Initial load with header templates and some first declarations.

[pdclib] / includes / assert.h

diff --git a/includes/assert.h b/includes/assert.h
new file mode 100644 (file)
index 0000000..e4363f5
--- /dev/null
+++ b/includes/assert.h
@@ -0,0 +1,38 @@
+// ----------------------------------------------------------------------------
+// $Id$
+// ----------------------------------------------------------------------------
+// Public Domain C Library - http://pdclib.sourceforge.net
+// This code is Public Domain. Use, modify, and redistribute at will.
+// ----------------------------------------------------------------------------
+// Provides the debug macro assert().
+// ----------------------------------------------------------------------------
+
+#ifndef __ASSERT_H
+#define __ASSERT_H __ASSERT_H
+
+// ----------------------------------------------------------------------------
+// AUXILIARY
+
+// Helper function doing the print to stderr and call to abort().
+void __assert( char const * const expression, // the tested expression
+               char const * const file,       // name of source file
+               char const * const function,   // name of function
+               int const line );              // number of source file line
+
+// ----------------------------------------------------------------------------
+// DEFINES
+
+// TODO: <void expression> is given as (void) 0, which might give a "C style
+// cast" warning under C++. Find a void expression that does not give warnings.
+
+// TODO: Check the macro for if-compatibility.
+
+#undef assert
+#if defined NDEBUG
+#define assert( x ) <void expression>
+#else
+#define assert( x ) ( x ) ? <void expression> \
+                          :  __assert( #x, __FILE__, __func__, __LINE__ )
+#endif
+
+#endif // __ASSERT_H