Added hexdump.c

C/hexdump/hexdump.c

@@ -0,0 +1,20 @@
+#include <ctype.h>
+#include <stdio.h>
+
+void hexdump(void *ptr, int buflen) {
+  unsigned char *buf = (unsigned char*)ptr;
+  int i, j;
+  for (i=0; i<buflen; i+=16) {
+    printf("%06x: ", i);
+    for (j=0; j<16; j++) 
+      if (i+j < buflen)
+        printf("%02x ", buf[i+j]);
+      else
+        printf("   ");
+    printf(" ");
+    for (j=0; j<16; j++) 
+      if (i+j < buflen)
+        printf("%c", isprint(buf[i+j]) ? buf[i+j] : '.');
+    printf("\n");
+  }
+}