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/**
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 * @file
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 * @brief File descriptor (fd) abstraction over FILE *
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 * @details Provide POSIX kernel support to operate with flides (int)
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 * instead of FILE *. Rewritten from old VFS.
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 * @date 20.05.15
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 * @author Anton Kozlov
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 * @author Denis Deryugin
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 */
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#include <assert.h>
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#include <errno.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <fs/kfile.h>
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#include <kernel/task/resource/idesc.h>
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extern const struct idesc_ops idesc_file_ops;
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static void idesc_file_ops_close(struct idesc *idesc) {
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	assert(idesc);
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	kclose((struct file_desc *)idesc);
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}
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static ssize_t idesc_file_ops_read(struct idesc *idesc, const struct iovec *iov,
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    int cnt) {
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	void *buf;
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	size_t nbyte;
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	assert(idesc);
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	assert(idesc->idesc_ops == &idesc_file_ops);
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	assert(iov);
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	assert(cnt == 1);
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	buf = iov->iov_base;
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	nbyte = iov->iov_len;
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	return kread((struct file_desc *)idesc, buf, nbyte);
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}
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static ssize_t idesc_file_ops_write(struct idesc *idesc,
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    const struct iovec *iov, int cnt) {
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	void *buf;
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	size_t nbyte;
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	assert(idesc);
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	assert(idesc->idesc_ops == &idesc_file_ops);
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	assert(iov);
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	assert(cnt == 1);
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	buf = iov->iov_base;
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	nbyte = iov->iov_len;
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	return kwrite((struct file_desc *)idesc, (char *)buf, nbyte);
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}
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static int idesc_file_ops_stat(struct idesc *idesc, struct stat *stat) {
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	assert(idesc);
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	assert(idesc->idesc_ops == &idesc_file_ops);
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	return kfstat((struct file_desc *)idesc, stat);
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}
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static int idesc_file_ops_ioctl(struct idesc *idesc, int request, void *data) {
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	assert(idesc);
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	assert(idesc->idesc_ops == &idesc_file_ops);
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	return kioctl((struct file_desc *)idesc, request, data);
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}
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static int idesc_file_ops_status(struct idesc *idesc, int mask) {
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	assert(idesc);
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	assert(idesc->idesc_ops == &idesc_file_ops);
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	return 1;
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}
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const struct idesc_ops idesc_file_ops = {
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    .close = idesc_file_ops_close,
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    .id_readv = idesc_file_ops_read,
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    .id_writev = idesc_file_ops_write,
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    .ioctl = idesc_file_ops_ioctl,
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    .fstat = idesc_file_ops_stat,
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    .status = idesc_file_ops_status,
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};
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