Implement fz_text_language support functions.

Add code to convert to and from fz_text_language codes from
ISO 639 language strings. No validation is carried out.

1 files changed, 21 insertions, 2 deletions

diff --git a/include/mupdf/fitz/text.h b/include/mupdf/fitz/text.h
index 682517c4..84f72957 100644
--- a/include/mupdf/fitz/text.h
+++ b/include/mupdf/fitz/text.h
@@ -39,7 +39,7 @@ typedef enum fz_text_direction_e
 
 typedef enum fz_text_language_e
 {
-	fz_lang_unset = 0
+	FZ_LANG_UNSET = 0
 	/* FIXME: Fill in more */
 } fz_text_language;
 
@@ -50,7 +50,7 @@ struct fz_text_span_s
 	int wmode : 1;		/* 0 horizontal, 1 vertical */
 	int bidi_level : 7;	/* The bidirectional level of text */
 	int markup_dir : 2;	/* The direction of text as marked in the original document */
-	int language : 8;	/* The language as marked in the original document */
+	int language : 15;	/* The language as marked in the original document */
 	int len, cap;
 	fz_text_item *items;
 	fz_text_span *next;
@@ -72,4 +72,23 @@ fz_rect *fz_bound_text(fz_context *ctx, const fz_text *text, const fz_stroke_sta
 
 fz_text *fz_clone_text(fz_context *ctx, const fz_text *text);
 
+/*
+	Convert ISO 639 (639-{1,2,3,5}) language specification
+	strings losslessly to a 15 bit fz_text_language code.
+
+	No validation is carried out. Obviously invalid (out
+	of spec) codes will be mapped to FZ_LANG_UNSET, but
+	well-formed (but undefined) codes will be blithely
+	accepted.
+*/
+fz_text_language fz_text_language_from_string(const char *str);
+
+/*
+	Recover ISO 639 (639-{1,2,3,5}) language specification
+	strings losslessly from a 15 bit fz_text_language code.
+
+	No validation is carried out. See note above.
+*/
+char *fz_string_from_text_language(char str[4], fz_text_language lang);
+
 #endif