path_parent_dir - don't do implicit strlen inside

configuration.c

@@ -5207,7 +5207,7 @@ bool input_remapping_save_file(const char *path)
 
    /* Create output directory, if required */
    strlcpy(remap_file_dir, path, sizeof(remap_file_dir));
-   path_parent_dir(remap_file_dir);
+   path_parent_dir(remap_file_dir, strlen(remap_file_dir));
 
    if (!string_is_empty(remap_file_dir) &&
        !path_is_directory(remap_file_dir) &&

frontend/drivers/platform_ps2.c

@@ -370,8 +370,9 @@ static void frontend_ps2_init(void *data)
 
    getcwd(cwd, sizeof(cwd));
 #if !defined(IS_SALAMANDER) && !defined(DEBUG)
-   // If it is not salamander we need to go one level up for set the CWD.
-   path_parent_dir(cwd);
+   /* If it is not Salamander, we need to go one level 
+    * up for setting the CWD. */
+   path_parent_dir(cwd, strlen(cwd));
 #endif
    if (pfsModuleLoaded)
       hddMounted = mount_hdd_partition();

libretro-common/file/file_path.c

@@ -449,9 +449,12 @@ bool fill_pathname_parent_dir_name(char *out_dir,
 void fill_pathname_parent_dir(char *out_dir,
       const char *in_dir, size_t size)
 {
+   size_t len = 0;
    if (out_dir != in_dir)
-      strlcpy(out_dir, in_dir, size);
-   path_parent_dir(out_dir);
+      len = strlcpy(out_dir, in_dir, size);
+   else
+      len = strlen(out_dir);
+   path_parent_dir(out_dir, len);
 }
 
 /**
@@ -538,20 +541,17 @@ void path_basedir(char *path)
 /**
  * path_parent_dir:
  * @path               : path
+ * @len                : length of @path
  *
  * Extracts parent directory by mutating path.
  * Assumes that path is a directory. Keeps trailing '/'.
  * If the path was already at the root directory, returns empty string
  **/
-void path_parent_dir(char *path)
+void path_parent_dir(char *path, size_t len)
 {
-   size_t len = 0;
-
    if (!path)
       return;
    
-   len = strlen(path);
-
    if (len && PATH_CHAR_IS_SLASH(path[len - 1]))
    {
       bool path_was_absolute = path_is_absolute(path);

libretro-common/file/file_path_io.c

@@ -121,7 +121,7 @@ bool path_mkdir(const char *dir)
    if (!(basedir = strdup(dir)))
       return false;
 
-   path_parent_dir(basedir);
+   path_parent_dir(basedir, strlen(basedir));
 
    if (!*basedir || !strcmp(basedir, dir))
    {

libretro-common/include/file/file_path.h

@@ -161,12 +161,13 @@ void path_basedir(char *path);
 /**
  * path_parent_dir:
  * @path               : path
+ * @len                : length of @path
  *
  * Extracts parent directory by mutating path.
  * Assumes that path is a directory. Keeps trailing '/'.
  * If the path was already at the root directory, returns empty string
  **/
-void path_parent_dir(char *path);
+void path_parent_dir(char *path, size_t len);
 
 /**
  * path_resolve_realpath: