96 lines
4.2 KiB
C
96 lines
4.2 KiB
C
/*
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* This file is part of the Micro Python 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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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...x00010: an identifier; bits 5 and above are the qstr
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// - xx...x00110: an integer; bits 5 and above are the qstr holding the value
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// - xx...x01010: a decimal; bits 5 and above are the qstr holding the value
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// - xx...x01110: a string; bits 5 and above are the qstr holding the value
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// - xx...x10010: a string of bytes; bits 5 and above are the qstr holding the value
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// - xx...x10110: a token; bits 5 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_INTEGER (0x06)
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#define MP_PARSE_NODE_DECIMAL (0x0a)
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#define MP_PARSE_NODE_STRING (0x0e)
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#define MP_PARSE_NODE_BYTES (0x12)
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#define MP_PARSE_NODE_TOKEN (0x16)
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typedef mp_uint_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) & 0x1f) == MP_PARSE_NODE_ID)
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#define MP_PARSE_NODE_IS_TOKEN(pn) (((pn) & 0x1f) == MP_PARSE_NODE_TOKEN)
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#define MP_PARSE_NODE_IS_TOKEN_KIND(pn, k) ((pn) == (MP_PARSE_NODE_TOKEN | ((k) << 5)))
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#define MP_PARSE_NODE_LEAF_KIND(pn) ((pn) & 0x1f)
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#define MP_PARSE_NODE_LEAF_ARG(pn) (((mp_uint_t)(pn)) >> 5)
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#define MP_PARSE_NODE_LEAF_SMALL_INT(pn) (((mp_int_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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mp_parse_node_t mp_parse_node_new_leaf(mp_int_t kind, mp_int_t arg);
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void mp_parse_node_free(mp_parse_node_t pn);
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void mp_parse_node_print(mp_parse_node_t pn, mp_uint_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 enum {
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MP_PARSE_ERROR_MEMORY,
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MP_PARSE_ERROR_UNEXPECTED_INDENT,
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MP_PARSE_ERROR_UNMATCHED_UNINDENT,
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MP_PARSE_ERROR_INVALID_SYNTAX,
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} mp_parse_error_kind_t;
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// returns MP_PARSE_NODE_NULL on error, and then parse_error_kind_out is valid
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mp_parse_node_t mp_parse(struct _mp_lexer_t *lex, mp_parse_input_kind_t input_kind, mp_parse_error_kind_t *parse_error_kind_out);
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