Imported Upstream version 2.6.7

[platform/upstream/harfbuzz.git] / src / hb.hh

diff --git a/src/hb.hh b/src/hb.hh
index fcbd330..3adca88 100644 (file)
--- a/src/hb.hh
+++ b/src/hb.hh
@@ -176,6 +176,7 @@
 
 #include <limits.h>
 #include <math.h>
+#include <float.h>
 #include <stdlib.h>
 #include <stddef.h>
 #include <string.h>
@@ -317,6 +318,18 @@ extern "C" void  hb_free_impl(void *ptr);
 #  define HB_FALLTHROUGH /* FALLTHROUGH */
 #endif
 
+/* A tag to enforce use of return value for a function */
+#if __cplusplus >= 201703L
+#  define HB_NODISCARD [[nodiscard]]
+#elif defined(__GNUC__) || defined(__clang__)
+#  define HB_NODISCARD __attribute__((warn_unused_result))
+#elif defined(_MSC_VER)
+#  define HB_NODISCARD _Check_return_
+#else
+#  define HB_NODISCARD
+#endif
+#define hb_success_t HB_NODISCARD bool
+
 /* https://github.com/harfbuzz/harfbuzz/issues/1852 */
 #if defined(__clang__) && !(defined(_AIX) && (defined(__IBMCPP__) || defined(__ibmxl__)))
 /* Disable certain sanitizer errors. */