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- /*
- *******************************************************************************
- * *
- * COPYRIGHT: *
- * (C) Copyright Taligent, Inc., 1997 *
- * (C) Copyright International Business Machines Corporation, 1997-1999 *
- * Licensed Material - Program-Property of IBM - All Rights Reserved. *
- * US Government Users Restricted Rights - Use, duplication, or disclosure *
- * restricted by GSA ADP Schedule Contract with IBM Corp. *
- * *
- *******************************************************************************
- *
- * FILE NAME : putil.h
- *
- * Date Name Description
- * 05/14/98 nos Creation (content moved here from utypes.h).
- * 06/17/99 erm Added IEEE_754
- * 07/22/98 stephen Added IEEEremainder, max, min, trunc
- * 08/13/98 stephen Added isNegativeInfinity, isPositiveInfinity
- * 08/24/98 stephen Added longBitsFromDouble
- * 03/02/99 stephen Removed openFile(). Added AS400 support.
- * 04/15/99 stephen Converted to C
- *******************************************************************************
- */
-
- #ifndef PUTIL_H
- #define PUTIL_H
-
- #include "utypes.h"
-
- /* Define this if your platform supports IEEE 754 floating point */
- #define IEEE_754
-
- /*===========================================================================*/
- /* 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 utilities */
- U_CAPI bool_t U_EXPORT2 icu_isNaN(double);
- U_CAPI bool_t U_EXPORT2 icu_isInfinite(double);
- U_CAPI bool_t U_EXPORT2 icu_isPositiveInfinity(double);
- U_CAPI bool_t U_EXPORT2 icu_isNegativeInfinity(double);
- U_CAPI double U_EXPORT2 icu_getNaN(void);
- U_CAPI double U_EXPORT2 icu_getInfinity(void);
-
- U_CAPI double U_EXPORT2 icu_floor(double x);
- U_CAPI double U_EXPORT2 icu_ceil(double x);
- U_CAPI double U_EXPORT2 icu_fabs(double x);
- U_CAPI double U_EXPORT2 icu_modf(double x, double* y);
- U_CAPI double U_EXPORT2 icu_fmod(double x, double y);
- U_CAPI double U_EXPORT2 icu_pow10(int32_t x);
- U_CAPI double U_EXPORT2 icu_IEEEremainder(double x, double y);
- U_CAPI double U_EXPORT2 icu_fmax(double x, double y);
- U_CAPI double U_EXPORT2 icu_fmin(double x, double y);
- U_CAPI int32_t U_EXPORT2 icu_max(int32_t x, int32_t y);
- U_CAPI int32_t U_EXPORT2 icu_min(int32_t x, int32_t y);
- U_CAPI double U_EXPORT2 icu_trunc(double d);
- U_CAPI void U_EXPORT2 icu_longBitsFromDouble(double d, int32_t *hi, uint32_t *lo);
-
- /*
- * Return the floor of the log base 10 of a given double.
- * This method compensates for inaccuracies which arise naturally when
- * computing logs, and always gives the correct value. The parameter
- * must be positive and finite.
- * (Thanks to Alan Liu for supplying this function.)
- */
- /**
- * Returns the common log of the double value d.
- * @param d the double value to apply the common log function for.
- * @return the log of value d.
- */
- U_CAPI int16_t U_EXPORT2 icu_log10(double d);
-
- /**
- * Returns the number of digits after the decimal point in a double number x.
- * @param x the double number
- */
- U_CAPI int32_t U_EXPORT2 icu_digitsAfterDecimal(double x);
-
- /**
- * 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 Panels
- * Date/Time application.
- */
- U_CAPI void U_EXPORT2 icu_tzset(void);
- U_CAPI int32_t U_EXPORT2 icu_timezone(void);
- U_CAPI char* U_EXPORT2 icu_tzname(int index);
-
- /* Get UTC (GMT) time measured in seconds since 0:00 on 1/1/70. */
- U_CAPI int32_t U_EXPORT2 icu_getUTCtime(void);
-
- /* Return the default data directory for this platform. See Locale. */
- U_CAPI const char* U_EXPORT2 icu_getDefaultDataDirectory(void);
-
- /* Return the default codepage for this platform and locale */
- U_CAPI const char* U_EXPORT2 icu_getDefaultCodepage(void);
-
- /* Return the default locale ID string by querying ths system, or
- zero if one cannot be found. */
- U_CAPI const char* U_EXPORT2 icu_getDefaultLocaleID(void);
-
- /*
- * Finds the least double greater than d (if positive == true),
- * or the greatest double less than d (if positive == false).
- *
- * This is a special purpose function defined by the ChoiceFormat API
- * documentation.
- * It is not a general purpose function and not defined for NaN or Infinity
- */
- U_CAPI double U_EXPORT2 icu_nextDouble(double d, bool_t positive);
-
- #endif
-
-
-
-
-