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Annotation of 43BSDReno/lib/libpc/EXPO.c, revision 1.1.1.1

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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