == cur_size)
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{
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cur_size *= 2;
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key_tmp = (char*)realloc(key, cur_size + 1);
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if (!key_tmp)
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{
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free(key);
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return false;
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}
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key = key_tmp;
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}
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key[idx++] = *line++;
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}
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key[idx] = '\0';
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/* Add key and value entries to list */
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list->key = key;
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list->value = config_file_extract_value(line, true);
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/* An entry without a value is invalid */
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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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void config_file_free(config_file_t *conf)
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{
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struct config_include_list *inc_tmp = NULL;
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@ -630,26 +631,16 @@ bool config_append_file(config_file_t *conf, const char *path)
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config_file_t *config_file_new_from_string(char *from_string,
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const char *path)
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{
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char *lines = from_string;
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char *save_ptr = NULL;
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char *line = NULL;
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struct config_file *conf = (struct config_file*)malloc(sizeof(*conf));
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char *lines = from_string;
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char *save_ptr = NULL;
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char *line = NULL;
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struct config_file *conf = config_file_new_alloc();
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if (!conf)
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return NULL;
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conf->path = NULL;
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conf->entries = NULL;
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conf->tail = NULL;
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conf->last = NULL;
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conf->includes = NULL;
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conf->include_depth = 0;
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conf->guaranteed_no_duplicates = false;
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conf->modified = false;
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if (!string_is_empty(path))
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conf->path = strdup(path);
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if (string_is_empty(lines))
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return conf;
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@ -675,7 +666,7 @@ config_file_t *config_file_new_from_string(char *from_string,
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/* Parse current line */
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if (
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!string_is_empty(line)
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&& parse_line(conf, list, line, NULL))
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&& config_file_parse_line(conf, list, line, NULL))
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{
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if (conf->entries)
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conf->tail->next = list;
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@ -1198,8 +1189,9 @@ void config_file_dump_orbis(config_file_t *conf, int fd)
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includes = includes->next;
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}
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list = merge_sort_linked_list((struct config_entry_list*)
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conf->entries, config_sort_compare_func);
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list = config_file_merge_sort_linked_list(
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(struct config_entry_list*)conf->entries,
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config_file_sort_compare_func);
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conf->entries = list;
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while (list)
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@ -1228,8 +1220,9 @@ void config_file_dump(config_file_t *conf, FILE *file, bool sort)
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}
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if (sort)
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list = merge_sort_linked_list((struct config_entry_list*)
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conf->entries, config_sort_compare_func);
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list = config_file_merge_sort_linked_list(
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(struct config_entry_list*)conf->entries,
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config_file_sort_compare_func);
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else
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list = (struct config_entry_list*)conf->entries;
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