X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;f=roguelike.c;h=c68e983705466eac6a3f920127070b3ca51486bb;hb=9f43e263fd48bf840d3b6225bf3367752a5575b5;hp=7abc32337e876e671993e29c6924c3b0db29f218;hpb=0d03343c9e13078b01ec8da1d7266b9e2ac39faf;p=plomrogue

diff --git a/roguelike.c b/roguelike.c
index 7abc323..c68e983 100644
--- a/roguelike.c
+++ b/roguelike.c
@@ -1,5 +1,5 @@
 #include <stdlib.h>
-//#include <limits.h>
+#include <limits.h>
 #include <stdint.h>
 #include <ncurses.h>
 #include <string.h>
@@ -12,37 +12,68 @@
 
 uint16_t rrand(char use_seed, uint32_t new_seed) {
 // Pseudo-random number generator (LGC algorithm). Use instead of rand() to ensure portable predictability.
-  static uint32_t seed = 0;
+  static uint32_t seed;
   if (0 != use_seed)
     seed = new_seed;
   seed = ((seed * 1103515245) + 12345) % 2147483648;   // Values as recommended by POSIX.1-2001 (see rand(3)).
   return (seed / 65536); }                         // Ignore least significant 16 bits (they are less random).
 
-uint32_t load_seed() {
-// Load seed integer from seed file.
-  uint32_t seed;
-  const uint16_t nchar = 256;
-  FILE * file = fopen("seed", "r");
+uint16_t read_uint16_bigendian(FILE * file) {
+// Read uint16 from file in big-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
+  unsigned char a = fgetc(file);
+  unsigned char b = fgetc(file);
+  return (a * nchar) + b; }
+
+void write_uint16_bigendian(uint16_t x, FILE * file) {
+// Write uint16 to file in beg-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
+  unsigned char a = x / nchar;
+  unsigned char b = x % nchar;
+  fputc(a, file);
+  fputc(b, file); }
+
+uint32_t read_uint32_bigendian(FILE * file) {
+// Read uint32 from file in big-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
   unsigned char a = fgetc(file);
   unsigned char b = fgetc(file);
   unsigned char c = fgetc(file);
   unsigned char d = fgetc(file);
-  seed = (a * nchar * nchar * nchar) + (b * nchar * nchar) + (c * nchar) + d;
-  fclose(file);
-  return seed; }
+  return (a * nchar * nchar * nchar) + (b * nchar * nchar) + (c * nchar) + d; }
 
-void save_seed(uint32_t seed) {
-// Save seed integer to seed file.
-  const uint16_t nchar = 256;
-  unsigned char a = seed / (nchar * nchar * nchar);
-  unsigned char b = (seed - (a * nchar * nchar * nchar)) / (nchar * nchar);
-  unsigned char c = (seed - ((a * nchar * nchar * nchar) + (b * nchar * nchar))) / nchar;
-  unsigned char d = seed % nchar;
-  FILE * file = fopen("seed", "w");
+void write_uint32_bigendian(uint32_t x, FILE * file) {
+// Write uint32 to file in beg-endian order.
+  const uint16_t nchar = UCHAR_MAX + 1;
+  unsigned char a = x / (nchar * nchar * nchar);
+  unsigned char b = (x - (a * nchar * nchar * nchar)) / (nchar * nchar);
+  unsigned char c = (x - ((a * nchar * nchar * nchar) + (b * nchar * nchar))) / nchar;
+  unsigned char d = x % nchar;
   fputc(a, file);
   fputc(b, file);
   fputc(c, file);
-  fputc(d, file);
+  fputc(d, file); }
+
+void load_seed(struct World * world) {
+// Load seed integer from seed file.
+  FILE * file = fopen("savefile", "r");
+  world->seed = read_uint32_bigendian(file);
+  world->turn = read_uint32_bigendian(file);
+  world->player->y = read_uint16_bigendian(file);
+  world->player->x = read_uint16_bigendian(file);
+  world->monster->y = read_uint16_bigendian(file);
+  world->monster->x = read_uint16_bigendian(file);
+  fclose(file); }
+
+void save_seed(struct World * world) {
+// Save seed integer to seed file.
+  FILE * file = fopen("savefile", "w");
+  write_uint32_bigendian(world->seed, file);
+  write_uint32_bigendian(world->turn, file);
+  write_uint16_bigendian(world->player->y, file);
+  write_uint16_bigendian(world->player->x, file);
+  write_uint16_bigendian(world->monster->y, file);
+  write_uint16_bigendian(world->monster->x, file);
   fclose(file); }
 
 void toggle_window (struct WinMeta * win_meta, struct Win * win) {
@@ -67,12 +98,11 @@ void growshrink_active_window (struct WinMeta * win_meta, char change) {
       width++;
     resize_active_window (win_meta, height, width); } }
 
-struct Map init_map (uint32_t seed) {
+struct Map init_map () {
 // Initialize map with some experimental start values.
-  rrand(1, seed);
   struct Map map;
-  map.width = 96;
-  map.height = 32;
+  map.width = 64;
+  map.height = 64;
   map.offset_x = 0;
   map.offset_y = 0;
   map.cells = malloc(map.width * map.height);
@@ -104,9 +134,10 @@ void map_scroll (struct Map * map, char dir) {
 void next_turn (struct World * world) {
 // Increment turn and move enemy.
   world->turn++;
+  rrand(1, world->seed * world->turn);
   char d = rrand(0, 0) % 5;
-  char ty = world->monster->y;
-  char tx = world->monster->x;
+  uint16_t ty = world->monster->y;
+  uint16_t tx = world->monster->x;
   if (1 == d)
     ty++;
   else if (2 == d)
@@ -146,8 +177,8 @@ void move_player (struct World * world, char d) {
   static char prev = 0;
   char success = 0;
   char * dir;
-  char ty = world->player->y;
-  char tx = world->player->x;
+  uint16_t ty = world->player->y;
+  uint16_t tx = world->player->x;
   if ('s' == d) {
     dir = "south";
     ty++; }
@@ -188,31 +219,27 @@ void player_wait (struct World * world) {
   update_log (world, "\nYou wait."); }
 
 int main (int argc, char *argv[]) {
-  uint32_t seed = time(NULL);
-  int opt;
-  while ((opt = getopt(argc, argv, "l")) != -1) {
-    switch (opt) {
-      case 'l':
-	seed = load_seed();
-        break;
-      default:
-        exit(EXIT_FAILURE); } }
-
   struct World world;
-  init_keybindings(&world);
-  world.turn = 0;
-  world.log = calloc(1, sizeof(char));
-  update_log (&world, "Start!");
-  struct Map map = init_map(seed);
-  world.map = &map;
   struct Player player;
-  player.y = 16;
-  player.x = 16;
   world.player = &player;
   struct Monster monster;
-  monster.y = 16;
-  monster.x = 80;
   world.monster = &monster;
+  if (0 == access("savefile", F_OK))
+    load_seed(&world);
+  else {
+    player.y = 8;
+    player.x = 8;
+    monster.y = 55;
+    monster.x = 55;
+    world.seed = time(NULL);
+    world.turn = 1; }
+  rrand(1, world.seed);
+
+  init_keybindings(&world);
+  world.log = calloc(1, sizeof(char));
+  update_log (&world, "Start!");
+  struct Map map = init_map();
+  world.map = &map;
 
   WINDOW * screen = initscr();
   noecho();
@@ -226,7 +253,11 @@ int main (int argc, char *argv[]) {
   struct Win win_log = init_window(&win_meta, "Log", &world, draw_log_win);
 
   int key;
+  uint32_t last_turn = 0;
   while (1) {
+    if (last_turn != world.turn) {
+      save_seed(&world);
+      last_turn = world.turn; }
     draw_all_windows (&win_meta);
     key = getch();
     if      (key == get_action_key(world.keybindings, "quit"))
@@ -267,8 +298,6 @@ int main (int argc, char *argv[]) {
       keyswin_move_selection (&world, 'd');
     else if (key == get_action_key(world.keybindings, "keys mod"))
       keyswin_mod_key (&world, &win_meta);
-    else if (key == get_action_key(world.keybindings, "save seed"))
-      save_seed(seed);
     else if (key == get_action_key(world.keybindings, "map up"))
       map_scroll (&map, 'n');
     else if (key == get_action_key(world.keybindings, "map down"))