diff options
Diffstat (limited to 'src/libfmt/pow10.c')
-rw-r--r-- | src/libfmt/pow10.c | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/src/libfmt/pow10.c b/src/libfmt/pow10.c deleted file mode 100644 index 65a426c3..00000000 --- a/src/libfmt/pow10.c +++ /dev/null @@ -1,57 +0,0 @@ -/* - * The authors of this software are Rob Pike and Ken Thompson. - * Copyright (c) 2002 by Lucent Technologies. - * Permission to use, copy, modify, and distribute this software for any - * purpose without fee is hereby granted, provided that this entire notice - * is included in all copies of any software which is or includes a copy - * or modification of this software and in all copies of the supporting - * documentation for such software. - * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY - * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY - * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE. - */ -#include <stdarg.h> -#include <string.h> -#include "utf.h" -#include "fmt.h" -#include "fmtdef.h" - -/* - * this table might overflow 127-bit exponent representations. - * in that case, truncate it after 1.0e38. - * it is important to get all one can from this - * routine since it is used in atof to scale numbers. - * the presumption is that C converts fp numbers better - * than multipication of lower powers of 10. - */ - -static -double tab[] = -{ - 1.0e0, 1.0e1, 1.0e2, 1.0e3, 1.0e4, 1.0e5, 1.0e6, 1.0e7, 1.0e8, 1.0e9, - 1.0e10,1.0e11,1.0e12,1.0e13,1.0e14,1.0e15,1.0e16,1.0e17,1.0e18,1.0e19, - 1.0e20,1.0e21,1.0e22,1.0e23,1.0e24,1.0e25,1.0e26,1.0e27,1.0e28,1.0e29, - 1.0e30,1.0e31,1.0e32,1.0e33,1.0e34,1.0e35,1.0e36,1.0e37,1.0e38,1.0e39, - 1.0e40,1.0e41,1.0e42,1.0e43,1.0e44,1.0e45,1.0e46,1.0e47,1.0e48,1.0e49, - 1.0e50,1.0e51,1.0e52,1.0e53,1.0e54,1.0e55,1.0e56,1.0e57,1.0e58,1.0e59, - 1.0e60,1.0e61,1.0e62,1.0e63,1.0e64,1.0e65,1.0e66,1.0e67,1.0e68,1.0e69, -}; - -double -__fmtpow10(int n) -{ - int m; - - if(n < 0) { - n = -n; - if(n < (int)(sizeof(tab)/sizeof(tab[0]))) - return 1/tab[n]; - m = n/2; - return __fmtpow10(-m) * __fmtpow10(m-n); - } - if(n < (int)(sizeof(tab)/sizeof(tab[0]))) - return tab[n]; - m = n/2; - return __fmtpow10(m) * __fmtpow10(n-m); -} |