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Annotation of 43BSDReno/sys/stand/gets.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)gets.c      7.5 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: gets(buf)
        !            24:        char *buf;
        !            25: {
        !            26:        register int c;
        !            27:        register char *lp;
        !            28: 
        !            29:        for (lp = buf;;)
        !            30:                switch(c = getchar() & 0177) {
        !            31:                case '\n':
        !            32:                case '\r':
        !            33:                        *lp = '\0';
        !            34:                        return;
        !            35:                case '\b':
        !            36:                case '\177':
        !            37:                        if (lp > buf) {
        !            38:                                lp--;
        !            39:                                putchar('\b');
        !            40:                                putchar(' ');
        !            41:                                putchar('\b');
        !            42:                        }
        !            43:                        break;
        !            44:                case '#':
        !            45:                        if (lp > buf)
        !            46:                                --lp;
        !            47:                        break;
        !            48:                case 'r'&037: {
        !            49:                        register char *p;
        !            50: 
        !            51:                        putchar('\n');
        !            52:                        for (p = buf; p < lp; ++p)
        !            53:                                putchar(*p);
        !            54:                        break;
        !            55:                }
        !            56:                case '@':
        !            57:                case 'u'&037:
        !            58:                case 'w'&037:
        !            59:                        lp = buf;
        !            60:                        putchar('\n');
        !            61:                        break;
        !            62:                default:
        !            63:                        *lp++ = c;
        !            64:                }
        !            65:        /*NOTREACHED*/
        !            66: }

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