BLI_assert: extract from BLI_utildefines

BLI_utildefines is quite large, defining many unrelated things.
Add BLI_assert to include in inline headers, so math defines don't
pull in too much.

1 files changed, 111 insertions, 0 deletions

diff --git a/source/blender/blenlib/BLI_assert.h b/source/blender/blenlib/BLI_assert.h
new file mode 100644
index 00000000000..9fb0954e77f
--- /dev/null
+++ b/source/blender/blenlib/BLI_assert.h
@@ -0,0 +1,111 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __BLI_ASSERT_H__
+#define __BLI_ASSERT_H__
+
+/** \file BLI_assert.h
+ *  \ingroup bli
+ *
+ * Defines:
+ * - #BLI_assert
+ * - #BLI_STATIC_ASSERT
+ * - #BLI_STATIC_ASSERT_ALIGN
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef NDEBUG /* for BLI_assert */
+#include <stdio.h>
+#endif
+
+/* BLI_assert(), default only to print
+ * for aborting need to define WITH_ASSERT_ABORT
+ */
+/* For 'abort' only. */
+#include <stdlib.h>
+
+#ifndef NDEBUG
+#  include "BLI_system.h"
+#  ifdef WITH_ASSERT_ABORT
+#    define _BLI_DUMMY_ABORT abort
+#  else
+#    define _BLI_DUMMY_ABORT() (void)0
+#  endif
+#  if defined(__GNUC__) || defined(_MSC_VER) /* check __func__ is available */
+#    define BLI_assert(a)                                                     \
+	(void)((!(a)) ?  (                                                        \
+		(                                                                     \
+		BLI_system_backtrace(stderr),                                         \
+		fprintf(stderr,                                                       \
+			"BLI_assert failed: %s:%d, %s(), at \'%s\'\n",                    \
+			__FILE__, __LINE__, __func__, "" #a),                             \
+		_BLI_DUMMY_ABORT(),                                                   \
+		NULL)) : NULL)
+#  else
+#    define BLI_assert(a)                                                     \
+	(void)((!(a)) ?  (                                                        \
+		(                                                                     \
+		fprintf(stderr,                                                       \
+			"BLI_assert failed: %s:%d, at \'%s\'\n",                          \
+			__FILE__, __LINE__, "" #a),                                       \
+		_BLI_DUMMY_ABORT(),                                                   \
+		NULL)) : NULL)
+#  endif
+#else
+#  define BLI_assert(a) (void)0
+#endif
+
+/* C++ can't use _Static_assert, expects static_assert() but c++0x only,
+ * Coverity also errors out. */
+#if (!defined(__cplusplus)) && \
+    (!defined(__COVERITY__)) && \
+    (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 406))  /* gcc4.6+ only */
+#  define BLI_STATIC_ASSERT(a, msg) __extension__ _Static_assert(a, msg);
+#else
+/* Code adapted from http://www.pixelbeat.org/programming/gcc/static_assert.html */
+/* Note we need the two concats below because arguments to ## are not expanded, so we need to
+ * expand __LINE__ with one indirection before doing the actual concatenation. */
+#  define ASSERT_CONCAT_(a, b) a##b
+#  define ASSERT_CONCAT(a, b) ASSERT_CONCAT_(a, b)
+   /* These can't be used after statements in c89. */
+#  if defined(__COUNTER__)  /* MSVC */
+#    define BLI_STATIC_ASSERT(a, msg) \
+         ; enum { ASSERT_CONCAT(static_assert_, __COUNTER__) = 1 / (int)(!!(a)) };
+#  else  /* older gcc, clang... */
+    /* This can't be used twice on the same line so ensure if using in headers
+     * that the headers are not included twice (by wrapping in #ifndef...#endif)
+     * Note it doesn't cause an issue when used on same line of separate modules
+     * compiled with gcc -combine -fwhole-program. */
+#    define BLI_STATIC_ASSERT(a, msg) \
+         ; enum { ASSERT_CONCAT(assert_line_, __LINE__) = 1 / (int)(!!(a)) };
+#  endif
+#endif
+
+#define BLI_STATIC_ASSERT_ALIGN(st, align) \
+  BLI_STATIC_ASSERT((sizeof(st) % (align) == 0), "Structure must be strictly aligned")
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* __BLI_ASSERT_H__ */