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Diffstat (limited to 'Build/source/libs/icu/icu-4.6/common/putilimp.h')
-rw-r--r-- | Build/source/libs/icu/icu-4.6/common/putilimp.h | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-4.6/common/putilimp.h b/Build/source/libs/icu/icu-4.6/common/putilimp.h new file mode 100644 index 00000000000..93de6a0128b --- /dev/null +++ b/Build/source/libs/icu/icu-4.6/common/putilimp.h @@ -0,0 +1,310 @@ +/* +****************************************************************************** +* +* Copyright (C) 1997-2010, 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" + +/*==========================================================================*/ +/* Platform utilities */ +/*==========================================================================*/ + +/** + * Platform utilities isolates the platform dependencies of the + * libarary. 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_INTERNAL UBool U_EXPORT2 uprv_isNaN(double d); +/** + * Floating point utility to determine if a double has an infinite value. + * @internal + */ +U_INTERNAL UBool U_EXPORT2 uprv_isInfinite(double d); +/** + * Floating point utility to determine if a double has a positive infinite value. + * @internal + */ +U_INTERNAL UBool U_EXPORT2 uprv_isPositiveInfinity(double d); +/** + * Floating point utility to determine if a double has a negative infinite value. + * @internal + */ +U_INTERNAL UBool U_EXPORT2 uprv_isNegativeInfinity(double d); +/** + * Floating point utility that returns a Not a Number (NaN) value. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_getNaN(void); +/** + * Floating point utility that returns an infinite value. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_getInfinity(void); + +/** + * Floating point utility to truncate a double. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_trunc(double d); +/** + * Floating point utility to calculate the floor of a double. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_floor(double d); +/** + * Floating point utility to calculate the ceiling of a double. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_ceil(double d); +/** + * Floating point utility to calculate the absolute value of a double. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_fabs(double d); +/** + * Floating point utility to calculate the fractional and integer parts of a double. + * @internal + */ +U_INTERNAL 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_INTERNAL double U_EXPORT2 uprv_fmod(double d, double y); +/** + * Floating point utility to calculate d to the power of exponent (d^exponent). + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_pow(double d, double exponent); +/** + * Floating point utility to calculate 10 to the power of exponent (10^exponent). + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_pow10(int32_t exponent); +/** + * Floating point utility to calculate the maximum value of two doubles. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_fmax(double d, double y); +/** + * Floating point utility to calculate the minimum value of two doubles. + * @internal + */ +U_INTERNAL double U_EXPORT2 uprv_fmin(double d, double y); +/** + * Private utility to calculate the maximum value of two integers. + * @internal + */ +U_INTERNAL int32_t U_EXPORT2 uprv_max(int32_t d, int32_t y); +/** + * Private utility to calculate the minimum value of two integers. + * @internal + */ +U_INTERNAL 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_INTERNAL double U_EXPORT2 uprv_maxMantissa(void); + +/** + * Floating point utility to calculate the logarithm of a double. + * @internal + */ +U_INTERNAL 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_INTERNAL double U_EXPORT2 uprv_round(double x); + +#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_INTERNAL int32_t U_EXPORT2 uprv_digitsAfterDecimal(double x);*/ +#endif + +/** + * 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 <time.h>. + * + * 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_INTERNAL 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_INTERNAL 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_INTERNAL const char* U_EXPORT2 uprv_tzname(int n); + +/** + * 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_INTERNAL 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_INTERNAL 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_INTERNAL 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_INTERNAL 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 + * + * @param base The beginning of a buffer to find the maximum offset from + * @internal + */ +#ifndef U_MAX_PTR +# if defined(OS390) && !defined(_LP64) + /* We have 31-bit pointers. */ +# define U_MAX_PTR(base) ((void *)0x7fffffff) +# elif defined(OS400) +# define U_MAX_PTR(base) uprv_maximumPtr((void *)base) +# elif defined(__GNUC__) && __GNUC__ >= 4 +/* + * Due to a compiler optimization bug, gcc 4 causes test failures when doing + * this math arithmetic on pointers on some platforms. It seems like the + * pointers are considered signed instead of unsigned. The uintptr_t type + * isn't available on all platforms (i.e MSVC 6) and pointers aren't always + * a scalar value (i.e. i5/OS see uprv_maximumPtr function). + */ +# define U_MAX_PTR(base) \ + ((void *)(((uintptr_t)(base)+0x7fffffffu) > (uintptr_t)(base) \ + ? ((uintptr_t)(base)+0x7fffffffu) \ + : (uintptr_t)-1)) +# else +# define U_MAX_PTR(base) \ + ((char *)(((char *)(base)+0x7fffffffu) > (char *)(base) \ + ? ((char *)(base)+0x7fffffffu) \ + : (char *)-1)) +# endif +#endif + +#if U_ENABLE_DYLOAD +/* Dynamic Library Functions */ + +/** + * Load a library + * @internal (ICU 4.4) + */ +U_INTERNAL void * U_EXPORT2 uprv_dl_open(const char *libName, UErrorCode *status); + +/** + * Close a library + * @internal (ICU 4.4) + */ +U_INTERNAL void U_EXPORT2 uprv_dl_close( void *lib, UErrorCode *status); + +/** + * Extract a symbol from a library + * @internal (ICU 4.4) + */ +U_INTERNAL void * U_EXPORT2 uprv_dl_sym( void *lib, const char *symbolName, UErrorCode *status); + +#endif + +#endif |