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/* Copyright 2019 Ján Sučan <jan@jansucan.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "file.h"
#include "print.h"
#include <errno.h>
#include <string.h>
size_t
file_size(FILE *const file, bool *const return_is_ok)
{
fpos_t p;
if ((fgetpos(file, &p) != 0) || (fseek(file, 0L, SEEK_END) != 0)) {
*return_is_ok = false;
return 0;
}
const long size = ftell(file);
if (fsetpos(file, &p) != 0) {
*return_is_ok = false;
return 0;
}
*return_is_ok = true;
return (size_t)size;
}
size_t
file_tell(FILE *const file, bool *const return_is_ok)
{
const long pos = ftell(file);
if (pos < 0) {
*return_is_ok = false;
return 0;
} else {
*return_is_ok = true;
return (size_t)pos;
}
}
size_t
file_read_sectors(FILE *const file, char *const buffer, uint32_t buffer_size,
uint32_t sector_size)
{
const size_t bytes_read = fread(buffer, 1U, buffer_size, file);
if (ferror(file)) {
print_error("cannot read from file: %s", strerror(errno));
return 0;
} else if ((bytes_read % sector_size) != 0) {
print_error("data read from input file is not multiple of sector size");
return 0;
} else {
return (bytes_read / sector_size);
}
}
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