1 | <?php |
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2 | /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
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3 | |
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4 | /** |
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5 | * Converts to and from JSON format. |
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6 | * |
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7 | * JSON (JavaScript Object Notation) is a lightweight data-interchange |
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8 | * format. It is easy for humans to read and write. It is easy for machines |
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9 | * to parse and generate. It is based on a subset of the JavaScript |
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10 | * Programming Language, Standard ECMA-262 3rd Edition - December 1999. |
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11 | * This feature can also be found in Python. JSON is a text format that is |
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12 | * completely language independent but uses conventions that are familiar |
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13 | * to programmers of the C-family of languages, including C, C++, C#, Java, |
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14 | * JavaScript, Perl, TCL, and many others. These properties make JSON an |
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15 | * ideal data-interchange language. |
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16 | * |
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17 | * This package provides a simple encoder and decoder for JSON notation. It |
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18 | * is intended for use with client-side Javascript applications that make |
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19 | * use of HTTPRequest to perform server communication functions - data can |
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20 | * be encoded into JSON notation for use in a client-side javascript, or |
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21 | * decoded from incoming Javascript requests. JSON format is native to |
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22 | * Javascript, and can be directly eval()'ed with no further parsing |
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23 | * overhead |
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24 | * |
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25 | * All strings should be in ASCII or UTF-8 format! |
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26 | * |
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27 | * LICENSE: Redistribution and use in source and binary forms, with or |
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28 | * without modification, are permitted provided that the following |
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29 | * conditions are met: Redistributions of source code must retain the |
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30 | * above copyright notice, this list of conditions and the following |
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31 | * disclaimer. Redistributions in binary form must reproduce the above |
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32 | * copyright notice, this list of conditions and the following disclaimer |
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33 | * in the documentation and/or other materials provided with the |
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34 | * distribution. |
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35 | * |
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36 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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37 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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38 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
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39 | * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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40 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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41 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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42 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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43 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
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44 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
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45 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
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46 | * DAMAGE. |
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47 | * |
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48 | * @category |
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49 | * @package Services_JSON |
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50 | * @author Michal Migurski <mike-json@teczno.com> |
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51 | * @author Matt Knapp <mdknapp[at]gmail[dot]com> |
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52 | * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> |
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53 | * @copyright 2005 Michal Migurski |
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54 | * @version CVS: $Id: JSON.php,v 1.31 2006/06/28 05:54:17 migurski Exp $ |
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55 | * @license http://www.opensource.org/licenses/bsd-license.php |
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56 | * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 |
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57 | */ |
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58 | |
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59 | /** |
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60 | * Marker constant for Services_JSON::decode(), used to flag stack state |
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61 | */ |
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62 | define('SERVICES_JSON_SLICE', 1); |
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63 | |
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64 | /** |
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65 | * Marker constant for Services_JSON::decode(), used to flag stack state |
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66 | */ |
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67 | define('SERVICES_JSON_IN_STR', 2); |
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68 | |
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69 | /** |
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70 | * Marker constant for Services_JSON::decode(), used to flag stack state |
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71 | */ |
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72 | define('SERVICES_JSON_IN_ARR', 3); |
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73 | |
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74 | /** |
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75 | * Marker constant for Services_JSON::decode(), used to flag stack state |
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76 | */ |
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77 | define('SERVICES_JSON_IN_OBJ', 4); |
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78 | |
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79 | /** |
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80 | * Marker constant for Services_JSON::decode(), used to flag stack state |
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81 | */ |
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82 | define('SERVICES_JSON_IN_CMT', 5); |
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83 | |
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84 | /** |
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85 | * Behavior switch for Services_JSON::decode() |
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86 | */ |
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87 | define('SERVICES_JSON_LOOSE_TYPE', 16); |
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88 | |
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89 | /** |
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90 | * Behavior switch for Services_JSON::decode() |
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91 | */ |
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92 | define('SERVICES_JSON_SUPPRESS_ERRORS', 32); |
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93 | |
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94 | /** |
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95 | * Converts to and from JSON format. |
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96 | * |
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97 | * Brief example of use: |
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98 | * |
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99 | * <code> |
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100 | * // create a new instance of Services_JSON |
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101 | * $json = new Services_JSON(); |
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102 | * |
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103 | * // convert a complexe value to JSON notation, and send it to the browser |
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104 | * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4))); |
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105 | * $output = $json->encode($value); |
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106 | * |
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107 | * print($output); |
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108 | * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]] |
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109 | * |
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110 | * // accept incoming POST data, assumed to be in JSON notation |
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111 | * $input = file_get_contents('php://input', 1000000); |
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112 | * $value = $json->decode($input); |
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113 | * </code> |
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114 | */ |
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115 | class Services_JSON |
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116 | { |
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117 | /** |
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118 | * constructs a new JSON instance |
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119 | * |
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120 | * @param int $use object behavior flags; combine with boolean-OR |
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121 | * |
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122 | * possible values: |
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123 | * - SERVICES_JSON_LOOSE_TYPE: loose typing. |
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124 | * "{...}" syntax creates associative arrays |
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125 | * instead of objects in decode(). |
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126 | * - SERVICES_JSON_SUPPRESS_ERRORS: error suppression. |
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127 | * Values which can't be encoded (e.g. resources) |
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128 | * appear as NULL instead of throwing errors. |
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129 | * By default, a deeply-nested resource will |
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130 | * bubble up with an error, so all return values |
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131 | * from encode() should be checked with isError() |
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132 | */ |
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133 | function Services_JSON($use = 0) |
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134 | { |
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135 | $this->use = $use; |
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136 | } |
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137 | |
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138 | /** |
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139 | * convert a string from one UTF-16 char to one UTF-8 char |
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140 | * |
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141 | * Normally should be handled by mb_convert_encoding, but |
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142 | * provides a slower PHP-only method for installations |
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143 | * that lack the multibye string extension. |
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144 | * |
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145 | * @param string $utf16 UTF-16 character |
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146 | * @return string UTF-8 character |
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147 | * @access private |
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148 | */ |
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149 | function utf162utf8($utf16) |
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150 | { |
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151 | // oh please oh please oh please oh please oh please |
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152 | if(function_exists('mb_convert_encoding')) { |
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153 | return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); |
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154 | } |
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155 | |
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156 | $bytes = (ord($utf16{0}) << 8) | ord($utf16{1}); |
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157 | |
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158 | switch(true) { |
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159 | case ((0x7F & $bytes) == $bytes): |
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160 | // this case should never be reached, because we are in ASCII range |
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161 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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162 | return chr(0x7F & $bytes); |
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163 | |
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164 | case (0x07FF & $bytes) == $bytes: |
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165 | // return a 2-byte UTF-8 character |
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166 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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167 | return chr(0xC0 | (($bytes >> 6) & 0x1F)) |
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168 | . chr(0x80 | ($bytes & 0x3F)); |
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169 | |
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170 | case (0xFFFF & $bytes) == $bytes: |
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171 | // return a 3-byte UTF-8 character |
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172 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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173 | return chr(0xE0 | (($bytes >> 12) & 0x0F)) |
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174 | . chr(0x80 | (($bytes >> 6) & 0x3F)) |
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175 | . chr(0x80 | ($bytes & 0x3F)); |
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176 | } |
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177 | |
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178 | // ignoring UTF-32 for now, sorry |
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179 | return ''; |
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180 | } |
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181 | |
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182 | /** |
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183 | * convert a string from one UTF-8 char to one UTF-16 char |
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184 | * |
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185 | * Normally should be handled by mb_convert_encoding, but |
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186 | * provides a slower PHP-only method for installations |
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187 | * that lack the multibye string extension. |
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188 | * |
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189 | * @param string $utf8 UTF-8 character |
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190 | * @return string UTF-16 character |
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191 | * @access private |
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192 | */ |
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193 | function utf82utf16($utf8) |
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194 | { |
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195 | // oh please oh please oh please oh please oh please |
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196 | if(function_exists('mb_convert_encoding')) { |
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197 | return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); |
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198 | } |
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199 | |
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200 | switch(strlen($utf8)) { |
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201 | case 1: |
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202 | // this case should never be reached, because we are in ASCII range |
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203 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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204 | return $utf8; |
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205 | |
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206 | case 2: |
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207 | // return a UTF-16 character from a 2-byte UTF-8 char |
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208 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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209 | return chr(0x07 & (ord($utf8{0}) >> 2)) |
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210 | . chr((0xC0 & (ord($utf8{0}) << 6)) |
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211 | | (0x3F & ord($utf8{1}))); |
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212 | |
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213 | case 3: |
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214 | // return a UTF-16 character from a 3-byte UTF-8 char |
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215 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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216 | return chr((0xF0 & (ord($utf8{0}) << 4)) |
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217 | | (0x0F & (ord($utf8{1}) >> 2))) |
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218 | . chr((0xC0 & (ord($utf8{1}) << 6)) |
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219 | | (0x7F & ord($utf8{2}))); |
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220 | } |
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221 | |
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222 | // ignoring UTF-32 for now, sorry |
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223 | return ''; |
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224 | } |
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225 | |
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226 | /** |
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227 | * encodes an arbitrary variable into JSON format |
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228 | * |
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229 | * @param mixed $var any number, boolean, string, array, or object to be encoded. |
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230 | * see argument 1 to Services_JSON() above for array-parsing behavior. |
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231 | * if var is a strng, note that encode() always expects it |
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232 | * to be in ASCII or UTF-8 format! |
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233 | * |
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234 | * @return mixed JSON string representation of input var or an error if a problem occurs |
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235 | * @access public |
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236 | */ |
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237 | function encode($var) |
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238 | { |
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239 | switch (gettype($var)) { |
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240 | case 'boolean': |
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241 | return $var ? 'true' : 'false'; |
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242 | |
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243 | case 'NULL': |
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244 | return 'null'; |
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245 | |
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246 | case 'integer': |
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247 | return (int) $var; |
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248 | |
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249 | case 'double': |
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250 | case 'float': |
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251 | return (float) $var; |
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252 | |
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253 | case 'string': |
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254 | // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT |
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255 | $ascii = ''; |
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256 | $strlen_var = strlen($var); |
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257 | |
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258 | /* |
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259 | * Iterate over every character in the string, |
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260 | * escaping with a slash or encoding to UTF-8 where necessary |
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261 | */ |
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262 | for ($c = 0; $c < $strlen_var; ++$c) { |
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263 | |
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264 | $ord_var_c = ord($var{$c}); |
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265 | |
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266 | switch (true) { |
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267 | case $ord_var_c == 0x08: |
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268 | $ascii .= '\b'; |
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269 | break; |
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270 | case $ord_var_c == 0x09: |
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271 | $ascii .= '\t'; |
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272 | break; |
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273 | case $ord_var_c == 0x0A: |
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274 | $ascii .= '\n'; |
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275 | break; |
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276 | case $ord_var_c == 0x0C: |
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277 | $ascii .= '\f'; |
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278 | break; |
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279 | case $ord_var_c == 0x0D: |
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280 | $ascii .= '\r'; |
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281 | break; |
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282 | |
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283 | case $ord_var_c == 0x22: |
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284 | case $ord_var_c == 0x2F: |
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285 | case $ord_var_c == 0x5C: |
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286 | // double quote, slash, slosh |
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287 | $ascii .= '\\'.$var{$c}; |
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288 | break; |
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289 | |
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290 | case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): |
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291 | // characters U-00000000 - U-0000007F (same as ASCII) |
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292 | $ascii .= $var{$c}; |
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293 | break; |
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294 | |
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295 | case (($ord_var_c & 0xE0) == 0xC0): |
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296 | // characters U-00000080 - U-000007FF, mask 110XXXXX |
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297 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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298 | $char = pack('C*', $ord_var_c, ord($var{$c + 1})); |
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299 | $c += 1; |
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300 | $utf16 = $this->utf82utf16($char); |
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301 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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302 | break; |
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303 | |
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304 | case (($ord_var_c & 0xF0) == 0xE0): |
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305 | // characters U-00000800 - U-0000FFFF, mask 1110XXXX |
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306 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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307 | $char = pack('C*', $ord_var_c, |
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308 | ord($var{$c + 1}), |
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309 | ord($var{$c + 2})); |
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310 | $c += 2; |
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311 | $utf16 = $this->utf82utf16($char); |
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312 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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313 | break; |
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314 | |
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315 | case (($ord_var_c & 0xF8) == 0xF0): |
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316 | // characters U-00010000 - U-001FFFFF, mask 11110XXX |
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317 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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318 | $char = pack('C*', $ord_var_c, |
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319 | ord($var{$c + 1}), |
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320 | ord($var{$c + 2}), |
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321 | ord($var{$c + 3})); |
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322 | $c += 3; |
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323 | $utf16 = $this->utf82utf16($char); |
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324 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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325 | break; |
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326 | |
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327 | case (($ord_var_c & 0xFC) == 0xF8): |
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328 | // characters U-00200000 - U-03FFFFFF, mask 111110XX |
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329 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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330 | $char = pack('C*', $ord_var_c, |
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331 | ord($var{$c + 1}), |
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332 | ord($var{$c + 2}), |
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333 | ord($var{$c + 3}), |
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334 | ord($var{$c + 4})); |
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335 | $c += 4; |
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336 | $utf16 = $this->utf82utf16($char); |
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337 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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338 | break; |
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339 | |
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340 | case (($ord_var_c & 0xFE) == 0xFC): |
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341 | // characters U-04000000 - U-7FFFFFFF, mask 1111110X |
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342 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
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343 | $char = pack('C*', $ord_var_c, |
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344 | ord($var{$c + 1}), |
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345 | ord($var{$c + 2}), |
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346 | ord($var{$c + 3}), |
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347 | ord($var{$c + 4}), |
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348 | ord($var{$c + 5})); |
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349 | $c += 5; |
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350 | $utf16 = $this->utf82utf16($char); |
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351 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
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352 | break; |
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353 | } |
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354 | } |
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355 | |
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356 | return '"'.$ascii.'"'; |
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357 | |
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358 | case 'array': |
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359 | /* |
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360 | * As per JSON spec if any array key is not an integer |
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361 | * we must treat the the whole array as an object. We |
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362 | * also try to catch a sparsely populated associative |
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363 | * array with numeric keys here because some JS engines |
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364 | * will create an array with empty indexes up to |
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365 | * max_index which can cause memory issues and because |
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366 | * the keys, which may be relevant, will be remapped |
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367 | * otherwise. |
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368 | * |
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369 | * As per the ECMA and JSON specification an object may |
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370 | * have any string as a property. Unfortunately due to |
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371 | * a hole in the ECMA specification if the key is a |
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372 | * ECMA reserved word or starts with a digit the |
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373 | * parameter is only accessible using ECMAScript's |
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374 | * bracket notation. |
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375 | */ |
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376 | |
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377 | // treat as a JSON object |
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378 | if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { |
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379 | $properties = array_map(array($this, 'name_value'), |
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380 | array_keys($var), |
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381 | array_values($var)); |
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382 | |
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383 | foreach($properties as $property) { |
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384 | if(Services_JSON::isError($property)) { |
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385 | return $property; |
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386 | } |
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387 | } |
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388 | |
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389 | return '{' . join(',', $properties) . '}'; |
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390 | } |
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391 | |
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392 | // treat it like a regular array |
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393 | $elements = array_map(array($this, 'encode'), $var); |
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394 | |
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395 | foreach($elements as $element) { |
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396 | if(Services_JSON::isError($element)) { |
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397 | return $element; |
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398 | } |
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399 | } |
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400 | |
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401 | return '[' . join(',', $elements) . ']'; |
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402 | |
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403 | case 'object': |
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404 | $vars = get_object_vars($var); |
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405 | |
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406 | $properties = array_map(array($this, 'name_value'), |
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407 | array_keys($vars), |
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408 | array_values($vars)); |
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409 | |
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410 | foreach($properties as $property) { |
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411 | if(Services_JSON::isError($property)) { |
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412 | return $property; |
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413 | } |
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414 | } |
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415 | |
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416 | return '{' . join(',', $properties) . '}'; |
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417 | |
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418 | default: |
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419 | return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) |
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420 | ? 'null' |
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421 | : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string"); |
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422 | } |
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423 | } |
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424 | |
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425 | /** |
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426 | * array-walking function for use in generating JSON-formatted name-value pairs |
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427 | * |
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428 | * @param string $name name of key to use |
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429 | * @param mixed $value reference to an array element to be encoded |
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430 | * |
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431 | * @return string JSON-formatted name-value pair, like '"name":value' |
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432 | * @access private |
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433 | */ |
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434 | function name_value($name, $value) |
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435 | { |
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436 | $encoded_value = $this->encode($value); |
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437 | |
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438 | if(Services_JSON::isError($encoded_value)) { |
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439 | return $encoded_value; |
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440 | } |
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441 | |
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442 | return $this->encode(strval($name)) . ':' . $encoded_value; |
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443 | } |
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444 | |
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445 | /** |
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446 | * reduce a string by removing leading and trailing comments and whitespace |
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447 | * |
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448 | * @param $str string string value to strip of comments and whitespace |
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449 | * |
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450 | * @return string string value stripped of comments and whitespace |
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451 | * @access private |
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452 | */ |
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453 | function reduce_string($str) |
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454 | { |
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455 | $str = preg_replace(array( |
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456 | |
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457 | // eliminate single line comments in '// ...' form |
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458 | '#^\s*//(.+)$#m', |
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459 | |
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460 | // eliminate multi-line comments in '/* ... */' form, at start of string |
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461 | '#^\s*/\*(.+)\*/#Us', |
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462 | |
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463 | // eliminate multi-line comments in '/* ... */' form, at end of string |
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464 | '#/\*(.+)\*/\s*$#Us' |
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465 | |
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466 | ), '', $str); |
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467 | |
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468 | // eliminate extraneous space |
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469 | return trim($str); |
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470 | } |
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471 | |
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472 | /** |
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473 | * decodes a JSON string into appropriate variable |
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474 | * |
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475 | * @param string $str JSON-formatted string |
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476 | * |
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477 | * @return mixed number, boolean, string, array, or object |
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478 | * corresponding to given JSON input string. |
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479 | * See argument 1 to Services_JSON() above for object-output behavior. |
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480 | * Note that decode() always returns strings |
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481 | * in ASCII or UTF-8 format! |
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482 | * @access public |
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483 | */ |
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484 | function decode($str) |
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485 | { |
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486 | $str = $this->reduce_string($str); |
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487 | |
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488 | switch (strtolower($str)) { |
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489 | case 'true': |
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490 | return true; |
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491 | |
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492 | case 'false': |
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493 | return false; |
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494 | |
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495 | case 'null': |
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496 | return null; |
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497 | |
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498 | default: |
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499 | $m = array(); |
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500 | |
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501 | if (is_numeric($str)) { |
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502 | // Lookie-loo, it's a number |
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503 | |
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504 | // This would work on its own, but I'm trying to be |
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505 | // good about returning integers where appropriate: |
---|
506 | // return (float)$str; |
---|
507 | |
---|
508 | // Return float or int, as appropriate |
---|
509 | return ((float)$str == (integer)$str) |
---|
510 | ? (integer)$str |
---|
511 | : (float)$str; |
---|
512 | |
---|
513 | } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { |
---|
514 | // STRINGS RETURNED IN UTF-8 FORMAT |
---|
515 | $delim = substr($str, 0, 1); |
---|
516 | $chrs = substr($str, 1, -1); |
---|
517 | $utf8 = ''; |
---|
518 | $strlen_chrs = strlen($chrs); |
---|
519 | |
---|
520 | for ($c = 0; $c < $strlen_chrs; ++$c) { |
---|
521 | |
---|
522 | $substr_chrs_c_2 = substr($chrs, $c, 2); |
---|
523 | $ord_chrs_c = ord($chrs{$c}); |
---|
524 | |
---|
525 | switch (true) { |
---|
526 | case $substr_chrs_c_2 == '\b': |
---|
527 | $utf8 .= chr(0x08); |
---|
528 | ++$c; |
---|
529 | break; |
---|
530 | case $substr_chrs_c_2 == '\t': |
---|
531 | $utf8 .= chr(0x09); |
---|
532 | ++$c; |
---|
533 | break; |
---|
534 | case $substr_chrs_c_2 == '\n': |
---|
535 | $utf8 .= chr(0x0A); |
---|
536 | ++$c; |
---|
537 | break; |
---|
538 | case $substr_chrs_c_2 == '\f': |
---|
539 | $utf8 .= chr(0x0C); |
---|
540 | ++$c; |
---|
541 | break; |
---|
542 | case $substr_chrs_c_2 == '\r': |
---|
543 | $utf8 .= chr(0x0D); |
---|
544 | ++$c; |
---|
545 | break; |
---|
546 | |
---|
547 | case $substr_chrs_c_2 == '\\"': |
---|
548 | case $substr_chrs_c_2 == '\\\'': |
---|
549 | case $substr_chrs_c_2 == '\\\\': |
---|
550 | case $substr_chrs_c_2 == '\\/': |
---|
551 | if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || |
---|
552 | ($delim == "'" && $substr_chrs_c_2 != '\\"')) { |
---|
553 | $utf8 .= $chrs{++$c}; |
---|
554 | } |
---|
555 | break; |
---|
556 | |
---|
557 | case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)): |
---|
558 | // single, escaped unicode character |
---|
559 | $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2))) |
---|
560 | . chr(hexdec(substr($chrs, ($c + 4), 2))); |
---|
561 | $utf8 .= $this->utf162utf8($utf16); |
---|
562 | $c += 5; |
---|
563 | break; |
---|
564 | |
---|
565 | case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): |
---|
566 | $utf8 .= $chrs{$c}; |
---|
567 | break; |
---|
568 | |
---|
569 | case ($ord_chrs_c & 0xE0) == 0xC0: |
---|
570 | // characters U-00000080 - U-000007FF, mask 110XXXXX |
---|
571 | //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
572 | $utf8 .= substr($chrs, $c, 2); |
---|
573 | ++$c; |
---|
574 | break; |
---|
575 | |
---|
576 | case ($ord_chrs_c & 0xF0) == 0xE0: |
---|
577 | // characters U-00000800 - U-0000FFFF, mask 1110XXXX |
---|
578 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
579 | $utf8 .= substr($chrs, $c, 3); |
---|
580 | $c += 2; |
---|
581 | break; |
---|
582 | |
---|
583 | case ($ord_chrs_c & 0xF8) == 0xF0: |
---|
584 | // characters U-00010000 - U-001FFFFF, mask 11110XXX |
---|
585 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
586 | $utf8 .= substr($chrs, $c, 4); |
---|
587 | $c += 3; |
---|
588 | break; |
---|
589 | |
---|
590 | case ($ord_chrs_c & 0xFC) == 0xF8: |
---|
591 | // characters U-00200000 - U-03FFFFFF, mask 111110XX |
---|
592 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
593 | $utf8 .= substr($chrs, $c, 5); |
---|
594 | $c += 4; |
---|
595 | break; |
---|
596 | |
---|
597 | case ($ord_chrs_c & 0xFE) == 0xFC: |
---|
598 | // characters U-04000000 - U-7FFFFFFF, mask 1111110X |
---|
599 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
600 | $utf8 .= substr($chrs, $c, 6); |
---|
601 | $c += 5; |
---|
602 | break; |
---|
603 | |
---|
604 | } |
---|
605 | |
---|
606 | } |
---|
607 | |
---|
608 | return $utf8; |
---|
609 | |
---|
610 | } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { |
---|
611 | // array, or object notation |
---|
612 | |
---|
613 | if ($str{0} == '[') { |
---|
614 | $stk = array(SERVICES_JSON_IN_ARR); |
---|
615 | $arr = array(); |
---|
616 | } else { |
---|
617 | if ($this->use & SERVICES_JSON_LOOSE_TYPE) { |
---|
618 | $stk = array(SERVICES_JSON_IN_OBJ); |
---|
619 | $obj = array(); |
---|
620 | } else { |
---|
621 | $stk = array(SERVICES_JSON_IN_OBJ); |
---|
622 | $obj = new stdClass(); |
---|
623 | } |
---|
624 | } |
---|
625 | |
---|
626 | array_push($stk, array('what' => SERVICES_JSON_SLICE, |
---|
627 | 'where' => 0, |
---|
628 | 'delim' => false)); |
---|
629 | |
---|
630 | $chrs = substr($str, 1, -1); |
---|
631 | $chrs = $this->reduce_string($chrs); |
---|
632 | |
---|
633 | if ($chrs == '') { |
---|
634 | if (reset($stk) == SERVICES_JSON_IN_ARR) { |
---|
635 | return $arr; |
---|
636 | |
---|
637 | } else { |
---|
638 | return $obj; |
---|
639 | |
---|
640 | } |
---|
641 | } |
---|
642 | |
---|
643 | //print("\nparsing {$chrs}\n"); |
---|
644 | |
---|
645 | $strlen_chrs = strlen($chrs); |
---|
646 | |
---|
647 | for ($c = 0; $c <= $strlen_chrs; ++$c) { |
---|
648 | |
---|
649 | $top = end($stk); |
---|
650 | $substr_chrs_c_2 = substr($chrs, $c, 2); |
---|
651 | |
---|
652 | if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { |
---|
653 | // found a comma that is not inside a string, array, etc., |
---|
654 | // OR we've reached the end of the character list |
---|
655 | $slice = substr($chrs, $top['where'], ($c - $top['where'])); |
---|
656 | array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); |
---|
657 | //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
658 | |
---|
659 | if (reset($stk) == SERVICES_JSON_IN_ARR) { |
---|
660 | // we are in an array, so just push an element onto the stack |
---|
661 | array_push($arr, $this->decode($slice)); |
---|
662 | |
---|
663 | } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { |
---|
664 | // we are in an object, so figure |
---|
665 | // out the property name and set an |
---|
666 | // element in an associative array, |
---|
667 | // for now |
---|
668 | $parts = array(); |
---|
669 | |
---|
670 | if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { |
---|
671 | // "name":value pair |
---|
672 | $key = $this->decode($parts[1]); |
---|
673 | $val = $this->decode($parts[2]); |
---|
674 | |
---|
675 | if ($this->use & SERVICES_JSON_LOOSE_TYPE) { |
---|
676 | $obj[$key] = $val; |
---|
677 | } else { |
---|
678 | $obj->$key = $val; |
---|
679 | } |
---|
680 | } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { |
---|
681 | // name:value pair, where name is unquoted |
---|
682 | $key = $parts[1]; |
---|
683 | $val = $this->decode($parts[2]); |
---|
684 | |
---|
685 | if ($this->use & SERVICES_JSON_LOOSE_TYPE) { |
---|
686 | $obj[$key] = $val; |
---|
687 | } else { |
---|
688 | $obj->$key = $val; |
---|
689 | } |
---|
690 | } |
---|
691 | |
---|
692 | } |
---|
693 | |
---|
694 | } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { |
---|
695 | // found a quote, and we are not inside a string |
---|
696 | array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c})); |
---|
697 | //print("Found start of string at {$c}\n"); |
---|
698 | |
---|
699 | } elseif (($chrs{$c} == $top['delim']) && |
---|
700 | ($top['what'] == SERVICES_JSON_IN_STR) && |
---|
701 | ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) { |
---|
702 | // found a quote, we're in a string, and it's not escaped |
---|
703 | // we know that it's not escaped becase there is _not_ an |
---|
704 | // odd number of backslashes at the end of the string so far |
---|
705 | array_pop($stk); |
---|
706 | //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); |
---|
707 | |
---|
708 | } elseif (($chrs{$c} == '[') && |
---|
709 | in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
---|
710 | // found a left-bracket, and we are in an array, object, or slice |
---|
711 | array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); |
---|
712 | //print("Found start of array at {$c}\n"); |
---|
713 | |
---|
714 | } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { |
---|
715 | // found a right-bracket, and we're in an array |
---|
716 | array_pop($stk); |
---|
717 | //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
718 | |
---|
719 | } elseif (($chrs{$c} == '{') && |
---|
720 | in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
---|
721 | // found a left-brace, and we are in an array, object, or slice |
---|
722 | array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); |
---|
723 | //print("Found start of object at {$c}\n"); |
---|
724 | |
---|
725 | } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { |
---|
726 | // found a right-brace, and we're in an object |
---|
727 | array_pop($stk); |
---|
728 | //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
729 | |
---|
730 | } elseif (($substr_chrs_c_2 == '/*') && |
---|
731 | in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
---|
732 | // found a comment start, and we are in an array, object, or slice |
---|
733 | array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); |
---|
734 | $c++; |
---|
735 | //print("Found start of comment at {$c}\n"); |
---|
736 | |
---|
737 | } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { |
---|
738 | // found a comment end, and we're in one now |
---|
739 | array_pop($stk); |
---|
740 | $c++; |
---|
741 | |
---|
742 | for ($i = $top['where']; $i <= $c; ++$i) |
---|
743 | $chrs = substr_replace($chrs, ' ', $i, 1); |
---|
744 | |
---|
745 | //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
746 | |
---|
747 | } |
---|
748 | |
---|
749 | } |
---|
750 | |
---|
751 | if (reset($stk) == SERVICES_JSON_IN_ARR) { |
---|
752 | return $arr; |
---|
753 | |
---|
754 | } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { |
---|
755 | return $obj; |
---|
756 | |
---|
757 | } |
---|
758 | |
---|
759 | } |
---|
760 | } |
---|
761 | } |
---|
762 | |
---|
763 | /** |
---|
764 | * @todo Ultimately, this should just call PEAR::isError() |
---|
765 | */ |
---|
766 | function isError($data, $code = null) |
---|
767 | { |
---|
768 | if (class_exists('pear')) { |
---|
769 | return PEAR::isError($data, $code); |
---|
770 | } elseif (is_object($data) && (get_class($data) == 'services_json_error' || |
---|
771 | is_subclass_of($data, 'services_json_error'))) { |
---|
772 | return true; |
---|
773 | } |
---|
774 | |
---|
775 | return false; |
---|
776 | } |
---|
777 | } |
---|
778 | |
---|
779 | if (class_exists('PEAR_Error')) { |
---|
780 | |
---|
781 | class Services_JSON_Error extends PEAR_Error |
---|
782 | { |
---|
783 | function Services_JSON_Error($message = 'unknown error', $code = null, |
---|
784 | $mode = null, $options = null, $userinfo = null) |
---|
785 | { |
---|
786 | parent::PEAR_Error($message, $code, $mode, $options, $userinfo); |
---|
787 | } |
---|
788 | } |
---|
789 | |
---|
790 | } else { |
---|
791 | |
---|
792 | /** |
---|
793 | * @todo Ultimately, this class shall be descended from PEAR_Error |
---|
794 | */ |
---|
795 | class Services_JSON_Error |
---|
796 | { |
---|
797 | function Services_JSON_Error($message = 'unknown error', $code = null, |
---|
798 | $mode = null, $options = null, $userinfo = null) |
---|
799 | { |
---|
800 | |
---|
801 | } |
---|
802 | } |
---|
803 | |
---|
804 | } |
---|
805 | |
---|
806 | ?> |
---|