gnulib-local: Replace libxml2 trio with Gnulib

* gettext-tools/gnulib-lib/.gitignore: Ignore files brought by
gnulib-tool.
* gettext-tools/gnulib-tests/.gitignore: Likewise.
* gnulib-local/lib/libxml/triodef.h: Remove.
* gnulib-local/lib/libxml/trionan.c: Replace it with Gnulib functions.
* gnulib-local/lib/libxml/trionan.h: Remove.
* gnulib-local/modules/libxml (Depends-on): Add 'isinf', 'isnan', and
'signbit'.

6 files changed, 98 insertions, 1225 deletions

diff --git a/gettext-tools/gnulib-lib/.gitignore b/gettext-tools/gnulib-lib/.gitignore
index 5ff51b2..f732943 100644
--- a/gettext-tools/gnulib-lib/.gitignore
+++ b/gettext-tools/gnulib-lib/.gitignore
@@ -10,14 +10,7 @@
 /uniwidth
 
 # Files brought in by gnulib-tool:
-
-
-
-# Files generated by gperf:
-# Files generated by moopp:
-# Files generated by the autotools:
 /Makefile.gnulib
-/Makefile.in
 /acl-errno-valid.c
 /acl-internal.c
 /acl-internal.h
@@ -99,8 +92,6 @@
 /fd-hook.h
 /fd-ostream.c
 /fd-ostream.h
-/fd-ostream.oo.c
-/fd-ostream.oo.h
 /fd-safer-flag.c
 /fd-safer.c
 /fd_ostream.priv.h
@@ -108,8 +99,6 @@
 /file-has-acl.c
 /file-ostream.c
 /file-ostream.h
-/file-ostream.oo.c
-/file-ostream.oo.h
 /file_ostream.priv.h
 /file_ostream.vt.h
 /filename.h
@@ -161,12 +150,8 @@
 /hash.h
 /html-ostream.c
 /html-ostream.h
-/html-ostream.oo.c
-/html-ostream.oo.h
 /html-styled-ostream.c
 /html-styled-ostream.h
-/html-styled-ostream.oo.c
-/html-styled-ostream.oo.h
 /html_ostream.priv.h
 /html_ostream.vt.h
 /html_styled_ostream.priv.h
@@ -175,15 +160,10 @@
 /iconv.in.h
 /iconv_close.c
 /iconv_open-aix.gperf
-/iconv_open-aix.h
 /iconv_open-hpux.gperf
-/iconv_open-hpux.h
 /iconv_open-irix.gperf
-/iconv_open-irix.h
 /iconv_open-osf.gperf
-/iconv_open-osf.h
 /iconv_open-solaris.gperf
-/iconv_open-solaris.h
 /iconv_open.c
 /iconveh.h
 /ignore-value.h
@@ -244,8 +224,6 @@
 /opendir.c
 /ostream.c
 /ostream.h
-/ostream.oo.c
-/ostream.oo.h
 /ostream.priv.h
 /ostream.vt.h
 /pathmax.h
@@ -437,3 +415,38 @@
 /xstriconveh.h
 /xvasprintf.c
 /xvasprintf.h
+/isinf.c
+/isnan.c
+/isnand-nolibm.h
+/isnand.c
+/isnanf-nolibm.h
+/isnanf.c
+/isnanl-nolibm.h
+/isnanl.c
+/math.c
+/math.in.h
+/signbitd.c
+/signbitf.c
+/signbitl.c
+
+# Files generated by gperf:
+/iconv_open-aix.h
+/iconv_open-hpux.h
+/iconv_open-irix.h
+/iconv_open-osf.h
+/iconv_open-solaris.h
+
+# Files generated by moopp:
+/fd-ostream.oo.c
+/fd-ostream.oo.h
+/file-ostream.oo.c
+/file-ostream.oo.h
+/html-ostream.oo.c
+/html-ostream.oo.h
+/html-styled-ostream.oo.c
+/html-styled-ostream.oo.h
+/ostream.oo.c
+/ostream.oo.h
+
+# Files generated by the autotools:
+/Makefile.in
diff --git a/gettext-tools/gnulib-tests/.gitignore b/gettext-tools/gnulib-tests/.gitignore
index d66e6d0..efd9002 100644
--- a/gettext-tools/gnulib-tests/.gitignore
+++ b/gettext-tools/gnulib-tests/.gitignore
@@ -20,12 +20,15 @@
 /getcwd-lgpl.c
 /getpagesize.c
 /ignore-value.h
+/infinity.h
 /init.sh
 /inttypes.in.h
 /lseek.c
 /macros.h
 /mbtowc-impl.h
 /mbtowc.c
+/minus-zero.h
+/nan.h
 /putenv.c
 /read-file.c
 /read-file.h
@@ -114,6 +117,17 @@
 /test-init.sh
 /test-intprops.c
 /test-inttypes.c
+/test-isinf.c
+/test-isnan.c
+/test-isnand-nolibm.c
+/test-isnand.c
+/test-isnand.h
+/test-isnanf-nolibm.c
+/test-isnanf.c
+/test-isnanf.h
+/test-isnanl-nolibm.c
+/test-isnanl.c
+/test-isnanl.h
 /test-iswblank.c
 /test-langinfo.c
 /test-linked_list.c
@@ -126,6 +140,7 @@
 /test-lstat.c
 /test-lstat.h
 /test-malloca.c
+/test-math.c
 /test-mbrtowc-w32-1.sh
 /test-mbrtowc-w32-2.sh
 /test-mbrtowc-w32-3.sh
@@ -204,6 +219,7 @@
 /test-sigaction.c
 /test-signal-h.c
 /test-signal.c
+/test-signbit.c
 /test-sigpipe.c
 /test-sigpipe.sh
 /test-sigprocmask.c
diff --git a/gnulib-local/lib/libxml/triodef.h b/gnulib-local/lib/libxml/triodef.h
deleted file mode 100644
index 46772ee..0000000
--- a/gnulib-local/lib/libxml/triodef.h
+++ /dev/null
@@ -1,228 +0,0 @@
-/*************************************************************************
- *
- * $Id$
- *
- * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
- * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
- *
- ************************************************************************/
-
-#ifndef TRIO_TRIODEF_H
-#define TRIO_TRIODEF_H
-
-/*************************************************************************
- * Platform and compiler support detection
- */
-#if defined(__GNUC__)
-# define TRIO_COMPILER_GCC
-#elif defined(__SUNPRO_C)
-# define TRIO_COMPILER_SUNPRO
-#elif defined(__SUNPRO_CC)
-# define TRIO_COMPILER_SUNPRO
-# define __SUNPRO_C __SUNPRO_CC
-#elif defined(__xlC__) || defined(__IBMC__) || defined(__IBMCPP__)
-# define TRIO_COMPILER_XLC
-#elif defined(_AIX) && !defined(__GNUC__)
-# define TRIO_COMPILER_XLC /* Workaround for old xlc */
-#elif defined(__DECC) || defined(__DECCXX)
-# define TRIO_COMPILER_DECC
-#elif defined(__osf__) && defined(__LANGUAGE_C__)
-# define TRIO_COMPILER_DECC /* Workaround for old DEC C compilers */
-#elif defined(_MSC_VER)
-# define TRIO_COMPILER_MSVC
-#elif defined(__BORLANDC__)
-# define TRIO_COMPILER_BCB
-#endif
-
-#if defined(VMS) || defined(__VMS)
-/*
- * VMS is placed first to avoid identifying the platform as Unix
- * based on the DECC compiler later on.
- */
-# define TRIO_PLATFORM_VMS
-#elif defined(__OS400__)
-# define TRIO_PLATFORM_OS400
-#elif defined(unix) || defined(__unix) || defined(__unix__)
-# define TRIO_PLATFORM_UNIX
-#elif defined(TRIO_COMPILER_XLC) || defined(_AIX)
-# define TRIO_PLATFORM_UNIX
-#elif defined(TRIO_COMPILER_DECC) || defined(__osf___)
-# define TRIO_PLATFORM_UNIX
-#elif defined(__NetBSD__)
-# define TRIO_PLATFORM_UNIX
-#elif defined(__Lynx__)
-# define TRIO_PLATFORM_UNIX
-#elif defined(__QNX__)
-# define TRIO_PLATFORM_UNIX
-# define TRIO_PLATFORM_QNX
-#elif defined(__CYGWIN__)
-# define TRIO_PLATFORM_UNIX
-#elif defined(AMIGA) && defined(TRIO_COMPILER_GCC)
-# define TRIO_PLATFORM_UNIX
-#elif defined(TRIO_COMPILER_MSVC) || defined(WIN32) || defined(_WIN32)
-# define TRIO_PLATFORM_WIN32
-#elif defined(mpeix) || defined(__mpexl)
-# define TRIO_PLATFORM_MPEIX
-#endif
-
-#if defined(_AIX)
-# define TRIO_PLATFORM_AIX
-#elif defined(__hpux)
-# define TRIO_PLATFORM_HPUX
-#elif defined(sun) || defined(__sun__)
-# if defined(__SVR4) || defined(__svr4__)
-#  define TRIO_PLATFORM_SOLARIS
-# else
-#  define TRIO_PLATFORM_SUNOS
-# endif
-#endif
-
-#if defined(__STDC__) || defined(TRIO_COMPILER_MSVC) || defined(TRIO_COMPILER_BCB)
-# define TRIO_COMPILER_SUPPORTS_C89
-# if defined(__STDC_VERSION__)
-#  define TRIO_COMPILER_SUPPORTS_C90
-#  if (__STDC_VERSION__ >= 199409L)
-#   define TRIO_COMPILER_SUPPORTS_C94
-#  endif
-#  if (__STDC_VERSION__ >= 199901L)
-#   define TRIO_COMPILER_SUPPORTS_C99
-#  endif
-# elif defined(TRIO_COMPILER_SUNPRO)
-#  if (__SUNPRO_C >= 0x420)
-#   define TRIO_COMPILER_SUPPORTS_C94
-#  endif
-# endif
-#elif defined(TRIO_COMPILER_XLC) && defined(__EXTENDED__)
-# define TRIO_COMPILER_SUPPORTS_C89
-# define TRIO_COMPILER_SUPPORTS_C90
-# define TRIO_COMPILER_SUPPORTS_C94
-#endif
-
-#if defined(_XOPEN_SOURCE)
-# if defined(_XOPEN_SOURCE_EXTENDED)
-#  define TRIO_COMPILER_SUPPORTS_UNIX95
-# endif
-# if (_XOPEN_VERSION >= 500)
-#  define TRIO_COMPILER_SUPPORTS_UNIX98
-# endif
-# if (_XOPEN_VERSION >= 600)
-#  define TRIO_COMPILER_SUPPORTS_UNIX01
-# endif
-#endif
-
-/*************************************************************************
- * Generic defines
- */
-
-#if !defined(TRIO_PUBLIC)
-# define TRIO_PUBLIC
-#endif
-#if !defined(TRIO_PRIVATE)
-# define TRIO_PRIVATE static
-#endif
-
-#if !(defined(TRIO_COMPILER_SUPPORTS_C89) || defined(__cplusplus))
-# define TRIO_COMPILER_ANCIENT
-#endif
-
-#if defined(TRIO_COMPILER_ANCIENT)
-# define TRIO_CONST
-# define TRIO_VOLATILE
-# define TRIO_SIGNED
-typedef double trio_long_double_t;
-typedef char * trio_pointer_t;
-# define TRIO_SUFFIX_LONG(x) x
-# define TRIO_PROTO(x) ()
-# define TRIO_NOARGS
-# define TRIO_ARGS1(list,a1) list a1;
-# define TRIO_ARGS2(list,a1,a2) list a1; a2;
-# define TRIO_ARGS3(list,a1,a2,a3) list a1; a2; a3;
-# define TRIO_ARGS4(list,a1,a2,a3,a4) list a1; a2; a3; a4;
-# define TRIO_ARGS5(list,a1,a2,a3,a4,a5) list a1; a2; a3; a4; a5;
-# define TRIO_ARGS6(list,a1,a2,a3,a4,a5,a6) list a1; a2; a3; a4; a5; a6;
-# define TRIO_VARGS2(list,a1,a2) list a1; a2
-# define TRIO_VARGS3(list,a1,a2,a3) list a1; a2; a3
-# define TRIO_VARGS4(list,a1,a2,a3,a4) list a1; a2; a3; a4
-# define TRIO_VARGS5(list,a1,a2,a3,a4,a5) list a1; a2; a3; a4; a5
-# define TRIO_VA_DECL va_dcl
-# define TRIO_VA_START(x,y) va_start(x)
-# define TRIO_VA_END(x) va_end(x)
-#else /* ANSI C */
-# define TRIO_CONST const
-# define TRIO_VOLATILE volatile
-# define TRIO_SIGNED signed
-typedef long double trio_long_double_t;
-typedef void * trio_pointer_t;
-# define TRIO_SUFFIX_LONG(x) x ## L
-# define TRIO_PROTO(x) x
-# define TRIO_NOARGS void
-# define TRIO_ARGS1(list,a1) (a1)
-# define TRIO_ARGS2(list,a1,a2) (a1,a2)
-# define TRIO_ARGS3(list,a1,a2,a3) (a1,a2,a3)
-# define TRIO_ARGS4(list,a1,a2,a3,a4) (a1,a2,a3,a4)
-# define TRIO_ARGS5(list,a1,a2,a3,a4,a5) (a1,a2,a3,a4,a5)
-# define TRIO_ARGS6(list,a1,a2,a3,a4,a5,a6) (a1,a2,a3,a4,a5,a6)
-# define TRIO_VARGS2 TRIO_ARGS2
-# define TRIO_VARGS3 TRIO_ARGS3
-# define TRIO_VARGS4 TRIO_ARGS4
-# define TRIO_VARGS5 TRIO_ARGS5
-# define TRIO_VA_DECL ...
-# define TRIO_VA_START(x,y) va_start(x,y)
-# define TRIO_VA_END(x) va_end(x)
-#endif
-
-#if defined(TRIO_COMPILER_SUPPORTS_C99) || defined(__cplusplus)
-# define TRIO_INLINE inline
-#elif defined(TRIO_COMPILER_GCC)
-# define TRIO_INLINE __inline__
-#elif defined(TRIO_COMPILER_MSVC)
-# define TRIO_INLINE _inline
-#elif defined(TRIO_COMPILER_BCB)
-# define TRIO_INLINE __inline
-#else
-# define TRIO_INLINE
-#endif
-
-/*************************************************************************
- * Workarounds
- */
-
-#if defined(TRIO_PLATFORM_VMS)
-/*
- * Computations done with constants at compile time can trigger these
- * even when compiling with IEEE enabled.
- */
-# pragma message disable (UNDERFLOW, FLOATOVERFL)
-
-# if (__CRTL_VER < 80000000)
-/*
- * Although the compiler supports C99 language constructs, the C
- * run-time library does not contain all C99 functions.
- *
- * This was the case for 70300022. Update the 80000000 value when
- * it has been accurately determined what version of the library
- * supports C99.
- */
-#  if defined(TRIO_COMPILER_SUPPORTS_C99)
-#   undef TRIO_COMPILER_SUPPORTS_C99
-#  endif
-# endif
-#endif
-
-/*
- * Not all preprocessors supports the LL token.
- */
-#if defined(TRIO_COMPILER_BCB)
-#else
-# define TRIO_COMPILER_SUPPORTS_LL
-#endif
-
-#endif /* TRIO_TRIODEF_H */
diff --git a/gnulib-local/lib/libxml/trionan.c b/gnulib-local/lib/libxml/trionan.c
index 6fbabb5..043299c 100644
--- a/gnulib-local/lib/libxml/trionan.c
+++ b/gnulib-local/lib/libxml/trionan.c
@@ -1,914 +1,71 @@
-/*************************************************************************
- *
- * $Id$
- *
- * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
- * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
- *
- ************************************************************************
- *
- * Functions to handle special quantities in floating-point numbers
- * (that is, NaNs and infinity). They provide the capability to detect
- * and fabricate special quantities.
- *
- * Although written to be as portable as possible, it can never be
- * guaranteed to work on all platforms, as not all hardware supports
- * special quantities.
- *
- * The approach used here (approximately) is to:
- *
- *   1. Use C99 functionality when available.
- *   2. Use IEEE 754 bit-patterns if possible.
- *   3. Use platform-specific techniques.
- *
- ************************************************************************/
-
-/*
- * TODO:
- *  o Put all the magic into trio_fpclassify_and_signbit(), and use this from
- *    trio_isnan() etc.
- */
-
-/*************************************************************************
- * Include files
- */
-#include "triodef.h"
-#include "trionan.h"
+/* Replacement 'trionan.c', using Gnulib functions.  */
 
+#include "config.h"
 #include <math.h>
-#include <string.h>
-#include <limits.h>
-#include <float.h>
-#if defined(TRIO_PLATFORM_UNIX)
-# include <signal.h>
-#endif
-#if defined(TRIO_COMPILER_DECC)
-#  if defined(__linux__)
-#   include <cpml.h>
-#  else
-#   include <fp_class.h>
-#  endif
-#endif
-#include <assert.h>
-
-#if defined(TRIO_DOCUMENTATION)
-# include "doc/doc_nan.h"
-#endif
-/** @addtogroup SpecialQuantities
-    @{
-*/
-
-/*************************************************************************
- * Definitions
- */
-
-#define TRIO_TRUE (1 == 1)
-#define TRIO_FALSE (0 == 1)
-
-/*
- * We must enable IEEE floating-point on Alpha
- */
-#if defined(__alpha) && !defined(_IEEE_FP)
-# if defined(TRIO_COMPILER_DECC)
-#  if defined(TRIO_PLATFORM_VMS)
-#   error "Must be compiled with option /IEEE_MODE=UNDERFLOW_TO_ZERO/FLOAT=IEEE"
-#  else
-#   if !defined(_CFE)
-#    error "Must be compiled with option -ieee"
-#   endif
-#  endif
-# elif defined(TRIO_COMPILER_GCC) && (defined(__osf__) || defined(__linux__))
-#  error "Must be compiled with option -mieee"
-# endif
-#endif /* __alpha && ! _IEEE_FP */
-
-/*
- * In ANSI/IEEE 754-1985 64-bits double format numbers have the
- * following properties (amoungst others)
- *
- *   o FLT_RADIX == 2: binary encoding
- *   o DBL_MAX_EXP == 1024: 11 bits exponent, where one bit is used
- *     to indicate special numbers (e.g. NaN and Infinity), so the
- *     maximum exponent is 10 bits wide (2^10 == 1024).
- *   o DBL_MANT_DIG == 53: The mantissa is 52 bits wide, but because
- *     numbers are normalized the initial binary 1 is represented
- *     implicitly (the so-called "hidden bit"), which leaves us with
- *     the ability to represent 53 bits wide mantissa.
- */
-#if (FLT_RADIX == 2) && (DBL_MAX_EXP == 1024) && (DBL_MANT_DIG == 53)
-# define USE_IEEE_754
-#endif
-
-
-/*************************************************************************
- * Constants
- */
-
-static TRIO_CONST char rcsid[] = "@(#)$Id$";
-
-#if defined(USE_IEEE_754)
-
-/*
- * Endian-agnostic indexing macro.
- *
- * The value of internalEndianMagic, when converted into a 64-bit
- * integer, becomes 0x0706050403020100 (we could have used a 64-bit
- * integer value instead of a double, but not all platforms supports
- * that type). The value is automatically encoded with the correct
- * endianess by the compiler, which means that we can support any
- * kind of endianess. The individual bytes are then used as an index
- * for the IEEE 754 bit-patterns and masks.
- */
-#define TRIO_DOUBLE_INDEX(x) (((unsigned char *)&internalEndianMagic)[7-(x)])
-
-#if (defined(__BORLANDC__) && __BORLANDC__ >= 0x0590)
-static TRIO_CONST double internalEndianMagic = 7.949928895127362e-275;
-#else
-static TRIO_CONST double internalEndianMagic = 7.949928895127363e-275;
-#endif
 
-/* Mask for the exponent */
-static TRIO_CONST unsigned char ieee_754_exponent_mask[] = {
-  0x7F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
+/* Copied from gnulib/tests/infinity.h.  */
 
-/* Mask for the mantissa */
-static TRIO_CONST unsigned char ieee_754_mantissa_mask[] = {
-  0x00, 0x0F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
-};
+/* Infinityd () returns a 'double' +Infinity.  */
 
-/* Mask for the sign bit */
-static TRIO_CONST unsigned char ieee_754_sign_mask[] = {
-  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-/* Bit-pattern for negative zero */
-static TRIO_CONST unsigned char ieee_754_negzero_array[] = {
-  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-/* Bit-pattern for infinity */
-static TRIO_CONST unsigned char ieee_754_infinity_array[] = {
-  0x7F, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-/* Bit-pattern for quiet NaN */
-static TRIO_CONST unsigned char ieee_754_qnan_array[] = {
-  0x7F, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
-};
-
-
-/*************************************************************************
- * Functions
- */
-
-/*
- * trio_make_double
- */
-TRIO_PRIVATE double
-trio_make_double
-TRIO_ARGS1((values),
-	   TRIO_CONST unsigned char *values)
-{
-  TRIO_VOLATILE double result;
-  int i;
-
-  for (i = 0; i < (int)sizeof(double); i++) {
-    ((TRIO_VOLATILE unsigned char *)&result)[TRIO_DOUBLE_INDEX(i)] = values[i];
-  }
-  return result;
-}
-
-/*
- * trio_is_special_quantity
- */
-TRIO_PRIVATE int
-trio_is_special_quantity
-TRIO_ARGS2((number, has_mantissa),
-	   double number,
-	   int *has_mantissa)
+/* The Microsoft MSVC 9 compiler chokes on the expression 1.0 / 0.0.  */
+#if defined _MSC_VER
+static double
+Infinityd ()
 {
-  unsigned int i;
-  unsigned char current;
-  int is_special_quantity = TRIO_TRUE;
-
-  *has_mantissa = 0;
-
-  for (i = 0; i < (unsigned int)sizeof(double); i++) {
-    current = ((unsigned char *)&number)[TRIO_DOUBLE_INDEX(i)];
-    is_special_quantity
-      &= ((current & ieee_754_exponent_mask[i]) == ieee_754_exponent_mask[i]);
-    *has_mantissa |= (current & ieee_754_mantissa_mask[i]);
-  }
-  return is_special_quantity;
+  static double zero = 0.0;
+  return 1.0 / zero;
 }
-
-/*
- * trio_is_negative
- */
-TRIO_PRIVATE int
-trio_is_negative
-TRIO_ARGS1((number),
-	   double number)
-{
-  unsigned int i;
-  int is_negative = TRIO_FALSE;
-
-  for (i = 0; i < (unsigned int)sizeof(double); i++) {
-    is_negative |= (((unsigned char *)&number)[TRIO_DOUBLE_INDEX(i)]
-		    & ieee_754_sign_mask[i]);
-  }
-  return is_negative;
-}
-
-#endif /* USE_IEEE_754 */
-
-
-/**
-   Generate negative zero.
-
-   @return Floating-point representation of negative zero.
-*/
-TRIO_PUBLIC double
-trio_nzero(TRIO_NOARGS)
-{
-#if defined(USE_IEEE_754)
-  return trio_make_double(ieee_754_negzero_array);
 #else
-  TRIO_VOLATILE double zero = 0.0;
-
-  return -zero;
+# define Infinityd() (1.0 / 0.0)
 #endif
-}
 
-/**
-   Generate positive infinity.
+/* Copied from gnulib/tests/nan.h.  */
 
-   @return Floating-point representation of positive infinity.
-*/
-TRIO_PUBLIC double
-trio_pinf(TRIO_NOARGS)
-{
-  /* Cache the result */
-  static double result = 0.0;
-
-  if (result == 0.0) {
-
-#if defined(INFINITY) && defined(__STDC_IEC_559__)
-    result = (double)INFINITY;
+/* NaNd () returns a 'double' not-a-number.  */
 
-#elif defined(USE_IEEE_754)
-    result = trio_make_double(ieee_754_infinity_array);
-
-#else
-    /*
-     * If HUGE_VAL is different from DBL_MAX, then HUGE_VAL is used
-     * as infinity. Otherwise we have to resort to an overflow
-     * operation to generate infinity.
-     */
-# if defined(TRIO_PLATFORM_UNIX)
-    void (*signal_handler)(int) = signal(SIGFPE, SIG_IGN);
-# endif
-
-    result = HUGE_VAL;
-    if (HUGE_VAL == DBL_MAX) {
-      /* Force overflow */
-      result += HUGE_VAL;
-    }
-
-# if defined(TRIO_PLATFORM_UNIX)
-    signal(SIGFPE, signal_handler);
-# endif
-
-#endif
-  }
-  return result;
-}
-
-/**
-   Generate negative infinity.
-
-   @return Floating-point value of negative infinity.
-*/
-TRIO_PUBLIC double
-trio_ninf(TRIO_NOARGS)
+/* The Compaq (ex-DEC) C 6.4 compiler and the Microsoft MSVC 9 compiler choke
+   on the expression 0.0 / 0.0.  */
+#if defined __DECC || defined _MSC_VER
+static double
+NaNd ()
 {
-  static double result = 0.0;
-
-  if (result == 0.0) {
-    /*
-     * Negative infinity is calculated by negating positive infinity,
-     * which can be done because it is legal to do calculations on
-     * infinity (for example,  1 / infinity == 0).
-     */
-    result = -trio_pinf();
-  }
-  return result;
+  static double zero = 0.0;
+  return zero / zero;
 }
-
-/**
-   Generate NaN.
-
-   @return Floating-point representation of NaN.
-*/
-TRIO_PUBLIC double
-trio_nan(TRIO_NOARGS)
-{
-  /* Cache the result */
-  static double result = 0.0;
-
-  if (result == 0.0) {
-
-#if defined(TRIO_COMPILER_SUPPORTS_C99)
-    result = nan("");
-
-#elif defined(NAN) && defined(__STDC_IEC_559__)
-    result = (double)NAN;
-
-#elif defined(USE_IEEE_754)
-    result = trio_make_double(ieee_754_qnan_array);
-
 #else
-    /*
-     * There are several ways to generate NaN. The one used here is
-     * to divide infinity by infinity. I would have preferred to add
-     * negative infinity to positive infinity, but that yields wrong
-     * result (infinity) on FreeBSD.
-     *
-     * This may fail if the hardware does not support NaN, or if
-     * the Invalid Operation floating-point exception is unmasked.
-     */
-# if defined(TRIO_PLATFORM_UNIX)
-    void (*signal_handler)(int) = signal(SIGFPE, SIG_IGN);
-# endif
-
-    result = trio_pinf() / trio_pinf();
-
-# if defined(TRIO_PLATFORM_UNIX)
-    signal(SIGFPE, signal_handler);
-# endif
-
+# define NaNd() (0.0 / 0.0)
 #endif
-  }
-  return result;
-}
-
-/**
-   Check for NaN.
-
-   @param number An arbitrary floating-point number.
-   @return Boolean value indicating whether or not the number is a NaN.
-*/
-TRIO_PUBLIC int
-trio_isnan
-TRIO_ARGS1((number),
-	   double number)
-{
-#if (defined(TRIO_COMPILER_SUPPORTS_C99) && defined(isnan)) \
- || defined(TRIO_COMPILER_SUPPORTS_UNIX95)
-  /*
-   * C99 defines isnan() as a macro. UNIX95 defines isnan() as a
-   * function. This function was already present in XPG4, but this
-   * is a bit tricky to detect with compiler defines, so we choose
-   * the conservative approach and only use it for UNIX95.
-   */
-  return isnan(number);
 
-#elif defined(TRIO_COMPILER_MSVC) || defined(TRIO_COMPILER_BCB)
-  /*
-   * Microsoft Visual C++ and Borland C++ Builder have an _isnan()
-   * function.
-   */
-  return _isnan(number) ? TRIO_TRUE : TRIO_FALSE;
+/* Copied from gnulib/tests/minus-zero.h.  */
 
-#elif defined(USE_IEEE_754)
-  /*
-   * Examine IEEE 754 bit-pattern. A NaN must have a special exponent
-   * pattern, and a non-empty mantissa.
-   */
-  int has_mantissa;
-  int is_special_quantity;
-
-  is_special_quantity = trio_is_special_quantity(number, &has_mantissa);
-
-  return (is_special_quantity && has_mantissa);
-
-#else
-  /*
-   * Fallback solution
-   */
-  int status;
-  double integral, fraction;
+/* minus_zerod represents the value -0.0.  */
 
-# if defined(TRIO_PLATFORM_UNIX)
-  void (*signal_handler)(int) = signal(SIGFPE, SIG_IGN);
-# endif
-
-  status = (/*
-	     * NaN is the only number which does not compare to itself
-	     */
-	    ((TRIO_VOLATILE double)number != (TRIO_VOLATILE double)number) ||
-	    /*
-	     * Fallback solution if NaN compares to NaN
-	     */
-	    ((number != 0.0) &&
-	     (fraction = modf(number, &integral),
-	      integral == fraction)));
-
-# if defined(TRIO_PLATFORM_UNIX)
-  signal(SIGFPE, signal_handler);
-# endif
-
-  return status;
-
-#endif
-}
-
-/**
-   Check for infinity.
-
-   @param number An arbitrary floating-point number.
-   @return 1 if positive infinity, -1 if negative infinity, 0 otherwise.
-*/
-TRIO_PUBLIC int
-trio_isinf
-TRIO_ARGS1((number),
-	   double number)
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+   ICC 10.0 has a bug when optimizing the expression -zero.
+   The expression -DBL_MIN * DBL_MIN does not work when cross-compiling
+   to PowerPC on Mac OS X 10.5.  */
+#if defined __hpux || defined __sgi || defined __ICC
+static double
+compute_minus_zerod (void)
 {
-#if defined(TRIO_COMPILER_DECC) && !defined(__linux__)
-  /*
-   * DECC has an isinf() macro, but it works differently than that
-   * of C99, so we use the fp_class() function instead.
-   */
-  return ((fp_class(number) == FP_POS_INF)
-	  ? 1
-	  : ((fp_class(number) == FP_NEG_INF) ? -1 : 0));
-
-#elif defined(isinf)
-  /*
-   * C99 defines isinf() as a macro.
-   */
-  return isinf(number)
-    ? ((number > 0.0) ? 1 : -1)
-    : 0;
-
-#elif defined(TRIO_COMPILER_MSVC) || defined(TRIO_COMPILER_BCB)
-  /*
-   * Microsoft Visual C++ and Borland C++ Builder have an _fpclass()
-   * function that can be used to detect infinity.
-   */
-  return ((_fpclass(number) == _FPCLASS_PINF)
-	  ? 1
-	  : ((_fpclass(number) == _FPCLASS_NINF) ? -1 : 0));
-
-#elif defined(USE_IEEE_754)
-  /*
-   * Examine IEEE 754 bit-pattern. Infinity must have a special exponent
-   * pattern, and an empty mantissa.
-   */
-  int has_mantissa;
-  int is_special_quantity;
-
-  is_special_quantity = trio_is_special_quantity(number, &has_mantissa);
-
-  return (is_special_quantity && !has_mantissa)
-    ? ((number < 0.0) ? -1 : 1)
-    : 0;
-
-#else
-  /*
-   * Fallback solution.
-   */
-  int status;
-
-# if defined(TRIO_PLATFORM_UNIX)
-  void (*signal_handler)(int) = signal(SIGFPE, SIG_IGN);
-# endif
-
-  double infinity = trio_pinf();
-
-  status = ((number == infinity)
-	    ? 1
-	    : ((number == -infinity) ? -1 : 0));
-
-# if defined(TRIO_PLATFORM_UNIX)
-  signal(SIGFPE, signal_handler);
-# endif
-
-  return status;
-
-#endif
+  return -DBL_MIN * DBL_MIN;
 }
-
-#if 0
-	/* Temporary fix - this routine is not used anywhere */
-/**
-   Check for finity.
-
-   @param number An arbitrary floating-point number.
-   @return Boolean value indicating whether or not the number is a finite.
-*/
-TRIO_PUBLIC int
-trio_isfinite
-TRIO_ARGS1((number),
-	   double number)
-{
-#if defined(TRIO_COMPILER_SUPPORTS_C99) && defined(isfinite)
-  /*
-   * C99 defines isfinite() as a macro.
-   */
-  return isfinite(number);
-
-#elif defined(TRIO_COMPILER_MSVC) || defined(TRIO_COMPILER_BCB)
-  /*
-   * Microsoft Visual C++ and Borland C++ Builder use _finite().
-   */
-  return _finite(number);
-
-#elif defined(USE_IEEE_754)
-  /*
-   * Examine IEEE 754 bit-pattern. For finity we do not care about the
-   * mantissa.
-   */
-  int dummy;
-
-  return (! trio_is_special_quantity(number, &dummy));
-
+# define minus_zerod compute_minus_zerod ()
 #else
-  /*
-   * Fallback solution.
-   */
-  return ((trio_isinf(number) == 0) && (trio_isnan(number) == 0));
-
-#endif
-}
-
+double minus_zerod = -0.0;
 #endif
 
-/*
- * The sign of NaN is always false
- */
-TRIO_PUBLIC int
-trio_fpclassify_and_signbit
-TRIO_ARGS2((number, is_negative),
-	   double number,
-	   int *is_negative)
-{
-#if defined(fpclassify) && defined(signbit)
-  /*
-   * C99 defines fpclassify() and signbit() as a macros
-   */
-  *is_negative = signbit(number);
-  switch (fpclassify(number)) {
-  case FP_NAN:
-    return TRIO_FP_NAN;
-  case FP_INFINITE:
-    return TRIO_FP_INFINITE;
-  case FP_SUBNORMAL:
-    return TRIO_FP_SUBNORMAL;
-  case FP_ZERO:
-    return TRIO_FP_ZERO;
-  default:
-    return TRIO_FP_NORMAL;
-  }
-
-#else
-# if defined(TRIO_COMPILER_DECC)
-  /*
-   * DECC has an fp_class() function.
-   */
-#  define TRIO_FPCLASSIFY(n) fp_class(n)
-#  define TRIO_QUIET_NAN FP_QNAN
-#  define TRIO_SIGNALLING_NAN FP_SNAN
-#  define TRIO_POSITIVE_INFINITY FP_POS_INF
-#  define TRIO_NEGATIVE_INFINITY FP_NEG_INF
-#  define TRIO_POSITIVE_SUBNORMAL FP_POS_DENORM
-#  define TRIO_NEGATIVE_SUBNORMAL FP_NEG_DENORM
-#  define TRIO_POSITIVE_ZERO FP_POS_ZERO
-#  define TRIO_NEGATIVE_ZERO FP_NEG_ZERO
-#  define TRIO_POSITIVE_NORMAL FP_POS_NORM
-#  define TRIO_NEGATIVE_NORMAL FP_NEG_NORM
-
-# elif defined(TRIO_COMPILER_MSVC) || defined(TRIO_COMPILER_BCB)
-  /*
-   * Microsoft Visual C++ and Borland C++ Builder have an _fpclass()
-   * function.
-   */
-#  define TRIO_FPCLASSIFY(n) _fpclass(n)
-#  define TRIO_QUIET_NAN _FPCLASS_QNAN
-#  define TRIO_SIGNALLING_NAN _FPCLASS_SNAN
-#  define TRIO_POSITIVE_INFINITY _FPCLASS_PINF
-#  define TRIO_NEGATIVE_INFINITY _FPCLASS_NINF
-#  define TRIO_POSITIVE_SUBNORMAL _FPCLASS_PD
-#  define TRIO_NEGATIVE_SUBNORMAL _FPCLASS_ND
-#  define TRIO_POSITIVE_ZERO _FPCLASS_PZ
-#  define TRIO_NEGATIVE_ZERO _FPCLASS_NZ
-#  define TRIO_POSITIVE_NORMAL _FPCLASS_PN
-#  define TRIO_NEGATIVE_NORMAL _FPCLASS_NN
+#undef INFINITY
+#undef NAN
 
-# elif defined(FP_PLUS_NORM)
-  /*
-   * HP-UX 9.x and 10.x have an fpclassify() function, that is different
-   * from the C99 fpclassify() macro supported on HP-UX 11.x.
-   *
-   * AIX has class() for C, and _class() for C++, which returns the
-   * same values as the HP-UX fpclassify() function.
-   */
-#  if defined(TRIO_PLATFORM_AIX)
-#   if defined(__cplusplus)
-#    define TRIO_FPCLASSIFY(n) _class(n)
-#   else
-#    define TRIO_FPCLASSIFY(n) class(n)
-#   endif
-#  else
-#   define TRIO_FPCLASSIFY(n) fpclassify(n)
-#  endif
-#  define TRIO_QUIET_NAN FP_QNAN
-#  define TRIO_SIGNALLING_NAN FP_SNAN
-#  define TRIO_POSITIVE_INFINITY FP_PLUS_INF
-#  define TRIO_NEGATIVE_INFINITY FP_MINUS_INF
-#  define TRIO_POSITIVE_SUBNORMAL FP_PLUS_DENORM
-#  define TRIO_NEGATIVE_SUBNORMAL FP_MINUS_DENORM
-#  define TRIO_POSITIVE_ZERO FP_PLUS_ZERO
-#  define TRIO_NEGATIVE_ZERO FP_MINUS_ZERO
-#  define TRIO_POSITIVE_NORMAL FP_PLUS_NORM
-#  define TRIO_NEGATIVE_NORMAL FP_MINUS_NORM
-# endif
+#define INFINITY Infinityd()
+#define NAN NaNd()
 
-# if defined(TRIO_FPCLASSIFY)
-  switch (TRIO_FPCLASSIFY(number)) {
-  case TRIO_QUIET_NAN:
-  case TRIO_SIGNALLING_NAN:
-    *is_negative = TRIO_FALSE; /* NaN has no sign */
-    return TRIO_FP_NAN;
-  case TRIO_POSITIVE_INFINITY:
-    *is_negative = TRIO_FALSE;
-    return TRIO_FP_INFINITE;
-  case TRIO_NEGATIVE_INFINITY:
-    *is_negative = TRIO_TRUE;
-    return TRIO_FP_INFINITE;
-  case TRIO_POSITIVE_SUBNORMAL:
-    *is_negative = TRIO_FALSE;
-    return TRIO_FP_SUBNORMAL;
-  case TRIO_NEGATIVE_SUBNORMAL:
-    *is_negative = TRIO_TRUE;
-    return TRIO_FP_SUBNORMAL;
-  case TRIO_POSITIVE_ZERO:
-    *is_negative = TRIO_FALSE;
-    return TRIO_FP_ZERO;
-  case TRIO_NEGATIVE_ZERO:
-    *is_negative = TRIO_TRUE;
-    return TRIO_FP_ZERO;
-  case TRIO_POSITIVE_NORMAL:
-    *is_negative = TRIO_FALSE;
-    return TRIO_FP_NORMAL;
-  case TRIO_NEGATIVE_NORMAL:
-    *is_negative = TRIO_TRUE;
-    return TRIO_FP_NORMAL;
-  default:
-    /* Just in case... */
-    *is_negative = (number < 0.0);
-    return TRIO_FP_NORMAL;
-  }
+#define trio_pinf() INFINITY
+#define trio_ninf() -INFINITY
+#define trio_nan() NAN
+#define trio_nzero() minus_zerod
 
-# else
-  /*
-   * Fallback solution.
-   */
-  int rc;
-
-  if (number == 0.0) {
-    /*
-     * In IEEE 754 the sign of zero is ignored in comparisons, so we
-     * have to handle this as a special case by examining the sign bit
-     * directly.
-     */
-#  if defined(USE_IEEE_754)
-    *is_negative = trio_is_negative(number);
-#  else
-    *is_negative = TRIO_FALSE; /* FIXME */
-#  endif
-    return TRIO_FP_ZERO;
-  }
-  if (trio_isnan(number)) {
-    *is_negative = TRIO_FALSE;
-    return TRIO_FP_NAN;
-  }
-  if ((rc = trio_isinf(number))) {
-    *is_negative = (rc == -1);
-    return TRIO_FP_INFINITE;
-  }
-  if ((number > 0.0) && (number < DBL_MIN)) {
-    *is_negative = TRIO_FALSE;
-    return TRIO_FP_SUBNORMAL;
-  }
-  if ((number < 0.0) && (number > -DBL_MIN)) {
-    *is_negative = TRIO_TRUE;
-    return TRIO_FP_SUBNORMAL;
-  }
-  *is_negative = (number < 0.0);
-  return TRIO_FP_NORMAL;
-
-# endif
-#endif
-}
-
-/**
-   Examine the sign of a number.
-
-   @param number An arbitrary floating-point number.
-   @return Boolean value indicating whether or not the number has the
-   sign bit set (i.e. is negative).
-*/
-TRIO_PUBLIC int
-trio_signbit
-TRIO_ARGS1((number),
-	   double number)
-{
-  int is_negative;
-
-  (void)trio_fpclassify_and_signbit(number, &is_negative);
-  return is_negative;
-}
-
-#if 0
-	/* Temporary fix - this routine is not used in libxml */
-/**
-   Examine the class of a number.
-
-   @param number An arbitrary floating-point number.
-   @return Enumerable value indicating the class of @p number
-*/
-TRIO_PUBLIC int
-trio_fpclassify
-TRIO_ARGS1((number),
-	   double number)
-{
-  int dummy;
-
-  return trio_fpclassify_and_signbit(number, &dummy);
-}
-
-#endif
-
-/** @} SpecialQuantities */
-
-/*************************************************************************
- * For test purposes.
- *
- * Add the following compiler option to include this test code.
- *
- *  Unix : -DSTANDALONE
- *  VMS  : /DEFINE=(STANDALONE)
- */
-#if defined(STANDALONE)
-# include <stdio.h>
-
-static TRIO_CONST char *
-getClassification
-TRIO_ARGS1((type),
-	   int type)
-{
-  switch (type) {
-  case TRIO_FP_INFINITE:
-    return "FP_INFINITE";
-  case TRIO_FP_NAN:
-    return "FP_NAN";
-  case TRIO_FP_NORMAL:
-    return "FP_NORMAL";
-  case TRIO_FP_SUBNORMAL:
-    return "FP_SUBNORMAL";
-  case TRIO_FP_ZERO:
-    return "FP_ZERO";
-  default:
-    return "FP_UNKNOWN";
-  }
-}
-
-static void
-print_class
-TRIO_ARGS2((prefix, number),
-	   TRIO_CONST char *prefix,
-	   double number)
-{
-  printf("%-6s: %s %-15s %g\n",
-	 prefix,
-	 trio_signbit(number) ? "-" : "+",
-	 getClassification(TRIO_FPCLASSIFY(number)),
-	 number);
-}
-
-int main(TRIO_NOARGS)
-{
-  double my_nan;
-  double my_pinf;
-  double my_ninf;
-# if defined(TRIO_PLATFORM_UNIX)
-  void (*signal_handler) TRIO_PROTO((int));
-# endif
-
-  my_nan = trio_nan();
-  my_pinf = trio_pinf();
-  my_ninf = trio_ninf();
-
-  print_class("Nan", my_nan);
-  print_class("PInf", my_pinf);
-  print_class("NInf", my_ninf);
-  print_class("PZero", 0.0);
-  print_class("NZero", -0.0);
-  print_class("PNorm", 1.0);
-  print_class("NNorm", -1.0);
-  print_class("PSub", 1.01e-307 - 1.00e-307);
-  print_class("NSub", 1.00e-307 - 1.01e-307);
-
-  printf("NaN : %4g 0x%02x%02x%02x%02x%02x%02x%02x%02x (%2d, %2d)\n",
-	 my_nan,
-	 ((unsigned char *)&my_nan)[0],
-	 ((unsigned char *)&my_nan)[1],
-	 ((unsigned char *)&my_nan)[2],
-	 ((unsigned char *)&my_nan)[3],
-	 ((unsigned char *)&my_nan)[4],
-	 ((unsigned char *)&my_nan)[5],
-	 ((unsigned char *)&my_nan)[6],
-	 ((unsigned char *)&my_nan)[7],
-	 trio_isnan(my_nan), trio_isinf(my_nan));
-  printf("PInf: %4g 0x%02x%02x%02x%02x%02x%02x%02x%02x (%2d, %2d)\n",
-	 my_pinf,
-	 ((unsigned char *)&my_pinf)[0],
-	 ((unsigned char *)&my_pinf)[1],
-	 ((unsigned char *)&my_pinf)[2],
-	 ((unsigned char *)&my_pinf)[3],
-	 ((unsigned char *)&my_pinf)[4],
-	 ((unsigned char *)&my_pinf)[5],
-	 ((unsigned char *)&my_pinf)[6],
-	 ((unsigned char *)&my_pinf)[7],
-	 trio_isnan(my_pinf), trio_isinf(my_pinf));
-  printf("NInf: %4g 0x%02x%02x%02x%02x%02x%02x%02x%02x (%2d, %2d)\n",
-	 my_ninf,
-	 ((unsigned char *)&my_ninf)[0],
-	 ((unsigned char *)&my_ninf)[1],
-	 ((unsigned char *)&my_ninf)[2],
-	 ((unsigned char *)&my_ninf)[3],
-	 ((unsigned char *)&my_ninf)[4],
-	 ((unsigned char *)&my_ninf)[5],
-	 ((unsigned char *)&my_ninf)[6],
-	 ((unsigned char *)&my_ninf)[7],
-	 trio_isnan(my_ninf), trio_isinf(my_ninf));
-
-# if defined(TRIO_PLATFORM_UNIX)
-  signal_handler = signal(SIGFPE, SIG_IGN);
-# endif
-
-  my_pinf = DBL_MAX + DBL_MAX;
-  my_ninf = -my_pinf;
-  my_nan = my_pinf / my_pinf;
-
-# if defined(TRIO_PLATFORM_UNIX)
-  signal(SIGFPE, signal_handler);
-# endif
-
-  printf("NaN : %4g 0x%02x%02x%02x%02x%02x%02x%02x%02x (%2d, %2d)\n",
-	 my_nan,
-	 ((unsigned char *)&my_nan)[0],
-	 ((unsigned char *)&my_nan)[1],
-	 ((unsigned char *)&my_nan)[2],
-	 ((unsigned char *)&my_nan)[3],
-	 ((unsigned char *)&my_nan)[4],
-	 ((unsigned char *)&my_nan)[5],
-	 ((unsigned char *)&my_nan)[6],
-	 ((unsigned char *)&my_nan)[7],
-	 trio_isnan(my_nan), trio_isinf(my_nan));
-  printf("PInf: %4g 0x%02x%02x%02x%02x%02x%02x%02x%02x (%2d, %2d)\n",
-	 my_pinf,
-	 ((unsigned char *)&my_pinf)[0],
-	 ((unsigned char *)&my_pinf)[1],
-	 ((unsigned char *)&my_pinf)[2],
-	 ((unsigned char *)&my_pinf)[3],
-	 ((unsigned char *)&my_pinf)[4],
-	 ((unsigned char *)&my_pinf)[5],
-	 ((unsigned char *)&my_pinf)[6],
-	 ((unsigned char *)&my_pinf)[7],
-	 trio_isnan(my_pinf), trio_isinf(my_pinf));
-  printf("NInf: %4g 0x%02x%02x%02x%02x%02x%02x%02x%02x (%2d, %2d)\n",
-	 my_ninf,
-	 ((unsigned char *)&my_ninf)[0],
-	 ((unsigned char *)&my_ninf)[1],
-	 ((unsigned char *)&my_ninf)[2],
-	 ((unsigned char *)&my_ninf)[3],
-	 ((unsigned char *)&my_ninf)[4],
-	 ((unsigned char *)&my_ninf)[5],
-	 ((unsigned char *)&my_ninf)[6],
-	 ((unsigned char *)&my_ninf)[7],
-	 trio_isnan(my_ninf), trio_isinf(my_ninf));
-
-  return 0;
-}
-#endif
+#define trio_isnan(x) isnan(x)
+#define trio_isinf(x) isinf(x)
+#define trio_signbit(x) signbit(x)
diff --git a/gnulib-local/lib/libxml/trionan.h b/gnulib-local/lib/libxml/trionan.h
deleted file mode 100644
index be6e718..0000000
--- a/gnulib-local/lib/libxml/trionan.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/*************************************************************************
- *
- * $Id$
- *
- * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
- * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
- *
- ************************************************************************/
-
-#ifndef TRIO_NAN_H
-#define TRIO_NAN_H
-
-#include "triodef.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-enum {
-  TRIO_FP_INFINITE,
-  TRIO_FP_NAN,
-  TRIO_FP_NORMAL,
-  TRIO_FP_SUBNORMAL,
-  TRIO_FP_ZERO
-};
-
-/*
- * Return NaN (Not-a-Number).
- */
-TRIO_PUBLIC double trio_nan TRIO_PROTO((void));
-
-/*
- * Return positive infinity.
- */
-TRIO_PUBLIC double trio_pinf TRIO_PROTO((void));
-
-/*
- * Return negative infinity.
- */
-TRIO_PUBLIC double trio_ninf TRIO_PROTO((void));
-
-/*
- * Return negative zero.
- */
-TRIO_PUBLIC double trio_nzero TRIO_PROTO((TRIO_NOARGS));
-
-/*
- * If number is a NaN return non-zero, otherwise return zero.
- */
-TRIO_PUBLIC int trio_isnan TRIO_PROTO((double number));
-
-/*
- * If number is positive infinity return 1, if number is negative
- * infinity return -1, otherwise return 0.
- */
-TRIO_PUBLIC int trio_isinf TRIO_PROTO((double number));
-
-/*
- * If number is finite return non-zero, otherwise return zero.
- */
-#if 0
-	/* Temporary fix - these 2 routines not used in libxml */
-TRIO_PUBLIC int trio_isfinite TRIO_PROTO((double number));
-
-TRIO_PUBLIC int trio_fpclassify TRIO_PROTO((double number));
-#endif
-
-TRIO_PUBLIC int trio_signbit TRIO_PROTO((double number));
-
-TRIO_PUBLIC int trio_fpclassify_and_signbit TRIO_PROTO((double number, int *is_negative));
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* TRIO_NAN_H */
diff --git a/gnulib-local/modules/libxml b/gnulib-local/modules/libxml
index 152326b..47dce43 100644
--- a/gnulib-local/modules/libxml
+++ b/gnulib-local/modules/libxml
@@ -61,9 +61,7 @@ lib/libxml/threads.in.h
 lib/libxml/timsort.h
 lib/libxml/tree.c
 lib/libxml/tree.in.h
-lib/libxml/triodef.h
 lib/libxml/trionan.c
-lib/libxml/trionan.h
 lib/libxml/uri.c
 lib/libxml/uri.in.h
 lib/libxml/valid.c
@@ -112,6 +110,9 @@ stdarg
 snprintf
 vsnprintf
 no-c++
+isinf
+isnan
+signbit
 
 configure.ac:
 gl_LIBXML
@@ -155,8 +156,6 @@ libxml_rpl_la_SOURCES = \
   libxml/threads.c \
   libxml/timsort.h \
   libxml/tree.c \
-  libxml/triodef.h \
-  libxml/trionan.h \
   libxml/trionan.c \
   libxml/uri.c \
   libxml/valid.c \