| Current File : //opt/alt/libicu/usr/include/unicode/putil.h |
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
* Copyright (C) 1997-2014, 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"
/**
* \file
* \brief C API: Platform Utilities
*/
/*==========================================================================*/
/* Platform utilities */
/*==========================================================================*/
/**
* Platform utilities isolates the platform dependencies of the
* library. For each platform which this code is ported to, these
* functions may have to be re-implemented.
*/
/**
* 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 specified at ICU build time
* <code>
* \code
* #define ICU_DATA_DIR "path"
* \endcode
* </code> use that,
* otherwise no data directory is available.
*
* @return the data directory, or an empty string ("") if no data directory has
* been specified.
*
* @stable ICU 2.0
*/
U_STABLE const char* U_EXPORT2 u_getDataDirectory(void);
/**
* 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.
*
* @param directory The directory to be set.
*
* @see u_init
* @stable ICU 2.0
*/
U_STABLE void U_EXPORT2 u_setDataDirectory(const char *directory);
#ifndef U_HIDE_INTERNAL_API
/**
* Return the time zone files override directory, or an empty string if
* no directory was specified. Certain time zone resources will be preferentially
* loaded from individual files in this directory.
*
* @return the time zone data override directory.
* @internal
*/
U_INTERNAL const char * U_EXPORT2 u_getTimeZoneFilesDirectory(UErrorCode *status);
/**
* Set the time zone files override directory.
* This function is not thread safe; it must not be called concurrently with
* u_getTimeZoneFilesDirectory() or any other use of ICU time zone functions.
* This function should only be called before using any ICU service that
* will access the time zone data.
* @internal
*/
U_INTERNAL void U_EXPORT2 u_setTimeZoneFilesDirectory(const char *path, UErrorCode *status);
#endif /* U_HIDE_INTERNAL_API */
/**
* @{
* Filesystem file and path separator characters.
* Example: '/' and ':' on Unix, '\\' and ';' on Windows.
* @stable ICU 2.0
*/
#if U_PLATFORM_USES_ONLY_WIN32_API
# define U_FILE_SEP_CHAR '\\'
# 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 ";"
#else
# define U_FILE_SEP_CHAR '/'
# 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 ":"
#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 U_CHARSET_FAMILY.
*
* @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>.
*
* @see U_CHARSET_FAMILY
* @stable ICU 2.0
*/
U_STABLE void U_EXPORT2
u_charsToUChars(const char *cs, UChar *us, int32_t 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 U_CHARSET_FAMILY.
*
* @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>.
*
* @see U_CHARSET_FAMILY
* @stable ICU 2.0
*/
U_STABLE void U_EXPORT2
u_UCharsToChars(const UChar *us, char *cs, int32_t length);
#endif