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/*
Copyright (C) 2015-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/
/*
WARNING: This file was generated by the dkct program (see
http://dktools.sourceforge.net/ for details).
Changes you make here will be lost if dkct is run again!
You should modify the original source and run dkct on it.
Original source: dk4fdrda.ctr
*/
/** @file dk4fdrda.c The dk4fdrda module.
*/
#line 55 "dk4fdrda.ctr"
#include "dk4conf.h"
#include "dk4fdrda.h"
#include "dk4fdrde.h"
#if DK4_HAVE_UNISTD_H
#ifndef UNISTD_H_INCLUDED
#include <unistd.h>
#define UNISTD_H_INCLUDED 1
#endif
#endif
#if DK4_HAVE_ERRNO_H
#ifndef ERRNO_H_INCLUDED
#include <errno.h>
#define ERRNO_H_INCLUDED 1
#endif
#endif
#if DK4_HAVE_IO_H
#ifndef IO_H_INCLUDED
#include <io.h>
#define IO_H_INCLUDED 1
#endif
#endif
#line 84 "dk4fdrda.ctr"
#ifdef RW_MAX
#undef RW_MAX
#endif
#if DK4_ON_WINDOWS
/** Maximum number of bytes for read or write operation.
*/
#define RW_MAX (INT_MAX)
#else
/** Maximum number of bytes for read or write operation.
*/
#define RW_MAX ((SIZE_MAX) / 2U)
#endif
int
dk4fd_read_app(
int fd, void *buffer, size_t *psz, const dkChar *fn, dk4_app_t *app
)
{
#if DK4_ON_WINDOWS
int res;
#else
ssize_t res;
#endif
int back = 0;
#line 114 "dk4fdrda.ctr"
if ((-1 != fd) && (NULL != buffer) && (NULL != psz)) {
if (0 < *psz) {
if ((dk4_um_t)RW_MAX >= (dk4_um_t)(*psz)) {
errno = 0;
#if DK4_ON_WINDOWS
res = _read(fd, buffer, (unsigned)(*psz));
#else
res = read(fd, buffer, *psz);
#endif
if (0 <= res) {
if (0 < res) {
#line 125 "dk4fdrda.ctr"
back = 1;
*psz = (size_t)res;
} else {
#line 128 "dk4fdrda.ctr"
back = 1;
*psz = (size_t)0;
}
} else {
#line 132 "dk4fdrda.ctr"
dk4fd_read_error_msg(app, fn, errno);
}
}
} else {
#line 136 "dk4fdrda.ctr"
}
} else {
#line 138 "dk4fdrda.ctr"
}
#line 139 "dk4fdrda.ctr"
return back;
}
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