iov header

The documentation of QEMU’s qemu/iov.h header.

size_t iov_size(const struct iovec * iov, const unsigned int iov_cnt)

Parameters

const struct iovec * iov

undescribed

const unsigned int iov_cnt

undescribed

Description

starting at `iov’ of `iov_cnt’ number of elements.

size_t iov_from_buf_full(const struct iovec * iov, unsigned int iov_cnt, size_t offset, const void * buf, size_t bytes)

gather vector of buffers (iovec) and back like memcpy() between two continuous memory regions. Data in single continuous buffer starting at address `buf’ and `bytes’ bytes long will be copied to/from an iovec `iov’ with `iov_cnt’ number of elements, starting at byte position `offset’ within the iovec. If the iovec does not contain enough space, only part of data will be copied, up to the end of the iovec. Number of bytes actually copied will be returned, which is min(bytes, iov_size(iov)-offset) `Offset’ must point to the inside of iovec.

Parameters

const struct iovec * iov

undescribed

unsigned int iov_cnt

undescribed

size_t offset

undescribed

const void * buf

undescribed

size_t bytes

undescribed

size_t iov_memset(const struct iovec * iov, const unsigned int iov_cnt, size_t offset, int fillc, size_t bytes)

Parameters

const struct iovec * iov

undescribed

const unsigned int iov_cnt

undescribed

size_t offset

undescribed

int fillc

undescribed

size_t bytes

undescribed

Description

starting at byte offset `start’, to value `fillc’, repeating it `bytes’ number of times. `Offset’ must point to the inside of iovec. If `bytes’ is large enough, only last bytes portion of iovec, up to the end of it, will be filled with the specified value. Function return actual number of bytes processed, which is min(size, iov_size(iov) - offset).

void iov_hexdump(const struct iovec * iov, const unsigned int iov_cnt, FILE * fp, const char * prefix, size_t limit)

Parameters

const struct iovec * iov

undescribed

const unsigned int iov_cnt

undescribed

FILE * fp

undescribed

const char * prefix

undescribed

size_t limit

undescribed

Description

in file `fp’, prefixing each line with `prefix’ and processing not more than `limit’ data bytes.