a3: memdump fast funktionstüchtig

src/c/a3.c

@@ -5,35 +5,38 @@
 #include <memory.h>
 
 void memdump(unsigned char *string) {
-    int i;
-    unsigned char buffer[64];
-
     printf("ADDR    00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F  0123456789ABCDEF\n");
-    for(i = 0; i <= 64; i++) {
+
-        string++;
+    int lineLength = 16;
-        if((i % 16) == 0) {
+    char array[lineLength * 4];
-            if(i != 0) printf("  %s\n", string);
+
-            printf("0x%04x ", *string);
+
-            buffer[i] = string[i];
+    for(int i = 0; i <= 3; i++) {
+        //FIXME: address seems wrong
+        printf("0x%02x    ", string[i]);
+        for (int j = i * lineLength; j < (i + 1) * lineLength; j++) {
+            printf("%02x ", string[j]);
+            if(string[j] < 0x20 || string[j] > 0x7e) array[j] = '.';
+            else array[j] = string[j];
         }
-        printf(" %02x", string[i]);
+        printf(" ");
-        /*if ((string[i] < 0x20) || (string[i] > 0x7e))
-            buffer[i] = '.';
-        else
-            buffer[i] = string[i];*/
 
-        buffer[(i % 16) + 1] = '\0';
+        for (int j = i * lineLength; j < (i + 1) * lineLength; j++) {
+            printf("%c", array[j]);
+
+        }
+
+        printf("\n");
 
 
     }
-    while ((i % 16) != 0) {
+
-        printf("   ");
+
-        i++;
-    }
 }
 
 
 int memreplace(char *string, char cin, char cout, char **caddr) {
+    //memctl
     return 42;
 }
 
@@ -43,10 +46,17 @@ int main(int argc, char **argv) {
         return -1;
     }
 
+    size_t size = 4 * 16;
+    unsigned char *buffer = malloc(size);
+    if(buffer == NULL) return -1;
 
-    memdump((unsigned char*)*argv);
+
-    char **lastAddress;
+
-    int count = memreplace(argv[1], *argv[2], *argv[3], 0);
+
+    memdump(buffer);
+
+    char **lastAddress = NULL;
+    int count = memreplace(argv[1], *argv[2], *argv[3], lastAddress);
 
     printf("Laenge der Zeichenkette (inkl \\0): %i Bytes\n", (int) strlen(argv[1]));
     printf("Ersetzen: '%c' mit '%c'\n", *argv[2], *argv[3]);
@@ -54,7 +64,7 @@ int main(int argc, char **argv) {
     printf("zuletzt an Addresse 0x%lx \n", (unsigned long) (&lastAddress));
     memdump((unsigned char*)argv[1]);
 
-    free(argv);
+    free(buffer);
 
     return 0;
 }