s/libsok/core/g

1 files changed, 0 insertions, 636 deletions

diff --git a/src/libsok/sok-ctx.c b/src/libsok/sok-ctx.c
deleted file mode 100644
index e278af1..0000000
--- a/src/libsok/sok-ctx.c
+++ /dev/null
@@ -1,636 +0,0 @@
-#include <stdbool.h>
-#include <string.h> // memset()
-#include "sok.h"
-
-#define UNUSED(a) ((void) (a))
-
-#define VALID_POS(pos) ( \
-  (pos).x < SOK_LEVEL_MAX_WIDTH && \
-  (pos).y < SOK_LEVEL_MAX_HEIGHT \
-)
-
-#define POINTS_EQUAL(a, b) ( \
-  ((a).x == (b).x) && \
-  ((a).y == (b).y) \
-)
-
-static bool
-ctx_is_wall(
-  const sok_ctx_t * const ctx,
-  const sok_pos_t pos
-) {
-  return ctx->level.walls[pos.y * ctx->level.size.x + pos.x];
-}
-
-static void
-ctx_set_wall(
-  sok_ctx_t * const ctx,
-  const sok_pos_t pos
-) {
-  ctx->level.walls[pos.y * ctx->level.size.x + pos.x] = true;
-}
-
-static void
-ctx_clear_walls(
-  sok_ctx_t * const ctx
-) {
-  memset(ctx->level.walls, 0, SOK_LEVEL_MAX_WIDTH * SOK_LEVEL_MAX_HEIGHT);
-}
-
-static bool
-on_size(
-  const sok_level_parser_t * const parser,
-  const sok_pos_t pos
-) {
-  sok_ctx_t *ctx = (sok_ctx_t*) parser->user_data;
-
-  if (!VALID_POS(pos)) {
-    // size out of bounds
-    return false;
-  }
-
-  // save width and height
-  ctx->level.size = pos;
-
-  // return success
-  return true;
-}
-
-static bool
-on_home(
-  const sok_level_parser_t * const parser,
-  const sok_pos_t pos
-) {
-  sok_ctx_t *ctx = (sok_ctx_t*) parser->user_data;
-
-  if (!VALID_POS(pos)) {
-    // position out of bounds
-    return false;
-  }
-
-  // save start position
-  ctx->level.home = pos;
-
-  // return success
-  return true;
-}
-
-static bool
-on_wall(
-  const sok_level_parser_t * const parser,
-  const sok_pos_t pos
-) {
-  sok_ctx_t *ctx = (sok_ctx_t*) parser->user_data;
-
-  if (!VALID_POS(pos)) {
-    // position out of bounds
-    return false;
-  }
-
-  // save wall
-  ctx_set_wall(ctx, pos);
-
-  // return sucess
-  return true;
-}
-
-static bool
-on_goal(
-  const sok_level_parser_t * const parser,
-  const sok_pos_t pos
-) {
-  sok_ctx_t *ctx = (sok_ctx_t*) parser->user_data;
-
-  if (!VALID_POS(pos)) {
-    // position out of bounds
-    return false;
-  }
-
-  if (ctx->level.num_goals >= SOK_LEVEL_MAX_GOALS - 1) {
-    // too many goals
-    return false;
-  }
-
-  // save goal
-  ctx->level.goals[ctx->level.num_goals++] = pos;
-
-  // return sucess
-  return true;
-}
-
-static bool
-on_box(
-  const sok_level_parser_t * const parser,
-  const sok_pos_t pos
-) {
-  sok_ctx_t *ctx = (sok_ctx_t*) parser->user_data;
-
-  if (!VALID_POS(pos)) {
-    // position out of bounds
-    return false;
-  }
-
-  if (ctx->level.num_boxes >= SOK_LEVEL_MAX_BOXES - 1) {
-    // too many boxes
-    return false;
-  }
-
-  // save box
-  ctx->level.boxes[ctx->level.num_boxes++] = pos;
-
-  // return sucess
-  return true;
-}
-
-static bool
-on_junk(
-  const sok_level_parser_t * const parser,
-  const size_t ofs,
-  const char tile
-) {
-  UNUSED(parser);
-  UNUSED(ofs);
-  UNUSED(tile);
-
-  // TODO
-
-  // return sucess
-  return true;
-}
-
-static const sok_level_parser_cbs_t
-LEVEL_PARSER_CBS = {
-  .on_size = on_size,
-  .on_home = on_home,
-  .on_wall = on_wall,
-  .on_goal = on_goal,
-  .on_box  = on_box,
-  .on_junk = on_junk,
-};
-
-static size_t
-pos_find(
-  const sok_pos_t pos,
-  const sok_pos_t * const set,
-  const size_t len
-) {
-  for (size_t i = 0; i < len; i++) {
-    if (POINTS_EQUAL(pos, set[i])) {
-      return i;
-    }
-  }
-
-  return len;
-}
-
-static size_t
-sok_ctx_count_goals_left(
-  sok_ctx_t * const ctx
-) {
-  const size_t num_boxes = ctx->level.num_boxes;
-  size_t r = 0;
-
-  for (size_t i = 0; i < ctx->level.num_goals; i++) {
-    r += pos_find(
-      ctx->level.goals[i],
-      ctx->boxes,
-      num_boxes
-    ) < num_boxes ? 0 : 1;
-  }
-
-  return r;
-}
-
-/*
- * static bool
- * sok_ctx_has_corner_boxes(
- *   const sok_ctx_t * const ctx
- * ) {
- *   for (size_t i = 0; i < ctx->level.num_boxes; i++) {
- *     // right
- *     const bool r = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x + 1,
- *       .y = ctx->boxes[i].y,
- *     });
- *
- *     // top-right
- *     const bool tr = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x + 1,
- *       .y = ctx->boxes[i].y - 1,
- *     });
- *
- *     // top
- *     const bool t = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x,
- *       .y = ctx->boxes[i].y - 1,
- *     });
- *
- *     // top-left
- *     const bool tl = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x - 1,
- *       .y = ctx->boxes[i].y - 1,
- *     });
- *
- *     // left
- *     const bool l = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x - 1,
- *       .y = ctx->boxes[i].y,
- *     });
- *
- *     // bottom-left
- *     const bool bl = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x - 1,
- *       .y = ctx->boxes[i].y + 1,
- *     });
- *
- *     // bottom
- *     const bool b = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x,
- *       .y = ctx->boxes[i].y + 1,
- *     });
- *
- *     const bool br = ctx_is_wall(ctx, (sok_pos_t) {
- *       .x = ctx->boxes[i].x + 1,
- *       .y = ctx->boxes[i].y + 1,
- *     });
- *
- *     if (
- *       (r && tr && t) || // top-right
- *       (t && tl && l) || // top-left
- *       (l && bl && b) || // bottom-left
- *       (b && br && r)    // bottom-right
- *     ) {
- *       // return
- *       return true;
- *     }
- *   }
- *
- *   return false;
- * }
- */
-
-void
-sok_ctx_init(sok_ctx_t * const ctx, void *user_data) {
-  memset(ctx, 0, sizeof(sok_ctx_t));
-  ctx->user_data = user_data;
-}
-
-bool
-sok_ctx_set_level(
-  sok_ctx_t * const ctx,
-  const char * const str
-) {
-
-  // clear level
-  ctx->level.num_goals = 0;
-  ctx->level.num_boxes = 0;
-  ctx_clear_walls(ctx);
-
-  // parse level
-  sok_level_parser_t parser;
-  sok_level_parser_init(&parser, &LEVEL_PARSER_CBS, ctx);
-  if (!sok_level_parser_parse(&parser, str, strlen(str))) {
-    // return failure
-    return false;
-  }
-
-  // init moves, player, and boxes
-  ctx->num_moves = 0;
-  ctx->home = ctx->level.home;
-  memcpy(ctx->boxes, ctx->level.boxes, ctx->level.num_boxes * sizeof(sok_pos_t));
-
-  // count number of goals left and check whether there are
-  ctx->num_goals_left = sok_ctx_count_goals_left(ctx);
-  // ctx->is_lost = sok_ctx_is_lost(ctx);
-
-  // return success
-  return true;
-}
-
-static bool
-tile_is_floor(
-  const sok_ctx_t * const ctx,
-  const sok_pos_t pos
-) {
-  return (
-    (pos.x < SOK_LEVEL_MAX_WIDTH - 1) &&
-    (pos.y < SOK_LEVEL_MAX_HEIGHT - 1) &&
-    !ctx_is_wall(ctx, pos)
-  );
-}
-
-static bool
-tile_is_box(
-  const sok_ctx_t * const ctx,
-  const sok_pos_t pos
-) {
-  const size_t num_boxes = ctx->level.num_boxes;
-  return pos_find(pos, ctx->boxes, num_boxes) < num_boxes;
-}
-
-static bool
-tile_is_goal(
-  const sok_ctx_t * const ctx,
-  const sok_pos_t pos
-) {
-  const size_t num_goals = ctx->level.num_goals;
-  return pos_find(pos, ctx->level.goals, num_goals) < num_goals;
-}
-
-static bool
-sok_ctx_push_move(
-  sok_ctx_t * const ctx,
-  const sok_dir_t dir,
-  const bool is_push
-) {
-  if (ctx->num_moves >= SOK_CTX_MAX_MOVES - 1) {
-    return false;
-  }
-
-  ctx->moves[ctx->num_moves].pos = ctx->home;
-  ctx->moves[ctx->num_moves].dir = dir;
-  ctx->moves[ctx->num_moves].is_push = is_push;
-  ctx->num_moves++;
-
-  return true;
-}
-
-static bool
-sok_ctx_pop_move(
-  sok_ctx_t * const ctx,
-  sok_move_t * const ret
-) {
-  if (!ctx->num_moves) {
-    // return failure
-    return false;
-  }
-
-  // decriment moves
-  ctx->num_moves--;
-
-  if (ret) {
-    // save popped move
-    *ret = ctx->moves[ctx->num_moves];
-  }
-
-  // return success
-  return true;
-}
-
-static bool
-sok_ctx_move_box(
-  sok_ctx_t * const ctx,
-  const sok_pos_t old_pos,
-  const sok_pos_t new_pos
-) {
-  const size_t num_boxes = ctx->level.num_boxes,
-               box_ofs = pos_find(old_pos, ctx->boxes, num_boxes);
-
-  if (box_ofs < num_boxes) {
-    // update box and goal count
-    ctx->boxes[box_ofs] = new_pos;
-    ctx->num_goals_left = sok_ctx_count_goals_left(ctx);
-    // ctx->is_lost = sok_ctx_has_corner_boxes(ctx);
-
-    // return success
-    return true;
-  }
-
-  // return failure
-  return false;
-}
-
-bool
-sok_ctx_is_done(
-  const sok_ctx_t * const ctx
-) {
-  return ctx->num_goals_left == 0;
-}
-
-/*
- * bool
- * sok_ctx_is_lost(
- *   const sok_ctx_t * const ctx
- * ) {
- *   return ctx->is_lost;
- * }
- */
-
-bool
-sok_ctx_move(
-  sok_ctx_t * const ctx,
-  const sok_dir_t dir
-) {
-  if (ctx->num_moves >= SOK_CTX_MAX_MOVES - 1) {
-    // no more move slots available
-    return false;
-  }
-
-  const sok_pos_t ps[2] = {{
-    .x = ctx->home.x + ((dir == SOK_DIR_LEFT) ? -1 : ((dir == SOK_DIR_RIGHT) ? 1 : 0)),
-    .y = ctx->home.y + ((dir == SOK_DIR_UP) ? -1 : ((dir == SOK_DIR_DOWN) ? 1 : 0))
-  }, {
-    .x = ctx->home.x + ((dir == SOK_DIR_LEFT) ? -2 : ((dir == SOK_DIR_RIGHT) ? 2 : 0)),
-    .y = ctx->home.y + ((dir == SOK_DIR_UP) ? -2 : ((dir == SOK_DIR_DOWN) ? 2 : 0))
-  }};
-
-  const bool can_move = (
-    (dir == SOK_DIR_UP) ? (ctx->home.y > 0) :
-    ((dir == SOK_DIR_DOWN) ? (ctx->home.y < SOK_LEVEL_MAX_HEIGHT - 1) :
-    ((dir == SOK_DIR_LEFT) ? (ctx->home.x > 0) :
-    ((dir == SOK_DIR_RIGHT) ? (ctx->home.x < SOK_LEVEL_MAX_WIDTH - 1) :
-    false
-  ))));
-
-  const bool can_push = (
-    (dir == SOK_DIR_UP) ? (ctx->home.y > 1) :
-    ((dir == SOK_DIR_DOWN) ? (ctx->home.y < SOK_LEVEL_MAX_HEIGHT - 2) :
-    ((dir == SOK_DIR_LEFT) ? (ctx->home.x > 1) :
-    ((dir == SOK_DIR_RIGHT) ? (ctx->home.x < SOK_LEVEL_MAX_WIDTH - 2) :
-    false
-  ))));
-
-  if (
-    can_move &&
-    tile_is_floor(ctx, ps[0]) &&
-    !tile_is_box(ctx, ps[0])
-  ) {
-    // push move
-    if (!sok_ctx_push_move(ctx, dir, false)) {
-      return false;
-    }
-
-    // update position
-    ctx->home.x += (dir == SOK_DIR_LEFT) ? -1 : ((dir == SOK_DIR_RIGHT) ? 1 : 0);
-    ctx->home.y += (dir == SOK_DIR_UP) ? -1 : ((dir == SOK_DIR_DOWN) ? 1 : 0);
-
-    // return success
-    return true;
-  } else if (
-    can_push &&
-    tile_is_floor(ctx, ps[0]) &&
-    tile_is_box(ctx, ps[0]) &&
-    tile_is_floor(ctx, ps[1]) &&
-    !tile_is_box(ctx, ps[1])
-  ) {
-    // push move
-    if (!sok_ctx_push_move(ctx, dir, true)) {
-      return false;
-    }
-
-    // move box
-    if (!sok_ctx_move_box(ctx, ps[0], ps[1])) {
-      return false;
-    }
-
-    // update position
-    ctx->home.x += (dir == SOK_DIR_LEFT) ? -1 : ((dir == SOK_DIR_RIGHT) ? 1 : 0);
-    ctx->home.y += (dir == SOK_DIR_UP) ? -1 : ((dir == SOK_DIR_DOWN) ? 1 : 0);
-
-
-    // return success
-    return true;
-  }
-
-  // return failure
-  return false;
-}
-
-bool
-sok_ctx_undo(
-  sok_ctx_t * const ctx
-) {
-  sok_move_t move;
-  if (!sok_ctx_pop_move(ctx, &move)) {
-    // return failure
-    return false;
-  }
-
-  if (move.is_push) {
-    const sok_pos_t box_pos = {
-      .x = move.pos.x + ((move.dir == SOK_DIR_LEFT) ? -2 : ((move.dir == SOK_DIR_RIGHT) ? 2 : 0)),
-      .y = move.pos.y + ((move.dir == SOK_DIR_UP) ? -2 : ((move.dir == SOK_DIR_DOWN) ? 2 : 0)),
-    };
-
-    sok_ctx_move_box(ctx, box_pos, ctx->home);
-  }
-
-  // update position
-  ctx->home = move.pos;
-
-  // return success
-  return true;
-}
-
-bool sok_ctx_walk(
-  const sok_ctx_t * const ctx,
-  const sok_ctx_walk_cbs_t * const cbs,
-  void * const data
-) {
-  if (!cbs) {
-    return false;
-  }
-
-  if (cbs->on_size) {
-    // emit size
-    if (!cbs->on_size(ctx, ctx->level.size, data)) {
-      return false;
-    }
-  }
-
-  if (cbs->on_walls_start && !cbs->on_walls_start(ctx, data)) {
-    return false;
-  }
-
-  if (cbs->on_wall) {
-    // walk walls
-    for (size_t i = 0; i < (ctx->level.size.x * ctx->level.size.y); i++) {
-      const sok_pos_t pos = {
-        .y = i / ctx->level.size.x,
-        .x = i % ctx->level.size.x,
-      };
-
-      if (ctx_is_wall(ctx, pos)) {
-        // emit wall
-        if (!cbs->on_wall(ctx, pos, data)) {
-          return false;
-        }
-      }
-    }
-  }
-
-  if (cbs->on_walls_end && !cbs->on_walls_end(ctx, data)) {
-    return false;
-  }
-
-  if (cbs->on_goals_start && !cbs->on_goals_start(ctx, data)) {
-    return false;
-  }
-
-  if (cbs->on_goal) {
-    // walk goals
-    for (size_t i = 0; i < ctx->level.num_goals; i++) {
-      const bool has_player = POINTS_EQUAL(ctx->level.goals[i], ctx->home);
-      const bool has_box = tile_is_box(ctx, ctx->level.goals[i]);
-
-      // emit goal
-      if (!cbs->on_goal(ctx, ctx->level.goals[i], has_player, has_box, data)) {
-        return false;
-      }
-    }
-  }
-
-  if (cbs->on_goals_end && !cbs->on_goals_end(ctx, data)) {
-    return false;
-  }
-
-  if (cbs->on_boxes_start && !cbs->on_boxes_start(ctx, data)) {
-    return false;
-  }
-
-  if (cbs->on_home) {
-    const bool has_goal = tile_is_goal(ctx, ctx->home);
-
-    // emit home
-    if (!cbs->on_home(ctx, ctx->home, has_goal, data)) {
-      return false;
-    }
-  }
-
-  if (cbs->on_box) {
-    // walk boxes
-    for (size_t i = 0; i < ctx->level.num_boxes; i++) {
-      const bool has_goal = tile_is_goal(ctx, ctx->boxes[i]);
-
-      // emit box
-      if (!cbs->on_box(ctx, ctx->boxes[i], has_goal, data)) {
-        return false;
-      }
-    }
-  }
-
-  if (cbs->on_boxes_end && !cbs->on_boxes_end(ctx, data)) {
-    return false;
-  }
-
-  if (cbs->on_moves_start && !cbs->on_moves_start(ctx, data)) {
-    return false;
-  }
-
-  if (cbs->on_move) {
-    // walk moves
-    for (size_t i = 0; i < ctx->num_moves; i++) {
-      // emit move
-      if (!cbs->on_move(ctx, ctx->moves[i], data)) {
-        return false;
-      }
-    }
-  }
-
-  if (cbs->on_moves_end && !cbs->on_moves_end(ctx, data)) {
-    return false;
-  }
-
-  // return success
-  return true;
-}