From: Christian Heller Date: Tue, 28 May 2013 03:43:14 +0000 (+0200) Subject: Don't save and load maps, save and load seeds of maps. Load via command line option. X-Git-Tag: tce~1273 X-Git-Url: https://plomlompom.com/repos/%7B%7B%20web_path%20%7D%7D/decks/%7B%7Bprefix%7D%7D/%7B%7Bdb.prefix%7D%7D/bar%20baz.html?a=commitdiff_plain;h=0d03343c9e13078b01ec8da1d7266b9e2ac39faf;p=plomrogue Don't save and load maps, save and load seeds of maps. Load via command line option. --- diff --git a/keybindings b/keybindings index 9b0f2a1..6d0b52e 100644 --- a/keybindings +++ b/keybindings @@ -17,8 +17,7 @@ 95 shrink horizontally 43 grow vertically 45 shrink vertically -108 load map -115 save map +115 save seed 119 map up 120 map down 97 map left diff --git a/map b/map deleted file mode 100644 index 8fc90f7..0000000 Binary files a/map and /dev/null differ diff --git a/roguelike.c b/roguelike.c index 2952daf..7abc323 100644 --- a/roguelike.c +++ b/roguelike.c @@ -1,19 +1,50 @@ #include -#include +//#include #include #include #include +#include +#include #include "windows.h" #include "draw_wins.h" #include "roguelike.h" #include "keybindings.h" -uint16_t rrand() { +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; + 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"); + 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; } + +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"); + fputc(a, file); + fputc(b, file); + fputc(c, file); + fputc(d, file); + fclose(file); } + void toggle_window (struct WinMeta * win_meta, struct Win * win) { // Toggle display of window win. if (0 != win->curses) @@ -36,8 +67,9 @@ void growshrink_active_window (struct WinMeta * win_meta, char change) { width++; resize_active_window (win_meta, height, width); } } -struct Map init_map () { +struct Map init_map (uint32_t seed) { // Initialize map with some experimental start values. + rrand(1, seed); struct Map map; map.width = 96; map.height = 32; @@ -49,7 +81,7 @@ struct Map init_map () { for (y = 0; y < map.height; y++) for (x = 0; x < map.width; x++) { terrain = '.'; - ran = rrand(); + 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) @@ -72,7 +104,7 @@ void map_scroll (struct Map * map, char dir) { void next_turn (struct World * world) { // Increment turn and move enemy. world->turn++; - char d = rrand() % 5; + char d = rrand(0, 0) % 5; char ty = world->monster->y; char tx = world->monster->x; if (1 == d) @@ -155,47 +187,23 @@ void player_wait (struct World * world) { next_turn (world); update_log (world, "\nYou wait."); } -void save_map (struct Map * map) { -// Save map to file "map". - FILE * file = fopen("map", "w"); - fputc(map->width / CHAR_MAX, file); - fputc(map->width % CHAR_MAX, file); - uint16_t y, x; - for (y = 0; y < map->height; y++) - for (x = 0; x < map->width; x++) - fputc(map->cells[y * map->width + x], file); - fclose(file); } - -struct Map load_map () { -// Load map from file. - FILE * file = fopen("map", "r"); - struct Map map; - map.width = (fgetc(file) * CHAR_MAX) + fgetc(file); - long pos = ftell(file); - int c = fgetc(file); - uint32_t i = 0; - while (EOF != c) { - i++; - c = fgetc(file); } - map.cells = malloc(i * sizeof(char)); - map.height = i / map.width; - fseek(file, pos, SEEK_SET); - c = fgetc(file); - i = 0; - while (EOF != c) { - map.cells[i] = (char) c; - c = fgetc(file); - i++; } - fclose(file); - return map; } +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); } } -int main () { struct World world; init_keybindings(&world); world.turn = 0; world.log = calloc(1, sizeof(char)); update_log (&world, "Start!"); - struct Map map = init_map(); + struct Map map = init_map(seed); world.map = ↦ struct Player player; player.y = 16; @@ -259,10 +267,8 @@ int main () { 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, "load map")) - map = load_map(); - else if (key == get_action_key(world.keybindings, "save map")) - save_map(&map); + 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")) diff --git a/roguelike.h b/roguelike.h index 650ddc1..7bbe5c3 100644 --- a/roguelike.h +++ b/roguelike.h @@ -22,10 +22,12 @@ struct Monster { uint16_t y; uint16_t x; }; -uint16_t rrand(); +uint16_t rrand(char, uint32_t); +uint32_t load_seed(); +void save_seed(uint32_t); void toggle_window (struct WinMeta *, struct Win *); void growshrink_active_window (struct WinMeta *, char); -struct Map init_map (); +struct Map init_map (uint32_t); void map_scroll (struct Map *, char); void next_turn (struct World *); void update_log (struct World *, char *); diff --git a/seed b/seed new file mode 100644 index 0000000..717e474 --- /dev/null +++ b/seed @@ -0,0 +1 @@ +Q¤' \ No newline at end of file