From 7e0f021a9aec35fd8e6725e87e3313b101d26f5e Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Sun, 27 Jan 2008 11:37:44 +0100
Subject: Initial import (2.0.2-6)

---
 reference/C/CONTRIB/SNIP/fpswitch.c | 81 +++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100755 reference/C/CONTRIB/SNIP/fpswitch.c

(limited to 'reference/C/CONTRIB/SNIP/fpswitch.c')

diff --git a/reference/C/CONTRIB/SNIP/fpswitch.c b/reference/C/CONTRIB/SNIP/fpswitch.c
new file mode 100755
index 0000000..6645754
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/fpswitch.c
@@ -0,0 +1,81 @@
+/*
+**  FPSELECT.C - Demonstrates using function pointers in lieu of switches
+*/
+
+#include <stdlib.h>     /* for NULL */
+
+/*  Declare your functions here     */
+
+char *cpfunc1(int);
+char *cpfunc2(int);
+char *cpfunc3(int);
+
+void vfunc1(void);
+void vfunc2(void);
+void vfunc3(void);
+void vfunc4(void);
+
+/*
+**  Old ways using switch statements
+*/
+
+char *oldcpswitch(int select, int arg)
+{
+      switch (select)
+      {
+      case 1:
+            return cpfunc1(arg);
+      
+      case 2:
+            return cpfunc2(arg);
+      
+      case 3:
+            return cpfunc3(arg);
+            
+      default:
+            return NULL;
+      }
+}
+
+void oldvswitch(int select)
+{
+      switch (select)
+      {
+      case 1:
+            vfunc1();
+            break;
+      
+      case 2:
+            vfunc2();
+            break;
+      
+      case 3:
+            vfunc3();
+            break;
+      
+      case 4:
+            vfunc4();
+            break;
+      }
+}
+
+/*
+**  Using function pointers
+*/
+
+char *newcpswitch(int select, int arg)
+{
+      char *(*cpfunc[3])(int) = { cpfunc1, cpfunc2, cpfunc3 };
+
+      if (select < 1 || select > 3)
+            return NULL;
+      return (*cpfunc[select-1])(arg);
+}
+
+void newvswitch(int select)
+{
+      void (*vfunc[4])(void) = { vfunc1, vfunc2, vfunc3, vfunc4 };
+
+      if (select > 0 && select < 5)
+            (*vfunc[select-1])();
+}
-- 
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