std::string filename() const;
bool open(const std::string &filename, File::Mode mode);
- bool write(const void *buffer, int length);
- bool read(void *buffer, int length);
+ bool write(const void *buffer, size_t length);
+ bool read(void *buffer, size_t length);
void close();
void flush(void);
int getc();
+ bool skip(size_t length);
virtual bool supportsOffsets() const = 0;
virtual File::Offset currentOffset();
virtual void setCurrentOffset(const File::Offset &offset);
protected:
virtual bool rawOpen(const std::string &filename, File::Mode mode) = 0;
- virtual bool rawWrite(const void *buffer, int length) = 0;
- virtual bool rawRead(void *buffer, int length) = 0;
+ virtual bool rawWrite(const void *buffer, size_t length) = 0;
+ virtual bool rawRead(void *buffer, size_t length) = 0;
virtual int rawGetc() = 0;
virtual void rawClose() = 0;
virtual void rawFlush() = 0;
+ virtual bool rawSkip(size_t length) = 0;
protected:
std::string m_filename;
return m_isOpened;
}
-inline bool File::write(const void *buffer, int length)
+inline bool File::write(const void *buffer, size_t length)
{
if (!m_isOpened || m_mode != File::Write) {
return false;
return rawWrite(buffer, length);
}
-inline bool File::read(void *buffer, int length)
+inline bool File::read(void *buffer, size_t length)
{
if (!m_isOpened || m_mode != File::Read) {
return false;
inline void File::flush(void)
{
- rawFlush();
+ if (m_mode == File::Write) {
+ rawFlush();
+ }
}
inline int File::getc()
return rawGetc();
}
+inline bool File::skip(size_t length)
+{
+ if (!m_isOpened || m_mode != File::Read) {
+ return false;
+ }
+ return rawSkip(length);
+}
+
class ZLibFile : public File {
public:
ZLibFile(const std::string &filename = std::string(),
virtual bool supportsOffsets() const;
protected:
virtual bool rawOpen(const std::string &filename, File::Mode mode);
- virtual bool rawWrite(const void *buffer, int length);
- virtual bool rawRead(void *buffer, int length);
+ virtual bool rawWrite(const void *buffer, size_t length);
+ virtual bool rawRead(void *buffer, size_t length);
virtual int rawGetc();
virtual void rawClose();
virtual void rawFlush();
+ virtual bool rawSkip(size_t length);
private:
void *m_gzFile;
};
+inline bool
+operator<(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk < two.chunk ||
+ (one.chunk == two.chunk && one.offsetInChunk < two.offsetInChunk);
+}
+
+inline bool
+operator==(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk == two.chunk &&
+ one.offsetInChunk == two.offsetInChunk;
+}
+
+inline bool
+operator>=(const File::Offset &one, const File::Offset &two)
+{
+ return one.chunk > two.chunk ||
+ (one.chunk == two.chunk && one.offsetInChunk >= two.offsetInChunk);
+}
+
+inline bool
+operator>(const File::Offset &one, const File::Offset &two)
+{
+ return two < one;
+}
+
+inline bool
+operator<=(const File::Offset &one, const File::Offset &two)
+{
+ return two >= one;
+}
+
+
}
#endif