+static inline void
+dump_var_allocation (const hb_buffer_t *buffer)
+{
+ char buf[80];
+ for (unsigned int i = 0; i < 8; i++)
+ buf[i] = '0' + buffer->allocated_var_bytes[7 - i];
+ buf[8] = '\0';
+ DEBUG_MSG (BUFFER, buffer,
+ "Current var allocation: %s",
+ buf);
+}
+
+void hb_buffer_t::allocate_var (unsigned int byte_i, unsigned int count, const char *owner)
+{
+ assert (byte_i < 8 && byte_i + count <= 8);
+
+ if (DEBUG_ENABLED (BUFFER))
+ dump_var_allocation (this);
+ DEBUG_MSG (BUFFER, this,
+ "Allocating var bytes %d..%d for %s",
+ byte_i, byte_i + count - 1, owner);
+
+ 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)
+{
+ if (DEBUG_ENABLED (BUFFER))
+ dump_var_allocation (this);
+
+ DEBUG_MSG (BUFFER, this,
+ "Deallocating var bytes %d..%d for %s",
+ byte_i, byte_i + count - 1, 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]);
+ assert (0 == strcmp (allocated_var_owner[i], owner));
+ allocated_var_bytes[i]--;
+ }
+}
+
+void hb_buffer_t::assert_var (unsigned int byte_i, unsigned int count, const char *owner)
+{
+ if (DEBUG_ENABLED (BUFFER))
+ dump_var_allocation (this);
+
+ DEBUG_MSG (BUFFER, this,
+ "Asserting var bytes %d..%d for %s",
+ byte_i, byte_i + count - 1, 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]);
+ assert (0 == strcmp (allocated_var_owner[i], owner));
+ }
+}
+
+void hb_buffer_t::deallocate_var_all (void)
+{
+ memset (allocated_var_bytes, 0, sizeof (allocated_var_bytes));
+ memset (allocated_var_owner, 0, sizeof (allocated_var_owner));
+}
+