1f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/* 2f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)****************************************************************************** 3f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* 4f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* Copyright (C) 1997-2010, International Business Machines 5f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* Corporation and others. All Rights Reserved. 6f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* 7f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)****************************************************************************** 8f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* 9f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* FILE NAME : putilimp.h 10f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* 11f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* Date Name Description 12f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)* 10/17/04 grhoten Move internal functions from putil.h to this file. 13f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)****************************************************************************** 14f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)*/ 15f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 16f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#ifndef PUTILIMP_H 17f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#define PUTILIMP_H 18f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 19f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#include "unicode/utypes.h" 20f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#include "unicode/putil.h" 21f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 22f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/*==========================================================================*/ 23f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/* Platform utilities */ 24f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/*==========================================================================*/ 25f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 26f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 27f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Platform utilities isolates the platform dependencies of the 28f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * libarary. For each platform which this code is ported to, these 29f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * functions may have to be re-implemented. 30f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 31f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 32f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 33f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to determine if a double is Not a Number (NaN). 34f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 35f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 36f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL UBool U_EXPORT2 uprv_isNaN(double d); 37f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 38f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to determine if a double has an infinite value. 39f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 40f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 41f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL UBool U_EXPORT2 uprv_isInfinite(double d); 42f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 43f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to determine if a double has a positive infinite value. 44f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 45f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 46f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL UBool U_EXPORT2 uprv_isPositiveInfinity(double d); 47f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 48f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to determine if a double has a negative infinite value. 49f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 50f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 51f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL UBool U_EXPORT2 uprv_isNegativeInfinity(double d); 52f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 53f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility that returns a Not a Number (NaN) value. 54f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 55f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 56f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_getNaN(void); 57f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 58f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility that returns an infinite value. 59f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 60f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 61f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_getInfinity(void); 62f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 63f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 64f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to truncate a double. 65f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 66f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 67f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_trunc(double d); 68f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 69f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the floor of a double. 70f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 71f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 72f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_floor(double d); 73f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 74f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the ceiling of a double. 75f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 76f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 77f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_ceil(double d); 78f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 79f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the absolute value of a double. 80f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 81f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 82f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_fabs(double d); 83f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 84f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the fractional and integer parts of a double. 85f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 86f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 87f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_modf(double d, double* pinteger); 88f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 89f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the remainder of a double divided by another double. 90f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 91f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 92f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_fmod(double d, double y); 93f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 94f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate d to the power of exponent (d^exponent). 95f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 96f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 97f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_pow(double d, double exponent); 98f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 99f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate 10 to the power of exponent (10^exponent). 100f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 101f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 102f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_pow10(int32_t exponent); 103f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 104f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the maximum value of two doubles. 105f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 106f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 107f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_fmax(double d, double y); 108f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 109f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the minimum value of two doubles. 110f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 111f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 112f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_fmin(double d, double y); 113f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 114f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Private utility to calculate the maximum value of two integers. 115f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 116f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 117f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL int32_t U_EXPORT2 uprv_max(int32_t d, int32_t y); 118f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 119f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Private utility to calculate the minimum value of two integers. 120f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 121f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 122f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL int32_t U_EXPORT2 uprv_min(int32_t d, int32_t y); 123f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 124f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#if U_IS_BIG_ENDIAN 125f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# define uprv_isNegative(number) (*((signed char *)&(number))<0) 126f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#else 127f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# define uprv_isNegative(number) (*((signed char *)&(number)+sizeof(number)-1)<0) 128f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif 129f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 130f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 131f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Return the largest positive number that can be represented by an integer 132f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * type of arbitrary bit length. 133f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 134f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 135f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_maxMantissa(void); 136f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 137f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 138f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Floating point utility to calculate the logarithm of a double. 139f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 140f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 141f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_log(double d); 142f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 143f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 144f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Does common notion of rounding e.g. uprv_floor(x + 0.5); 145f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param x the double number 146f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return the rounded double 147f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 148f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 149f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL double U_EXPORT2 uprv_round(double x); 150f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 151f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#if 0 152f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 153f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Returns the number of digits after the decimal point in a double number x. 154f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 155f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param x the double number 156f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return the number of digits after the decimal point in a double number x. 157f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 158f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 159f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/*U_INTERNAL int32_t U_EXPORT2 uprv_digitsAfterDecimal(double x);*/ 160f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif 161f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 162f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 163f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Time zone utilities 164f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 165f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Wrappers for C runtime library functions relating to timezones. 166f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The t_tzset() function (similar to tzset) uses the current setting 167f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * of the environment variable TZ to assign values to three global 168f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * variables: daylight, timezone, and tzname. These variables have the 169f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * following meanings, and are declared in <time.h>. 170f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 171f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * daylight Nonzero if daylight-saving-time zone (DST) is specified 172f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * in TZ; otherwise, 0. Default value is 1. 173f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * timezone Difference in seconds between coordinated universal 174f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * time and local time. E.g., -28,800 for PST (GMT-8hrs) 175f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * tzname(0) Three-letter time-zone name derived from TZ environment 176f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * variable. E.g., "PST". 177f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * tzname(1) Three-letter DST zone name derived from TZ environment 178f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * variable. E.g., "PDT". If DST zone is omitted from TZ, 179f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * tzname(1) is an empty string. 180f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 181f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Notes: For example, to set the TZ environment variable to correspond 182f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * to the current time zone in Germany, you can use one of the 183f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * following statements: 184f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 185f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * set TZ=GST1GDT 186f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * set TZ=GST+1GDT 187f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 188f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * If the TZ value is not set, t_tzset() attempts to use the time zone 189f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * information specified by the operating system. Under Windows NT 190f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * and Windows 95, this information is specified in the Control Panel's 191f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Date/Time application. 192f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 193f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 194f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL void U_EXPORT2 uprv_tzset(void); 195f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 196f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 197f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Difference in seconds between coordinated universal 198f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * time and local time. E.g., -28,800 for PST (GMT-8hrs) 199f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return the difference in seconds between coordinated universal time and local time. 200f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 201f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 202f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL int32_t U_EXPORT2 uprv_timezone(void); 203f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 204f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 205f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * tzname(0) Three-letter time-zone name derived from TZ environment 206f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * variable. E.g., "PST". 207f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * tzname(1) Three-letter DST zone name derived from TZ environment 208f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * variable. E.g., "PDT". If DST zone is omitted from TZ, 209f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * tzname(1) is an empty string. 210f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 211f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 212f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL const char* U_EXPORT2 uprv_tzname(int n); 213f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 214f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 215f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970. 216f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * This function is affected by 'faketime' and should be the bottleneck for all user-visible ICU time functions. 217f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return the UTC time measured in milliseconds 218f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 219f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 220f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL UDate U_EXPORT2 uprv_getUTCtime(void); 221f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 222f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 223f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Get UTC (GMT) time measured in milliseconds since 0:00 on 1/1/1970. 224f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * This function is not affected by 'faketime', so it should only be used by low level test functions- not by anything that 225f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * exposes time to the end user. 226f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return the UTC time measured in milliseconds 227f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 228f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 229f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL UDate U_EXPORT2 uprv_getRawUTCtime(void); 230f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 231f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 232f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Determine whether a pathname is absolute or not, as defined by the platform. 233f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param path Pathname to test 234f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return TRUE if the path is absolute 235f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal (ICU 3.0) 236f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 237f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL UBool U_EXPORT2 uprv_pathIsAbsolute(const char *path); 238f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 239f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 240f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Use U_MAX_PTR instead of this function. 241f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param void pointer to test 242f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @return the largest possible pointer greater than the base 243f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal (ICU 3.8) 244f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 245f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL void * U_EXPORT2 uprv_maximumPtr(void *base); 246f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 247f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 248f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Maximum value of a (void*) - use to indicate the limit of an 'infinite' buffer. 249f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * In fact, buffer sizes must not exceed 2GB so that the difference between 250f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * the buffer limit and the buffer start can be expressed in an int32_t. 251f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 252f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * The definition of U_MAX_PTR must fulfill the following conditions: 253f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * - return the largest possible pointer greater than base 254f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * - return a valid pointer according to the machine architecture (AS/400, 64-bit, etc.) 255f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * - avoid wrapping around at high addresses 256f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * - make sure that the returned pointer is not farther from base than 0x7fffffff 257f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * 258f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @param base The beginning of a buffer to find the maximum offset from 259f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal 260f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 261f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#ifndef U_MAX_PTR 262f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# if defined(OS390) && !defined(_LP64) 263f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) /* We have 31-bit pointers. */ 264f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# define U_MAX_PTR(base) ((void *)0x7fffffff) 265f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# elif defined(OS400) 266f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# define U_MAX_PTR(base) uprv_maximumPtr((void *)base) 267f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# elif defined(__GNUC__) && __GNUC__ >= 4 268f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/* 269f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Due to a compiler optimization bug, gcc 4 causes test failures when doing 270f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * this math arithmetic on pointers on some platforms. It seems like the 271f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * pointers are considered signed instead of unsigned. The uintptr_t type 272f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * isn't available on all platforms (i.e MSVC 6) and pointers aren't always 273f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * a scalar value (i.e. i5/OS see uprv_maximumPtr function). 274f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 275f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# define U_MAX_PTR(base) \ 276f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) ((void *)(((uintptr_t)(base)+0x7fffffffu) > (uintptr_t)(base) \ 277f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) ? ((uintptr_t)(base)+0x7fffffffu) \ 278f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) : (uintptr_t)-1)) 279f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# else 280f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# define U_MAX_PTR(base) \ 281f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) ((char *)(((char *)(base)+0x7fffffffu) > (char *)(base) \ 282f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) ? ((char *)(base)+0x7fffffffu) \ 283f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) : (char *)-1)) 284f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)# endif 285f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif 286f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 287f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#if U_ENABLE_DYLOAD 288f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/* Dynamic Library Functions */ 289f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 290f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 291f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Load a library 292f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal (ICU 4.4) 293f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 294f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL void * U_EXPORT2 uprv_dl_open(const char *libName, UErrorCode *status); 295f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 296f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 297f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Close a library 298f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal (ICU 4.4) 299f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 300f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL void U_EXPORT2 uprv_dl_close( void *lib, UErrorCode *status); 301f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 302f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)/** 303f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * Extract a symbol from a library 304f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) * @internal (ICU 4.4) 305f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) */ 306f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)U_INTERNAL void * U_EXPORT2 uprv_dl_sym( void *lib, const char *symbolName, UErrorCode *status); 307f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 308f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif 309f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles) 310f4ed1cf5d184064c4cf0e4359c6d5d8aadb50afaTorne (Richard Coles)#endif 311