1 files changed, 47 insertions, 0 deletions
diff --git a/libparsepcf_get_property_subtable.c b/libparsepcf_get_property_subtable.c
new file mode 100644
index 0000000..d19498c
--- /dev/null
+++ b/libparsepcf_get_property_subtable.c
@@ -0,0 +1,47 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+libparsepcf_get_property_subtable(const char *file, size_t size,
+                                  const struct libparsepcf_table *table,
+                                  const struct libparsepcf_properties *meta,
+                                  struct libparsepcf_property_subtable *props,
+                                    size_t first, size_t count)
+{
+	int msb = table->format & LIBPARSEPCF_BYTE;
+	size_t pos = table->offset + 8 + first * 9;
+	size_t i, off, maxlen;
+
+	(void) size;
+
+	for (i = 0; i < count; i++, pos += 9) {
+		off = (size_t)PARSE_UINT32(&file[pos + 0], msb);
+		if (off > meta->strings_size)
+			goto ebfont;
+		maxlen = meta->strings_size - off;
+		props[i].name = &meta->strings[off];
+		if (!memchr(props[i].name, 0, maxlen))
+			goto ebfont;
+
+		props[i].is_string_property = !!file[pos + 4];
+
+		if (props[i].is_string_property) {
+			off = (size_t)PARSE_UINT32(&file[pos + 5], msb);
+			if (off > meta->strings_size)
+				goto ebfont;
+			maxlen = meta->strings_size - off;
+			props[i].value.string_value = &meta->strings[off];
+			if (!memchr(props[i].value.string_value, 0, maxlen))
+				goto ebfont;
+		} else {
+			props[i].value.signed_value = PARSE_INT32(&file[pos + 5], msb);
+		}
+	}
+
+	return 0;
+
+ebfont:
+	errno = EBFONT;
+	return -1;
+}