// Copyright 2024 Google LLC

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     https://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include <stdint.h>

#ifdef WASM
    #define WASM_EXPORT(name) __attribute__((export_name(name)))
    void * alloc(int size);
#else
    #define WASM_EXPORT(name)
#endif



#define BUFFER(name, type, size) type name[size]; \
  WASM_EXPORT("_get_"#name) type* get_##name() {return name;} \
  WASM_EXPORT("_len_"#name"__"#type) int get_##name##_len() {return (size);}

#define DYNAMIC_BUFFER(name, type) type * name = NULL; int name##_len = 0; \
  WASM_EXPORT("_get_"#name) type* get_##name() {return name;} \
  WASM_EXPORT("_len_"#name"__"#type) int get_##name##_len() {return (name##_len);} \
  void name##_alloc(int size) {name = (type*)alloc(size*sizeof(type)); name##_len = size;}


enum {
    TAPE_LENGTH = 16, // must be 2 ** N
    PAIR_LENGTH = TAPE_LENGTH * 2 
};