/* * This file is part of the Micro Python 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 #include #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 string of bytes; bits 4 and above are the qstr holding the value // - xx...xx1110: 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_BYTES (0x0a) #define MP_PARSE_NODE_TOKEN (0x0e) 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)); } 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); int mp_parse_node_extract_list(mp_parse_node_t *pn, size_t pn_kind, mp_parse_node_t **nodes); void mp_parse_node_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