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annotate utils.c @ 74:e06376295170

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JS exceptions thrown out to Python now include the wrapped original exception. This fixes a TODO.
author Atul Varma <varmaa@toolness.com>
date Wed, 29 Jul 2009 20:43:46 -0700
parents c2972e58fbb6
children 4b1149d818e8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
48
bc4263c6ae82 Added license blocks to all .c/.h files.
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1 /* ***** BEGIN LICENSE BLOCK *****
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2 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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3 *
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4 * The contents of this file are subject to the Mozilla Public License Version
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5 * 1.1 (the "License"); you may not use this file except in compliance with
bc4263c6ae82 Added license blocks to all .c/.h files.
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6 * the License. You may obtain a copy of the License at
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7 * http://www.mozilla.org/MPL/
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8 *
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9 * Software distributed under the License is distributed on an "AS IS" basis,
bc4263c6ae82 Added license blocks to all .c/.h files.
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10 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
bc4263c6ae82 Added license blocks to all .c/.h files.
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11 * for the specific language governing rights and limitations under the
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12 * License.
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13 *
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14 * The Original Code is Pymonkey.
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15 *
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16 * The Initial Developer of the Original Code is Mozilla.
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17 * Portions created by the Initial Developer are Copyright (C) 2007
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18 * the Initial Developer. All Rights Reserved.
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19 *
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20 * Contributor(s):
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21 * Atul Varma <atul@mozilla.com>
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22 *
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23 * Alternatively, the contents of this file may be used under the terms of
bc4263c6ae82 Added license blocks to all .c/.h files.
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24 * either the GNU General Public License Version 2 or later (the "GPL"), or
bc4263c6ae82 Added license blocks to all .c/.h files.
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25 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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26 * in which case the provisions of the GPL or the LGPL are applicable instead
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27 * of those above. If you wish to allow use of your version of this file only
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28 * under the terms of either the GPL or the LGPL, and not to allow others to
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29 * use your version of this file under the terms of the MPL, indicate your
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30 * decision by deleting the provisions above and replace them with the notice
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31 * and other provisions required by the GPL or the LGPL. If you do not delete
bc4263c6ae82 Added license blocks to all .c/.h files.
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32 * the provisions above, a recipient may use your version of this file under
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33 * the terms of any one of the MPL, the GPL or the LGPL.
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34 *
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35 * ***** END LICENSE BLOCK ***** */
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36
11
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37 #include "utils.h"
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38 #include "undefined.h"
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39 #include "object.h"
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40
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41 PyObject *PYM_error;
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42
33
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43 static int
44
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44 PYM_doubleToJsval(PYM_JSContextObject *context,
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45 double number,
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46 jsval *rval)
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47 {
44
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48 jsdouble *numberAsJsdouble = JS_NewDouble(context->cx, number);
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49 if (numberAsJsdouble == NULL) {
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50 PyErr_SetString(PYM_error, "JS_NewDouble() failed");
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51 return -1;
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52 }
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53 *rval = DOUBLE_TO_JSVAL(numberAsJsdouble);
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54 return 0;
32
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55 }
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56
33
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57 int
44
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58 PYM_pyObjectToJsval(PYM_JSContextObject *context,
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59 PyObject *object,
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60 jsval *rval)
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61 {
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62 #ifndef Py_UNICODE_WIDE
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63 if (PyUnicode_Check(object)) {
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64 Py_UNICODE *string = PyUnicode_AsUnicode(object);
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65 JSString *jsString = JS_NewUCStringCopyZ(context->cx,
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66 (const jschar *) string);
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67 if (jsString == NULL) {
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68 PyErr_SetString(PYM_error, "JS_NewUCStringCopyZ() failed");
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69 return -1;
29
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70 }
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71
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72 *rval = STRING_TO_JSVAL(jsString);
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73 return 0;
29
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74 }
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75 #endif
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76
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d0a3f358072a gcc now shows all warnings (-Wall).
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77 if (PyInt_Check(object)) {
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78 long number = PyInt_AS_LONG(object);
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79 if (INT_FITS_IN_JSVAL(number)) {
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80 *rval = INT_TO_JSVAL(number);
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81 return 0;
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82 } else
44
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83 return PYM_doubleToJsval(context, number, rval);
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84 }
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85
32
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86 if (PyFloat_Check(object))
44
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87 return PYM_doubleToJsval(context, PyFloat_AS_DOUBLE(object), rval);
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88
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89 if (PyObject_TypeCheck(object, &PYM_JSObjectType)) {
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90 PYM_JSObject *jsObject = (PYM_JSObject *) object;
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91 JSRuntime *rt = JS_GetRuntime(context->cx);
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92 if (rt != jsObject->runtime->rt) {
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93 PyErr_SetString(PyExc_ValueError,
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94 "JS object and JS context are from different "
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95 "JS runtimes");
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96 return -1;
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97 }
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98 *rval = OBJECT_TO_JSVAL(jsObject->obj);
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99 return 0;
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100 }
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101
34
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102 if (object == Py_True) {
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103 *rval = JSVAL_TRUE;
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104 return 0;
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105 }
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106
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107 if (object == Py_False) {
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108 *rval = JSVAL_FALSE;
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109 return 0;
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110 }
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111
45
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112 if (object == Py_None) {
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113 *rval = JSVAL_NULL;
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114 return 0;
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115 }
03aec8572461 Python-wrapped JS functions can now return null/None.
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116
29
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117 // TODO: Support more types.
30
3b2bdf2823bb Changed PYM_pyObjectToJsval() to assume the caller is in Python-space for consistency.
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118 PyErr_SetString(PyExc_NotImplementedError,
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119 "Data type conversion not implemented.");
33
3f8a2db496f5 Changed PYM_pyObjectToJsval() to simply return an int status/error code; this way callers don't have to worry about decreasing the reference count of a Py_NONE.
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120 return -1;
29
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121 }
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122
11
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123 PyObject *
21
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124 PYM_jsvalToPyObject(PYM_JSContextObject *context,
20
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125 jsval value) {
11
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126 if (JSVAL_IS_INT(value))
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127 return PyInt_FromLong(JSVAL_TO_INT(value));
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128
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129 if (JSVAL_IS_DOUBLE(value)) {
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130 jsdouble *doubleRef = JSVAL_TO_DOUBLE(value);
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131 return PyFloat_FromDouble(*doubleRef);
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132 }
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133
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134 if (value == JSVAL_FALSE)
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135 Py_RETURN_FALSE;
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136
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137 if (value == JSVAL_TRUE)
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138 Py_RETURN_TRUE;
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139
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140 if (JSVAL_IS_NULL(value))
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141 Py_RETURN_NONE;
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142
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143 if (JSVAL_IS_VOID(value))
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144 Py_RETURN_UNDEFINED;
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145
27
21045074139f Based on my new understanding of JSString */jschar * thanks to folks on #jsapi, I've removed the requirement that SpiderMonkey be in UTF-8 mode to translate strings between Python and SpiderMonkey.
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146 if (JSVAL_IS_STRING(value)) {
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147 // Strings in JS are funky: think of them as 16-bit versions of
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148 // Python 2.x's 'str' type. Whether or not they're valid UTF-16
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149 // is entirely up to the client code.
11
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150
27
21045074139f Based on my new understanding of JSString */jschar * thanks to folks on #jsapi, I've removed the requirement that SpiderMonkey be in UTF-8 mode to translate strings between Python and SpiderMonkey.
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parents: 21
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151 // TODO: Instead of ignoring errors, consider actually treating
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152 // the string as a raw character buffer.
11
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153 JSString *str = JSVAL_TO_STRING(value);
27
21045074139f Based on my new understanding of JSString */jschar * thanks to folks on #jsapi, I've removed the requirement that SpiderMonkey be in UTF-8 mode to translate strings between Python and SpiderMonkey.
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154 const char *chars = (const char *) JS_GetStringChars(str);
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155 size_t length = JS_GetStringLength(str);
21045074139f Based on my new understanding of JSString */jschar * thanks to folks on #jsapi, I've removed the requirement that SpiderMonkey be in UTF-8 mode to translate strings between Python and SpiderMonkey.
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parents: 21
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156
21045074139f Based on my new understanding of JSString */jschar * thanks to folks on #jsapi, I've removed the requirement that SpiderMonkey be in UTF-8 mode to translate strings between Python and SpiderMonkey.
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157 // We're multiplying length by two since Python wants the number
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158 // of bytes, not the number of 16-bit characters.
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159 return PyUnicode_DecodeUTF16(chars, length * 2, "ignore", NULL);
11
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160 }
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161
20
abede8af8cf5 PYM_jsvalToPyObject() can now deal with JSObjects.
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162 if (JSVAL_IS_OBJECT(value))
37
d4efcbb06964 Added a new PYM_JSFunction type, PYM_JSContext.define_property(), and PYM_JSContext.new_function(). Also fixed a memory leak.
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163 return (PyObject *) PYM_newJSObject(context, JSVAL_TO_OBJECT(value),
d4efcbb06964 Added a new PYM_JSFunction type, PYM_JSContext.define_property(), and PYM_JSContext.new_function(). Also fixed a memory leak.
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diff changeset
164 NULL);
20
abede8af8cf5 PYM_jsvalToPyObject() can now deal with JSObjects.
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165
11
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166 // TODO: Support more types.
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167 PyErr_SetString(PyExc_NotImplementedError,
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168 "Data type conversion not implemented.");
29
608d086d12e3 Added a new PYM_pyObjectToJsval() function that only supports unicode for the moment. Also, whereever we're assuming that Py_UNICODE is UCS-2, we're surrounding such code with #ifndef Py_UNICODE_WIDE.
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169 return NULL;
11
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170 }
46
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171
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172 void
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173 PYM_pythonExceptionToJs(PYM_JSContextObject *context)
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174 {
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175 PyObject *type;
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176 PyObject *value;
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177 PyObject *traceback;
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178
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179 PyErr_Fetch(&type, &value, &traceback);
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180 PyObject *str = PyObject_Unicode(value);
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181 if (str == NULL)
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182 JS_ReportError(context->cx, "Python exception occurred");
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183 else {
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184 jsval val;
47
3f4982759e55 Converting JS exceptions into Python exceptions is now doable, albeit not yet implemented, thanks to the discovery of JSOPTION_DONT_REPORT_UNCAUGHT. Also, JS warnings are now converted into Python warnings.
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185 if (PYM_pyObjectToJsval(context, str, &val) == 0) {
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186 // TODO: Wrap Python traceback info in JS exception so the client
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187 // can examine it.
46
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188 JS_SetPendingException(context->cx, val);
47
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189 } else
46
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190 JS_ReportError(context->cx, "Python exception occurred");
52
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191 Py_DECREF(str);
46
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192 }
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193
52
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194 Py_XDECREF(type);
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195 Py_XDECREF(value);
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196 Py_XDECREF(traceback);
46
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197 }
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198
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199 void
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200 PYM_jsExceptionToPython(PYM_JSContextObject *context)
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201 {
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202 if (!JS_IsExceptionPending(context->cx) &&
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203 PyErr_Occurred())
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diff changeset
204 return;
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205
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206 jsval val;
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207 if (JS_GetPendingException(context->cx, &val)) {
74
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208 PyObject *obj = PYM_jsvalToPyObject(context, val);
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diff changeset
209 if (obj) {
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210 PyErr_SetObject(PYM_error, obj);
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211 Py_DECREF(obj);
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diff changeset
212 } else {
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213 PyErr_Clear();
69
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diff changeset
214
74
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215 JSString *str = NULL;
69
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diff changeset
216
74
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217 Py_BEGIN_ALLOW_THREADS;
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218 str = JS_ValueToString(context->cx, val);
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219 Py_END_ALLOW_THREADS;
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diff changeset
220
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221 if (str != NULL) {
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diff changeset
222 const char *chars = JS_GetStringBytes(str);
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223 PyErr_SetString(PYM_error, chars);
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224 } else
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225 PyErr_SetString(PYM_error, "JS exception occurred");
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226 }
46
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227 } else
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228 PyErr_SetString(PYM_error, "JS_GetPendingException() failed");
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229 }