X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=roguelike.c;h=23a686a468ec8e4dc0ad357cfdf66b258451a9c4;hb=cc54db8c41c3d0e00248422b6dc1a67187cd4e16;hp=20181befccf6b2de2c62d2a74091c4463cd50e2e;hpb=122747fbbdc061942de2fc2bca901a44a6b4ab61;p=plomrogue

diff --git a/roguelike.c b/roguelike.c
index 20181be..23a686a 100644
--- a/roguelike.c
+++ b/roguelike.c
@@ -1,11 +1,81 @@
+#include <stdlib.h>
+#include <limits.h>
+#include <stdint.h>
 #include <ncurses.h>
 #include <string.h>
-#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
 #include "windows.h"
 #include "draw_wins.h"
 #include "roguelike.h"
 #include "keybindings.h"
 
+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;
+  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).
+
+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);
+  return (a * nchar * nchar * nchar) + (b * nchar * nchar) + (c * nchar) + d; }
+
+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); }
+
+void load_game(struct World * world) {
+// Load game data from game 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_game(struct World * world) {
+// Save game data to game 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) {
 // Toggle display of window win.
   if (0 != win->curses)
@@ -16,8 +86,8 @@ void toggle_window (struct WinMeta * win_meta, struct Win * win) {
 void growshrink_active_window (struct WinMeta * win_meta, char change) {
 // Grow or shrink active window horizontally or vertically by one cell size.
   if (0 != win_meta->active) {
-    int height = win_meta->active->height;
-    int width = win_meta->active->width;
+    uint16_t height = win_meta->active->height;
+    uint16_t width = win_meta->active->width;
     if      (change == '-')
       height--;
     else if (change == '+')
@@ -31,17 +101,17 @@ void growshrink_active_window (struct WinMeta * win_meta, char change) {
 struct Map init_map () {
 // Initialize map with some experimental start values.
   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);
-  int x, y, ran;
+  uint16_t x, y, ran;
   char terrain;
   for (y = 0; y < map.height; y++)
     for (x = 0; x < map.width; x++) {
       terrain = '.';
-      ran = rand();
+      ran = rrand(0, 0);
       if (   0 == ran % ((x*x) / 3 + 1)
           || 0 == ran % ((y*y) / 3 + 1)
           || 0 == ran % ((map.width - x - 1) * (map.width - x - 1) / 3 + 1)
@@ -64,9 +134,10 @@ void map_scroll (struct Map * map, char dir) {
 void next_turn (struct World * world) {
 // Increment turn and move enemy.
   world->turn++;
-  char d = rand() % 5;
-  char ty = world->monster->y;
-  char tx = world->monster->x;
+  rrand(1, world->seed * world->turn);
+  char d = rrand(0, 0) % 5;
+  uint16_t ty = world->monster->y;
+  uint16_t tx = world->monster->x;
   if (1 == d)
     ty++;
   else if (2 == d)
@@ -84,16 +155,16 @@ void next_turn (struct World * world) {
 void update_log (struct World * world, char * text) {
 // Update log with new text to be appended.
   char * new_text;
-  int len_old = strlen(world->log);
-  int len_new = strlen(text);
-  int len_whole = len_old + len_new + 1;
+  uint16_t len_old = strlen(world->log);
+  uint16_t len_new = strlen(text);
+  uint16_t len_whole = len_old + len_new + 1;
   new_text = calloc(len_whole, sizeof(char));
   memcpy(new_text, world->log, len_old);
   memcpy(new_text + len_old, text, len_new);
   free(world->log);
   world->log = new_text; }
 
-char is_passable (struct World * world, int x, int y) {
+char is_passable (struct World * world, uint16_t x, uint16_t y) {
 // Check if coordinate on (or beyond) map is accessible to movement.
   char passable = 0;
   if (0 <= x && x < world->map->width && 0 <= y && y < world->map->height)
@@ -101,13 +172,19 @@ char is_passable (struct World * world, int x, int y) {
       passable = 1;
   return passable; }
 
+void record_action (char action) {
+//
+  FILE * file = fopen("record", "a");
+  fputc(action, file);
+  fclose(file); }
+
 void move_player (struct World * world, char d) {
 // Move player in direction d, increment turn counter and update log.
   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++; }
@@ -140,29 +217,113 @@ void move_player (struct World * world, char d) {
       update_log (world, msg);
       free(msg); } }
   prev = success * d;
+  if (1 == world->interactive)
+    record_action(d);
   next_turn (world); }
 
-void player_wait(struct World * world) {
+void player_wait (struct World * world) {
 // Make player wait one turn.
+  if (1 == world->interactive)
+    record_action(0);
   next_turn (world);
   update_log (world, "\nYou wait."); }
 
-int main () {
+void startpos(struct World * world) {
+// Initialize some default starting values.
+  world->turn = 1;
+  world->player->y = 8;
+  world->player->x = 8;
+  world->monster->y = 55;
+  world->monster->x = 55; }
+
+unsigned char meta_keys(int key, struct World * world, struct WinMeta * win_meta, struct Win * win_keys,
+                        struct Win * win_map, struct Win * win_info, struct Win * win_log) {
+// Call some meta program / window management actions dependent on key. Return 1 to signal quitting.
+  if (key == get_action_key(world->keybindings, "quit"))
+    return 1;
+  if (key == get_action_key(world->keybindings, "scroll pad right"))
+    scroll_pad (win_meta, '+');
+  else if (key == get_action_key(world->keybindings, "scroll pad left"))
+    scroll_pad (win_meta, '-');
+  else if (key == get_action_key(world->keybindings, "toggle keys window"))
+    toggle_window(win_meta, win_keys);
+  else if (key == get_action_key(world->keybindings, "toggle map window"))
+    toggle_window(win_meta, win_map);
+  else if (key == get_action_key(world->keybindings, "toggle info window"))
+    toggle_window(win_meta, win_info);
+  else if (key == get_action_key(world->keybindings, "toggle log window"))
+    toggle_window(win_meta, win_log);
+  else if (key == get_action_key(world->keybindings, "cycle forwards"))
+    cycle_active_window(win_meta, 'n');
+  else if (key == get_action_key(world->keybindings, "cycle backwards"))
+    cycle_active_window(win_meta, 'p');
+  else if (key == get_action_key(world->keybindings, "shift forwards"))
+    shift_active_window(win_meta, 'f');
+  else if (key == get_action_key(world->keybindings, "shift backwards"))
+    shift_active_window(win_meta, 'b');
+  else if (key == get_action_key(world->keybindings, "grow horizontally"))
+    growshrink_active_window(win_meta, '*');
+  else if (key == get_action_key(world->keybindings, "shrink horizontally"))
+    growshrink_active_window(win_meta, '_');
+  else if (key == get_action_key(world->keybindings, "grow vertically"))
+    growshrink_active_window(win_meta, '+');
+  else if (key == get_action_key(world->keybindings, "shrink vertically"))
+    growshrink_active_window(win_meta, '-');
+  else if (key == get_action_key(world->keybindings, "save keys"))
+    save_keybindings(world);
+  else if (key == get_action_key(world->keybindings, "keys nav up"))
+    keyswin_move_selection (world, 'u');
+  else if (key == get_action_key(world->keybindings, "keys nav down"))
+    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, "map up"))
+    map_scroll (world->map, 'n');
+  else if (key == get_action_key(world->keybindings, "map down"))
+    map_scroll (world->map, 's');
+  else if (key == get_action_key(world->keybindings, "map right"))
+    map_scroll (world->map, 'e');
+  else if (key == get_action_key(world->keybindings, "map left"))
+    map_scroll (world->map, 'w');
+  return 0; }
+
+int main (int argc, char *argv[]) {
   struct World world;
+  world.interactive = 1;
+  int opt;
+  while ((opt = getopt(argc, argv, "s")) != -1) {
+    switch (opt) {
+      case 's':
+        world.interactive = 0;
+        break;
+      default:
+        exit(EXIT_FAILURE); } }
+
   init_keybindings(&world);
-  world.turn = 0;
   world.log = calloc(1, sizeof(char));
-  update_log (&world, "Start!");
-  struct Map map = init_map();
-  world.map = &map;
+  update_log (&world, " ");
   struct Player player;
-  player.y = 16;
-  player.x = 16;
   world.player = &player;
   struct Monster monster;
-  monster.y = 16;
-  monster.x = 80;
   world.monster = &monster;
+  FILE * file;
+
+  if (0 == world.interactive) {
+    startpos(&world);
+    file = fopen("record", "r");
+    world.seed = read_uint32_bigendian(file); }
+  else {
+    if (0 == access("savefile", F_OK))
+      load_game(&world);
+    else {
+      startpos(&world);
+      world.seed = time(NULL);
+      file = fopen("record", "w");
+      write_uint32_bigendian(world.seed, file);
+      fclose(file); } }
+  rrand(1, world.seed);
+  struct Map map = init_map();
+  world.map = &map;
 
   WINDOW * screen = initscr();
   noecho();
@@ -174,67 +335,62 @@ int main () {
   struct Win win_map = init_window(&win_meta, "Map", &world, draw_map_win);
   struct Win win_info = init_window(&win_meta, "Info", &world, draw_info_win);
   struct Win win_log = init_window(&win_meta, "Log", &world, draw_log_win);
+  win_keys.width = 29;
+  win_map.width = win_meta.width - win_keys.width - win_log.width - 2;
+  win_info.height = 1;
+  win_log.height = win_meta.height - 3;
+  toggle_window(&win_meta, &win_keys);
+  toggle_window(&win_meta, &win_map);
+  toggle_window(&win_meta, &win_info);
+  toggle_window(&win_meta, &win_log);
 
   int key;
-  while (1) {
-    draw_all_windows (&win_meta);
-    key = getch();
-    if      (key == get_action_key(world.keybindings, "quit"))
-      break;
-    else if (key == get_action_key(world.keybindings, "scroll pad right"))
-      scroll_pad (&win_meta, '+');
-    else if (key == get_action_key(world.keybindings, "scroll pad left"))
-      scroll_pad (&win_meta, '-');
-    else if (key == get_action_key(world.keybindings, "toggle keys window"))
-      toggle_window(&win_meta, &win_keys);
-    else if (key == get_action_key(world.keybindings, "toggle map window"))
-      toggle_window(&win_meta, &win_map);
-    else if (key == get_action_key(world.keybindings, "toggle info window"))
-      toggle_window(&win_meta, &win_info);
-    else if (key == get_action_key(world.keybindings, "toggle log window"))
-      toggle_window(&win_meta, &win_log);
-    else if (key == get_action_key(world.keybindings, "cycle forwards"))
-      cycle_active_window(&win_meta, 'n');
-    else if (key == get_action_key(world.keybindings, "cycle backwards"))
-      cycle_active_window(&win_meta, 'p');
-    else if (key == get_action_key(world.keybindings, "shift forwards"))
-      shift_active_window(&win_meta, 'f');
-    else if (key == get_action_key(world.keybindings, "shift backwards"))
-      shift_active_window(&win_meta, 'b');
-    else if (key == get_action_key(world.keybindings, "grow horizontally"))
-      growshrink_active_window(&win_meta, '*');
-    else if (key == get_action_key(world.keybindings, "shrink horizontally"))
-      growshrink_active_window(&win_meta, '_');
-    else if (key == get_action_key(world.keybindings, "grow vertically"))
-      growshrink_active_window(&win_meta, '+');
-    else if (key == get_action_key(world.keybindings, "shrink vertically"))
-      growshrink_active_window(&win_meta, '-');
-    else if (key == get_action_key(world.keybindings, "save keys"))
-      save_keybindings(&world);
-    else if (key == get_action_key(world.keybindings, "keys nav up"))
-      keyswin_move_selection (&world, 'u');
-    else if (key == get_action_key(world.keybindings, "keys nav down"))
-      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, "map up"))
-      map_scroll (&map, 'n');
-    else if (key == get_action_key(world.keybindings, "map down"))
-      map_scroll (&map, 's');
-    else if (key == get_action_key(world.keybindings, "map right"))
-      map_scroll (&map, 'e');
-    else if (key == get_action_key(world.keybindings, "map left"))
-      map_scroll (&map, 'w');
-    else if (key == get_action_key(world.keybindings, "player down"))
-      move_player(&world, 's');
-    else if (key == get_action_key(world.keybindings, "player up"))
-      move_player(&world, 'n');
-    else if (key == get_action_key(world.keybindings, "player right"))
-      move_player(&world, 'e');
-    else if (key == get_action_key(world.keybindings, "player left"))
-      move_player(&world, 'w');
-    else if (key == get_action_key(world.keybindings, "wait") )
-      player_wait (&world); }
+  unsigned char result;
+  if (0 == world.interactive) {
+    int action;
+    while (1) {
+      draw_all_windows (&win_meta);
+      key = getch();
+      if (key == get_action_key(world.keybindings, "wait / next turn") ) {
+        action = getc(file);
+        if (EOF == action)
+          break;
+        else if (0 == action)
+          player_wait (&world);
+        else if ('s' == action)
+          move_player(&world, 's');
+        else if ('n' == action)
+          move_player(&world, 'n');
+        else if ('e' == action)
+          move_player(&world, 'e');
+        else if ('w' == action)
+          move_player(&world, 'w'); }
+      else
+        result = meta_keys(key, &world, &win_meta, &win_keys, &win_map, &win_info, &win_log);
+        if (1 == result)
+          break; } }
+  else {
+    uint32_t last_turn = 0;
+    while (1) {
+      if (last_turn != world.turn) {
+        save_game(&world);
+        last_turn = world.turn; }
+      draw_all_windows (&win_meta);
+      key = getch();
+      if      (key == get_action_key(world.keybindings, "player down"))
+        move_player(&world, 's');
+      else if (key == get_action_key(world.keybindings, "player up"))
+        move_player(&world, 'n');
+      else if (key == get_action_key(world.keybindings, "player right"))
+        move_player(&world, 'e');
+      else if (key == get_action_key(world.keybindings, "player left"))
+        move_player(&world, 'w');
+      else if (key == get_action_key(world.keybindings, "wait / next turn"))
+        player_wait (&world);
+      else
+        result = meta_keys(key, &world, &win_meta, &win_keys, &win_map, &win_info, &win_log);
+        if (1 == result)
+          break; } }
 
   free(map.cells);
   for (key = 0; key <= world.keyswindata->max; key++)