#include "unicode/utypes.h"
Go to the source code of this file.
Defines | |
#define | IEEE_754 1 |
#define | uprv_isNegative(number) (*((signed char *)&(number)+sizeof(number)-1)<0) |
#define | U_FILE_SEP_CHAR '/' |
Filesystem file and path separator characters. More... | |
#define | U_FILE_ALT_SEP_CHAR '/' |
#define | U_PATH_SEP_CHAR ':' |
#define | U_FILE_SEP_STRING "/" |
#define | U_FILE_ALT_SEP_STRING "/" |
#define | U_PATH_SEP_STRING ":" |
#define | U_UPPER_ORDINAL(x) ((x)-'A') |
Get the ordinal number of an uppercase invariant character. More... | |
#define | U_MAX_PTR(base) ((void *)(((char *)(base)+0x7fffffffu) > (char *)(base) ? ((char *)(base)+0x7fffffffu) : (char *)-1)) |
Maximum value of a (void*) - use to indicate the limit of an 'infinite' buffer. More... | |
Functions | |
UBool | uprv_isNaN (double d) |
Floating point utility to determine if a double is Not a Number (NaN). More... | |
UBool | uprv_isInfinite (double d) |
Floating point utility to determine if a double has an infinite value. More... | |
UBool | uprv_isPositiveInfinity (double d) |
Floating point utility to determine if a double has a positive infinite value. More... | |
UBool | uprv_isNegativeInfinity (double d) |
Floating point utility to determine if a double has a negative infinite value. More... | |
double | uprv_getNaN (void) |
Floating point utility that returns a Not a Number (NaN) value. More... | |
double | uprv_getInfinity (void) |
Floating point utility that returns an infinite value. More... | |
double | uprv_trunc (double d) |
Floating point utility to truncate a double. More... | |
double | uprv_floor (double d) |
Floating point utility to calculate the floor of a double. More... | |
double | uprv_ceil (double d) |
Floating point utility to calculate the ceiling of a double. More... | |
double | uprv_fabs (double d) |
Floating point utility to calculate the absolute value of a double. More... | |
double | uprv_modf (double d, double *pinteger) |
Floating point utility to calculate the fractional and integer parts of a double. More... | |
double | uprv_fmod (double d, double y) |
Floating point utility to calculate the remainder of a double divided by another double. More... | |
double | uprv_pow (double d, double exponent) |
Floating point utility to calculate d to the power of exponent (d^exponent). More... | |
double | uprv_pow10 (int32_t exponent) |
Floating point utility to calculate 10 to the power of exponent (10^exponent). More... | |
double | uprv_fmax (double d, double y) |
Floating point utility to calculate the maximum value of two doubles. More... | |
double | uprv_fmin (double d, double y) |
Floating point utility to calculate the minimum value of two doubles. More... | |
int32_t | uprv_max (int32_t d, int32_t y) |
Private utility to calculate the maximum value of two integers. More... | |
int32_t | uprv_min (int32_t d, int32_t y) |
Private utility to calculate the minimum value of two integers. More... | |
double | uprv_maxMantissa (void) |
Return the largest positive number that can be represented by an integer type of arbitrary bit length. More... | |
int16_t | uprv_log10 (double d) |
Return the floor of the log base 10 of a given double. More... | |
double | uprv_log (double d) |
Floating point utility to calculate the logarithm of a double. More... | |
double | uprv_round (double x) |
Does common notion of rounding e.g. More... | |
int32_t | uprv_digitsAfterDecimal (double x) |
Returns the number of digits after the decimal point in a double number x. More... | |
void | uprv_tzset (void) |
Time zone utilities. More... | |
int32_t | uprv_timezone (void) |
Difference in seconds between coordinated universal time and local time. More... | |
char * | uprv_tzname (int n) |
tzname(0) Three-letter time-zone name derived from TZ environment variable. More... | |
int32_t | uprv_getUTCtime (void) |
Get UTC (GMT) time measured in seconds since 0:00 on 1/1/70. More... | |
const char * | u_getDataDirectory (void) |
Return the ICU data directory. More... | |
void | u_setDataDirectory (const char *directory) |
Set the ICU data directory. More... | |
const char * | uprv_getDefaultCodepage (void) |
Please use ucnv_getDefaultName() instead. More... | |
const char * | uprv_getDefaultLocaleID (void) |
Please use uloc_getDefault() instead. More... | |
void | u_charsToUChars (const char *cs, UChar *us, int32_t length) |
Convert char characters to UChar characters. More... | |
void | u_UCharsToChars (const UChar *us, char *cs, int32_t length) |
Convert UChar characters to char characters. More... | |
UBool | uprv_isInvariantString (const char *s, int32_t length) |
Check if a char string only contains invariant characters. More... | |
UBool | uprv_isInvariantUString (const UChar *s, int32_t length) |
Check if a Unicode string only contains invariant characters. More... |
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Filesystem file and path separator characters. Example: '/' and ':' on Unix, '\' and ';' on Windows.
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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:
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Get the ordinal number of an uppercase invariant character.
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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 .
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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 .
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Return the ICU data directory. The data directory is where common format ICU data files (.dat files) are loaded from. Note that normal use of the built-in ICU facilities does not require loading of an external data file; unless you are adding custom data to ICU, the data directory does not need to be set. The data directory is determined as follows: If u_setDataDirectory() has been called, that is it, otherwise if the ICU_DATA environment variable is set, use that, otherwise If a data directory was specifed at ICU build time (define ICU_DATA_DIR "path"), use that, otherwise no data directory is available.
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Set the ICU data directory. The data directory is where common format ICU data files (.dat files) are loaded from. Note that normal use of the built-in ICU facilities does not require loading of an external data file; unless you are adding custom data to ICU, the data directory does not need to be set. This function should be called at most once in a process, before the first ICU operation (e.g., u_init()) that will require the loading of an ICU data file. This function is not thread-safe. Use it before calling ICU APIs from multiple threads.
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Floating point utility to calculate the ceiling of a double.
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Returns the number of digits after the decimal point in a double number x.
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Floating point utility to calculate the absolute value of a double.
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Floating point utility to calculate the floor of a double.
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Floating point utility to calculate the maximum value of two doubles.
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Floating point utility to calculate the minimum value of two doubles.
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Floating point utility to calculate the remainder of a double divided by another double.
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Please use ucnv_getDefaultName() instead. Return the default codepage for this platform and locale. This function can call setlocale() on Unix platforms. Please read the platform documentation on setlocale() before calling this function.
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Please use uloc_getDefault() instead. Return the default locale ID string by querying ths system, or zero if one cannot be found. This function can call setlocale() on Unix platforms. Please read the platform documentation on setlocale() before calling this function.
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Floating point utility that returns an infinite value.
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Floating point utility that returns a Not a Number (NaN) value.
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Get UTC (GMT) time measured in seconds since 0:00 on 1/1/70.
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Floating point utility to determine if a double has an infinite value.
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Check if a char string only contains invariant characters. See utypes.h for details.
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Check if a Unicode string only contains invariant characters. See utypes.h for details.
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Floating point utility to determine if a double is Not a Number (NaN).
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Floating point utility to determine if a double has a negative infinite value.
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Floating point utility to determine if a double has a positive infinite value.
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Floating point utility to calculate the logarithm of a double.
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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.)
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Private utility to calculate the maximum value of two integers.
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Return the largest positive number that can be represented by an integer type of arbitrary bit length.
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Private utility to calculate the minimum value of two integers.
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Floating point utility to calculate the fractional and integer parts of a double.
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Floating point utility to calculate d to the power of exponent (d^exponent).
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Floating point utility to calculate 10 to the power of exponent (10^exponent).
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Does common notion of rounding e.g. uprv_floor(x + 0.5);
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Difference in seconds between coordinated universal time and local time. E.g., -28,800 for PST (GMT-8hrs)
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Floating point utility to truncate a double.
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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.
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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.
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