(menu_setting) No longer use sscanf for float/uint/int callback functions -

significantly faster when doing it with strtoull/strtod

menu/menu_setting.c

@@ -441,20 +441,23 @@ static int setting_set_with_string_representation(rarch_setting_t* setting,
       case ST_SIZE:
          {
             uint32_t flags = setting->flags;
-            sscanf(value, "%" PRI_SIZET, setting->value.target.sizet);
+            char *end;
+            unsigned long long parsed = strtoull(value, &end, 10);
+            if (end != value && *end == '\0')
+               *setting->value.target.sizet = (size_t)parsed;
             if (flags & SD_FLAG_HAS_RANGE)
             {
-               float min   = setting->min;
-               float max   = setting->max;
-               if (flags & SD_FLAG_ENFORCE_MINRANGE && *setting->value.target.sizet < min)
-                  *setting->value.target.sizet = min;
-               if (flags & SD_FLAG_ENFORCE_MAXRANGE && *setting->value.target.sizet > max)
+               float min = setting->min;
+               float max = setting->max;
+               if (flags & SD_FLAG_ENFORCE_MINRANGE && *setting->value.target.sizet < (size_t)min)
+                  *setting->value.target.sizet = (size_t)min;
+               if (flags & SD_FLAG_ENFORCE_MAXRANGE && *setting->value.target.sizet > (size_t)max)
                {
                   settings_t *settings = config_get_ptr();
                   if (settings && settings->bools.menu_navigation_wraparound_enable)
-                     *setting->value.target.sizet = min;
+                     *setting->value.target.sizet = (size_t)min;
                   else
-                     *setting->value.target.sizet = max;
+                     *setting->value.target.sizet = (size_t)max;
                }
             }
          }
@@ -506,46 +509,32 @@ static int setting_set_with_string_representation(rarch_setting_t* setting,
    return 0;
 }
 
-
 static void menu_input_st_uint_cb(void *userdata, const char *str)
 {
    if (str && *str)
    {
-      const char *ptr          = NULL;
-      unsigned value           = 0;
-      int chars_read           = 0;
-      int ret                  = 0;
-
-      /* Ensure that input string contains a valid
-       * unsigned value
-       * Note: sscanf() will accept negative number
-       * strings here and overflow, so have to check
-       * for minus characters first... */
-      for (ptr = str; *ptr != '\0'; ptr++)
+      const char *ptr = str;
+      /* Reject negative numbers (sscanf %u would silently overflow) */
+      while (*ptr == ' ')
+         ptr++;
+      if (*ptr >= '0' && *ptr <= '9')
       {
-         if (*ptr == '-')
+         char *end            = NULL;
+         unsigned long value  = strtoul(str, &end, 10);
+         /* Ensure entire string was consumed and value fits in unsigned */
+         if (end && *end == '\0' && value <= UINT_MAX)
          {
-            menu_input_dialog_end();
-            return;
-         }
-      }
-
-      ret = sscanf(str, "%u %n", &value, &chars_read);
-
-      if ((ret == 1) && !str[chars_read])
-      {
-         struct menu_state *menu_st  = menu_state_get_ptr();
-         const char *label           = menu_st->input_dialog_kb_label_setting;
-
-         if (!string_is_empty(label))
-         {
-            rarch_setting_t *setting = NULL;
-            if ((setting = menu_setting_find(label)))
-               setting_set_with_string_representation(setting, str);
+            struct menu_state *menu_st  = menu_state_get_ptr();
+            const char *label           = menu_st->input_dialog_kb_label_setting;
+            if (label && *label)
+            {
+               rarch_setting_t *setting = NULL;
+               if ((setting = menu_setting_find(label)))
+                  setting_set_with_string_representation(setting, str);
+            }
          }
       }
    }
-
    menu_input_dialog_end();
 }
 
@@ -553,26 +542,30 @@ static void menu_input_st_int_cb(void *userdata, const char *str)
 {
    if (str && *str)
    {
-      int value         = 0;
-      int chars_read    = 0;
-      /* Ensure that input string contains a valid
-       * unsigned value */
-      int ret           = sscanf(str, "%d %n", &value, &chars_read);
+      const char *ptr = str;
 
-      if ((ret == 1) && !str[chars_read])
+      if (*ptr >= '0' && *ptr <= '9')
       {
-         struct menu_state *menu_st  = menu_state_get_ptr();
-         const char *label           = menu_st->input_dialog_kb_label_setting;
+         while (*ptr >= '0' && *ptr <= '9')
+            ptr++;
 
-         if (!string_is_empty(label))
+         /* Skip trailing whitespace */
+         while (*ptr == ' ' || *ptr == '\t')
+            ptr++;
+
+         if (*ptr == '\0')
          {
-            rarch_setting_t *setting = NULL;
-            if ((setting = menu_setting_find(label)))
-               setting_set_with_string_representation(setting, str);
+            struct menu_state *menu_st  = menu_state_get_ptr();
+            const char *label           = menu_st->input_dialog_kb_label_setting;
+            if (label && *label)
+            {
+               rarch_setting_t *setting = NULL;
+               if ((setting = menu_setting_find(label)))
+                  setting_set_with_string_representation(setting, str);
+            }
          }
       }
    }
-
    menu_input_dialog_end();
 }
 
@@ -580,18 +573,13 @@ static void menu_input_st_float_cb(void *userdata, const char *str)
 {
    if (str && *str)
    {
-      float value     = 0.0f;
-      int chars_read  = 0;
-      /* Ensure that input string contains a valid
-       * floating point value */
-      int ret         = sscanf(str, "%f %n", &value, &chars_read);
-
-      if ((ret == 1) && !str[chars_read])
+      char *end = NULL;
+      (void)strtod(str, &end);
+      if (end != str && *end == '\0')
       {
          struct menu_state *menu_st  = menu_state_get_ptr();
          const char *label           = menu_st->input_dialog_kb_label_setting;
-
-         if (!string_is_empty(label))
+         if (label && *label)
          {
             rarch_setting_t *setting = NULL;
             if ((setting = menu_setting_find(label)))
@@ -599,7 +587,6 @@ static void menu_input_st_float_cb(void *userdata, const char *str)
          }
       }
    }
-
    menu_input_dialog_end();
 }
 
@@ -610,7 +597,7 @@ static void menu_input_st_string_cb(void *userdata, const char *str)
       struct menu_state *menu_st  = menu_state_get_ptr();
       const char *label           = menu_st->input_dialog_kb_label_setting;
 
-      if (!string_is_empty(label))
+      if (label && *label)
       {
          rarch_setting_t *setting = NULL;
          if ((setting = menu_setting_find(label)))
@@ -2595,7 +2582,8 @@ static int setting_action_ok_bind_all_save_autoconfig(
    map          = settings->uints.input_joypad_index[index_offset];
    name         = input_config_get_device_name(map);
 
-   if (    !string_is_empty(name)
+   if (      name
+         && *name
          && config_save_autoconf_profile(name, map))
    {
       int i;
@@ -2859,7 +2847,7 @@ static int setting_action_right_retropad_bind(
 #if defined(HAVE_NETWORKING)
 static void setting_action_ok_color_rgb_cb(void *userdata, const char *line)
 {
-   if (!string_is_empty(line))
+   if (line && *line)
    {
       struct menu_state *menu_st  = menu_state_get_ptr();
       const char *label           = menu_st->input_dialog_kb_label_setting;
@@ -6911,7 +6899,7 @@ static size_t setting_get_string_representation_uint_libretro_device(
             break;
       }
    }
-   if (!string_is_empty(name))
+   if (name && *name)
       return strlcpy(s, name, len);
    return 0;
 }
@@ -6956,7 +6944,7 @@ static size_t setting_get_string_representation_uint_analog_dpad_mode(
          break;
    }
 
-   if (!string_is_empty(name))
+   if (name && *name)
       return strlcpy(s, name, len);
    return 0;
 }
@@ -8303,11 +8291,11 @@ static size_t get_string_representation_input_device_index(
       _len = snprintf(s, len,
             "#%u: %s",
             map + 1,
-            !string_is_empty(device_name)
+            (device_name && *device_name)
                   ? device_name
                   : msg_hash_to_str(MENU_ENUM_LABEL_VALUE_NOT_AVAILABLE));
 
-      if (!string_is_empty(device_name))
+      if (device_name && *device_name)
       {
          unsigned idx = input_config_get_device_name_index(map);
 
@@ -8317,7 +8305,7 @@ static size_t get_string_representation_input_device_index(
       }
    }
 
-   if (string_is_empty(s))
+   if (s && *s)
       _len = strlcpy(s, msg_hash_to_str(MENU_ENUM_LABEL_VALUE_DISABLED), len);
    return _len;
 }
@@ -8339,8 +8327,7 @@ static size_t get_string_representation_input_device_reservation_type(
    return strlcpy(s, msg_hash_to_str(MENU_ENUM_LABEL_VALUE_DISABLED), len);
 }
 
-static size_t setting_get_string_representation_input_device_reserved_device_name(
-        rarch_setting_t *setting, char *s, size_t len)
+static size_t setting_get_string_representation_input_device_reserved_device_name(rarch_setting_t *setting, char *s, size_t len)
 {
    unsigned int dev_vendor_id;
    unsigned int dev_product_id;
@@ -8372,14 +8359,14 @@ static size_t get_string_representation_input_mouse_index(
       _len = snprintf(s, len,
             "#%u: %s",
             map + 1,
-            !string_is_empty(device_name)
+            (device_name && *device_name)
                   ? device_name
                   : (map > 0)
                         ? msg_hash_to_str(MENU_ENUM_LABEL_VALUE_NOT_AVAILABLE)
                         : msg_hash_to_str(MENU_ENUM_LABEL_VALUE_DONT_CARE));
    }
 
-   if (string_is_empty(s))
+   if (s && *s)
       _len = strlcpy(s, msg_hash_to_str(MENU_ENUM_LABEL_VALUE_DISABLED), len);
    return _len;
 }
@@ -9234,8 +9221,9 @@ static void general_write_handler(rarch_setting_t *setting)
              * force a cache refresh on the next
              * core info initialisation */
             if (*setting->value.target.boolean)
-               if (!core_info_cache_force_refresh(!string_is_empty(path_libretro_info)
-                     ? path_libretro_info : dir_libretro))
+               if (!core_info_cache_force_refresh(
+                    (path_libretro_info && *path_libretro_info)
+                   ? path_libretro_info : dir_libretro))
                {
                   const char *_msg = msg_hash_to_str(MSG_CORE_INFO_CACHE_UNSUPPORTED);
                   /* core_info_cache_force_refresh() will fail
@@ -10013,7 +10001,7 @@ static bool setting_append_list_input_player_options(
             const char *input_desc_btn;
 
             input_desc_btn = sys_info->input_desc_btn[user][i];
-            if (!string_is_empty(input_desc_btn))
+            if (input_desc_btn && *input_desc_btn)
             {
                char input_description[NAME_MAX_LENGTH];
                /* > Up to RARCH_FIRST_CUSTOM_BIND, inputs