initial commit

1 files changed, 159 insertions, 0 deletions

diff --git a/src/sok-level-parser.c b/src/sok-level-parser.c
new file mode 100644
index 0000000..eec08c3
--- /dev/null
+++ b/src/sok-level-parser.c
@@ -0,0 +1,159 @@
+#include <stdbool.h>
+#include <stddef.h> // size_t
+#include "sok.h"
+
+#define UNUSED(a) ((void) (a))
+
+void
+sok_level_parser_init(
+  sok_level_parser_t * const parser, 
+  const sok_level_parser_cbs_t * const cbs,
+  void * const user_data
+) {
+  parser->cbs = cbs;
+  parser->user_data = user_data;
+}
+
+bool
+sok_level_parser_parse(
+  sok_level_parser_t * const parser,
+  const char * const buf,
+  const size_t buf_len
+) {
+  sok_pos_t size = { .x = 0, .y = 0 };
+
+  for (size_t i = 0, w = 0; i < buf_len; i++) {
+    if (buf[i] == '|') {
+      if (w > size.x) {
+        size.x = w;
+      }
+
+      // reset column position, increment row count
+      w = 0;
+      size.y++;
+    } else {
+      w++;
+    }
+  }
+
+  // increment row count
+  size.y++;
+
+  // emit level size
+  if (
+    parser->cbs->on_size &&
+    !parser->cbs->on_size(parser, size) 
+  ) {
+    // return failure
+    return false;
+  }
+
+  sok_pos_t pos = { 0, 0 };
+  for (size_t i = 0; i < buf_len; i++) {
+    switch (buf[i]) {
+    case '|':
+      // new line
+      pos.x = 0;
+      pos.y++;
+
+      break;
+    case '-':
+    case '_':
+    case ' ':
+      // advance
+      pos.x++;
+
+      break;
+    case '+':
+      // emit goal
+      if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // emit home
+      if (parser->cbs->on_home && !parser->cbs->on_home(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // advance
+      pos.x++;
+
+      break;
+    case '@':
+      // emit home
+      if (parser->cbs->on_home && !parser->cbs->on_home(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // advance
+      pos.x++;
+
+      break;
+    case '#':
+      // emit wall
+      if (parser->cbs->on_wall && !parser->cbs->on_wall(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // advance
+      pos.x++;
+
+      break;
+    case '*':
+      // emit goal
+      if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // emit box
+      if (parser->cbs->on_box && !parser->cbs->on_box(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // advance
+      pos.x++;
+
+      break;
+    case '.':
+      // emit goal
+      if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // advance
+      pos.x++;
+
+      break;
+    case '$':
+      // emit box
+      if (parser->cbs->on_box && !parser->cbs->on_box(parser, pos)) {
+        // return failure
+        return false;
+      }
+
+      // advance
+      pos.x++;
+
+      break;
+    default:
+      // emit junk
+      if (parser->cbs->on_junk && !parser->cbs->on_junk(parser, i, buf[i])) {
+        // return failure
+        return false;
+      }
+
+      // return failure
+      return false;
+    }
+  }
+
+  // return success
+  return true;
+}