First commit

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 44 insertions, 0 deletions

diff --git a/hmtx.c b/hmtx.c
new file mode 100644
index 0000000..bb63af5
--- /dev/null
+++ b/hmtx.c
@@ -0,0 +1,44 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+libparsesfnt_parse_hmtx(
+			const char *data, size_t size,
+			struct libparsesfnt_hmtx_entry *infop,
+			const struct libparsesfnt_tabdir_entry *tag,
+			size_t first, size_t count)
+{
+	return PARSE(LIBPARSESFNT_HMTX_ENTRY__, tag->offset, 0, 0, first, count, tag);
+}
+
+
+int
+libparsesfnt_get_hmtx_lsb_subtable_length(
+			size_t *lengthp,
+			const struct libparsesfnt_tabdir_entry *tag, const struct libparsesfnt_hhea *hhea)
+{
+	size_t off;
+	/* hhea->num_advances_in_hmtx_table is uint16_t, so overflow is impossible */
+	off = (size_t)hhea->num_advances_in_hmtx_table * 4;
+	if (off > tag->length || (tag->length - off) % 2) {
+		errno = EBFONT;
+		return -1;
+	}
+	*lengthp = (tag->length - off) / 2;
+	return 0;
+}
+
+
+int
+libparsesfnt_parse_hmtx_lsb_subtable(
+			const char *data, size_t size,
+			struct libparsesfnt_hmtx_lsb_subtable_entry *infop,
+			const struct libparsesfnt_tabdir_entry *tag, const struct libparsesfnt_hhea *hhea,
+			size_t first, size_t count)
+{
+	size_t off;
+	/* hhea->num_advances_in_hmtx_table is uint16_t, so overflow is impossible */
+	off = (size_t)hhea->num_advances_in_hmtx_table * 4;
+	return PARSE(LIBPARSESFNT_HMTX_LSB_SUBTABLE_ENTRY__, tag->offset, off, 0, first, count, NULL);
+}