1 files changed, 88 insertions, 0 deletions
diff --git a/misc/ttf2woff/readwoff.c b/misc/ttf2woff/readwoff.c
new file mode 100644
index 000000000..566eaea3e
--- /dev/null
+++ b/misc/ttf2woff/readwoff.c
@@ -0,0 +1,88 @@
+/*
+ *	Copyright (C) 2013 Jan Bobrowski <jb@wizard.ae.krakow.pl>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	version 2 as published by the Free Software Foundation.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <zlib.h>
+#include "ttf2woff.h"
+
+static struct buf get_or_inflate(u8 *p, size_t len, size_t orig_len)
+{
+	struct buf buf;
+	uLongf blen;
+	char *m;
+	int v;
+
+	if(len == orig_len) {
+		buf.ptr = p;
+		buf.len = len;
+		return buf;
+	}
+
+	buf.len = orig_len;
+	buf.ptr = my_alloc(orig_len);
+
+	blen = buf.len;
+	v = uncompress(buf.ptr, &blen, p, len);
+	switch(v) {
+	case Z_OK:
+		if(blen==buf.len)
+			return buf;
+	case Z_MEM_ERROR: m = "BAD_FONT uncompressed length"; break;
+	case Z_DATA_ERROR: m = "Data corrupted"; ; break;
+	default: m = "Error";
+	}
+
+	errx(3, "zlib: %s", m);
+}
+
+void read_woff(struct ttf *ttf, u8 *data, size_t length)
+{
+	u8 *p;
+	int i;
+
+	if(length<=44+20) BAD_FONT;
+
+	ttf->flavor = g32(data+4);
+
+	if(g32(data+8) != length) BAD_FONT;
+
+	ttf->ntables = g16(data+12);
+	if(!ttf->ntables) BAD_FONT;
+
+	{
+		u32 len=g32(data+28), off;
+		ttf->woff_meta.len = 0;
+		if(len) {
+			off = g32(data+24);
+			if((off|len)>length || off+len>length)
+				BAD_FONT;
+			ttf->woff_meta = get_or_inflate(data+off, len, g32(data+32));
+		}
+	}
+
+	ttf->woff_priv.len = g32(data+40);
+	ttf->woff_priv.ptr = ttf->woff_priv.len ? data+g32(data+36) : 0;
+
+	alloc_tables(ttf);
+
+	p = data+44;
+	for(i=0; i<ttf->ntables; i++) {
+		struct table *t = &ttf->tables[i];
+		u32 off=g32(p+4), len=g32(p+8);
+		if((off|len)>length || off+len>length)
+			BAD_FONT;
+		t->tag = g32(p);
+		t->csum = g32(p+16);
+		t->pos = off;
+		t->free_buf = 1;
+		t->buf = get_or_inflate(data+off, len, g32(p+12));
+		name_table(t);
+		p += 20;
+	}
+}