diff options
Diffstat (limited to 'lib/libc/stdio/floatio.h')
| -rw-r--r-- | lib/libc/stdio/floatio.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/libc/stdio/floatio.h b/lib/libc/stdio/floatio.h index 20f9801e466..97690308442 100644 --- a/lib/libc/stdio/floatio.h +++ b/lib/libc/stdio/floatio.h @@ -1,4 +1,4 @@ -/* $OpenBSD: floatio.h,v 1.3 2003/06/02 20:18:37 millert Exp $ */ +/* $OpenBSD: floatio.h,v 1.4 2008/09/07 20:36:08 martynas Exp $ */ /*- * Copyright (c) 1990, 1993 @@ -40,3 +40,19 @@ #define MAXEXP 308 /* 128 bit fraction takes up 39 decimal digits; max reasonable precision */ #define MAXFRACT 39 + +/* + * MAXEXPDIG is the maximum number of decimal digits needed to store a + * floating point exponent in the largest supported format. It should + * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point + * conversions are supported, ceil(log10(LDBL_MAX_EXP)). But since it + * is presently never greater than 5 in practice, we fudge it. + */ +#define MAXEXPDIG 6 +#if LDBL_MAX_EXP > 999999 +#error "floating point buffers too small" +#endif + +char *__hdtoa(double, const char *, int, int *, int *, char **); +char *__hldtoa(long double, const char *, int, int *, int *, char **); +char *__ldtoa(long double *, int, int, int *, int *, char **); |