331 lines
12 KiB
C
331 lines
12 KiB
C
/*
|
||
******************************************************************************
|
||
*
|
||
* Copyright (C) 1997-2001, International Business Machines
|
||
* Corporation and others. All Rights Reserved.
|
||
*
|
||
******************************************************************************
|
||
*
|
||
* 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
|
||
* 11/15/99 helena Integrated S/390 changes for IEEE support.
|
||
* 01/11/00 helena Added u_getVersion.
|
||
******************************************************************************
|
||
*/
|
||
|
||
#ifndef PUTIL_H
|
||
#define PUTIL_H
|
||
|
||
#include "unicode/utypes.h"
|
||
|
||
/* 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
|
||
|
||
/*==========================================================================*/
|
||
/* 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
|
||
* @draft
|
||
*/
|
||
U_CAPI UBool U_EXPORT2 uprv_isNaN(double);
|
||
U_CAPI UBool U_EXPORT2 uprv_isInfinite(double);
|
||
U_CAPI UBool U_EXPORT2 uprv_isPositiveInfinity(double);
|
||
U_CAPI UBool U_EXPORT2 uprv_isNegativeInfinity(double);
|
||
U_CAPI double U_EXPORT2 uprv_getNaN(void);
|
||
U_CAPI double U_EXPORT2 uprv_getInfinity(void);
|
||
|
||
U_CAPI double U_EXPORT2 uprv_floor(double x);
|
||
U_CAPI double U_EXPORT2 uprv_ceil(double x);
|
||
U_CAPI double U_EXPORT2 uprv_fabs(double x);
|
||
U_CAPI double U_EXPORT2 uprv_modf(double x, double* y);
|
||
U_CAPI double U_EXPORT2 uprv_fmod(double x, double y);
|
||
U_CAPI double U_EXPORT2 uprv_pow10(int32_t x);
|
||
U_CAPI double U_EXPORT2 uprv_IEEEremainder(double x, double y);
|
||
U_CAPI double U_EXPORT2 uprv_fmax(double x, double y);
|
||
U_CAPI double U_EXPORT2 uprv_fmin(double x, double y);
|
||
U_CAPI int32_t U_EXPORT2 uprv_max(int32_t x, int32_t y);
|
||
U_CAPI int32_t U_EXPORT2 uprv_min(int32_t x, int32_t y);
|
||
U_CAPI double U_EXPORT2 uprv_trunc(double d);
|
||
U_CAPI void U_EXPORT2 uprv_longBitsFromDouble(double d, int32_t *hi, uint32_t *lo);
|
||
#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
|
||
|
||
/* Conversion from a digit to the character with radix base from 2-19 */
|
||
#define T_CString_itosOffset(a) ((a)<=9?('0'+(a)):('A'+(a)-10))
|
||
|
||
/*
|
||
* 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.
|
||
* @draft
|
||
*/
|
||
U_CAPI int16_t U_EXPORT2 uprv_log10(double d);
|
||
|
||
/**
|
||
* Returns the number of digits after the decimal point in a double number x.
|
||
*
|
||
* @param x the double number
|
||
* @draft
|
||
*/
|
||
U_CAPI int32_t U_EXPORT2 uprv_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 Panel<65>s
|
||
* Date/Time application.
|
||
* @draft
|
||
*/
|
||
U_CAPI void U_EXPORT2 uprv_tzset(void);
|
||
U_CAPI int32_t U_EXPORT2 uprv_timezone(void);
|
||
U_CAPI char* U_EXPORT2 uprv_tzname(int n);
|
||
|
||
/**
|
||
* Get UTC (GMT) time measured in seconds since 0:00 on 1/1/70.
|
||
* @draft
|
||
*/
|
||
U_CAPI int32_t U_EXPORT2 uprv_getUTCtime(void);
|
||
|
||
/**
|
||
* Return the data directory for this platform.
|
||
* @draft
|
||
*/
|
||
U_CAPI const char* U_EXPORT2 u_getDataDirectory(void);
|
||
|
||
/**
|
||
* Set the data directory.
|
||
* @draft
|
||
*/
|
||
U_CAPI void U_EXPORT2 u_setDataDirectory(const char *directory);
|
||
|
||
|
||
#ifdef OS390
|
||
/**
|
||
* Are we in OS/390 batch mode?
|
||
* @draft
|
||
*/
|
||
U_CAPI UBool uprv_isOS390BatchMode(void);
|
||
#endif
|
||
|
||
/**
|
||
* Return the default codepage for this platform and locale
|
||
* @draft
|
||
*/
|
||
U_CAPI const char* U_EXPORT2 uprv_getDefaultCodepage(void);
|
||
|
||
/**
|
||
* Return the default locale ID string by querying ths system, or
|
||
* zero if one cannot be found.
|
||
* @draft
|
||
*/
|
||
U_CAPI const char* U_EXPORT2 uprv_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
|
||
* @draft
|
||
*/
|
||
U_CAPI double U_EXPORT2 uprv_nextDouble(double d, UBool positive);
|
||
|
||
/**
|
||
* Filesystem file and path separator characters.
|
||
* Example: '/' and ':' on Unix, '\\' and ';' on Windows.
|
||
* @draft
|
||
*/
|
||
#ifdef XP_MAC
|
||
# define U_FILE_SEP_CHAR ':'
|
||
# define U_PATH_SEP_CHAR ';'
|
||
# define U_FILE_SEP_STRING ":"
|
||
# define U_PATH_SEP_STRING ";"
|
||
#elif defined(WIN32) || defined(OS2)
|
||
# define U_FILE_SEP_CHAR '\\'
|
||
# define U_PATH_SEP_CHAR ';'
|
||
# define U_FILE_SEP_STRING "\\"
|
||
# define U_PATH_SEP_STRING ";"
|
||
#else
|
||
# define U_FILE_SEP_CHAR '/'
|
||
# define U_PATH_SEP_CHAR ':'
|
||
# define U_FILE_SEP_STRING "/"
|
||
# define U_PATH_SEP_STRING ":"
|
||
#endif
|
||
|
||
/**
|
||
* Convert char characters to UChar characters.
|
||
* This utility function is useful only for "invariant characters"
|
||
* that are encoded in the platform default encoding.
|
||
* They are a small, constant subset of the encoding and include
|
||
* just the latin letters, digits, and some punctuation.
|
||
* For details, see utypes.h .
|
||
*
|
||
* @param cs Input string, points to <code>length</code>
|
||
* character bytes from a subset of the platform encoding.
|
||
* @param us Output string, points to memory for <code>length</code>
|
||
* Unicode characters.
|
||
* @param length The number of characters to convert; this may
|
||
* include the terminating <code>NUL</code>.
|
||
* @stable
|
||
*/
|
||
U_CAPI void U_EXPORT2
|
||
u_charsToUChars(const char *cs, UChar *us, UTextOffset length);
|
||
|
||
/**
|
||
* Convert UChar characters to char characters.
|
||
* This utility function is useful only for "invariant characters"
|
||
* that can be encoded in the platform default encoding.
|
||
* They are a small, constant subset of the encoding and include
|
||
* just the latin letters, digits, and some punctuation.
|
||
* For details, see utypes.h .
|
||
*
|
||
* @param us Input string, points to <code>length</code>
|
||
* Unicode characters that can be encoded with the
|
||
* codepage-invariant subset of the platform encoding.
|
||
* @param cs Output string, points to memory for <code>length</code>
|
||
* character bytes.
|
||
* @param length The number of characters to convert; this may
|
||
* include the terminating <code>NUL</code>.
|
||
* @stable
|
||
*/
|
||
U_CAPI void U_EXPORT2
|
||
u_UCharsToChars(const UChar *us, char *cs, UTextOffset length);
|
||
|
||
/**
|
||
* Parse a string with dotted-decimal version information and
|
||
* fill in a UVersionInfo structure with the result.
|
||
*
|
||
* @param versionArray The destination structure for the version information.
|
||
* @param versionString A string with dotted-decimal version information,
|
||
* with up to four non-negative number fields with
|
||
* values of up to 255 each.
|
||
*/
|
||
U_CAPI void U_EXPORT2
|
||
u_versionFromString(UVersionInfo versionArray, const char *versionString);
|
||
|
||
/**
|
||
* Write a string with dotted-decimal version information according
|
||
* to the input UVersionInfo.
|
||
*
|
||
* @param versionArray The version information to be written as a string.
|
||
* @param versionString A string buffer that will be filled in with
|
||
* a string corresponding to the numeric version
|
||
* information in versionArray.
|
||
* The buffer size must be at least U_MAX_VERSION_STRING_LENGTH.
|
||
*/
|
||
U_CAPI void U_EXPORT2
|
||
u_versionToString(UVersionInfo versionArray, char *versionString);
|
||
|
||
/**
|
||
* Gets the ICU release version. The version array stores the version information
|
||
* for ICU. For example, release "1.3.31.2" is then represented as 0x01031F02.
|
||
* @param versionArray the version # information, the result will be filled in
|
||
* @stable
|
||
*/
|
||
|
||
U_CAPI void U_EXPORT2
|
||
u_getVersion(UVersionInfo versionArray);
|
||
|
||
/* Define U_UPPER_ORDINAL */
|
||
#if U_CHARSET_FAMILY==U_ASCII_FAMILY
|
||
# define U_UPPER_ORDINAL(x) ((x)-'A')
|
||
#elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY
|
||
# define U_UPPER_ORDINAL(x) (((x) < 'J') ? ((x)-'A') : \
|
||
(((x) < 'S') ? ((x)-'J'+9) : \
|
||
((x)-'S'+18)))
|
||
#else
|
||
# error Unknown charset family!
|
||
#endif
|
||
|
||
/**
|
||
* 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
|
||
# ifdef OS390
|
||
# define U_MAX_PTR(base) ((void *)0x7fffffff)
|
||
# elif defined(OS400)
|
||
/*
|
||
* With the provided macro we should never be out of range of a given segment
|
||
* (a traditional/typical segment that is). Our segments have 5 bytes for the id
|
||
* and 3 bytes for the offset. The key is that the casting takes care of only
|
||
* retrieving the offset portion minus x1000. Hence, the smallest offset seen in
|
||
* a program is x001000 and when casted to an int would be 0. That's why we can
|
||
* only add 0xffefff. Otherwise, we would exceed the segment.
|
||
*
|
||
* Currently, 16MB is the current addressing limitation on as/400. This macro
|
||
* may eventually be changed to use 2GB addressability for the newer version of
|
||
* as/400 machines.
|
||
*/
|
||
# define U_MAX_PTR(base) ((void *)(((char *)base)-((int32_t)(base))+((int32_t)0xffefff)))
|
||
# else
|
||
# define U_MAX_PTR(base) ((void *)(((char *)(base)+0x7fffffff) > (char *)(base) ? ((char *)(base)+0x7fffffff) : (char *)-1))
|
||
# endif
|
||
#endif
|
||
|
||
#endif
|