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author | Raghuram Subramani <raghus2247@gmail.com> | 2022-06-19 19:47:51 +0530 |
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committer | Raghuram Subramani <raghus2247@gmail.com> | 2022-06-19 19:47:51 +0530 |
commit | 4fd287655a72b9aea14cdac715ad5b90ed082ed2 (patch) | |
tree | 65d393bc0e699dd12d05b29ba568e04cea666207 /circuitpython/py/parse.h | |
parent | 0150f70ce9c39e9e6dd878766c0620c85e47bed0 (diff) |
add circuitpython code
Diffstat (limited to '')
-rw-r--r-- | circuitpython/py/parse.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/circuitpython/py/parse.h b/circuitpython/py/parse.h new file mode 100644 index 0000000..5f1e30c --- /dev/null +++ b/circuitpython/py/parse.h @@ -0,0 +1,107 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * SPDX-FileCopyrightText: 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 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); +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 |