Check in the pristine copy of ICU 4.6...

icu46/source/common/unicode/putil.h

+/*
+******************************************************************************
+*
+*   Copyright (C) 1997-2009, 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
+  */
+
+/** 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.
+ */
+
+/**
+ * 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
+ *      <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);
+
+#if !U_CHARSET_IS_UTF8
+/**
+ * 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.
+ * @return the default codepage for this platform 
+ * @internal
+ */
+U_INTERNAL const char*  U_EXPORT2 uprv_getDefaultCodepage(void);
+#endif
+
+/**
+ * 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.
+ * @return the default locale ID string
+ * @internal
+ */
+U_INTERNAL const char*  U_EXPORT2 uprv_getDefaultLocaleID(void);
+
+/**
+ * @{
+ * Filesystem file and path separator characters.
+ * Example: '/' and ':' on Unix, '\\' and ';' on Windows.
+ * @stable ICU 2.0
+ */
+#ifdef XP_MAC
+#   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 ";"
+#elif defined(U_WINDOWS)
+#   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