diff options
Diffstat (limited to 'include/iprt/sg.h')
| -rw-r--r-- | include/iprt/sg.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/include/iprt/sg.h b/include/iprt/sg.h index d515de8b..d7083bbd 100644 --- a/include/iprt/sg.h +++ b/include/iprt/sg.h @@ -3,7 +3,7 @@ */ /* - * Copyright (C) 2010 Oracle Corporation + * Copyright (C) 2010-2013 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; @@ -187,12 +187,12 @@ RTDECL(size_t) RTSgBufCopyToBuf(PRTSGBUF pSgBuf, void *pvBuf, size_t cbCopy); * * @returns Number of bytes copied. * @param pSgBuf The S/G buffer to copy to. - * @param pvBuf Buffer to copy the data into. + * @param pvBuf Buffer to copy the data from. * @param cbCopy How many bytes to copy. * * @note This operation advances the internal buffer pointer of the S/G buffer. */ -RTDECL(size_t) RTSgBufCopyFromBuf(PRTSGBUF pSgBuf, void *pvBuf, size_t cbCopy); +RTDECL(size_t) RTSgBufCopyFromBuf(PRTSGBUF pSgBuf, const void *pvBuf, size_t cbCopy); /** * Advances the internal buffer pointer. @@ -221,6 +221,17 @@ RTDECL(size_t) RTSgBufAdvance(PRTSGBUF pSgBuf, size_t cbAdvance); RTDECL(size_t) RTSgBufSegArrayCreate(PRTSGBUF pSgBuf, PRTSGSEG paSeg, unsigned *pcSeg, size_t cbData); /** + * Returns whether the given S/G buffer is zeroed out from the current position + * upto the number of bytes to check. + * + * @returns true if the buffer has only zeros + * false otherwise. + * @param pSgBuf The S/G buffer. + * @param cbCheck Number of bytes to check. + */ +RTDECL(bool) RTSgBufIsZero(PRTSGBUF pSgBuf, size_t cbCheck); + +/** * Maps the given S/G buffer to a segment array of another type (for example to * iovec on POSIX or WSABUF on Windows). * |