/src/icu/icu4c/source/common/putilimp.h

Source (jump to first uncovered line)
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
*   Copyright (C) 1997-2016, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
******************************************************************************
*
*  FILE NAME : putilimp.h
*
*   Date        Name        Description
*   10/17/04    grhoten     Move internal functions from putil.h to this file.
******************************************************************************
*/

#ifndef PUTILIMP_H
#define PUTILIMP_H

#include "unicode/utypes.h"
#include "unicode/putil.h"

/**
 * \def U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
 * Nearly all CPUs and compilers implement a right-shift of a signed integer
 * as an Arithmetic Shift Right which copies the sign bit (the Most Significant Bit (MSB))
 * into the vacated bits (sign extension).
 * For example, (int32_t)0xfff5fff3>>4 becomes 0xffff5fff and -1>>1=-1.
 *
 * This can be useful for storing a signed value in the upper bits
 * and another bit field in the lower bits.
 * The signed value can be retrieved by simple right-shifting.
 *
 * This is consistent with the Java language.
 *
 * However, the C standard allows compilers to implement a right-shift of a signed integer
 * as a Logical Shift Right which copies a 0 into the vacated bits.
 * For example, (int32_t)0xfff5fff3>>4 becomes 0x0fff5fff and -1>>1=0x7fffffff.
 *
 * Code that depends on the natural behavior should be guarded with this macro,
 * with an alternate path for unusual platforms.
 * @internal
 */
#ifdef U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
    /* Use the predefined value. */
#else
    /*
     * Nearly all CPUs & compilers implement a right-shift of a signed integer
     * as an Arithmetic Shift Right (with sign extension).
     */
#   define U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 1
#endif

/** Define this to 1 if your platform supports IEEE 754 floating point,
   to 0 if it does not. */
#ifndef IEEE_754
#   define IEEE_754 1
#endif

/**
 * uintptr_t is an optional part of the standard definitions in stdint.h.
 * The opengroup.org documentation for stdint.h says
 * "On XSI-conformant systems, the intptr_t and uintptr_t types are required;
 * otherwise, they are optional."
 * We assume that when uintptr_t is defined, UINTPTR_MAX is defined as well.
 *
 * Do not use ptrdiff_t since it is signed. size_t is unsigned.
 */
/* TODO: This check fails on some z environments. Filed a ticket #9357 for this. */
#if !defined(__intptr_t_defined) && !defined(UINTPTR_MAX) && (U_PLATFORM != U_PF_OS390)
typedef size_t uintptr_t;
#endif

/*===========================================================================*/
/** @{ Information about POSIX support                                       */
/*===========================================================================*/

#ifdef U_HAVE_NL_LANGINFO_CODESET
    /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API || U_PLATFORM == U_PF_ANDROID || U_PLATFORM == U_PF_QNX
#   define U_HAVE_NL_LANGINFO_CODESET 0
#else
#   define U_HAVE_NL_LANGINFO_CODESET 1
#endif

#ifdef U_NL_LANGINFO_CODESET
    /* Use the predefined value. */
#elif !U_HAVE_NL_LANGINFO_CODESET
#   define U_NL_LANGINFO_CODESET -1
#elif U_PLATFORM == U_PF_OS400
   /* not defined */
#elif U_PLATFORM == U_PF_HAIKU
   /* not defined */
#else
#   define U_NL_LANGINFO_CODESET CODESET
#endif

#if defined(U_TZSET) || defined(U_HAVE_TZSET)
    /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
    // UWP doesn't support tzset or environment variables for tz
#if U_PLATFORM_HAS_WINUWP_API == 0
#   define U_TZSET _tzset
#endif
#elif U_PLATFORM == U_PF_OS400
   /* not defined */
#elif U_PLATFORM == U_PF_HAIKU
   /* not defined */
#else
#   define U_TZSET tzset
#endif

#if defined(U_TIMEZONE) || defined(U_HAVE_TIMEZONE)
    /* Use the predefined value. */
#elif U_PLATFORM == U_PF_ANDROID
#   define U_TIMEZONE timezone
#elif defined(__UCLIBC__)
    // uClibc does not have __timezone or _timezone.
#elif defined(_NEWLIB_VERSION)
#   define U_TIMEZONE _timezone
#elif defined(__GLIBC__)
    // glibc
#   define U_TIMEZONE __timezone
#elif U_PLATFORM_IS_LINUX_BASED
    // not defined
#elif U_PLATFORM_USES_ONLY_WIN32_API
#   define U_TIMEZONE _timezone
#elif U_PLATFORM == U_PF_BSD && !defined(__NetBSD__)
   /* not defined */
#elif U_PLATFORM == U_PF_OS400
   /* not defined */
#elif U_PLATFORM == U_PF_IPHONE
   /* not defined */
#else
#   define U_TIMEZONE timezone
#endif

#if defined(U_TZNAME) || defined(U_HAVE_TZNAME)
    /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
    /* not usable on all windows platforms */
#if U_PLATFORM_HAS_WINUWP_API == 0
#   define U_TZNAME _tzname
#endif
#elif U_PLATFORM == U_PF_OS400
   /* not defined */
#elif U_PLATFORM == U_PF_HAIKU
    /* not defined, (well it is but a loop back to icu) */
#else
#   define U_TZNAME tzname
#endif

#ifdef U_HAVE_MMAP
    /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
#   define U_HAVE_MMAP 0
#else
#   define U_HAVE_MMAP 1
#endif

#ifdef U_HAVE_POPEN
    /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
#   define U_HAVE_POPEN 0
#elif U_PLATFORM == U_PF_OS400
#   define U_HAVE_POPEN 0
#else
#   define U_HAVE_POPEN 1
#endif

/**
 * \def U_HAVE_DIRENT_H
 * Defines whether dirent.h is available.
 * @internal
 */
#ifdef U_HAVE_DIRENT_H
    /* Use the predefined value. */
#elif U_PLATFORM_USES_ONLY_WIN32_API
#   define U_HAVE_DIRENT_H 0
#else
#   define U_HAVE_DIRENT_H 1
#endif

/** @} */

/*===========================================================================*/
/** @{ Programs used by ICU code                                             */
/*===========================================================================*/

/**
 * \def U_MAKE_IS_NMAKE
 * Defines whether the "make" program is Windows nmake.
 */
#ifdef U_MAKE_IS_NMAKE
    /* Use the predefined value. */
#elif U_PLATFORM == U_PF_WINDOWS
#   define U_MAKE_IS_NMAKE 1
#else
#   define U_MAKE_IS_NMAKE 0
#endif

/** @} */

/*==========================================================================*/
/* Platform utilities                                                       */
/*==========================================================================*/

/**
 * Platform utilities isolates the platform dependencies of the
 * library.  For each platform which this code is ported to, these
 * functions may have to be re-implemented.
 */

/**
 * Floating point utility to determine if a double is Not a Number (NaN).
 * @internal
 */
U_CAPI UBool   U_EXPORT2 uprv_isNaN(double d);
/**
 * Floating point utility to determine if a double has an infinite value.
 * @internal
 */
U_CAPI UBool   U_EXPORT2 uprv_isInfinite(double d);
/**
 * Floating point utility to determine if a double has a positive infinite value.
 * @internal
 */
U_CAPI UBool   U_EXPORT2 uprv_isPositiveInfinity(double d);
/**
 * Floating point utility to determine if a double has a negative infinite value.
 * @internal
 */
U_CAPI UBool   U_EXPORT2 uprv_isNegativeInfinity(double d);
/**
 * Floating point utility that returns a Not a Number (NaN) value.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_getNaN(void);
/**
 * Floating point utility that returns an infinite value.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_getInfinity(void);

/**
 * Floating point utility to truncate a double.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_trunc(double d);
/**
 * Floating point utility to calculate the floor of a double.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_floor(double d);
/**
 * Floating point utility to calculate the ceiling of a double.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_ceil(double d);
/**
 * Floating point utility to calculate the absolute value of a double.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_fabs(double d);
/**
 * Floating point utility to calculate the fractional and integer parts of a double.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_modf(double d, double* pinteger);
/**
 * Floating point utility to calculate the remainder of a double divided by another double.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_fmod(double d, double y);
/**
 * Floating point utility to calculate d to the power of exponent (d^exponent).
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_pow(double d, double exponent);
/**
 * Floating point utility to calculate 10 to the power of exponent (10^exponent).
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_pow10(int32_t exponent);
/**
 * Floating point utility to calculate the maximum value of two doubles.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_fmax(double d, double y);
/**
 * Floating point utility to calculate the minimum value of two doubles.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_fmin(double d, double y);
/**
 * Private utility to calculate the maximum value of two integers.
 * @internal
 */
U_CAPI int32_t U_EXPORT2 uprv_max(int32_t d, int32_t y);
/**
 * Private utility to calculate the minimum value of two integers.
 * @internal
 */
U_CAPI int32_t U_EXPORT2 uprv_min(int32_t d, int32_t y);

#if U_IS_BIG_ENDIAN
#   define uprv_isNegative(number) (*((signed char *)&(number))<0)
#else
#   define uprv_isNegative(number) (*((signed char *)&(number)+sizeof(number)-1)<0)
#endif

/**
 * Return the largest positive number that can be represented by an integer
 * type of arbitrary bit length.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_maxMantissa(void);

/**
 * Floating point utility to calculate the logarithm of a double.
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_log(double d);

/**
 * Does common notion of rounding e.g. uprv_floor(x + 0.5);
 * @param x the double number
 * @return the rounded double
 * @internal
 */
U_CAPI double  U_EXPORT2 uprv_round(double x);

/**
 * Adds the signed integers a and b, storing the result in res.
 * Checks for signed integer overflow.
 * Similar to the GCC/Clang extension __builtin_add_overflow
 *
 * @param a The first operand.
 * @param b The second operand.
 * @param res a + b
 * @return true if overflow occurred; false if no overflow occurred.
 * @internal
 */
U_CAPI UBool U_EXPORT2 uprv_add32_overflow(int32_t a, int32_t b, int32_t* res);

/**
 * Multiplies the signed integers a and b, storing the result in res.
 * Checks for signed integer overflow.
 * Similar to the GCC/Clang extension __builtin_mul_overflow
 *
 * @param a The first multiplicand.
 * @param b The second multiplicand.
 * @param res a * b
 * @return true if overflow occurred; false if no overflow occurred.
 * @internal
 */
U_CAPI UBool U_EXPORT2 uprv_mul32_overflow(int32_t a, int32_t b, int32_t* res);

#if 0
/**
 * Returns the number of digits after the decimal point in a double number x.
 *
 * @param x the double number
 * @return the number of digits after the decimal point in a double number x.
 * @internal
 */
/*U_CAPI int32_t  U_EXPORT2 uprv_digitsAfterDecimal(double x);*/
#endif

#if !U_CHARSET_IS_UTF8
/**
 * Please use ucnv_getDefaultName() instead.
 * Return the default codepage for this platform and locale.
 * This function can call setlocale() on Unix platforms. Please read the
 * platform documentation on setlocale() before calling this function.
 * @return the default codepage for this platform
 * @internal
 */
U_CAPI const char*  U_EXPORT2 uprv_getDefaultCodepage(void);
#endif

/**
 * Please use uloc_getDefault() instead.
 * Return the default locale ID string by querying the system, or
 *     zero if one cannot be found.
 * This function can call setlocale() on Unix platforms. Please read the
 * platform documentation on setlocale() before calling this function.
 * @return the default locale ID string
 * @internal
 */
U_CAPI const char*  U_EXPORT2 uprv_getDefaultLocaleID(void);

/**
 * Time zone utilities
 *
 * Wrappers for C runtime library functions relating to timezones.
 * The t_tzset() function (similar to tzset) uses the current setting
 * of the environment variable TZ to assign values to three global
 * variables: daylight, timezone, and tzname. These variables have the
 * following meanings, and are declared in &lt;time.h&gt;.
 *
 *   daylight   Nonzero if daylight-saving-time zone (DST) is specified
 *              in TZ; otherwise, 0. Default value is 1.
 *   timezone   Difference in seconds between coordinated universal
 *              time and local time. E.g., -28,800 for PST (GMT-8hrs)
 *   tzname(0)  Three-letter time-zone name derived from TZ environment
 *              variable. E.g., "PST".
 *   tzname(1)  Three-letter DST zone name derived from TZ environment
 *              variable.  E.g., "PDT". If DST zone is omitted from TZ,
 *              tzname(1) is an empty string.
 *
 * Notes: For example, to set the TZ environment variable to correspond
 * to the current time zone in Germany, you can use one of the
 * following statements:
 *
 *   set TZ=GST1GDT
 *   set TZ=GST+1GDT
 *
 * If the TZ value is not set, t_tzset() attempts to use the time zone
 * information specified by the operating system. Under Windows NT
 * and Windows 95, this information is specified in the Control Panel's
 * Date/Time application.
 * @internal
 */
U_CAPI void     U_EXPORT2 uprv_tzset(void);

/**
 * Difference in seconds between coordinated universal
 * time and local time. E.g., -28,800 for PST (GMT-8hrs)
 * @return the difference in seconds between coordinated universal time and local time.
 * @internal
 */
U_CAPI int32_t  U_EXPORT2 uprv_timezone(void);

/**
 *   tzname(0)  Three-letter time-zone name derived from TZ environment
 *              variable. E.g., "PST".
 *   tzname(1)  Three-letter DST zone name derived from TZ environment
 *              variable.  E.g., "PDT". If DST zone is omitted from TZ,
 *              tzname(1) is an empty string.
 * @internal
 */
U_CAPI const char* U_EXPORT2 uprv_tzname(int n);

/**
 * Reset the global tzname cache.
 * @internal
 */
U_CAPI void uprv_tzname_clear_cache(void);

/**
 * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970.
 * This function is affected by 'faketime' and should be the bottleneck for all user-visible ICU time functions.
 * @return the UTC time measured in milliseconds
 * @internal
 */
U_CAPI UDate U_EXPORT2 uprv_getUTCtime(void);

/**
 * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970.
 * This function is not affected by 'faketime', so it should only be used by low level test functions- not by anything that
 * exposes time to the end user.
 * @return the UTC time measured in milliseconds
 * @internal
 */
U_CAPI UDate U_EXPORT2 uprv_getRawUTCtime(void);

/**
 * Determine whether a pathname is absolute or not, as defined by the platform.
 * @param path Pathname to test
 * @return true if the path is absolute
 * @internal (ICU 3.0)
 */
U_CAPI UBool U_EXPORT2 uprv_pathIsAbsolute(const char *path);

/**
 * Use U_MAX_PTR instead of this function.
 * @param void pointer to test
 * @return the largest possible pointer greater than the base
 * @internal (ICU 3.8)
 */
U_CAPI void * U_EXPORT2 uprv_maximumPtr(void *base);

/**
 * Maximum value of a (void*) - use to indicate the limit of an 'infinite' buffer.
 * In fact, buffer sizes must not exceed 2GB so that the difference between
 * the buffer limit and the buffer start can be expressed in an int32_t.
 *
 * The definition of U_MAX_PTR must fulfill the following conditions:
 * - return the largest possible pointer greater than base
 * - return a valid pointer according to the machine architecture (AS/400, 64-bit, etc.)
 * - avoid wrapping around at high addresses
 * - make sure that the returned pointer is not farther from base than 0x7fffffff bytes
 *
 * @param base The beginning of a buffer to find the maximum offset from
 * @internal
 */
#ifndef U_MAX_PTR
#  if U_PLATFORM == U_PF_OS390 && !defined(_LP64)
    /* We have 31-bit pointers. */
#    define U_MAX_PTR(base) ((void *)0x7fffffff)
#  elif U_PLATFORM == U_PF_OS400
#    define U_MAX_PTR(base) uprv_maximumPtr((void *)base)
#  elif 0
    /*
     * For platforms where pointers are scalar values (which is normal, but unlike i5/OS)
     * but that do not define uintptr_t.
     *
     * However, this does not work on modern compilers:
     * The C++ standard does not define pointer overflow, and allows compilers to
     * assume that p+u>p for any pointer p and any integer u>0.
     * Thus, modern compilers optimize away the ">" comparison.
     * (See ICU tickets #7187 and #8096.)
     */
#    define U_MAX_PTR(base) \
    ((void *)(((char *)(base)+0x7fffffffu) > (char *)(base) \
        ? ((char *)(base)+0x7fffffffu) \
        : (char *)-1))
#  else
    /* Default version. C++ standard compliant for scalar pointers. */
#    define U_MAX_PTR(base) \
    ((void *)(((uintptr_t)(base)+0x7fffffffu) > (uintptr_t)(base) \
        ? ((uintptr_t)(base)+0x7fffffffu) \
        : (uintptr_t)-1))
#  endif
#endif


#ifdef __cplusplus
/**
 * Pin a buffer capacity such that doing pointer arithmetic
 * on the destination pointer and capacity cannot overflow.
 *
 * The pinned capacity must fulfill the following conditions (for positive capacities):
 *   - dest + capacity is a valid pointer according to the machine architecture (AS/400, 64-bit, etc.)
 *   - (dest + capacity) >= dest
 *   - The size (in bytes) of T[capacity] does not exceed 0x7fffffff
 *
 * @param dest the destination buffer pointer.
 * @param capacity the requested buffer capacity, in units of type T.
 * @return the pinned capacity.
 * @internal
 */
template <typename T>
inline int32_t pinCapacity(T *dest, int32_t capacity) {
    if (capacity <= 0) { return capacity; }

    uintptr_t destInt = (uintptr_t)dest;
    uintptr_t maxInt;

#  if U_PLATFORM == U_PF_OS390 && !defined(_LP64)
    // We have 31-bit pointers.
    maxInt = 0x7fffffff;
#  elif U_PLATFORM == U_PF_OS400
    maxInt = (uintptr_t)uprv_maximumPtr((void *)dest);
#  else
    maxInt = destInt + 0x7fffffffu;
    if (maxInt < destInt) {
        // Less than 2GB to the end of the address space.
        // Pin to that to prevent address overflow.
        maxInt = static_cast<uintptr_t>(-1);
    }
#  endif

    uintptr_t maxBytes = maxInt - destInt;  // max. 2GB
    int32_t maxCapacity = (int32_t)(maxBytes / sizeof(T));
    return capacity <= maxCapacity ? capacity : maxCapacity;
}
#endif   // __cplusplus

/*  Dynamic Library Functions */

typedef void (UVoidFunction)(void);

#if U_ENABLE_DYLOAD
/**
 * Load a library
 * @internal (ICU 4.4)
 */
U_CAPI void * U_EXPORT2 uprv_dl_open(const char *libName, UErrorCode *status);

/**
 * Close a library
 * @internal (ICU 4.4)
 */
U_CAPI void U_EXPORT2 uprv_dl_close( void *lib, UErrorCode *status);

/**
 * Extract a symbol from a library (function)
 * @internal (ICU 4.8)
 */
U_CAPI UVoidFunction* U_EXPORT2 uprv_dlsym_func( void *lib, const char *symbolName, UErrorCode *status);

/**
 * Extract a symbol from a library (function)
 * Not implemented, no clients.
 * @internal
 */
/* U_CAPI void * U_EXPORT2 uprv_dlsym_data( void *lib, const char *symbolName, UErrorCode *status); */

#endif

/**
 * Define malloc and related functions
 * @internal
 */
#if U_PLATFORM == U_PF_OS400
# define uprv_default_malloc(x) _C_TS_malloc(x)
# define uprv_default_realloc(x,y) _C_TS_realloc(x,y)
# define uprv_default_free(x) _C_TS_free(x)
/* also _C_TS_calloc(x) */
#else
/* C defaults */
# define uprv_default_malloc(x) malloc(x)
# define uprv_default_realloc(x,y) realloc(x,y)
# define uprv_default_free(x) free(x)
#endif


#endif

Coverage Report

Created: 2025-09-05 07:16

Line	Count	Source (jump to first uncovered line)
1		// © 2016 and later: Unicode, Inc. and others.
2		// License & terms of use: http://www.unicode.org/copyright.html
3		/*
4		******************************************************************************
5		*
6		* Copyright (C) 1997-2016, International Business Machines
7		* Corporation and others. All Rights Reserved.
8		*
9		******************************************************************************
10		*
11		* FILE NAME : putilimp.h
12		*
13		* Date Name Description
14		* 10/17/04 grhoten Move internal functions from putil.h to this file.
15		******************************************************************************
16		*/
17
18		#ifndef PUTILIMP_H
19		#define PUTILIMP_H
20
21		#include "unicode/utypes.h"
22		#include "unicode/putil.h"
23
24		/**
25		* \def U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
26		* Nearly all CPUs and compilers implement a right-shift of a signed integer
27		* as an Arithmetic Shift Right which copies the sign bit (the Most Significant Bit (MSB))
28		* into the vacated bits (sign extension).
29		* For example, (int32_t)0xfff5fff3>>4 becomes 0xffff5fff and -1>>1=-1.
30		*
31		* This can be useful for storing a signed value in the upper bits
32		* and another bit field in the lower bits.
33		* The signed value can be retrieved by simple right-shifting.
34		*
35		* This is consistent with the Java language.
36		*
37		* However, the C standard allows compilers to implement a right-shift of a signed integer
38		* as a Logical Shift Right which copies a 0 into the vacated bits.
39		* For example, (int32_t)0xfff5fff3>>4 becomes 0x0fff5fff and -1>>1=0x7fffffff.
40		*
41		* Code that depends on the natural behavior should be guarded with this macro,
42		* with an alternate path for unusual platforms.
43		* @internal
44		*/
45		#ifdef U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC
46		/* Use the predefined value. */
47		#else
48		/*
49		* Nearly all CPUs & compilers implement a right-shift of a signed integer
50		* as an Arithmetic Shift Right (with sign extension).
51		*/
52		# define U_SIGNED_RIGHT_SHIFT_IS_ARITHMETIC 1
53		#endif
54
55		/** Define this to 1 if your platform supports IEEE 754 floating point,
56		to 0 if it does not. */
57		#ifndef IEEE_754
58	0	# define IEEE_754 1
59		#endif
60
61		/**
62		* uintptr_t is an optional part of the standard definitions in stdint.h.
63		* The opengroup.org documentation for stdint.h says
64		* "On XSI-conformant systems, the intptr_t and uintptr_t types are required;
65		* otherwise, they are optional."
66		* We assume that when uintptr_t is defined, UINTPTR_MAX is defined as well.
67		*
68		* Do not use ptrdiff_t since it is signed. size_t is unsigned.
69		*/
70		/* TODO: This check fails on some z environments. Filed a ticket #9357 for this. */
71		#if !defined(__intptr_t_defined) && !defined(UINTPTR_MAX) && (U_PLATFORM != U_PF_OS390)
72		typedef size_t uintptr_t;
73		#endif
74
75		/===========================================================================/
76		/** @{ Information about POSIX support */
77		/===========================================================================/
78
79		#ifdef U_HAVE_NL_LANGINFO_CODESET
80		/* Use the predefined value. */
81		#elif U_PLATFORM_USES_ONLY_WIN32_API \|\| U_PLATFORM == U_PF_ANDROID \|\| U_PLATFORM == U_PF_QNX
82		# define U_HAVE_NL_LANGINFO_CODESET 0
83		#else
84		# define U_HAVE_NL_LANGINFO_CODESET 1
85		#endif
86
87		#ifdef U_NL_LANGINFO_CODESET
88		/* Use the predefined value. */
89		#elif !U_HAVE_NL_LANGINFO_CODESET
90		# define U_NL_LANGINFO_CODESET -1
91		#elif U_PLATFORM == U_PF_OS400
92		/* not defined */
93		#elif U_PLATFORM == U_PF_HAIKU
94		/* not defined */
95		#else
96		# define U_NL_LANGINFO_CODESET CODESET
97		#endif
98
99		#if defined(U_TZSET) \|\| defined(U_HAVE_TZSET)
100		/* Use the predefined value. */
101		#elif U_PLATFORM_USES_ONLY_WIN32_API
102		// UWP doesn't support tzset or environment variables for tz
103		#if U_PLATFORM_HAS_WINUWP_API == 0
104		# define U_TZSET _tzset
105		#endif
106		#elif U_PLATFORM == U_PF_OS400
107		/* not defined */
108		#elif U_PLATFORM == U_PF_HAIKU
109		/* not defined */
110		#else
111	7	# define U_TZSET tzset
112		#endif
113
114		#if defined(U_TIMEZONE) \|\| defined(U_HAVE_TIMEZONE)
115		/* Use the predefined value. */
116		#elif U_PLATFORM == U_PF_ANDROID
117		# define U_TIMEZONE timezone
118		#elif defined(__UCLIBC__)
119		// uClibc does not have __timezone or _timezone.
120		#elif defined(_NEWLIB_VERSION)
121		# define U_TIMEZONE _timezone
122		#elif defined(__GLIBC__)
123		// glibc
124	7	# define U_TIMEZONE __timezone
125		#elif U_PLATFORM_IS_LINUX_BASED
126		// not defined
127		#elif U_PLATFORM_USES_ONLY_WIN32_API
128		# define U_TIMEZONE _timezone
129		#elif U_PLATFORM == U_PF_BSD && !defined(__NetBSD__)
130		/* not defined */
131		#elif U_PLATFORM == U_PF_OS400
132		/* not defined */
133		#elif U_PLATFORM == U_PF_IPHONE
134		/* not defined */
135		#else
136		# define U_TIMEZONE timezone
137		#endif
138
139		#if defined(U_TZNAME) \|\| defined(U_HAVE_TZNAME)
140		/* Use the predefined value. */
141		#elif U_PLATFORM_USES_ONLY_WIN32_API
142		/* not usable on all windows platforms */
143		#if U_PLATFORM_HAS_WINUWP_API == 0
144		# define U_TZNAME _tzname
145		#endif
146		#elif U_PLATFORM == U_PF_OS400
147		/* not defined */
148		#elif U_PLATFORM == U_PF_HAIKU
149		/* not defined, (well it is but a loop back to icu) */
150		#else
151	0	# define U_TZNAME tzname
152		#endif
153
154		#ifdef U_HAVE_MMAP
155		/* Use the predefined value. */
156		#elif U_PLATFORM_USES_ONLY_WIN32_API
157		# define U_HAVE_MMAP 0
158		#else
159		# define U_HAVE_MMAP 1
160		#endif
161
162		#ifdef U_HAVE_POPEN
163		/* Use the predefined value. */
164		#elif U_PLATFORM_USES_ONLY_WIN32_API
165		# define U_HAVE_POPEN 0
166		#elif U_PLATFORM == U_PF_OS400
167		# define U_HAVE_POPEN 0
168		#else
169		# define U_HAVE_POPEN 1
170		#endif
171
172		/**
173		* \def U_HAVE_DIRENT_H
174		* Defines whether dirent.h is available.
175		* @internal
176		*/
177		#ifdef U_HAVE_DIRENT_H
178		/* Use the predefined value. */
179		#elif U_PLATFORM_USES_ONLY_WIN32_API
180		# define U_HAVE_DIRENT_H 0
181		#else
182		# define U_HAVE_DIRENT_H 1
183		#endif
184
185		/** @} */
186
187		/===========================================================================/
188		/** @{ Programs used by ICU code */
189		/===========================================================================/
190
191		/**
192		* \def U_MAKE_IS_NMAKE
193		* Defines whether the "make" program is Windows nmake.
194		*/
195		#ifdef U_MAKE_IS_NMAKE
196		/* Use the predefined value. */
197		#elif U_PLATFORM == U_PF_WINDOWS
198		# define U_MAKE_IS_NMAKE 1
199		#else
200		# define U_MAKE_IS_NMAKE 0
201		#endif
202
203		/** @} */
204
205		/==========================================================================/
206		/* Platform utilities */
207		/==========================================================================/
208
209		/**
210		* Platform utilities isolates the platform dependencies of the
211		* library. For each platform which this code is ported to, these
212		* functions may have to be re-implemented.
213		*/
214
215		/**
216		* Floating point utility to determine if a double is Not a Number (NaN).
217		* @internal
218		*/
219		U_CAPI UBool U_EXPORT2 uprv_isNaN(double d);
220		/**
221		* Floating point utility to determine if a double has an infinite value.
222		* @internal
223		*/
224		U_CAPI UBool U_EXPORT2 uprv_isInfinite(double d);
225		/**
226		* Floating point utility to determine if a double has a positive infinite value.
227		* @internal
228		*/
229		U_CAPI UBool U_EXPORT2 uprv_isPositiveInfinity(double d);
230		/**
231		* Floating point utility to determine if a double has a negative infinite value.
232		* @internal
233		*/
234		U_CAPI UBool U_EXPORT2 uprv_isNegativeInfinity(double d);
235		/**
236		* Floating point utility that returns a Not a Number (NaN) value.
237		* @internal
238		*/
239		U_CAPI double U_EXPORT2 uprv_getNaN(void);
240		/**
241		* Floating point utility that returns an infinite value.
242		* @internal
243		*/
244		U_CAPI double U_EXPORT2 uprv_getInfinity(void);
245
246		/**
247		* Floating point utility to truncate a double.
248		* @internal
249		*/
250		U_CAPI double U_EXPORT2 uprv_trunc(double d);
251		/**
252		* Floating point utility to calculate the floor of a double.
253		* @internal
254		*/
255		U_CAPI double U_EXPORT2 uprv_floor(double d);
256		/**
257		* Floating point utility to calculate the ceiling of a double.
258		* @internal
259		*/
260		U_CAPI double U_EXPORT2 uprv_ceil(double d);
261		/**
262		* Floating point utility to calculate the absolute value of a double.
263		* @internal
264		*/
265		U_CAPI double U_EXPORT2 uprv_fabs(double d);
266		/**
267		* Floating point utility to calculate the fractional and integer parts of a double.
268		* @internal
269		*/
270		U_CAPI double U_EXPORT2 uprv_modf(double d, double* pinteger);
271		/**
272		* Floating point utility to calculate the remainder of a double divided by another double.
273		* @internal
274		*/
275		U_CAPI double U_EXPORT2 uprv_fmod(double d, double y);
276		/**
277		* Floating point utility to calculate d to the power of exponent (d^exponent).
278		* @internal
279		*/
280		U_CAPI double U_EXPORT2 uprv_pow(double d, double exponent);
281		/**
282		* Floating point utility to calculate 10 to the power of exponent (10^exponent).
283		* @internal
284		*/
285		U_CAPI double U_EXPORT2 uprv_pow10(int32_t exponent);
286		/**
287		* Floating point utility to calculate the maximum value of two doubles.
288		* @internal
289		*/
290		U_CAPI double U_EXPORT2 uprv_fmax(double d, double y);
291		/**
292		* Floating point utility to calculate the minimum value of two doubles.
293		* @internal
294		*/
295		U_CAPI double U_EXPORT2 uprv_fmin(double d, double y);
296		/**
297		* Private utility to calculate the maximum value of two integers.
298		* @internal
299		*/
300		U_CAPI int32_t U_EXPORT2 uprv_max(int32_t d, int32_t y);
301		/**
302		* Private utility to calculate the minimum value of two integers.
303		* @internal
304		*/
305		U_CAPI int32_t U_EXPORT2 uprv_min(int32_t d, int32_t y);
306
307		#if U_IS_BIG_ENDIAN
308		# define uprv_isNegative(number) (((signed char )&(number))<0)
309		#else
310		# define uprv_isNegative(number) (((signed char )&(number)+sizeof(number)-1)<0)
311		#endif
312
313		/**
314		* Return the largest positive number that can be represented by an integer
315		* type of arbitrary bit length.
316		* @internal
317		*/
318		U_CAPI double U_EXPORT2 uprv_maxMantissa(void);
319
320		/**
321		* Floating point utility to calculate the logarithm of a double.
322		* @internal
323		*/
324		U_CAPI double U_EXPORT2 uprv_log(double d);
325
326		/**
327		* Does common notion of rounding e.g. uprv_floor(x + 0.5);
328		* @param x the double number
329		* @return the rounded double
330		* @internal
331		*/
332		U_CAPI double U_EXPORT2 uprv_round(double x);
333
334		/**
335		* Adds the signed integers a and b, storing the result in res.
336		* Checks for signed integer overflow.
337		* Similar to the GCC/Clang extension __builtin_add_overflow
338		*
339		* @param a The first operand.
340		* @param b The second operand.
341		* @param res a + b
342		* @return true if overflow occurred; false if no overflow occurred.
343		* @internal
344		*/
345		U_CAPI UBool U_EXPORT2 uprv_add32_overflow(int32_t a, int32_t b, int32_t* res);
346
347		/**
348		* Multiplies the signed integers a and b, storing the result in res.
349		* Checks for signed integer overflow.
350		* Similar to the GCC/Clang extension __builtin_mul_overflow
351		*
352		* @param a The first multiplicand.
353		* @param b The second multiplicand.
354		* @param res a * b
355		* @return true if overflow occurred; false if no overflow occurred.
356		* @internal
357		*/
358		U_CAPI UBool U_EXPORT2 uprv_mul32_overflow(int32_t a, int32_t b, int32_t* res);
359
360		#if 0
361		/**
362		* Returns the number of digits after the decimal point in a double number x.
363		*
364		* @param x the double number
365		* @return the number of digits after the decimal point in a double number x.
366		* @internal
367		*/
368		/U_CAPI int32_t U_EXPORT2 uprv_digitsAfterDecimal(double x);/
369		#endif
370
371		#if !U_CHARSET_IS_UTF8
372		/**
373		* Please use ucnv_getDefaultName() instead.
374		* Return the default codepage for this platform and locale.
375		* This function can call setlocale() on Unix platforms. Please read the
376		* platform documentation on setlocale() before calling this function.
377		* @return the default codepage for this platform
378		* @internal
379		*/
380		U_CAPI const char* U_EXPORT2 uprv_getDefaultCodepage(void);
381		#endif
382
383		/**
384		* Please use uloc_getDefault() instead.
385		* Return the default locale ID string by querying the system, or
386		* zero if one cannot be found.
387		* This function can call setlocale() on Unix platforms. Please read the
388		* platform documentation on setlocale() before calling this function.
389		* @return the default locale ID string
390		* @internal
391		*/
392		U_CAPI const char* U_EXPORT2 uprv_getDefaultLocaleID(void);
393
394		/**
395		* Time zone utilities
396		*
397		* Wrappers for C runtime library functions relating to timezones.
398		* The t_tzset() function (similar to tzset) uses the current setting
399		* of the environment variable TZ to assign values to three global
400		* variables: daylight, timezone, and tzname. These variables have the
401		* following meanings, and are declared in <time.h>.
402		*
403		* daylight Nonzero if daylight-saving-time zone (DST) is specified
404		* in TZ; otherwise, 0. Default value is 1.
405		* timezone Difference in seconds between coordinated universal
406		* time and local time. E.g., -28,800 for PST (GMT-8hrs)
407		* tzname(0) Three-letter time-zone name derived from TZ environment
408		* variable. E.g., "PST".
409		* tzname(1) Three-letter DST zone name derived from TZ environment
410		* variable. E.g., "PDT". If DST zone is omitted from TZ,
411		* tzname(1) is an empty string.
412		*
413		* Notes: For example, to set the TZ environment variable to correspond
414		* to the current time zone in Germany, you can use one of the
415		* following statements:
416		*
417		* set TZ=GST1GDT
418		* set TZ=GST+1GDT
419		*
420		* If the TZ value is not set, t_tzset() attempts to use the time zone
421		* information specified by the operating system. Under Windows NT
422		* and Windows 95, this information is specified in the Control Panel's
423		* Date/Time application.
424		* @internal
425		*/
426		U_CAPI void U_EXPORT2 uprv_tzset(void);
427
428		/**
429		* Difference in seconds between coordinated universal
430		* time and local time. E.g., -28,800 for PST (GMT-8hrs)
431		* @return the difference in seconds between coordinated universal time and local time.
432		* @internal
433		*/
434		U_CAPI int32_t U_EXPORT2 uprv_timezone(void);
435
436		/**
437		* tzname(0) Three-letter time-zone name derived from TZ environment
438		* variable. E.g., "PST".
439		* tzname(1) Three-letter DST zone name derived from TZ environment
440		* variable. E.g., "PDT". If DST zone is omitted from TZ,
441		* tzname(1) is an empty string.
442		* @internal
443		*/
444		U_CAPI const char* U_EXPORT2 uprv_tzname(int n);
445
446		/**
447		* Reset the global tzname cache.
448		* @internal
449		*/
450		U_CAPI void uprv_tzname_clear_cache(void);
451
452		/**
453		* Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970.
454		* This function is affected by 'faketime' and should be the bottleneck for all user-visible ICU time functions.
455		* @return the UTC time measured in milliseconds
456		* @internal
457		*/
458		U_CAPI UDate U_EXPORT2 uprv_getUTCtime(void);
459
460		/**
461		* Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970.
462		* This function is not affected by 'faketime', so it should only be used by low level test functions- not by anything that
463		* exposes time to the end user.
464		* @return the UTC time measured in milliseconds
465		* @internal
466		*/
467		U_CAPI UDate U_EXPORT2 uprv_getRawUTCtime(void);
468
469		/**
470		* Determine whether a pathname is absolute or not, as defined by the platform.
471		* @param path Pathname to test
472		* @return true if the path is absolute
473		* @internal (ICU 3.0)
474		*/
475		U_CAPI UBool U_EXPORT2 uprv_pathIsAbsolute(const char *path);
476
477		/**
478		* Use U_MAX_PTR instead of this function.
479		* @param void pointer to test
480		* @return the largest possible pointer greater than the base
481		* @internal (ICU 3.8)
482		*/
483		U_CAPI void * U_EXPORT2 uprv_maximumPtr(void *base);
484
485		/**
486		* Maximum value of a (void*) - use to indicate the limit of an 'infinite' buffer.
487		* In fact, buffer sizes must not exceed 2GB so that the difference between
488		* the buffer limit and the buffer start can be expressed in an int32_t.
489		*
490		* The definition of U_MAX_PTR must fulfill the following conditions:
491		* - return the largest possible pointer greater than base
492		* - return a valid pointer according to the machine architecture (AS/400, 64-bit, etc.)
493		* - avoid wrapping around at high addresses
494		* - make sure that the returned pointer is not farther from base than 0x7fffffff bytes
495		*
496		* @param base The beginning of a buffer to find the maximum offset from
497		* @internal
498		*/
499		#ifndef U_MAX_PTR
500		# if U_PLATFORM == U_PF_OS390 && !defined(_LP64)
501		/* We have 31-bit pointers. */
502		# define U_MAX_PTR(base) ((void *)0x7fffffff)
503		# elif U_PLATFORM == U_PF_OS400
504		# define U_MAX_PTR(base) uprv_maximumPtr((void *)base)
505		# elif 0
506		/*
507		* For platforms where pointers are scalar values (which is normal, but unlike i5/OS)
508		* but that do not define uintptr_t.
509		*
510		* However, this does not work on modern compilers:
511		* The C++ standard does not define pointer overflow, and allows compilers to
512		* assume that p+u>p for any pointer p and any integer u>0.
513		* Thus, modern compilers optimize away the ">" comparison.
514		* (See ICU tickets #7187 and #8096.)
515		*/
516		# define U_MAX_PTR(base) \
517		((void )(((char )(base)+0x7fffffffu) > (char *)(base) \
518		? ((char *)(base)+0x7fffffffu) \
519		: (char *)-1))
520		# else
521		/* Default version. C++ standard compliant for scalar pointers. */
522		# define U_MAX_PTR(base) \
523	24.1M	((void *)(((uintptr_t)(base)+0x7fffffffu) > (uintptr_t)(base) \
524	24.1M	? ((uintptr_t)(base)+0x7fffffffu) \
525	24.1M	: (uintptr_t)-1))
526		# endif
527		#endif
528
529
530		#ifdef __cplusplus
531		/**
532		* Pin a buffer capacity such that doing pointer arithmetic
533		* on the destination pointer and capacity cannot overflow.
534		*
535		* The pinned capacity must fulfill the following conditions (for positive capacities):
536		* - dest + capacity is a valid pointer according to the machine architecture (AS/400, 64-bit, etc.)
537		* - (dest + capacity) >= dest
538		* - The size (in bytes) of T[capacity] does not exceed 0x7fffffff
539		*
540		* @param dest the destination buffer pointer.
541		* @param capacity the requested buffer capacity, in units of type T.
542		* @return the pinned capacity.
543		* @internal
544		*/
545		template <typename T>
546	0	inline int32_t pinCapacity(T *dest, int32_t capacity) {
547	0	if (capacity <= 0) { return capacity; }
548
549	0	uintptr_t destInt = (uintptr_t)dest;
550	0	uintptr_t maxInt;
551
552		# if U_PLATFORM == U_PF_OS390 && !defined(_LP64)
553		// We have 31-bit pointers.
554		maxInt = 0x7fffffff;
555		# elif U_PLATFORM == U_PF_OS400
556		maxInt = (uintptr_t)uprv_maximumPtr((void *)dest);
557		# else
558	0	maxInt = destInt + 0x7fffffffu;
559	0	if (maxInt < destInt) {
560		// Less than 2GB to the end of the address space.
561		// Pin to that to prevent address overflow.
562	0	maxInt = static_cast<uintptr_t>(-1);
563	0	}
564	0	# endif
565
566	0	uintptr_t maxBytes = maxInt - destInt; // max. 2GB
567	0	int32_t maxCapacity = (int32_t)(maxBytes / sizeof(T));
568	0	return capacity <= maxCapacity ? capacity : maxCapacity;
569	0	} Unexecuted instantiation: int pinCapacity<char>(char, int) Unexecuted instantiation: int pinCapacity<char16_t>(char16_t, int)
570		#endif // __cplusplus
571
572		/* Dynamic Library Functions */
573
574		typedef void (UVoidFunction)(void);
575
576		#if U_ENABLE_DYLOAD
577		/**
578		* Load a library
579		* @internal (ICU 4.4)
580		*/
581		U_CAPI void * U_EXPORT2 uprv_dl_open(const char libName, UErrorCode status);
582
583		/**
584		* Close a library
585		* @internal (ICU 4.4)
586		*/
587		U_CAPI void U_EXPORT2 uprv_dl_close( void lib, UErrorCode status);
588
589		/**
590		* Extract a symbol from a library (function)
591		* @internal (ICU 4.8)
592		*/
593		U_CAPI UVoidFunction* U_EXPORT2 uprv_dlsym_func( void lib, const char symbolName, UErrorCode *status);
594
595		/**
596		* Extract a symbol from a library (function)
597		* Not implemented, no clients.
598		* @internal
599		*/
600		/* U_CAPI void * U_EXPORT2 uprv_dlsym_data( void lib, const char symbolName, UErrorCode status); /
601
602		#endif
603
604		/**
605		* Define malloc and related functions
606		* @internal
607		*/
608		#if U_PLATFORM == U_PF_OS400
609		# define uprv_default_malloc(x) _C_TS_malloc(x)
610		# define uprv_default_realloc(x,y) _C_TS_realloc(x,y)
611		# define uprv_default_free(x) _C_TS_free(x)
612		/* also _C_TS_calloc(x) */
613		#else
614		/* C defaults */
615	622M	# define uprv_default_malloc(x) malloc(x)
616	5.13M	# define uprv_default_realloc(x,y) realloc(x,y)
617	921M	# define uprv_default_free(x) free(x)
618		#endif
619
620
621		#endif