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Annotation of researchv10no/libI77/notused/setbuf.c, revision 1.1

1.1     ! root        1: /*     @(#)setbuf.c    2.2     */
        !             2: /*     3.0 SID #       1.2     */
        !             3: /*LINTLIBRARY*/
        !             4: #include <stdio.h>
        !             5: 
        !             6: extern void free();
        !             7: extern int isatty();
        !             8: extern unsigned char _smbuf[][_SBFSIZ];
        !             9: #if !u370
        !            10: extern unsigned char *_stdbuf[];
        !            11: #else
        !            12: extern char *malloc();
        !            13: #endif
        !            14: 
        !            15: void
        !            16: setbuf(iop, buf)
        !            17: register FILE *iop;
        !            18: char   *buf;
        !            19: {
        !            20:        register int fno = fileno(iop);  /* file number */
        !            21: 
        !            22:        if(iop->_base != NULL && iop->_flag & _IOMYBUF)
        !            23:                free((char*)iop->_base);
        !            24:        iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
        !            25:        if((iop->_base = (unsigned char*)buf) == NULL) {
        !            26:                iop->_flag |= _IONBF; /* file unbuffered except in fastio */
        !            27: #if u370
        !            28:                if ( (iop->_base = (unsigned char *) malloc(BUFSIZ+8)) != NULL){
        !            29:                        iop->_flag |= _IOMYBUF;
        !            30:                        _bufend(iop) = iop->_base + BUFSIZ;
        !            31:                }
        !            32: #else
        !            33:                if (fno < 2)  /* for stdin, stdout, use the existing bufs */
        !            34:                        _bufend(iop) = (iop->_base = _stdbuf[fno]) + BUFSIZ;
        !            35: #endif
        !            36: 
        !            37:                else   /* otherwise, use small buffers reserved for this */
        !            38:                        _bufend(iop) = (iop->_base = _smbuf[fno]) + _SBFSIZ;
        !            39:        }
        !            40:        else {  /* regular buffered I/O, standard buffer size */
        !            41:                _bufend(iop) = iop->_base + BUFSIZ;
        !            42:                if (isatty(fno))
        !            43:                        iop->_flag |= _IOLBF;
        !            44:        }
        !            45:        iop->_ptr = iop->_base;
        !            46:        iop->_cnt = 0;
        !            47: }

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