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extern/stdcxx/4.2.1/tests/include/valcmp.h

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+/************************************************************************
+ *
+ * valcmp.h - declarations of the rw_valcmp() family of helper functions
+ *
+ * $Id: valcmp.h 550991 2007-06-26 23:58:07Z sebor $
+ *
+ ************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 1994-2006 Rogue Wave Software.
+ * 
+ **************************************************************************/
+
+#ifndef RW_VALCMP_H_INCLUDED
+#define RW_VALCMP_H_INCLUDED
+
+#include <testdefs.h>
+
+
+#define CMP_NULTERM   1   /* the first 0 terminates processing */
+#define CMP_RETOFF    2   /* return offset of the first mismatch */
+#define CMP_NOCASE    4   /* case-insensitive character comparison */
+#define CMP_FP        8   /* safe floating pointing comparison */
+
+
+_TEST_EXPORT int
+rw_valcmp (const void*, const void*,
+           _RWSTD_SIZE_T, _RWSTD_SIZE_T, _RWSTD_SIZE_T, int);
+
+/**
+ * Compares the contents of two arrays of objects of integral types,
+ * possibly of different sizes, for equality, in a strncmp/memcmp
+ * way.
+ *
+ * @param buf1  Pointer to an array of 0 or more objects of integral type.
+ * @param buf2  Pointer to an array of 0 or more objects of integral type.
+ * @param nelems  The maximum number of elements to compare.
+ * @param flags  Bitmap of flags that determine how the objects are
+ *               compared.
+ * @return  Returns -1, 0, or +1, depending on whether the first array
+ *          is less than, equal to, or greater than the second array.
+ */
+
+template <class T, class U>
+inline int
+rw_valcmp (const T*      buf1,
+           const U*      buf2,
+           _RWSTD_SIZE_T nelems,
+           int           flags = 0)
+{
+    return rw_valcmp (buf1, buf2, nelems, sizeof (T), sizeof (U), flags);
+}
+
+
+/**************************************************************************/
+
+// compares up to a maximum number of characters from the two strings
+// posisbly including any embedded NULs (when the cmp_nul bit is set)
+// and returns -1, 0, or +1 if the first string compares less, equal,
+// or greater, respectively, than the second string, or the offset+1
+// of the first mismatched character (when the cmp_off bit is set)
+// or 0 otherwise
+//
+// rw_strncmp(s1, s2) is equivalent to a call to strcmp(s1, s2) when
+// the type of s1 and s2 is char*, wcscmp(s1, s2) when the type is
+// wchar_t*
+//
+// rw_strncmp(s1, s2, n) with (n != ~0U) is equivalent to a call to
+// strncmp(s1, s2, n) or wcsncmp(s1, s2, n), respectively
+//
+// rw_strncmp(s1, s2, n, cmp_nul) with (n != ~0U) is equivalent to
+// a call to memcmp(s1, s2, n) or wmemcmp(s1, s2, n), respectively
+
+_TEST_EXPORT int
+rw_strncmp (const char*, const char*,
+            _RWSTD_SIZE_T = _RWSTD_SIZE_MAX, int = CMP_NULTERM);
+
+#ifndef _RWSTD_NO_WCHAR_T
+
+_TEST_EXPORT int
+rw_strncmp (const char*, const wchar_t*,
+            _RWSTD_SIZE_T = _RWSTD_SIZE_MAX, int = CMP_NULTERM);
+
+_TEST_EXPORT int
+rw_strncmp (const wchar_t*, const char*,
+            _RWSTD_SIZE_T = _RWSTD_SIZE_MAX, int = CMP_NULTERM);
+
+_TEST_EXPORT int
+rw_strncmp (const wchar_t*, const wchar_t*,
+            _RWSTD_SIZE_T = _RWSTD_SIZE_MAX, int = CMP_NULTERM);
+
+#endif   // _RWSTD_NO_WCHAR_T
+
+
+/**
+ * Compares two floating point numbers for equality.
+ *
+ * @param x  The left hand side of the comparison.
+ * @param y  The right hand side of the comparison.
+ *
+ * @return  Returns a negative value, 0, or a positive value, depending
+ *          on whether the first number is less than, equal to, or greater
+ *          than the second number. The magnitude of the returned value
+ *          indicates the number of distinct values representable in
+ *          the type of the number between the two arguments.
+ */
+_TEST_EXPORT int
+rw_fltcmp (float x, float y);
+
+
+/**
+ * @see rw_fltcmp.
+ */
+_TEST_EXPORT int
+rw_dblcmp (double x, double y);
+
+#ifndef _RWSTD_NO_LONG_DOUBLE
+
+/**
+ * @see rw_fltcmp.
+ */
+_TEST_EXPORT int
+rw_ldblcmp (long double x, long double y);
+
+#endif   // _RWSTD_NO_LONG_DOUBLE
+
+/**************************************************************************/
+
+/**
+ * Compares two values of the same type for equality.
+ *
+ * @param x  The left hand side of the comparison.
+ * @param y  The right hand side of the comparison.
+ *
+ * @return  Returns 1 if the the values are the same, 0 otherwise.
+ */
+template <class T>
+inline int rw_equal (T x, T y)
+{
+    return x == y;
+}
+
+/**
+ * @see rw_equal.
+ */
+inline int rw_equal (float x, float y)
+{
+    return 0 == rw_fltcmp (x, y);
+}
+
+/**
+ * @see rw_equal.
+ */
+inline int rw_equal (double x, double y)
+{
+    return 0 == rw_dblcmp (x, y);
+}
+
+#ifndef _RWSTD_NO_LONG_DOUBLE
+
+/**
+ * @see rw_equal.
+ */
+inline int rw_equal (long double x, long double y)
+{
+    return 0 == rw_ldblcmp (x, y);
+}
+
+#endif   // _RWSTD_NO_LONG_DOUBLE
+
+#endif   // RW_VALCMP_H_INCLUDED