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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef MICROPY_INCLUDED_PY_PARSE_H
#define MICROPY_INCLUDED_PY_PARSE_H
#include <stddef.h>
#include <stdint.h>
#include "py/obj.h"
struct _mp_lexer_t;
// a mp_parse_node_t is:
// - 0000...0000: no node
// - xxxx...xxx1: a small integer; bits 1 and above are the signed value, 2's complement
// - xxxx...xx00: pointer to mp_parse_node_struct_t
// - xx...xx0010: an identifier; bits 4 and above are the qstr
// - xx...xx0110: a string; bits 4 and above are the qstr holding the value
// - xx...xx1010: a token; bits 4 and above are mp_token_kind_t
#define MP_PARSE_NODE_NULL (0)
#define MP_PARSE_NODE_SMALL_INT (0x1)
#define MP_PARSE_NODE_ID (0x02)
#define MP_PARSE_NODE_STRING (0x06)
#define MP_PARSE_NODE_TOKEN (0x0a)
typedef uintptr_t mp_parse_node_t; // must be pointer size
typedef struct _mp_parse_node_struct_t {
uint32_t source_line; // line number in source file
uint32_t kind_num_nodes; // parse node kind, and number of nodes
mp_parse_node_t nodes[]; // nodes
} mp_parse_node_struct_t;
// macros for mp_parse_node_t usage
// some of these evaluate their argument more than once
#define MP_PARSE_NODE_IS_NULL(pn) ((pn) == MP_PARSE_NODE_NULL)
#define MP_PARSE_NODE_IS_LEAF(pn) ((pn) & 3)
#define MP_PARSE_NODE_IS_STRUCT(pn) ((pn) != MP_PARSE_NODE_NULL && ((pn) & 3) == 0)
#define MP_PARSE_NODE_IS_STRUCT_KIND(pn, k) ((pn) != MP_PARSE_NODE_NULL && ((pn) & 3) == 0 && MP_PARSE_NODE_STRUCT_KIND((mp_parse_node_struct_t *)(pn)) == (k))
#define MP_PARSE_NODE_IS_SMALL_INT(pn) (((pn) & 0x1) == MP_PARSE_NODE_SMALL_INT)
#define MP_PARSE_NODE_IS_ID(pn) (((pn) & 0x0f) == MP_PARSE_NODE_ID)
#define MP_PARSE_NODE_IS_TOKEN(pn) (((pn) & 0x0f) == MP_PARSE_NODE_TOKEN)
#define MP_PARSE_NODE_IS_TOKEN_KIND(pn, k) ((pn) == (MP_PARSE_NODE_TOKEN | ((k) << 4)))
#define MP_PARSE_NODE_LEAF_KIND(pn) ((pn) & 0x0f)
#define MP_PARSE_NODE_LEAF_ARG(pn) (((uintptr_t)(pn)) >> 4)
#define MP_PARSE_NODE_LEAF_SMALL_INT(pn) (((mp_int_t)(intptr_t)(pn)) >> 1)
#define MP_PARSE_NODE_STRUCT_KIND(pns) ((pns)->kind_num_nodes & 0xff)
#define MP_PARSE_NODE_STRUCT_NUM_NODES(pns) ((pns)->kind_num_nodes >> 8)
static inline mp_parse_node_t mp_parse_node_new_small_int(mp_int_t val) {
return (mp_parse_node_t)(MP_PARSE_NODE_SMALL_INT | ((mp_uint_t)val << 1));
}
static inline mp_parse_node_t mp_parse_node_new_leaf(size_t kind, mp_int_t arg) {
return (mp_parse_node_t)(kind | ((mp_uint_t)arg << 4));
}
static inline mp_obj_t mp_parse_node_extract_const_object(mp_parse_node_struct_t *pns) {
#if MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_D
// nodes are 32-bit pointers, but need to extract 64-bit object
return (uint64_t)pns->nodes[0] | ((uint64_t)pns->nodes[1] << 32);
#else
return (mp_obj_t)pns->nodes[0];
#endif
}
bool mp_parse_node_is_const_false(mp_parse_node_t pn);
bool mp_parse_node_is_const_true(mp_parse_node_t pn);
bool mp_parse_node_get_int_maybe(mp_parse_node_t pn, mp_obj_t *o);
size_t mp_parse_node_extract_list(mp_parse_node_t *pn, size_t pn_kind, mp_parse_node_t **nodes);
void mp_parse_node_print(const mp_print_t *print, mp_parse_node_t pn, size_t indent);
typedef enum {
MP_PARSE_SINGLE_INPUT,
MP_PARSE_FILE_INPUT,
MP_PARSE_EVAL_INPUT,
} mp_parse_input_kind_t;
typedef struct _mp_parse_t {
mp_parse_node_t root;
struct _mp_parse_chunk_t *chunk;
} mp_parse_tree_t;
// the parser will raise an exception if an error occurred
// the parser will free the lexer before it returns
mp_parse_tree_t mp_parse(struct _mp_lexer_t *lex, mp_parse_input_kind_t input_kind);
void mp_parse_tree_clear(mp_parse_tree_t *tree);
#endif // MICROPY_INCLUDED_PY_PARSE_H
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