diff options
Diffstat (limited to 'common/substream.h')
| -rw-r--r-- | common/substream.h | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/common/substream.h b/common/substream.h index dc49ce9ecf..8b83dbda2e 100644 --- a/common/substream.h +++ b/common/substream.h @@ -27,6 +27,7 @@ #define COMMON_SUBSTREAM_H #include "common/stream.h" +#include "common/types.h" namespace Common { @@ -59,7 +60,7 @@ public: delete _parentStream; } - virtual bool eos() const { return _eos; } + virtual bool eos() const { return _eos | _parentStream->eos(); } virtual bool err() const { return _parentStream->err(); } virtual void clearErr() { _eos = false; _parentStream->clearErr(); } virtual uint32 read(void *dataPtr, uint32 dataSize); @@ -101,6 +102,25 @@ public: } }; +/** + * A seekable substream that removes the exclusivity demand required by the + * normal SeekableSubReadStream, at the cost of seek()ing the parent stream + * before each read(). + * + * More than one SafeSubReadStream to the same parent stream can be used + * at the same time; they won't mess up each other. They will, however, + * reposition the parent stream, so don't depend on its position to be + * the same after a read() or seek() on one of its SafeSubReadStream. + */ +class SafeSubReadStream : public SeekableSubReadStream { +public: + SafeSubReadStream(SeekableReadStream *parentStream, uint32 begin, uint32 end, DisposeAfterUse::Flag disposeParentStream = DisposeAfterUse::NO) : + SeekableSubReadStream(parentStream, begin, end, disposeParentStream) { + } + + virtual uint32 read(void *dataPtr, uint32 dataSize); +}; + } // End of namespace Common |