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authorMartynas Venckus <martynas@cvs.openbsd.org>2008-09-07 20:36:11 +0000
committerMartynas Venckus <martynas@cvs.openbsd.org>2008-09-07 20:36:11 +0000
commit319618ea76ca9de5c1e1b02bff3bddbdf5c46dc7 (patch)
tree402fb699f6a3a45a23dce26a3952cfee3d992421 /lib/libc/stdio/floatio.h
parent6e9298963b5a9bb500e3f8308cd681b32638fb31 (diff)
- replace dtoa w/ David's gdtoa, version 2008-03-15
- provide proper dtoa locks - use the real strtof implementation - add strtold, __hdtoa, __hldtoa - add %a/%A support - don't lose precision in printf, don't round to double anymore - implement extended-precision versions of libc functions: fpclassify, isnan, isinf, signbit, isnormal, isfinite, now that the ieee.h is fixed - separate vax versions of strtof, and __hdtoa - add complex math support. added functions: cacos, casin, catan, ccos, csin, ctan, cacosh, casinh, catanh, ccosh, csinh, ctanh, cexp, clog, cabs, cpow, csqrt, carg, cimag, conj, cproj, creal, cacosf, casinf, catanf, ccosf, csinf, ctanf, cacoshf, casinhf, catanhf, ccoshf, csinhf, ctanhf, cexpf, clogf, cabsf, cpowf, csqrtf, cargf, cimagf, conjf, cprojf, crealf - add fdim, fmax, fmin - add log2. (adapted implementation e_log.c. could be more acruate & faster, but it's good enough for now) - remove wrappers & cruft in libm, supposed to work-around mistakes in SVID, etc.; use ieee versions. fixes issues in python 2.6 for djm@ - make _digittoint static - proper definitions for i386, and amd64 in ieee.h - sh, powerpc don't really have extended-precision - add missing definitions for mips64 (quad), m{6,8}k (96-bit) float.h for LDBL_* - merge lead to frac for m{6,8}k, for gdtoa to work properly - add FRAC*BITS & EXT_TO_ARRAY32 definitions in ieee.h, for hdtoa&ldtoa to use - add EXT_IMPLICIT_NBIT definition, which indicates implicit normalization bit - add regression tests for libc: fpclassify and printf - arith.h & gd_qnan.h definitions - update ieee.h: hppa doesn't have quad-precision, hppa64 does - add missing prototypes to gdtoaimp - on 64-bit platforms make sure gdtoa doesn't use a long when it really wants an int - etc., what i may have forgotten... - bump libm major, due to removed&changed symbols - no libc bump, since this is riding on djm's libc major crank from a day ago discussed with / requested by / testing theo, sthen@, djm@, jsg@, merdely@, jsing@, tedu@, brad@, jakemsr@, and others. looks good to millert@ parts of the diff ok kettenis@ this commit does not include: - man page changes
Diffstat (limited to 'lib/libc/stdio/floatio.h')
-rw-r--r--lib/libc/stdio/floatio.h18
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 **);