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