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#include <stdbool.h> // bool
#include <string.h> // atoi()
#include <stdlib.h> // EXIT_{FAILURE,SUCCESS}
#include <stdio.h>
#include "../libsok/sok.h"
#include "levels.h"
#include "action.h"
#define UNUSED(a) ((void) (a))
#define warn(fmt, ...) do { \
fprintf(stderr, "W: " fmt "\n", ##__VA_ARGS__); \
} while (0)
#define die(fmt, ...) do { \
fprintf(stderr, "ERROR: " fmt "\n", ##__VA_ARGS__); \
exit(EXIT_FAILURE); \
} while (0)
static char print_buf[(SOK_LEVEL_MAX_WIDTH + 1) * SOK_LEVEL_MAX_HEIGHT + 1];
static bool
draw_on_size(
const sok_ctx_t * const ctx,
const sok_pos_t size,
void * const data
) {
UNUSED(ctx);
UNUSED(data);
// fprintf(stderr, "size: x = %u, y = %u\n", size.x, size.y);
memset(print_buf, ' ', sizeof(print_buf));
print_buf[(size.x + 1) * size.y + 1] = '\0';
for (size_t i = 0; i < size.y; i++) {
print_buf[(i + 1) * (size.x + 1) - 1] = '\n';
}
return true;
}
static bool
draw_on_home(
const sok_ctx_t * const ctx,
const sok_pos_t pos,
const bool has_goal,
void * const data
) {
UNUSED(data);
print_buf[pos.y * (ctx->level.size.x + 1) + pos.x] = has_goal ? '+' : '@';
return true;
}
static bool
draw_on_wall(
const sok_ctx_t * const ctx,
const sok_pos_t pos,
void * const data
) {
// fprintf(stderr, "wall: x = %u, y = %u\n", pos.x, pos.y);
UNUSED(data);
print_buf[pos.y * (ctx->level.size.x + 1) + pos.x] = '#';
return true;
}
static bool
draw_on_goal(
const sok_ctx_t * const ctx,
const sok_pos_t pos,
const bool has_player,
const bool has_box,
void * const data
) {
UNUSED(data);
const char c = has_player ? '+' : (has_box ? '*' : '.');
print_buf[pos.y * (ctx->level.size.x + 1) + pos.x] = c;
return true;
}
static bool
draw_on_box(
const sok_ctx_t * const ctx,
const sok_pos_t pos,
const bool has_goal,
void * const data
) {
UNUSED(data);
print_buf[pos.y * (ctx->level.size.x + 1) + pos.x] = has_goal ? '*' : '$';
return true;
}
static sok_ctx_walk_cbs_t
DRAW_CBS = {
.on_size = draw_on_size,
.on_home = draw_on_home,
.on_wall = draw_on_wall,
.on_goal = draw_on_goal,
.on_box = draw_on_box,
};
static void
draw(
const sok_ctx_t * const ctx,
const size_t level_num,
const level_t * const level
) {
// fill print buffer
if (!sok_ctx_walk(ctx, &DRAW_CBS, NULL)) {
die("Couldn't print level");
}
// print title, level, and console
printf(
"%s: %s (#%zu)\n" // set name, level name, and level number
"%s\n" // level
"%zu%s> ", // console
level->pack, level->name, level_num,
print_buf,
ctx->num_moves, sok_ctx_is_done(ctx) ? " (won!)" : ""
);
}
static void
solve_on_error(
const char * const err
) {
die("Error solving level: %s", err);
}
static void
print_moves(
const sok_ctx_t * const ctx,
const size_t skip_moves
) {
printf("Solution (%zu moves): ", ctx->num_moves - skip_moves);
for (size_t i = skip_moves; i < ctx->num_moves; i++) {
if (ctx->moves[i].dir >= SOK_DIR_LAST) {
die("invalid move: %u", ctx->moves[i].dir);
}
fputs(SOK_DIR_TO_STR(ctx->moves[i].dir), stdout);
}
printf("\n");
}
int main(int argc, char *argv[]) {
size_t level_num = (argc > 1) ? atoi(argv[1]) : 0;
const level_t *level = levels_get_level(level_num);
// init context
sok_ctx_t ctx;
sok_ctx_init(&ctx, NULL);
if (!sok_ctx_set_level(&ctx, level->data)) {
die("Couldn't load level %zu", level_num);
}
bool done = false;
while (!done) {
// draw screen
draw(&ctx, level_num, level);
// read input, check for error
const action_t action = get_action();
switch (action.type) {
case ACTION_QUIT:
done = true;
break;
case ACTION_MOVE:
if (!sok_ctx_move(&ctx, (sok_dir_t) action.data)) {
warn("move %s failed", SOK_DIR_TO_STR((sok_dir_t) action.data));
}
break;
case ACTION_UNDO:
if (!sok_ctx_undo(&ctx)) {
warn("undo failed");
}
break;
case ACTION_NEXT:
if (sok_ctx_is_done(&ctx)) {
// advance level
level_num++;
level = levels_get_level(level_num);
// load next level
if (!sok_ctx_set_level(&ctx, level->data)) {
die("Couldn't load level %zu", level_num);
}
} else {
warn("cannot advance to next level");
}
break;
case ACTION_WARP:
level_num = action.data;
level = levels_get_level(level_num);
// load level
if (!sok_ctx_set_level(&ctx, level->data)) {
die("Couldn't load level %zu", level_num);
}
break;
case ACTION_SOLVE:
{
// get current number of moves
const size_t old_num_moves = ctx.num_moves;
if (sok_solve(&ctx, solve_on_error)) {
// found solution, print it
print_moves(&ctx, old_num_moves);
} else {
warn("Couldn't solve level");
}
}
break;
default:
// ignore
break;
}
}
// return success
return EXIT_SUCCESS;
}
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