1 New in SVN 2 ---------- 3 4 * Updated the type system's behavior, in order to better support backwards 5 compatibility with code that was written before 64-bit integer support was 6 introduced. Here's how it works now: 7 8 * isInt, isInt64, isUInt, and isUInt64 return true if and only if the 9 value can be exactly represented as that type. In particular, a value 10 constructed with a double like 17.0 will now return true for all of 11 these methods. 12 13 * isDouble and isFloat now return true for all numeric values, since all 14 numeric values can be converted to a double or float without 15 truncation. Note however that the conversion may not be exact -- for 16 example, doubles cannot exactly represent all integers above 2^53 + 1. 17 18 * isBool, isNull, isString, isArray, and isObject now return true if and 19 only if the value is of that type. 20 21 * isConvertibleTo(fooValue) indicates that it is safe to call asFoo. 22 (For each type foo, isFoo always implies isConvertibleTo(fooValue).) 23 asFoo returns an approximate or exact representation as appropriate. 24 For example, a double value may be truncated when asInt is called. 25 26 * For backwards compatibility with old code, isConvertibleTo(intValue) 27 may return false even if type() == intValue. This is because the value 28 may have been constructed with a 64-bit integer larger than maxInt, 29 and calling asInt() would cause an exception. If you're writing new 30 code, use isInt64 to find out whether the value is exactly 31 representable using an Int64, or asDouble() combined with minInt64 and 32 maxInt64 to figure out whether it is approximately representable. 33 34 35 New in JsonCpp 0.6.0: 36 --------------------- 37 38 * Compilation 39 40 - LD_LIBRARY_PATH and LIBRARY_PATH environment variables are now 41 propagated to the build environment as this is required for some 42 compiler installation. 43 44 - Added support for Microsoft Visual Studio 2008 (bug #2930462): 45 The platform "msvc90" has been added. 46 47 Notes: you need to setup the environment by running vcvars32.bat 48 (e.g. MSVC 2008 command prompt in start menu) before running scons. 49 50 - Added support for amalgamated source and header generation (a la sqlite). 51 Refer to README.txt section "Generating amalgamated source and header" 52 for detail. 53 54 * Value 55 56 - Removed experimental ValueAllocator, it caused static 57 initialization/destruction order issues (bug #2934500). 58 The DefaultValueAllocator has been inlined in code. 59 60 - Added support for 64 bits integer: 61 62 Types Json::Int64 and Json::UInt64 have been added. They are aliased 63 to 64 bits integers on system that support them (based on __int64 on 64 Microsoft Visual Studio platform, and long long on other platforms). 65 66 Types Json::LargestInt and Json::LargestUInt have been added. They are 67 aliased to the largest integer type supported: 68 either Json::Int/Json::UInt or Json::Int64/Json::UInt64 respectively. 69 70 Json::Value::asInt() and Json::Value::asUInt() still returns plain 71 "int" based types, but asserts if an attempt is made to retrieve 72 a 64 bits value that can not represented as the return type. 73 74 Json::Value::asInt64() and Json::Value::asUInt64() have been added 75 to obtain the 64 bits integer value. 76 77 Json::Value::asLargestInt() and Json::Value::asLargestUInt() returns 78 the integer as a LargestInt/LargestUInt respectively. Those functions 79 functions are typically used when implementing writer. 80 81 The reader attempts to read number as 64 bits integer, and fall back 82 to reading a double if the number is not in the range of 64 bits 83 integer. 84 85 Warning: Json::Value::asInt() and Json::Value::asUInt() now returns 86 long long. This changes break code that was passing the return value 87 to *printf() function. 88 89 Support for 64 bits integer can be disabled by defining the macro 90 JSON_NO_INT64 (uncomment it in json/config.h for example), though 91 it should have no impact on existing usage. 92 93 - The type Json::ArrayIndex is used for indexes of a JSON value array. It 94 is an unsigned int (typically 32 bits). 95 96 - Array index can be passed as int to operator[], allowing use of literal: 97 Json::Value array; 98 array.append( 1234 ); 99 int value = array[0].asInt(); // did not compile previously 100 101 - Added float Json::Value::asFloat() to obtain a floating point value as a 102 float (avoid lost of precision warning caused by used of asDouble() 103 to initialize a float). 104 105 * Reader 106 107 - Renamed Reader::getFormatedErrorMessages() to getFormattedErrorMessages. 108 Bug #3023708 (Formatted has 2 't'). The old member function is deprecated 109 but still present for backward compatibility. 110 111 * Tests 112 113 - Added test to ensure that the escape sequence "\/" is corrected handled 114 by the parser. 115 116 * Bug fixes 117 118 - Bug #3139677: JSON [1 2 3] was incorrectly parsed as [1, 3]. Error is now 119 correctly detected. 120 121 - Bug #3139678: stack buffer overflow when parsing a double with a 122 length of 32 characters. 123 124 - Fixed Value::operator <= implementation (had the semantic of operator >=). 125 Found when adding unit tests for comparison operators. 126 127 - Value::compare() is now const and has an actual implementation with 128 unit tests. 129 130 - Bug #2407932: strpbrk() can fail for NULL pointer. 131 132 - Bug #3306345: Fixed minor typo in Path::resolve(). 133 134 - Bug #3314841/#3306896: errors in amalgamate.py 135 136 - Fixed some Coverity warnings and line-endings. 137 138 * License 139 140 - See file LICENSE for details. Basically JsonCpp is now licensed under 141 MIT license, or public domain if desired and recognized in your jurisdiction. 142 Thanks to Stephan G. Beal [http://wanderinghorse.net/home/stephan/]) who 143 helped figuring out the solution to the public domain issue. 144
