[utf8] Moving language length constant

src/constants.h

@@ -7,4 +7,7 @@
 #define NAMESPACE_SEPARATOR_CHAR "|"
 #define NAMESPACE_SEPARATOR_CHAR_LEN strlen(NAMESPACE_SEPARATOR_CHAR)
 
+// Supports ISO 639 alpha 2 and alpha 3 codes
+#define MAX_LANGUAGE_LEN 4
+
 #endif

src/transliterate.h

@@ -72,13 +72,6 @@ KHASH_MAP_INIT_STR(str_transliterator, transliterator_t *)
 #define kh_script_lang_hash(key)  ((uint64_t)(key).script ^ (((key).language == NULL) ? 0 : kh_str_hash_func((key).language)))
 #define kh_script_lang_equal(a, b)  (((a).script == (b).script) && strcmp((a).language, (b).language) == 0)
 
-#define MAX_LANGUAGE_LEN 4
-
-typedef struct script_language {
-    script_t script;
-    char language[MAX_LANGUAGE_LEN];
-} script_language_t;
-
 typedef struct transliterator_index {
     size_t transliterator_index;
     size_t num_transliterators;

src/unicode_scripts.h

@@ -2,6 +2,7 @@
 #define UNICODE_SCRIPTS_H
 
 #include <stdlib.h>
+#include "constants.h"
 #include "utf8proc/utf8proc.h"
 #include "unicode_script_types.h"
 
@@ -10,6 +11,11 @@ typedef struct script_code {
     char *code;
 } script_code_t;
 
+typedef struct script_language {
+    script_t script;
+    char language[MAX_LANGUAGE_LEN];
+} script_language_t;
+
 typedef struct script_languages {
     size_t num_languages;
     char *languages[MAX_LANGS];