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putil.h

00001 /*
00002 ******************************************************************************
00003 *
00004 *   Copyright (C) 1997-2001, International Business Machines
00005 *   Corporation and others.  All Rights Reserved.
00006 *
00007 ******************************************************************************
00008 *
00009 *  FILE NAME : putil.h
00010 *
00011 *   Date        Name        Description
00012 *   05/14/98    nos         Creation (content moved here from utypes.h).
00013 *   06/17/99    erm         Added IEEE_754
00014 *   07/22/98    stephen     Added IEEEremainder, max, min, trunc
00015 *   08/13/98    stephen     Added isNegativeInfinity, isPositiveInfinity
00016 *   08/24/98    stephen     Added longBitsFromDouble
00017 *   03/02/99    stephen     Removed openFile().  Added AS400 support.
00018 *   04/15/99    stephen     Converted to C
00019 *   11/15/99    helena      Integrated S/390 changes for IEEE support.
00020 *   01/11/00    helena      Added u_getVersion.
00021 ******************************************************************************
00022 */
00023 
00024 #ifndef PUTIL_H
00025 #define PUTIL_H
00026 
00027 #include "unicode/utypes.h"
00028 
00029 /* Define this to 1 if your platform supports IEEE 754 floating point,
00030    to 0 if it does not. */
00031 #ifndef IEEE_754
00032 #   define IEEE_754 1
00033 #endif
00034 
00035 /*==========================================================================*/
00036 /* Platform utilities                                                       */
00037 /*==========================================================================*/
00038 
00045 /* Floating point utilities 
00046  */
00047 U_CAPI UBool   U_EXPORT2 uprv_isNaN(double);
00048 U_CAPI UBool   U_EXPORT2 uprv_isInfinite(double);
00049 U_CAPI UBool   U_EXPORT2 uprv_isPositiveInfinity(double);
00050 U_CAPI UBool   U_EXPORT2 uprv_isNegativeInfinity(double);
00051 U_CAPI double  U_EXPORT2 uprv_getNaN(void);
00052 U_CAPI double  U_EXPORT2 uprv_getInfinity(void);
00053 
00054 U_CAPI double  U_EXPORT2 uprv_trunc(double d);
00055 U_CAPI double  U_EXPORT2 uprv_floor(double x);
00056 U_CAPI double  U_EXPORT2 uprv_ceil(double x);
00057 U_CAPI double  U_EXPORT2 uprv_fabs(double x);
00058 U_CAPI double  U_EXPORT2 uprv_modf(double x, double* y);
00059 U_CAPI double  U_EXPORT2 uprv_fmod(double x, double y);
00060 U_CAPI double  U_EXPORT2 uprv_pow(double x, double y);
00061 U_CAPI double  U_EXPORT2 uprv_pow10(int32_t x);
00062 U_CAPI double  U_EXPORT2 uprv_fmax(double x, double y);
00063 U_CAPI double  U_EXPORT2 uprv_fmin(double x, double y);
00064 U_CAPI int32_t U_EXPORT2 uprv_max(int32_t x, int32_t y);
00065 U_CAPI int32_t U_EXPORT2 uprv_min(int32_t x, int32_t y);
00066 
00067 #if U_IS_BIG_ENDIAN
00068 #   define uprv_isNegative(number) (*((signed char *)&(number))<0)
00069 #else
00070 #   define uprv_isNegative(number) (*((signed char *)&(number)+sizeof(number)-1)<0)
00071 #endif
00072 
00077 U_CAPI double  U_EXPORT2 uprv_maxMantissa(void);
00078 
00089 U_CAPI int16_t  U_EXPORT2 uprv_log10(double d);
00090 
00091 U_CAPI double  U_EXPORT2 uprv_log(double d);
00092 
00094 U_CAPI double  U_EXPORT2 uprv_round(double x);
00095 
00101 U_CAPI int32_t  U_EXPORT2 uprv_digitsAfterDecimal(double x);
00102 
00135 U_CAPI void     U_EXPORT2 uprv_tzset(void);
00136 
00141 U_CAPI int32_t  U_EXPORT2 uprv_timezone(void);
00142 
00150 U_CAPI char*    U_EXPORT2 uprv_tzname(int n);
00151 
00156 U_CAPI int32_t  U_EXPORT2 uprv_getUTCtime(void);
00157 
00179 U_CAPI const char* U_EXPORT2 u_getDataDirectory(void);
00180 
00194 U_CAPI void U_EXPORT2 u_setDataDirectory(const char *directory);
00195 
00200 U_CAPI const char*  U_EXPORT2 uprv_getDefaultCodepage(void);
00201 
00207 U_CAPI const char*  U_EXPORT2 uprv_getDefaultLocaleID(void);
00208 
00209 /*
00210  * Finds the least double greater than d (if positive == true),
00211  * or the greatest double less than d (if positive == false).
00212  *
00213  * This is a special purpose function defined by the ChoiceFormat API
00214  * documentation.
00215  * It is not a general purpose function and not defined for NaN or Infinity
00216  * @deprecated This will be removed after 2002-Jun-30. Use the ChoiceFormat closures API instead.
00217  */
00218 U_CAPI double       U_EXPORT2 uprv_nextDouble(double d, UBool positive);
00219 
00225 #ifdef XP_MAC
00226 #   define U_FILE_SEP_CHAR ':'
00227 #   define U_PATH_SEP_CHAR ';'
00228 #   define U_FILE_SEP_STRING ":"
00229 #   define U_PATH_SEP_STRING ";"
00230 #elif defined(WIN32) || defined(OS2)
00231 #   define U_FILE_SEP_CHAR '\\'
00232 #   define U_PATH_SEP_CHAR ';'
00233 #   define U_FILE_SEP_STRING "\\"
00234 #   define U_PATH_SEP_STRING ";"
00235 #else
00236 #   define U_FILE_SEP_CHAR '/'
00237 #   define U_PATH_SEP_CHAR ':'
00238 #   define U_FILE_SEP_STRING "/"
00239 #   define U_PATH_SEP_STRING ":"
00240 #endif
00241 
00258 U_CAPI void U_EXPORT2
00259 u_charsToUChars(const char *cs, UChar *us, UTextOffset length);
00260 
00278 U_CAPI void U_EXPORT2
00279 u_UCharsToChars(const UChar *us, char *cs, UTextOffset length);
00280 
00281 /* Define U_UPPER_ORDINAL */
00282 #if U_CHARSET_FAMILY==U_ASCII_FAMILY
00283 #   define U_UPPER_ORDINAL(x) ((x)-'A')
00284 #elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
00285 #   define U_UPPER_ORDINAL(x) (((x) < 'J') ? ((x)-'A') : \
00286                               (((x) < 'S') ? ((x)-'J'+9) : \
00287                                ((x)-'S'+18)))
00288 #else
00289 #   error Unknown charset family!
00290 #endif
00291 
00306 #ifndef U_MAX_PTR
00307 #  ifdef OS390
00308 #    define U_MAX_PTR(base) ((void *)0x7fffffff)
00309 #  elif defined(OS400)
00310 /*
00311  * With the provided macro we should never be out of range of a given segment
00312  * (a traditional/typical segment that is).  Our segments have 5 bytes for the id
00313  * and 3 bytes for the offset.  The key is that the casting takes care of only
00314  * retrieving the offset portion minus x1000.  Hence, the smallest offset seen in
00315  * a program is x001000 and when casted to an int would be 0.  That's why we can
00316  * only add 0xffefff.  Otherwise, we would exceed the segment.
00317  *
00318  * Currently, 16MB is the current addressing limitation on as/400.  This macro
00319  * may eventually be changed to use 2GB addressability for the newer version of
00320  * as/400 machines.
00321  */
00322 #    define U_MAX_PTR(base) ((void *)(((char *)base)-((int32_t)(base))+((int32_t)0xffefff)))
00323 #  else
00324 #    define U_MAX_PTR(base) ((void *)(((char *)(base)+0x7fffffff) > (char *)(base) ? ((char *)(base)+0x7fffffff) : (char *)-1))
00325 #  endif
00326 #endif
00327 
00328 #endif

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