Replace some usage of strchr with memchr

Author: LibretroAdmin

gfx/drivers/vulkan.c

@@ -1768,8 +1768,9 @@ static void vulkan_font_render_message(vk_t *vk,
 
    for (;;)
    {
-      const char *delim = strchr(msg, '\n');
-      size_t msg_len    = delim ? (size_t)(delim - msg) : strlen(msg);
+      size_t _msg_len   = strlen(msg);
+      const char *delim = memchr(msg, '\n', _msg_len + 1);
+      size_t msg_len    = delim ? (size_t)(delim - msg) : _msg_len;
 
       /* Draw the line */
       vulkan_font_render_line(vk, font, glyph_q, msg, msg_len,

libretro-common/formats/json/rjson.c

@@ -1011,7 +1011,7 @@ double rjson_get_double(rjson_t *json)
          snprintf(test, sizeof(test), "%.1f", 0.0f);
          json->decimal_sep = test[1];
       }
-      if (json->decimal_sep != '.' && (p = strchr(str, '.')) != NULL)
+      if (json->decimal_sep != '.' && (p = memchr(str, '.', strlen(str) + 1)) != NULL)
       {
          double res;
          *p  = json->decimal_sep;

menu/menu_displaylist.c

@@ -317,7 +317,7 @@ static int filebrowser_parse(
       default:
          /* if a core has / in its list of supported extensions, the core
             supports loading of directories on the host file system */
-         if (exts && strchr(exts, '/'))
+         if (exts && memchr(exts, '/', strlen(exts) + 1))
             menu_entries_prepend(info_list,
                   msg_hash_to_str(MENU_ENUM_LABEL_VALUE_USE_THIS_DIRECTORY),
                   msg_hash_to_str(MENU_ENUM_LABEL_USE_THIS_DIRECTORY),