implemented some Z80 and randseeding

c/scoundrel.c

@@ -8,10 +8,35 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#ifndef __CC65__
+#if defined(__CC65__) || defined(__Z80__)
+#define RETRO_IMPL
+#endif
+#ifndef RETRO_IMPL
 #include <time.h>
 #endif
 
+char scanchar() {
+  char c;
+  scanf(" %c", &c);
+  return c;
+}
+
+#ifdef RETRO_IMPL
+void randomize() {
+  int seed = 0, i, x, n = 6;
+  printf("\nType %d characters: ", n);
+  for(i=0;i<n;i++) {
+    x = (int) scanchar();
+    x ^= x << 7;
+    x ^= x >> 9;
+    x ^= x << 8;
+    seed ^= x;
+  }
+  srand(seed);
+  printf("\n");
+}
+#endif
+
 /* UI choices */
 #define CH1 0
 #define CH2 1
@@ -51,7 +76,7 @@ void print_msg(char *s) {
 char get_choice() {
   char c, res;
   printf("Your choice: ");
-  scanf(" %c", &c);
+  c = scanchar();
   switch(c) {
     case 'a':
     case 'A':
@@ -88,8 +113,7 @@ char get_choice() {
 int confirm(char *prompt) {
   char c, d;
   printf("%s", prompt);
-  c = getchar();
-  scanf(" %c", &c);
+  c = scanchar();
   if(c == 'y' || c == 'Y') d = 1;
   else d = 0;
   printf("\n");
@@ -322,8 +346,8 @@ int game() {
 /* Entry point */
 int main() {
   int score;
-#ifdef __CC65__
-  _randomize();
+#ifdef RETRO_IMPL
+  randomize();
 #else
   srand(time(NULL));
 #endif