Own fork of MbedSmartRest
Dependents: MbedSmartRestMain MbedSmartRestMain
Fork of MbedSmartRest by
Parser.cpp@26:9c36af176d91, 2015-08-10 (annotated)
- Committer:
- xinlei
- Date:
- Mon Aug 10 10:39:53 2015 +0000
- Revision:
- 26:9c36af176d91
- Parent:
- 20:505d29d5bdfc
removed traffic accounting
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Cumulocity | 0:099f76422485 | 1 | /* |
Cumulocity | 0:099f76422485 | 2 | * Parser.cpp |
Cumulocity | 0:099f76422485 | 3 | * |
Cumulocity | 0:099f76422485 | 4 | * Created on: Nov 1, 2013 |
Cumulocity | 0:099f76422485 | 5 | * * Authors: Vincent Wochnik <v.wochnik@gmail.com> |
Cumulocity | 0:099f76422485 | 6 | * |
Cumulocity | 0:099f76422485 | 7 | * Copyright (c) 2013 Cumulocity GmbH |
Cumulocity | 0:099f76422485 | 8 | * |
Cumulocity | 0:099f76422485 | 9 | * Permission is hereby granted, free of charge, to any person obtaining |
Cumulocity | 0:099f76422485 | 10 | * a copy of this software and associated documentation files (the |
Cumulocity | 0:099f76422485 | 11 | * "Software"), to deal in the Software without restriction, including |
Cumulocity | 0:099f76422485 | 12 | * without limitation the rights to use, copy, modify, merge, publish, |
Cumulocity | 0:099f76422485 | 13 | * distribute, sublicense, and/or sell copies of the Software, and to |
Cumulocity | 0:099f76422485 | 14 | * permit persons to whom the Software is furnished to do so, subject to |
Cumulocity | 0:099f76422485 | 15 | * the following conditions: |
Cumulocity | 0:099f76422485 | 16 | * |
Cumulocity | 0:099f76422485 | 17 | * The above copyright notice and this permission notice shall be |
Cumulocity | 0:099f76422485 | 18 | * included in all copies or substantial portions of the Software. |
Cumulocity | 0:099f76422485 | 19 | * |
Cumulocity | 0:099f76422485 | 20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
Cumulocity | 0:099f76422485 | 21 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
Cumulocity | 0:099f76422485 | 22 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
Cumulocity | 0:099f76422485 | 23 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
Cumulocity | 0:099f76422485 | 24 | * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
Cumulocity | 0:099f76422485 | 25 | * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
Cumulocity | 0:099f76422485 | 26 | * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
Cumulocity | 0:099f76422485 | 27 | */ |
Cumulocity | 0:099f76422485 | 28 | |
xinlei | 20:505d29d5bdfc | 29 | #include <assert.h> |
xinlei | 20:505d29d5bdfc | 30 | #include <stdio.h> |
xinlei | 20:505d29d5bdfc | 31 | #include <ctype.h> |
Cumulocity | 0:099f76422485 | 32 | #include "Parser.h" |
Cumulocity | 0:099f76422485 | 33 | |
Cumulocity | 0:099f76422485 | 34 | #define STATE_BLANK 0 |
Cumulocity | 0:099f76422485 | 35 | #define STATE_STRUCTURE 1 |
Cumulocity | 0:099f76422485 | 36 | #define STATE_VALUE 2 |
Cumulocity | 0:099f76422485 | 37 | #define STATE_INQUOTES 3 |
Cumulocity | 0:099f76422485 | 38 | #define STATE_AFTERQUOTE 4 |
Cumulocity | 0:099f76422485 | 39 | #define STATE_COMPLETE 5 |
Cumulocity | 0:099f76422485 | 40 | #define STATE_ERROR 6 |
Cumulocity | 0:099f76422485 | 41 | |
Cumulocity | 11:e1bee9a77652 | 42 | |
Cumulocity | 11:e1bee9a77652 | 43 | /*-------------------------------------------------------------------------*/ |
Cumulocity | 0:099f76422485 | 44 | Parser::Parser() |
Cumulocity | 0:099f76422485 | 45 | { |
Cumulocity | 11:e1bee9a77652 | 46 | reset(); |
Cumulocity | 0:099f76422485 | 47 | } |
Cumulocity | 11:e1bee9a77652 | 48 | /*-------------------------------------------------------------------------*/ |
Cumulocity | 0:099f76422485 | 49 | uint8_t Parser::readFrom(AbstractDataSource& source, ParsedRecord& record) |
Cumulocity | 0:099f76422485 | 50 | { |
Cumulocity | 11:e1bee9a77652 | 51 | reset(); |
Cumulocity | 11:e1bee9a77652 | 52 | record.clear(); |
Cumulocity | 0:099f76422485 | 53 | |
xinlei | 20:505d29d5bdfc | 54 | int status = -1; |
xinlei | 20:505d29d5bdfc | 55 | char read; |
xinlei | 20:505d29d5bdfc | 56 | while (_state < STATE_COMPLETE) { |
xinlei | 20:505d29d5bdfc | 57 | read = source.read(); |
xinlei | 20:505d29d5bdfc | 58 | status = source.status(); |
xinlei | 20:505d29d5bdfc | 59 | // if (isprint(read)) { |
xinlei | 20:505d29d5bdfc | 60 | // printf("%4c: %u\n", read, status); |
xinlei | 20:505d29d5bdfc | 61 | // } else { |
xinlei | 20:505d29d5bdfc | 62 | // printf("#%04x: %u\n", read, status); |
xinlei | 20:505d29d5bdfc | 63 | // } |
xinlei | 20:505d29d5bdfc | 64 | if (read > 0 || status == DS_STATUS_OK) |
xinlei | 20:505d29d5bdfc | 65 | parse(read); |
xinlei | 20:505d29d5bdfc | 66 | else |
xinlei | 20:505d29d5bdfc | 67 | break; |
xinlei | 20:505d29d5bdfc | 68 | } |
xinlei | 20:505d29d5bdfc | 69 | // printf("Parser: [E]while! %u, %d\r\n", _state, status); |
xinlei | 20:505d29d5bdfc | 70 | if (_state == STATE_COMPLETE) { // successfully read record |
Cumulocity | 11:e1bee9a77652 | 71 | if (!record.set(_buffer, _count)) |
Cumulocity | 11:e1bee9a77652 | 72 | return PARSER_INTERNAL_ERROR; |
xinlei | 20:505d29d5bdfc | 73 | else |
xinlei | 20:505d29d5bdfc | 74 | return PARSER_SUCCESS; |
xinlei | 20:505d29d5bdfc | 75 | } else if (_state == STATE_BLANK) { |
Cumulocity | 11:e1bee9a77652 | 76 | if (status == DS_STATUS_CLOSED) |
Cumulocity | 11:e1bee9a77652 | 77 | return PARSER_END_OF_RESPONSE; |
Cumulocity | 11:e1bee9a77652 | 78 | else if (status == DS_STATUS_TIMEOUT) |
Cumulocity | 11:e1bee9a77652 | 79 | return PARSER_TIMEOUT_ERROR; |
Cumulocity | 11:e1bee9a77652 | 80 | else |
Cumulocity | 11:e1bee9a77652 | 81 | return PARSER_INTERNAL_ERROR; |
xinlei | 20:505d29d5bdfc | 82 | } else { |
xinlei | 20:505d29d5bdfc | 83 | if (status == DS_STATUS_TIMEOUT) |
xinlei | 20:505d29d5bdfc | 84 | return PARSER_TIMEOUT_ERROR; |
xinlei | 20:505d29d5bdfc | 85 | else if (status == DS_STATUS_ERROR) |
xinlei | 20:505d29d5bdfc | 86 | return PARSER_INTERNAL_ERROR; |
xinlei | 20:505d29d5bdfc | 87 | else |
xinlei | 20:505d29d5bdfc | 88 | return PARSER_PARSE_ERROR; |
Cumulocity | 11:e1bee9a77652 | 89 | } |
Cumulocity | 0:099f76422485 | 90 | } |
Cumulocity | 11:e1bee9a77652 | 91 | /*-------------------------------------------------------------------------*/ |
Cumulocity | 0:099f76422485 | 92 | void Parser::parse(char c) |
Cumulocity | 0:099f76422485 | 93 | { |
xinlei | 20:505d29d5bdfc | 94 | if (_ptr-_buffer >= SMARTREST_PARSER_BUFFER_SIZE) { |
Cumulocity | 11:e1bee9a77652 | 95 | _state = STATE_ERROR; |
Cumulocity | 11:e1bee9a77652 | 96 | return; |
Cumulocity | 11:e1bee9a77652 | 97 | } |
Cumulocity | 0:099f76422485 | 98 | |
Cumulocity | 11:e1bee9a77652 | 99 | switch (_state) |
Cumulocity | 11:e1bee9a77652 | 100 | { |
xinlei | 20:505d29d5bdfc | 101 | case STATE_BLANK: _state = STATE_STRUCTURE; |
xinlei | 20:505d29d5bdfc | 102 | case STATE_STRUCTURE: |
xinlei | 20:505d29d5bdfc | 103 | switch (c) |
xinlei | 20:505d29d5bdfc | 104 | { |
xinlei | 20:505d29d5bdfc | 105 | case ' ': |
xinlei | 20:505d29d5bdfc | 106 | case '\t': |
xinlei | 20:505d29d5bdfc | 107 | case '\r': break; |
xinlei | 20:505d29d5bdfc | 108 | case '"': _state = STATE_INQUOTES; break; |
xinlei | 20:505d29d5bdfc | 109 | case ',': close(); break; |
xinlei | 20:505d29d5bdfc | 110 | case '\0': |
xinlei | 20:505d29d5bdfc | 111 | case '\n': |
xinlei | 20:505d29d5bdfc | 112 | if (_count==0 && _length==0) { |
xinlei | 20:505d29d5bdfc | 113 | _state = STATE_BLANK; |
xinlei | 20:505d29d5bdfc | 114 | } else { |
xinlei | 20:505d29d5bdfc | 115 | close(); |
xinlei | 20:505d29d5bdfc | 116 | _state = STATE_COMPLETE; |
xinlei | 20:505d29d5bdfc | 117 | } |
xinlei | 20:505d29d5bdfc | 118 | break; |
xinlei | 20:505d29d5bdfc | 119 | default: |
xinlei | 20:505d29d5bdfc | 120 | if (_length > 0) { |
xinlei | 20:505d29d5bdfc | 121 | _state = STATE_ERROR; |
xinlei | 20:505d29d5bdfc | 122 | } else { |
xinlei | 20:505d29d5bdfc | 123 | _state = STATE_VALUE; |
xinlei | 20:505d29d5bdfc | 124 | parse(c); |
Cumulocity | 11:e1bee9a77652 | 125 | } |
Cumulocity | 11:e1bee9a77652 | 126 | break; |
xinlei | 20:505d29d5bdfc | 127 | } |
xinlei | 20:505d29d5bdfc | 128 | break; |
xinlei | 20:505d29d5bdfc | 129 | case STATE_VALUE: |
xinlei | 20:505d29d5bdfc | 130 | switch (c) |
xinlei | 20:505d29d5bdfc | 131 | { |
xinlei | 20:505d29d5bdfc | 132 | case ',': |
xinlei | 20:505d29d5bdfc | 133 | case '\n': _state = STATE_STRUCTURE; parse(c); break; |
xinlei | 20:505d29d5bdfc | 134 | case '"': _state = STATE_ERROR; break; |
xinlei | 20:505d29d5bdfc | 135 | default: |
xinlei | 20:505d29d5bdfc | 136 | if ((c == ' ') || (c == '\t') || (c == '\r')) |
xinlei | 20:505d29d5bdfc | 137 | _trailing++; |
xinlei | 20:505d29d5bdfc | 138 | else |
xinlei | 20:505d29d5bdfc | 139 | _trailing = 0; |
xinlei | 20:505d29d5bdfc | 140 | append(c); |
Cumulocity | 11:e1bee9a77652 | 141 | break; |
xinlei | 20:505d29d5bdfc | 142 | } |
xinlei | 20:505d29d5bdfc | 143 | break; |
xinlei | 20:505d29d5bdfc | 144 | case STATE_INQUOTES: |
xinlei | 20:505d29d5bdfc | 145 | switch (c) |
xinlei | 20:505d29d5bdfc | 146 | { |
xinlei | 20:505d29d5bdfc | 147 | case '"': _state = STATE_AFTERQUOTE; break; |
xinlei | 20:505d29d5bdfc | 148 | default: append(c); break; |
xinlei | 20:505d29d5bdfc | 149 | } |
xinlei | 20:505d29d5bdfc | 150 | break; |
xinlei | 20:505d29d5bdfc | 151 | case STATE_AFTERQUOTE: |
xinlei | 20:505d29d5bdfc | 152 | switch (c) |
xinlei | 20:505d29d5bdfc | 153 | { |
xinlei | 20:505d29d5bdfc | 154 | case '"': append(c); _state = STATE_INQUOTES; break; |
xinlei | 20:505d29d5bdfc | 155 | default: _state = STATE_STRUCTURE; parse(c); break; |
xinlei | 20:505d29d5bdfc | 156 | } |
xinlei | 20:505d29d5bdfc | 157 | break; |
Cumulocity | 11:e1bee9a77652 | 158 | } |
Cumulocity | 0:099f76422485 | 159 | } |
Cumulocity | 11:e1bee9a77652 | 160 | /*-------------------------------------------------------------------------*/ |
Cumulocity | 0:099f76422485 | 161 | void Parser::append(char c) |
Cumulocity | 0:099f76422485 | 162 | { |
Cumulocity | 11:e1bee9a77652 | 163 | *_ptr++ = c; |
Cumulocity | 11:e1bee9a77652 | 164 | _length++; |
Cumulocity | 0:099f76422485 | 165 | } |
Cumulocity | 11:e1bee9a77652 | 166 | /*-------------------------------------------------------------------------*/ |
Cumulocity | 0:099f76422485 | 167 | void Parser::close() |
Cumulocity | 0:099f76422485 | 168 | { |
Cumulocity | 11:e1bee9a77652 | 169 | _ptr -= _trailing; |
Cumulocity | 11:e1bee9a77652 | 170 | *_ptr++ = 0; |
Cumulocity | 11:e1bee9a77652 | 171 | _trailing = 0; |
Cumulocity | 11:e1bee9a77652 | 172 | _length = 0; |
Cumulocity | 11:e1bee9a77652 | 173 | _count++; |
Cumulocity | 0:099f76422485 | 174 | } |
Cumulocity | 11:e1bee9a77652 | 175 | /*-------------------------------------------------------------------------*/ |
Cumulocity | 0:099f76422485 | 176 | void Parser::reset() |
Cumulocity | 0:099f76422485 | 177 | { |
Cumulocity | 11:e1bee9a77652 | 178 | _state = STATE_BLANK; |
Cumulocity | 11:e1bee9a77652 | 179 | _ptr = _buffer; |
Cumulocity | 11:e1bee9a77652 | 180 | _count = 0; |
Cumulocity | 11:e1bee9a77652 | 181 | _trailing = 0; |
Cumulocity | 11:e1bee9a77652 | 182 | _length = 0; |
Cumulocity | 0:099f76422485 | 183 | } |
Cumulocity | 11:e1bee9a77652 | 184 | /*-------------------------------------------------------------------------*/ |