49 lines
853 B
C
49 lines
853 B
C
/* $Header$ */
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#include <stdio.h>
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char *malloc();
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_fillbuf(iop)
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register FILE *iop;
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{
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static unsigned char ch[_NFILES];
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iop->_count = 0;
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if (fileno(iop) < 0) return EOF;
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if ( io_testflag(iop, (IO_EOF | IO_ERR )))
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return (EOF);
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if ( !io_testflag(iop, IO_READMODE) )
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return (EOF);
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if (! io_testflag(iop, IO_UNBUFF) && ! iop->_buf) {
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iop->_buf = (unsigned char *) malloc(_BUFSIZ);
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if (! iop->_buf) {
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iop->_flags |= IO_UNBUFF;
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}
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else {
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iop->_flags |= IO_MYBUF;
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iop->_bufsiz = _BUFSIZ;
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}
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}
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if (! iop->_buf) {
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iop->_buf = &ch[fileno(iop)];
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iop->_bufsiz = 1;
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}
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iop->_ptr = iop->_buf;
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iop->_count = read(iop->_fd, iop->_buf, iop->_bufsiz);
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if (iop->_count <= 0){
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if (iop->_count == 0) {
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iop->_flags |= IO_EOF;
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}
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else
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iop->_flags |= IO_ERR;
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return (EOF);
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}
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iop->_count--;
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return *iop->_ptr++;
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}
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