add if statement and declaration

src/translator/if/if.c

@@ -0,0 +1,45 @@
+#include "../../parser/if/if.h"
+#include "../translator.h"
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+
+size_t translate_parsed_if(Translated *translated, DArray *parsedIf) {
+  size_t *jump_after_body_positions =
+      checked_malloc(parsedIf->size * sizeof(size_t));
+
+  size_t first = translated->bytecode.size;
+
+  set_registers(translated, 1);
+
+  for (uint64_t i = 0; i < parsedIf->size; i++) {
+    ParsedConditional *condition = darray_get(parsedIf, i);
+    push_instruction_byte(translated, OP_NEW_SCOPE);
+    if (condition->condition) {
+      translate_parsed(translated, condition->condition);
+      push_instruction_byte(translated, OP_BOOL);
+      push_instruction_byte(translated, 0);
+      push_instruction_byte(translated, OP_JUMP_IF_FALSE);
+      push_instruction_byte(translated, 0);
+      uint64_t last_jump_index = push_instruction_code(translated, 0);
+      translate_parsed(translated, condition->content);
+      push_instruction_byte(translated, OP_POP_SCOPE);
+      push_instruction_byte(translated, OP_JUMP);
+      jump_after_body_positions[i] = push_instruction_code(translated, 0);
+      set_instruction_code(translated, last_jump_index,
+                           translated->bytecode.size);
+      push_instruction_byte(translated, OP_POP_SCOPE);
+    } else {
+      translate_parsed(translated, condition->content);
+      push_instruction_byte(translated, OP_POP_SCOPE);
+      jump_after_body_positions[i] = 0;
+    }
+  }
+  for (uint64_t i = 0; i < parsedIf->size; i++) {
+    if (jump_after_body_positions[i])
+      set_instruction_code(translated, jump_after_body_positions[i],
+                           translated->bytecode.size);
+  }
+  free(jump_after_body_positions);
+  return first;
+}

src/translator/if/if.h

@@ -0,0 +1,7 @@
+#ifndef TRANSLATE_iF_H
+#define TRANSLATE_iF_H
+#include "../translator.h"
+
+size_t translate_parsed_if(Translated *translated, DArray *parsedIf);
+
+#endif // TRANSLATE_iF_H