Refactor SMS language dialect encoding / decoding

- Introduce new enum gsm_dialect instead of unsigned char arguments
- Use ISO639 3 letter codes for conversion tables
- Use a single lookup table instead of 4 different ones

1 files changed, 12 insertions, 4 deletions

diff --git a/src/util.h b/src/util.h
index 47aa0662..6b34fa17 100644
--- a/src/util.h
+++ b/src/util.h
@@ -19,21 +19,29 @@
  *
  */
 
+enum gsm_dialect {
+	GSM_DIALECT_DEFAULT = 0,
+	GSM_DIALECT_TURKISH,
+	GSM_DIALECT_SPANISH,
+	GSM_DIALECT_PORTUGUESE,
+	GSM_DIALECT_INVALID
+};
+
 char *convert_gsm_to_utf8(const unsigned char *text, long len, long *items_read,
 				long *items_written, unsigned char terminator);
 
 char *convert_gsm_to_utf8_with_lang(const unsigned char *text, long len, long *items_read,
 				long *items_written, unsigned char terminator,
-				unsigned char locking_shift_lang,
-				unsigned char single_shift_lang);
+				enum gsm_dialect locking_shift_lang,
+				enum gsm_dialect single_shift_lang);
 
 unsigned char *convert_utf8_to_gsm(const char *text, long len, long *items_read,
 				long *items_written, unsigned char terminator);
 
 unsigned char *convert_utf8_to_gsm_with_lang(const char *text, long len, long *items_read,
 				long *items_written, unsigned char terminator,
-				unsigned char locking_shift_lang,
-				unsigned char single_shifth_lang);
+				enum gsm_dialect locking_shift_lang,
+				enum gsm_dialect single_shift_lang);
 
 unsigned char *decode_hex_own_buf(const char *in, long len, long *items_written,
 					unsigned char terminator,