add ctl_free function

2 files changed, 11 insertions, 3 deletions

diff --git a/include/utility.h b/include/utility.h
index 2e4330d..f51a646 100644
--- a/include/utility.h
+++ b/include/utility.h
@@ -33,6 +33,7 @@
 /*  Functions:                                            */
 /*     ctl_malloc   like malloc(), but will exit on error */
 /*     ctl_realloc  like realloc(), but will exit on erro */
+/*     ctl_free     like free(), but will return NULL     */
 /*     ctl_die      print some message and exit()         */
 /*     ctl_swap     swap two elements with given type     */
 /*                                                        */
@@ -43,11 +44,11 @@ typedef enum{
 } ErrorType;
 
 //                         int 
-typedef         *int      pint;
+typedef          int*     pint;
 typedef unsigned int      uint;
 typedef         uint*    puint;
 typedef    const int      cint;
-typedef        *cint     pcint;
+typedef         cint*    pcint;
 typedef   const uint     cuint;
 typedef        cuint*   pcuint;
 #define    Int(X) ((   int)(X))
@@ -98,7 +99,8 @@ typedef       pcuchar* ppcuchar;
 #define ppcuChar(X) ((ppcuchar)(X))
 
 pvoid ctl_malloc (size_t size);
-pvoid ctl_realloc(pvoid *ptr, size_t size);
+pvoid ctl_realloc(pvoid ptr, size_t size);
+pvoid ctl_free   (pvoid ptr);
 void  ctl_die    (ErrorType e);
 
 #define ctl_swap(X,Y,Z) do{X zzzztmp=(Y);(Y)=(Z);(Z)=zzzztmp;}while(0)
diff --git a/src/utility.c b/src/utility.c
index bcc2500..7287908 100644
--- a/src/utility.c
+++ b/src/utility.c
@@ -22,6 +22,12 @@ pvoid ctl_realloc(pvoid ptr, size_t size){
     return ptr;
 }
 
+/*********** like free(), but will return NULL ************/
+pvoid ctl_free(pvoid ptr){
+    free(ptr);
+    return NULL;
+}
+
 /********* print some message on STDERR and exit() ********/
 void ctl_die(ErrorType e){
     fprintf(stderr, "exit(%d): ", (int)e);