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/*
Copyright (C) 2025 Mikael Hildenborg
SPDX-License-Identifier: BSD-2-Clause
*/
#include <unistd.h>
#include <_ansi.h>
#include "atari-gem_errno.h"
#include "atari-traps.h"
off_t lseek(int fd, off_t offset, int whence)
{
int newoff = GEM_EIHNDL;
if (fd >= 0 && fd <= 2)
{
// stdin, stdout and stderr just returns OK without doing anything.
return 0;
}
else if (fd >= 3)
{
// Any file descriptor
unsigned short bios_mode = 3; // invalid mode
switch (whence)
{
case SEEK_SET:
bios_mode = 0;
break;
case SEEK_CUR:
bios_mode = 1;
break;
case SEEK_END:
bios_mode = 2;
break;
}
newoff = trap1_42((unsigned int)offset, (unsigned short)fd, bios_mode);
}
if (newoff < 0)
{
gem_error_to_errno(newoff);
return (off_t)-1;
}
return (off_t)newoff;
}
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