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Annotation of 43BSDReno/lib/libpc/EXPO.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1979 The 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: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)EXPO.c     1.3 (Berkeley) 4/9/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: long
        !            25: EXPO(value)
        !            26: 
        !            27:        double  value;
        !            28: {
        !            29:        register int retval;
        !            30:        register char *cp;
        !            31:        char sign, buf[30];
        !            32:        extern char *index();
        !            33: 
        !            34:        if (value == 0.0)
        !            35:                return 0;
        !            36:        sprintf(buf, "%.1e", value);
        !            37:        cp = index(buf, 'e') + 1;
        !            38:        sign = *cp++;
        !            39:        retval = 0;
        !            40:        while (*cp)
        !            41:                retval = retval * 10 + *cp++ - '0';
        !            42:        return sign == '-' ? -retval : retval;
        !            43: }

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