48     virtual size_t idealAllocSize(size_t len) {  in idealAllocSize()  argument
49         return m_bufsize < len ? len : m_bufsize;  in idealAllocSize()
54     virtual const unsigned char *readFully( void *buf, size_t len) = 0;
55     virtual const unsigned char *commitBufferAndReadFully(size_t size, void *buf, size_t len) = 0;
57     virtual int writeFully(const void* buf, size_t len) = 0;
58     virtual int writeFullyAsync(const void* buf, size_t len) {  in writeFullyAsync()  argument
59         return writeFully(buf, len);  in writeFullyAsync()
67     virtual unsigned char *alloc(size_t len) {  in alloc()  argument
69         if (m_iostreamBuf && len > m_free) {  in alloc()
76         if (!m_iostreamBuf || len > m_bufsize) {  in alloc()
77             int allocLen = this->idealAllocSize(len);  in alloc()
89         m_free -= len;  in alloc()
104     const unsigned char *readback(void *buf, size_t len) {  in readback()  argument
109             return commitBufferAndReadFully(size, buf, len);  in readback()
111         return readFully(buf, len);  in readback()