Add internal API for buffer var allocation
diff --git a/src/hb-buffer.cc b/src/hb-buffer.cc
index 716f858..2b5760d 100644
--- a/src/hb-buffer.cc
+++ b/src/hb-buffer.cc
@@ -153,6 +153,8 @@
out_len = 0;
serial = 0;
+ memset (allocated_var_bytes, 0, sizeof allocated_var_bytes);
+ memset (allocated_var_owner, 0, sizeof allocated_var_owner);
out_info = info;
}
@@ -387,6 +389,26 @@
}
+void hb_buffer_t::allocate_var (unsigned int byte_i, unsigned int count, const char *owner)
+{
+ assert (byte_i < 8 && byte_i + count < 8);
+ for (unsigned int i = byte_i; i < byte_i + count; i++) {
+ assert (!allocated_var_bytes[i]);
+ allocated_var_bytes[i]++;
+ allocated_var_owner[i] = owner;
+ }
+}
+
+void hb_buffer_t::deallocate_var (unsigned int byte_i, unsigned int count, const char *owner)
+{
+ assert (byte_i < 8 && byte_i + count < 8);
+ for (unsigned int i = byte_i; i < byte_i + count; i++) {
+ assert (allocated_var_bytes[i] && allocated_var_owner[i] == owner);
+ allocated_var_bytes[i]--;
+ }
+}
+
+
/* Public API */
hb_buffer_t *
