cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 1 | // This may look like C code, but it is really -*- C++ -*- |
| 2 | // |
| 3 | // Copyright Bob Friesenhahn, 1999, 2000, 2001, 2002, 2004 |
| 4 | // |
| 5 | // Implementation of Blob |
| 6 | // |
| 7 | |
| 8 | #define MAGICKCORE_IMPLEMENTATION 1 |
| 9 | #define MAGICK_PLUSPLUS_IMPLEMENTATION 1 |
| 10 | |
| 11 | #include "Magick++/Include.h" |
| 12 | #include "Magick++/Blob.h" |
| 13 | #include "Magick++/BlobRef.h" |
| 14 | |
| 15 | #include <string.h> |
| 16 | |
| 17 | // |
| 18 | // Implementation of Magick::Blob |
| 19 | // |
| 20 | |
| 21 | // Default constructor |
| 22 | Magick::Blob::Blob ( void ) |
| 23 | : _blobRef(new Magick::BlobRef( 0, 0 )) |
| 24 | { |
| 25 | } |
| 26 | |
| 27 | // Construct with data |
| 28 | Magick::Blob::Blob ( const void* data_, size_t length_ ) |
| 29 | : _blobRef(new Magick::BlobRef( data_, length_ )) |
| 30 | { |
| 31 | } |
| 32 | |
| 33 | // Copy constructor (reference counted) |
| 34 | Magick::Blob::Blob ( const Magick::Blob& blob_ ) |
| 35 | : _blobRef(blob_._blobRef) |
| 36 | { |
| 37 | // Increase reference count |
| 38 | Lock( &_blobRef->_mutexLock ); |
| 39 | ++_blobRef->_refCount; |
| 40 | } |
| 41 | |
| 42 | // Destructor (reference counted) |
| 43 | Magick::Blob::~Blob () |
| 44 | { |
| 45 | bool doDelete = false; |
| 46 | { |
| 47 | Lock( &_blobRef->_mutexLock ); |
| 48 | if ( --_blobRef->_refCount == 0 ) |
| 49 | doDelete = true; |
| 50 | } |
| 51 | |
| 52 | if ( doDelete ) |
| 53 | { |
| 54 | // Delete old blob reference with associated data |
| 55 | delete _blobRef; |
| 56 | } |
| 57 | _blobRef=0; |
| 58 | } |
| 59 | |
| 60 | // Assignment operator (reference counted) |
| 61 | Magick::Blob& Magick::Blob::operator= ( const Magick::Blob& blob_ ) |
| 62 | { |
| 63 | if(this != &blob_) |
| 64 | { |
| 65 | { |
| 66 | Lock( &blob_._blobRef->_mutexLock ); |
| 67 | ++blob_._blobRef->_refCount; |
| 68 | } |
| 69 | bool doDelete = false; |
| 70 | { |
| 71 | Lock( &_blobRef->_mutexLock ); |
| 72 | if ( --_blobRef->_refCount == 0 ) |
| 73 | doDelete = true; |
| 74 | } |
| 75 | if ( doDelete ) |
| 76 | { |
| 77 | delete _blobRef; |
| 78 | } |
| 79 | _blobRef = blob_._blobRef; |
| 80 | } |
| 81 | return *this; |
| 82 | } |
| 83 | |
| 84 | // Update object contents from Base64-encoded string representation. |
| 85 | void Magick::Blob::base64 ( const std::string base64_ ) |
| 86 | { |
| 87 | size_t length; |
| 88 | |
| 89 | unsigned char *decoded = |
| 90 | Base64Decode( base64_.c_str(), &length ); |
| 91 | |
| 92 | if(decoded) |
| 93 | updateNoCopy( static_cast<void*>(decoded), length, |
| 94 | Magick::Blob::MallocAllocator ); |
| 95 | } |
| 96 | |
| 97 | // Return Base64-encoded string representation. |
| 98 | std::string Magick::Blob::base64 ( void ) |
| 99 | { |
| 100 | size_t encoded_length = 0; |
| 101 | |
| 102 | char *encoded = |
| 103 | Base64Encode(static_cast<const unsigned char*>(data()), length(), &encoded_length); |
| 104 | |
| 105 | if(encoded) |
| 106 | { |
| 107 | std::string result(encoded,encoded_length); |
| 108 | encoded=(char *) RelinquishMagickMemory(encoded); |
| 109 | return result; |
| 110 | } |
| 111 | |
| 112 | return std::string(); |
| 113 | } |
| 114 | |
| 115 | // Update object contents, making a copy of the supplied data. |
| 116 | // Any existing data in the object is deallocated. |
| 117 | void Magick::Blob::update ( const void* data_, size_t length_ ) |
| 118 | { |
| 119 | bool doDelete = false; |
| 120 | { |
| 121 | Lock( &_blobRef->_mutexLock ); |
| 122 | if ( --_blobRef->_refCount == 0 ) |
| 123 | doDelete = true; |
| 124 | } |
| 125 | if ( doDelete ) |
| 126 | { |
| 127 | // Delete old blob reference with associated data |
| 128 | delete _blobRef; |
| 129 | } |
| 130 | |
| 131 | _blobRef = new Magick::BlobRef( data_, length_ ); |
| 132 | } |
| 133 | |
| 134 | // Update object contents, using supplied pointer directly (no copy) |
| 135 | // Any existing data in the object is deallocated. The user must |
| 136 | // ensure that the pointer supplied is not deleted or otherwise |
| 137 | // modified after it has been supplied to this method. |
| 138 | void Magick::Blob::updateNoCopy ( void* data_, size_t length_, |
| 139 | Magick::Blob::Allocator allocator_ ) |
| 140 | { |
| 141 | bool doDelete = false; |
| 142 | { |
| 143 | Lock( &_blobRef->_mutexLock ); |
| 144 | if ( --_blobRef->_refCount == 0 ) |
| 145 | doDelete = true; |
| 146 | } |
| 147 | if ( doDelete ) |
| 148 | { |
| 149 | // Delete old blob reference with associated data |
| 150 | delete _blobRef; |
| 151 | } |
| 152 | _blobRef = new Magick::BlobRef( 0, 0 ); |
| 153 | _blobRef->_data = data_; |
| 154 | _blobRef->_length = length_; |
| 155 | _blobRef->_allocator = allocator_; |
| 156 | } |
| 157 | |
| 158 | // Obtain pointer to data |
| 159 | const void* Magick::Blob::data( void ) const |
| 160 | { |
| 161 | return _blobRef->_data; |
| 162 | } |
| 163 | |
| 164 | // Obtain data length |
| 165 | size_t Magick::Blob::length( void ) const |
| 166 | { |
| 167 | return _blobRef->_length; |
| 168 | } |
| 169 | |