Added qsort.

[pdclib] / internals / _PDCLIB_config.h

diff --git a/internals/_PDCLIB_config.h b/internals/_PDCLIB_config.h
index 5e22b527478bbe20d4fc9f2501b450497b3afbb3..d2188ff112f8657124884bf3b54dd700138fa2ca 100644 (file)
--- a/internals/_PDCLIB_config.h
+++ b/internals/_PDCLIB_config.h
@@ -16,6 +16,18 @@
 /* The character (sequence) your platform uses as newline.                    */
 #define _PDCLIB_endl "\n"
 
+/* exit() can signal success to the host environment by the value of zero or  */
+/* the constant EXIT_SUCCESS. Failure is signaled by EXIT_FAILURE. Note that  */
+/* any other return value is "implementation-defined", i.e. your environment  */
+/* is not required to handle it gracefully. Set your definitions here.        */
+#define _PDCLIB_SUCCESS 0
+#define _PDCLIB_FAILURE -1
+
+/* qsort() in <stdlib.h> requires a function that swaps two memory areas.     */
+/* Below is a naive implementation that can be improved significantly for     */
+/* specific platforms, e.g. by swapping int instead of char.                  */
+#define _PDCLIB_memswp( i, j, size ) char tmp; do { tmp = *i; *i++ = *j; *j++ = tmp; } while ( --size );
+
 /* -------------------------------------------------------------------------- */
 /* Integers                                                                   */
 /* -------------------------------------------------------------------------- */