improved structure layout generation

[repair.git] / Repair / RepairCompiler / structextract / common.c

diff --git a/Repair/RepairCompiler/structextract/common.c b/Repair/RepairCompiler/structextract/common.c
new file mode 100755 (executable)
index 0000000..a047e8b
--- /dev/null
+++ b/Repair/RepairCompiler/structextract/common.c
@@ -0,0 +1,58 @@
+#include<string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include "common.h"
+
+char * copystr(const char *buf) {
+  int i;
+  if (buf==NULL)
+    return NULL;
+  for(i=0;;i++)
+    if (buf[i]==0) {
+      char *ptr=(char*)malloc(i+1);
+      memcpy(ptr,buf,i+1);
+      return ptr;
+    }
+}
+
+
+unsigned int hashstring(char *strptr) {
+  unsigned int hashcode=0;
+  int *intptr=(int *) strptr;
+  if(intptr==NULL)
+    return 0;
+  while(1) {
+    int copy1=*intptr;
+    if((copy1&0xFF000000)&&
+       (copy1&0xFF0000)&&
+       (copy1&0xFF00)&&
+       (copy1&0xFF)) {
+      hashcode^=*intptr;
+      intptr++;
+    } else {
+      if (!copy1&0xFF000000)
+       hashcode^=copy1&0xFF000000;
+      else if (!copy1&0xFF0000)
+       hashcode^=copy1&0xFF0000;
+      else if (!copy1&0xFF00)
+       hashcode^=copy1&0xFF00;
+      else if (!copy1&0xFF)
+       hashcode^=copy1&0xFF;
+      return hashcode;
+    }
+  }
+}
+
+int equivalentstrings(char *str1, char *str2) {
+  if ((str1!=NULL)&&(str2!=NULL)) {
+    if (strcmp(str1,str2)!=0)
+      return 0;
+    else
+      return 1;
+  } else if ((str1==NULL)&&(str2==NULL))
+    return 1;
+  else return 0;
+}
+