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Annotation of 43BSDTahoe/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 and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  *
        !            17:  *     @(#)gets.c      7.4 (Berkeley) 9/12/88
        !            18:  */
        !            19: 
        !            20: gets(buf)
        !            21:        char *buf;
        !            22: {
        !            23:        register int c;
        !            24:        register char *lp;
        !            25: 
        !            26:        for (lp = buf;;)
        !            27:                switch(c = getchar() & 0177) {
        !            28:                case '\n':
        !            29:                case '\r':
        !            30:                        *lp = '\0';
        !            31:                        return;
        !            32:                case '\b':
        !            33:                case '\177':
        !            34:                        if (lp > buf) {
        !            35:                                lp--;
        !            36:                                putchar('\b');
        !            37:                                putchar(' ');
        !            38:                                putchar('\b');
        !            39:                        }
        !            40:                        break;
        !            41:                case '#':
        !            42:                        if (lp > buf)
        !            43:                                --lp;
        !            44:                        break;
        !            45:                case 'r'&037: {
        !            46:                        register char *p;
        !            47: 
        !            48:                        putchar('\n');
        !            49:                        for (p = buf; p < lp; ++p)
        !            50:                                putchar(*p);
        !            51:                        break;
        !            52:                }
        !            53:                case '@':
        !            54:                case 'u'&037:
        !            55:                case 'w'&037:
        !            56:                        lp = buf;
        !            57:                        putchar('\n');
        !            58:                        break;
        !            59:                default:
        !            60:                        *lp++ = c;
        !            61:                }
        !            62:        /*NOTREACHED*/
        !            63: }

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