diff options
| -rw-r--r-- | common/stream.cpp | 25 | ||||
| -rw-r--r-- | common/stream.h | 2 |
2 files changed, 27 insertions, 0 deletions
diff --git a/common/stream.cpp b/common/stream.cpp index 6737eafc9c..204efd79b9 100644 --- a/common/stream.cpp +++ b/common/stream.cpp @@ -303,4 +303,29 @@ bool BufferedSeekableReadStream::seek(int32 offset, int whence) { return true; // FIXME: STREAM REWRITE } +bool MemoryWriteStreamDynamic::seek(int32 offs, int whence) { + // Pre-Condition + assert(_pos <= _size); + switch (whence) { + case SEEK_END: + // SEEK_END works just like SEEK_SET, only 'reversed', + // i.e. from the end. + offs = _size + offs; + // Fall through + case SEEK_SET: + _ptr = _data + offs; + _pos = offs; + break; + + case SEEK_CUR: + _ptr += offs; + _pos += offs; + break; + } + // Post-Condition + assert(_pos <= _size); + + return true; // FIXME: STREAM REWRITE +} + } // End of namespace Common diff --git a/common/stream.h b/common/stream.h index 11041fa3ce..5e0d7149b0 100644 --- a/common/stream.h +++ b/common/stream.h @@ -687,6 +687,8 @@ public: uint32 size() const { return _size; } byte *getData() { return _data; } + + bool seek(int32 offset, int whence = SEEK_SET); }; } // End of namespace Common |