X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=include%2Fbabeltrace%2Fbabeltrace-internal.h;h=981f84b186910cd7145fe04cb93c30805752e36c;hb=5b9e151d6a8c0327e67bca1706ef16525d1d319d;hp=1bdd79ece3ee19e6ca5b6005f9cf9ed21b6adf09;hpb=b4565e8b2e0f7c0e356919fe95b760bed7a71d1b;p=babeltrace.git

diff --git a/include/babeltrace/babeltrace-internal.h b/include/babeltrace/babeltrace-internal.h
index 1bdd79ec..981f84b1 100644
--- a/include/babeltrace/babeltrace-internal.h
+++ b/include/babeltrace/babeltrace-internal.h
@@ -2,8 +2,6 @@
 #define _BABELTRACE_INTERNAL_H
 
 /*
- * babeltrace/babeltrace-internal.h
- *
  * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -28,6 +26,7 @@
 #include <glib.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include <stdbool.h>
 #include <errno.h>
 #include <babeltrace/compat/string-internal.h>
 #include <babeltrace/types.h>
@@ -63,6 +62,38 @@
 	((type) (a) > (type) (b) ? (type) (a) : (type) (b))
 #endif
 
+static inline
+bool bt_safe_to_mul_int64(int64_t a, int64_t b)
+{
+	if (a == 0 || b == 0) {
+		return true;
+	}
+
+	return a < INT64_MAX / b;
+}
+
+static inline
+bool bt_safe_to_mul_uint64(uint64_t a, uint64_t b)
+{
+	if (a == 0 || b == 0) {
+		return true;
+	}
+
+	return a < UINT64_MAX / b;
+}
+
+static inline
+bool bt_safe_to_add_int64(int64_t a, int64_t b)
+{
+	return a <= INT64_MAX - b;
+}
+
+static inline
+bool bt_safe_to_add_uint64(uint64_t a, uint64_t b)
+{
+	return a <= UINT64_MAX - b;
+}
+
 /*
  * Memory allocation zeroed
  */
@@ -79,7 +110,12 @@
 #define BT_HIDDEN __attribute__((visibility("hidden")))
 #endif
 
+#ifndef __STRINGIFY
 #define __STRINGIFY(x)	#x
+#endif
+
 #define TOSTRING(x)	__STRINGIFY(x)
 
+#define BT_UNUSED	__attribute__((unused))
+
 #endif