1 files changed, 44 insertions, 0 deletions
diff --git a/vmtx.c b/vmtx.c
new file mode 100644
index 0000000..e6c83fc
--- /dev/null
+++ b/vmtx.c
@@ -0,0 +1,44 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+libparsesfnt_parse_vmtx(
+			const char *data, size_t size,
+			struct libparsesfnt_vmtx_entry *infop,
+			const struct libparsesfnt_tabdir_entry *tag,
+			size_t first, size_t count)
+{
+	return PARSE(LIBPARSESFNT_VMTX_ENTRY__, tag->offset, 0, 0, first, count, tag);
+}
+
+
+int
+libparsesfnt_get_vmtx_tsb_subtable_length(
+			size_t *lengthp,
+			const struct libparsesfnt_tabdir_entry *tag, const struct libparsesfnt_vhea *vhea)
+{
+	size_t off;
+	/* vhea->num_advances_in_vmtx_table is uint16_t, so overflow is impossible */
+	off = (size_t)vhea->num_advances_in_vmtx_table * 4;
+	if (off > tag->length || (tag->length - off) % 2) {
+		errno = EBFONT;
+		return -1;
+	}
+	*lengthp = (tag->length - off) / 2;
+	return 0;
+}
+
+
+int
+libparsesfnt_parse_vmtx_tsb_subtable(
+			const char *data, size_t size,
+			struct libparsesfnt_vmtx_tsb_subtable_entry *infop,
+			const struct libparsesfnt_tabdir_entry *tag, const struct libparsesfnt_vhea *vhea,
+			size_t first, size_t count)
+{
+	size_t off;
+	/* vhea->num_advances_in_vmtx_table is uint16_t, so overflow is impossible */
+	off = (size_t)vhea->num_advances_in_vmtx_table * 4;
+	return PARSE(LIBPARSESFNT_VMTX_TSB_SUBTABLE_ENTRY__, tag->offset, off, 0, first, count, NULL);
+}