Turn string_is_equal_noncase into self-contained function

libretro-common/file/config_file.c

@@ -745,13 +745,13 @@ bool config_get_bool(config_file_t *conf, const char *key, bool *in)
 
    if (entry)
    {
-      if (strcasecmp(entry->value, "true") == 0)
+      if (string_is_equal_noncase(entry->value, "true"))
          *in = true;
-      else if (strcasecmp(entry->value, "1") == 0)
+      else if (string_is_equal_noncase(entry->value, "1"))
          *in = true;
-      else if (strcasecmp(entry->value, "false") == 0)
+      else if (string_is_equal_noncase(entry->value, "false"))
          *in = false;
-      else if (strcasecmp(entry->value, "0") == 0)
+      else if (string_is_equal_noncase(entry->value, "0"))
          *in = false;
       else
          return false;

libretro-common/include/string/stdstring.h

@@ -25,6 +25,7 @@
 
 #include <stdlib.h>
 #include <stddef.h>
+#include <ctype.h>
 #include <string.h>
 #include <boolean.h>
 
@@ -49,7 +50,27 @@ static INLINE bool string_is_equal(const char *a, const char *b)
 
 static INLINE bool string_is_equal_noncase(const char *a, const char *b)
 {
-   return (a && b) ? (strcasecmp(a, b) == 0) : false;
+   bool ret;
+   int i;
+   char *cp1, *cp2;
+
+   if (!a || !b)
+      return false;
+
+   cp1 = (char*)malloc(strlen(a) + 1);
+   cp2 = (char*)malloc(strlen(b) + 1);
+
+   for (i = 0; i < strlen(a) + 1; i++)
+      cp1[i] = tolower((int) (unsigned char) a[i]);
+   for (i = 0; i < strlen(b) + 1; i++)
+      cp2[i] = tolower((int) (unsigned char) b[i]);
+
+   ret = string_is_equal(cp1, cp2);
+
+   free(cp1);
+   free(cp2);
+
+   return ret;
 }
 
 char *string_to_upper(char *s);

libretro-common/lists/file_list.c

@@ -27,6 +27,7 @@
 #include <retro_assert.h>
 #include <retro_common.h>
 #include <lists/file_list.h>
+#include <string/stdstring.h>
 #include <compat/strcasestr.h>
 
 /**

libretro-common/lists/string_list.c

@@ -28,6 +28,7 @@
 #include <retro_assert.h>
 #include <compat/strl.h>
 #include <compat/posix_string.h>
+#include <string/stdstring.h>
 
 /**
  * string_list_free
@@ -268,7 +269,7 @@ int string_list_find_elem(const struct string_list *list, const char *elem)
 
    for (i = 0; i < list->size; i++)
    {
-      if (strcasecmp(list->elems[i].data, elem) == 0)
+      if (string_is_equal_noncase(list->elems[i].data, elem))
          return (int)(i + 1);
    }
 
@@ -302,8 +303,8 @@ bool string_list_find_elem_prefix(const struct string_list *list,
 
    for (i = 0; i < list->size; i++)
    {
-      if (strcasecmp(list->elems[i].data, elem) == 0 ||
+      if (string_is_equal_noncase(list->elems[i].data, elem) ||
-            strcasecmp(list->elems[i].data, prefixed) == 0)
+            string_is_equal_noncase(list->elems[i].data, prefixed) == 0)
          return true;
    }