29 lines
586 B
C
29 lines
586 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <cpm.h>
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#include "cpmsys.h"
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off_t lseek(int fd, off_t offset, int whence)
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{
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struct FCBE* fcbe = &__fd[fd];
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__init_file_descriptors();
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if (fcbe->fcb.dr == 0)
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{
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/* Can't seek the console. */
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return 0;
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}
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if (whence == SEEK_END)
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offset += fcbe->length<<7;
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if (whence == SEEK_CUR)
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offset += (U16(fcbe->fcb.r)<<7) | fcbe->offset;
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U16(fcbe->fcb.r) = offset>>7;
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fcbe->offset = offset & 0x7f;
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return 0;
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}
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