1606 lines
68 KiB
C
1606 lines
68 KiB
C
/*
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**********************************************************************
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* Copyright (C) 1998-2009, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*
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* File ustring.h
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*
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* Modification History:
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*
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* Date Name Description
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* 12/07/98 bertrand Creation.
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******************************************************************************
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*/
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#ifndef USTRING_H
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#define USTRING_H
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#include "unicode/utypes.h"
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#include "unicode/putil.h"
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#include "unicode/uiter.h"
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/** Simple declaration for u_strToTitle() to avoid including unicode/ubrk.h. @stable ICU 2.1*/
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#ifndef UBRK_TYPEDEF_UBREAK_ITERATOR
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# define UBRK_TYPEDEF_UBREAK_ITERATOR
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typedef void UBreakIterator;
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#endif
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/**
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* \file
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* \brief C API: Unicode string handling functions
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*
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* These C API functions provide general Unicode string handling.
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*
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* Some functions are equivalent in name, signature, and behavior to the ANSI C <string.h>
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* functions. (For example, they do not check for bad arguments like NULL string pointers.)
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* In some cases, only the thread-safe variant of such a function is implemented here
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* (see u_strtok_r()).
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*
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* Other functions provide more Unicode-specific functionality like locale-specific
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* upper/lower-casing and string comparison in code point order.
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*
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* ICU uses 16-bit Unicode (UTF-16) in the form of arrays of UChar code units.
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* UTF-16 encodes each Unicode code point with either one or two UChar code units.
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* (This is the default form of Unicode, and a forward-compatible extension of the original,
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* fixed-width form that was known as UCS-2. UTF-16 superseded UCS-2 with Unicode 2.0
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* in 1996.)
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*
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* Some APIs accept a 32-bit UChar32 value for a single code point.
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*
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* ICU also handles 16-bit Unicode text with unpaired surrogates.
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* Such text is not well-formed UTF-16.
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* Code-point-related functions treat unpaired surrogates as surrogate code points,
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* i.e., as separate units.
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*
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* Although UTF-16 is a variable-width encoding form (like some legacy multi-byte encodings),
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* it is much more efficient even for random access because the code unit values
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* for single-unit characters vs. lead units vs. trail units are completely disjoint.
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* This means that it is easy to determine character (code point) boundaries from
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* random offsets in the string.
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*
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* Unicode (UTF-16) string processing is optimized for the single-unit case.
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* Although it is important to support supplementary characters
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* (which use pairs of lead/trail code units called "surrogates"),
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* their occurrence is rare. Almost all characters in modern use require only
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* a single UChar code unit (i.e., their code point values are <=0xffff).
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*
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* For more details see the User Guide Strings chapter (http://icu-project.org/userguide/strings.html).
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* For a discussion of the handling of unpaired surrogates see also
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* Jitterbug 2145 and its icu mailing list proposal on 2002-sep-18.
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*/
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/**
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* \defgroup ustring_ustrlen String Length
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* \ingroup ustring_strlen
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*/
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/*@{*/
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/**
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* Determine the length of an array of UChar.
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*
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* @param s The array of UChars, NULL (U+0000) terminated.
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* @return The number of UChars in <code>chars</code>, minus the terminator.
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* @stable ICU 2.0
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*/
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U_STABLE int32_t U_EXPORT2
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u_strlen(const UChar *s);
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/*@}*/
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/**
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* Count Unicode code points in the length UChar code units of the string.
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* A code point may occupy either one or two UChar code units.
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* Counting code points involves reading all code units.
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*
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* This functions is basically the inverse of the U16_FWD_N() macro (see utf.h).
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*
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* @param s The input string.
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* @param length The number of UChar code units to be checked, or -1 to count all
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* code points before the first NUL (U+0000).
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* @return The number of code points in the specified code units.
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* @stable ICU 2.0
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*/
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U_STABLE int32_t U_EXPORT2
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u_countChar32(const UChar *s, int32_t length);
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/**
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* Check if the string contains more Unicode code points than a certain number.
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* This is more efficient than counting all code points in the entire string
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* and comparing that number with a threshold.
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* This function may not need to scan the string at all if the length is known
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* (not -1 for NUL-termination) and falls within a certain range, and
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* never needs to count more than 'number+1' code points.
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* Logically equivalent to (u_countChar32(s, length)>number).
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* A Unicode code point may occupy either one or two UChar code units.
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*
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* @param s The input string.
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* @param length The length of the string, or -1 if it is NUL-terminated.
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* @param number The number of code points in the string is compared against
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* the 'number' parameter.
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* @return Boolean value for whether the string contains more Unicode code points
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* than 'number'. Same as (u_countChar32(s, length)>number).
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* @stable ICU 2.4
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*/
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U_STABLE UBool U_EXPORT2
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u_strHasMoreChar32Than(const UChar *s, int32_t length, int32_t number);
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/**
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* Concatenate two ustrings. Appends a copy of <code>src</code>,
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* including the null terminator, to <code>dst</code>. The initial copied
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* character from <code>src</code> overwrites the null terminator in <code>dst</code>.
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*
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* @param dst The destination string.
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* @param src The source string.
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* @return A pointer to <code>dst</code>.
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* @stable ICU 2.0
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*/
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U_STABLE UChar* U_EXPORT2
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u_strcat(UChar *dst,
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const UChar *src);
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/**
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* Concatenate two ustrings.
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* Appends at most <code>n</code> characters from <code>src</code> to <code>dst</code>.
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* Adds a terminating NUL.
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* If src is too long, then only <code>n-1</code> characters will be copied
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* before the terminating NUL.
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* If <code>n<=0</code> then dst is not modified.
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*
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* @param dst The destination string.
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* @param src The source string.
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* @param n The maximum number of characters to compare.
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* @return A pointer to <code>dst</code>.
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* @stable ICU 2.0
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*/
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U_STABLE UChar* U_EXPORT2
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u_strncat(UChar *dst,
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const UChar *src,
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int32_t n);
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/**
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* Find the first occurrence of a substring in a string.
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* The substring is found at code point boundaries.
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* That means that if the substring begins with
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* a trail surrogate or ends with a lead surrogate,
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* then it is found only if these surrogates stand alone in the text.
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* Otherwise, the substring edge units would be matched against
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* halves of surrogate pairs.
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*
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* @param s The string to search (NUL-terminated).
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* @param substring The substring to find (NUL-terminated).
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* @return A pointer to the first occurrence of <code>substring</code> in <code>s</code>,
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* or <code>s</code> itself if the <code>substring</code> is empty,
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* or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
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* @stable ICU 2.0
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*
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* @see u_strrstr
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* @see u_strFindFirst
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* @see u_strFindLast
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*/
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U_STABLE UChar * U_EXPORT2
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u_strstr(const UChar *s, const UChar *substring);
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/**
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* Find the first occurrence of a substring in a string.
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* The substring is found at code point boundaries.
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* That means that if the substring begins with
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* a trail surrogate or ends with a lead surrogate,
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* then it is found only if these surrogates stand alone in the text.
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* Otherwise, the substring edge units would be matched against
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* halves of surrogate pairs.
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*
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* @param s The string to search.
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* @param length The length of s (number of UChars), or -1 if it is NUL-terminated.
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* @param substring The substring to find (NUL-terminated).
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* @param subLength The length of substring (number of UChars), or -1 if it is NUL-terminated.
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* @return A pointer to the first occurrence of <code>substring</code> in <code>s</code>,
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* or <code>s</code> itself if the <code>substring</code> is empty,
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* or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
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* @stable ICU 2.4
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*
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* @see u_strstr
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* @see u_strFindLast
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*/
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U_STABLE UChar * U_EXPORT2
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u_strFindFirst(const UChar *s, int32_t length, const UChar *substring, int32_t subLength);
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/**
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* Find the first occurrence of a BMP code point in a string.
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* A surrogate code point is found only if its match in the text is not
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* part of a surrogate pair.
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* A NUL character is found at the string terminator.
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*
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* @param s The string to search (NUL-terminated).
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* @param c The BMP code point to find.
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* @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
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* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
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* @stable ICU 2.0
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*
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* @see u_strchr32
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* @see u_memchr
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* @see u_strstr
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* @see u_strFindFirst
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*/
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U_STABLE UChar * U_EXPORT2
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u_strchr(const UChar *s, UChar c);
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/**
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* Find the first occurrence of a code point in a string.
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* A surrogate code point is found only if its match in the text is not
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* part of a surrogate pair.
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* A NUL character is found at the string terminator.
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*
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* @param s The string to search (NUL-terminated).
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* @param c The code point to find.
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* @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
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* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
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* @stable ICU 2.0
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*
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* @see u_strchr
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* @see u_memchr32
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* @see u_strstr
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* @see u_strFindFirst
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*/
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U_STABLE UChar * U_EXPORT2
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u_strchr32(const UChar *s, UChar32 c);
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/**
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* Find the last occurrence of a substring in a string.
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* The substring is found at code point boundaries.
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* That means that if the substring begins with
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* a trail surrogate or ends with a lead surrogate,
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* then it is found only if these surrogates stand alone in the text.
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* Otherwise, the substring edge units would be matched against
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* halves of surrogate pairs.
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*
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* @param s The string to search (NUL-terminated).
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* @param substring The substring to find (NUL-terminated).
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* @return A pointer to the last occurrence of <code>substring</code> in <code>s</code>,
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* or <code>s</code> itself if the <code>substring</code> is empty,
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* or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
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* @stable ICU 2.4
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*
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* @see u_strstr
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* @see u_strFindFirst
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* @see u_strFindLast
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*/
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U_STABLE UChar * U_EXPORT2
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u_strrstr(const UChar *s, const UChar *substring);
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/**
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* Find the last occurrence of a substring in a string.
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* The substring is found at code point boundaries.
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* That means that if the substring begins with
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* a trail surrogate or ends with a lead surrogate,
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* then it is found only if these surrogates stand alone in the text.
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* Otherwise, the substring edge units would be matched against
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* halves of surrogate pairs.
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*
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* @param s The string to search.
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* @param length The length of s (number of UChars), or -1 if it is NUL-terminated.
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* @param substring The substring to find (NUL-terminated).
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* @param subLength The length of substring (number of UChars), or -1 if it is NUL-terminated.
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* @return A pointer to the last occurrence of <code>substring</code> in <code>s</code>,
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* or <code>s</code> itself if the <code>substring</code> is empty,
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* or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
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* @stable ICU 2.4
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*
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* @see u_strstr
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* @see u_strFindLast
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*/
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U_STABLE UChar * U_EXPORT2
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u_strFindLast(const UChar *s, int32_t length, const UChar *substring, int32_t subLength);
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/**
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* Find the last occurrence of a BMP code point in a string.
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* A surrogate code point is found only if its match in the text is not
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* part of a surrogate pair.
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* A NUL character is found at the string terminator.
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*
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* @param s The string to search (NUL-terminated).
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* @param c The BMP code point to find.
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* @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
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* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
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* @stable ICU 2.4
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*
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* @see u_strrchr32
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* @see u_memrchr
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* @see u_strrstr
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* @see u_strFindLast
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*/
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U_STABLE UChar * U_EXPORT2
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u_strrchr(const UChar *s, UChar c);
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/**
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* Find the last occurrence of a code point in a string.
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* A surrogate code point is found only if its match in the text is not
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* part of a surrogate pair.
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* A NUL character is found at the string terminator.
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*
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* @param s The string to search (NUL-terminated).
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* @param c The code point to find.
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* @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
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* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
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* @stable ICU 2.4
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*
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* @see u_strrchr
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* @see u_memchr32
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* @see u_strrstr
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* @see u_strFindLast
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*/
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U_STABLE UChar * U_EXPORT2
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u_strrchr32(const UChar *s, UChar32 c);
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/**
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* Locates the first occurrence in the string <code>string</code> of any of the characters
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* in the string <code>matchSet</code>.
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* Works just like C's strpbrk but with Unicode.
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*
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* @param string The string in which to search, NUL-terminated.
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* @param matchSet A NUL-terminated string defining a set of code points
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* for which to search in the text string.
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* @return A pointer to the character in <code>string</code> that matches one of the
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* characters in <code>matchSet</code>, or NULL if no such character is found.
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* @stable ICU 2.0
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*/
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U_STABLE UChar * U_EXPORT2
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u_strpbrk(const UChar *string, const UChar *matchSet);
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/**
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* Returns the number of consecutive characters in <code>string</code>,
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* beginning with the first, that do not occur somewhere in <code>matchSet</code>.
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* Works just like C's strcspn but with Unicode.
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*
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* @param string The string in which to search, NUL-terminated.
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* @param matchSet A NUL-terminated string defining a set of code points
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* for which to search in the text string.
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* @return The number of initial characters in <code>string</code> that do not
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* occur in <code>matchSet</code>.
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* @see u_strspn
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* @stable ICU 2.0
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*/
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U_STABLE int32_t U_EXPORT2
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u_strcspn(const UChar *string, const UChar *matchSet);
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/**
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* Returns the number of consecutive characters in <code>string</code>,
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* beginning with the first, that occur somewhere in <code>matchSet</code>.
|
|
* Works just like C's strspn but with Unicode.
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|
*
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|
* @param string The string in which to search, NUL-terminated.
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* @param matchSet A NUL-terminated string defining a set of code points
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* for which to search in the text string.
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* @return The number of initial characters in <code>string</code> that do
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* occur in <code>matchSet</code>.
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* @see u_strcspn
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* @stable ICU 2.0
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*/
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U_STABLE int32_t U_EXPORT2
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u_strspn(const UChar *string, const UChar *matchSet);
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/**
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|
* The string tokenizer API allows an application to break a string into
|
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* tokens. Unlike strtok(), the saveState (the current pointer within the
|
|
* original string) is maintained in saveState. In the first call, the
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* argument src is a pointer to the string. In subsequent calls to
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* return successive tokens of that string, src must be specified as
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* NULL. The value saveState is set by this function to maintain the
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|
* function's position within the string, and on each subsequent call
|
|
* you must give this argument the same variable. This function does
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* handle surrogate pairs. This function is similar to the strtok_r()
|
|
* the POSIX Threads Extension (1003.1c-1995) version.
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|
*
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|
* @param src String containing token(s). This string will be modified.
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|
* After the first call to u_strtok_r(), this argument must
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|
* be NULL to get to the next token.
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|
* @param delim Set of delimiter characters (Unicode code points).
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|
* @param saveState The current pointer within the original string,
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|
* which is set by this function. The saveState
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|
* parameter should the address of a local variable of type
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|
* UChar *. (i.e. defined "Uhar *myLocalSaveState" and use
|
|
* &myLocalSaveState for this parameter).
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|
* @return A pointer to the next token found in src, or NULL
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|
* when there are no more tokens.
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|
* @stable ICU 2.0
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|
*/
|
|
U_STABLE UChar * U_EXPORT2
|
|
u_strtok_r(UChar *src,
|
|
const UChar *delim,
|
|
UChar **saveState);
|
|
|
|
/**
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|
* Compare two Unicode strings for bitwise equality (code unit order).
|
|
*
|
|
* @param s1 A string to compare.
|
|
* @param s2 A string to compare.
|
|
* @return 0 if <code>s1</code> and <code>s2</code> are bitwise equal; a negative
|
|
* value if <code>s1</code> is bitwise less than <code>s2,</code>; a positive
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* value if <code>s1</code> is bitwise greater than <code>s2</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
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u_strcmp(const UChar *s1,
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const UChar *s2);
|
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|
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/**
|
|
* Compare two Unicode strings in code point order.
|
|
* See u_strCompare for details.
|
|
*
|
|
* @param s1 A string to compare.
|
|
* @param s2 A string to compare.
|
|
* @return a negative/zero/positive integer corresponding to whether
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* the first string is less than/equal to/greater than the second one
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* in code point order
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|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strcmpCodePointOrder(const UChar *s1, const UChar *s2);
|
|
|
|
/**
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|
* Compare two Unicode strings (binary order).
|
|
*
|
|
* The comparison can be done in code unit order or in code point order.
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|
* They differ only in UTF-16 when
|
|
* comparing supplementary code points (U+10000..U+10ffff)
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* to BMP code points near the end of the BMP (i.e., U+e000..U+ffff).
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|
* In code unit order, high BMP code points sort after supplementary code points
|
|
* because they are stored as pairs of surrogates which are at U+d800..U+dfff.
|
|
*
|
|
* This functions works with strings of different explicitly specified lengths
|
|
* unlike the ANSI C-like u_strcmp() and u_memcmp() etc.
|
|
* NUL-terminated strings are possible with length arguments of -1.
|
|
*
|
|
* @param s1 First source string.
|
|
* @param length1 Length of first source string, or -1 if NUL-terminated.
|
|
*
|
|
* @param s2 Second source string.
|
|
* @param length2 Length of second source string, or -1 if NUL-terminated.
|
|
*
|
|
* @param codePointOrder Choose between code unit order (FALSE)
|
|
* and code point order (TRUE).
|
|
*
|
|
* @return <0 or 0 or >0 as usual for string comparisons
|
|
*
|
|
* @stable ICU 2.2
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strCompare(const UChar *s1, int32_t length1,
|
|
const UChar *s2, int32_t length2,
|
|
UBool codePointOrder);
|
|
|
|
/**
|
|
* Compare two Unicode strings (binary order)
|
|
* as presented by UCharIterator objects.
|
|
* Works otherwise just like u_strCompare().
|
|
*
|
|
* Both iterators are reset to their start positions.
|
|
* When the function returns, it is undefined where the iterators
|
|
* have stopped.
|
|
*
|
|
* @param iter1 First source string iterator.
|
|
* @param iter2 Second source string iterator.
|
|
* @param codePointOrder Choose between code unit order (FALSE)
|
|
* and code point order (TRUE).
|
|
*
|
|
* @return <0 or 0 or >0 as usual for string comparisons
|
|
*
|
|
* @see u_strCompare
|
|
*
|
|
* @stable ICU 2.6
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strCompareIter(UCharIterator *iter1, UCharIterator *iter2, UBool codePointOrder);
|
|
|
|
#ifndef U_COMPARE_CODE_POINT_ORDER
|
|
/* see also unistr.h and unorm.h */
|
|
/**
|
|
* Option bit for u_strCaseCompare, u_strcasecmp, unorm_compare, etc:
|
|
* Compare strings in code point order instead of code unit order.
|
|
* @stable ICU 2.2
|
|
*/
|
|
#define U_COMPARE_CODE_POINT_ORDER 0x8000
|
|
#endif
|
|
|
|
/**
|
|
* Compare two strings case-insensitively using full case folding.
|
|
* This is equivalent to
|
|
* u_strCompare(u_strFoldCase(s1, options),
|
|
* u_strFoldCase(s2, options),
|
|
* (options&U_COMPARE_CODE_POINT_ORDER)!=0).
|
|
*
|
|
* The comparison can be done in UTF-16 code unit order or in code point order.
|
|
* They differ only when comparing supplementary code points (U+10000..U+10ffff)
|
|
* to BMP code points near the end of the BMP (i.e., U+e000..U+ffff).
|
|
* In code unit order, high BMP code points sort after supplementary code points
|
|
* because they are stored as pairs of surrogates which are at U+d800..U+dfff.
|
|
*
|
|
* This functions works with strings of different explicitly specified lengths
|
|
* unlike the ANSI C-like u_strcmp() and u_memcmp() etc.
|
|
* NUL-terminated strings are possible with length arguments of -1.
|
|
*
|
|
* @param s1 First source string.
|
|
* @param length1 Length of first source string, or -1 if NUL-terminated.
|
|
*
|
|
* @param s2 Second source string.
|
|
* @param length2 Length of second source string, or -1 if NUL-terminated.
|
|
*
|
|
* @param options A bit set of options:
|
|
* - U_FOLD_CASE_DEFAULT or 0 is used for default options:
|
|
* Comparison in code unit order with default case folding.
|
|
*
|
|
* - U_COMPARE_CODE_POINT_ORDER
|
|
* Set to choose code point order instead of code unit order
|
|
* (see u_strCompare for details).
|
|
*
|
|
* - U_FOLD_CASE_EXCLUDE_SPECIAL_I
|
|
*
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
*
|
|
* @return <0 or 0 or >0 as usual for string comparisons
|
|
*
|
|
* @stable ICU 2.2
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strCaseCompare(const UChar *s1, int32_t length1,
|
|
const UChar *s2, int32_t length2,
|
|
uint32_t options,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Compare two ustrings for bitwise equality.
|
|
* Compares at most <code>n</code> characters.
|
|
*
|
|
* @param ucs1 A string to compare.
|
|
* @param ucs2 A string to compare.
|
|
* @param n The maximum number of characters to compare.
|
|
* @return 0 if <code>s1</code> and <code>s2</code> are bitwise equal; a negative
|
|
* value if <code>s1</code> is bitwise less than <code>s2</code>; a positive
|
|
* value if <code>s1</code> is bitwise greater than <code>s2</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strncmp(const UChar *ucs1,
|
|
const UChar *ucs2,
|
|
int32_t n);
|
|
|
|
/**
|
|
* Compare two Unicode strings in code point order.
|
|
* This is different in UTF-16 from u_strncmp() if supplementary characters are present.
|
|
* For details, see u_strCompare().
|
|
*
|
|
* @param s1 A string to compare.
|
|
* @param s2 A string to compare.
|
|
* @param n The maximum number of characters to compare.
|
|
* @return a negative/zero/positive integer corresponding to whether
|
|
* the first string is less than/equal to/greater than the second one
|
|
* in code point order
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strncmpCodePointOrder(const UChar *s1, const UChar *s2, int32_t n);
|
|
|
|
/**
|
|
* Compare two strings case-insensitively using full case folding.
|
|
* This is equivalent to u_strcmp(u_strFoldCase(s1, options), u_strFoldCase(s2, options)).
|
|
*
|
|
* @param s1 A string to compare.
|
|
* @param s2 A string to compare.
|
|
* @param options A bit set of options:
|
|
* - U_FOLD_CASE_DEFAULT or 0 is used for default options:
|
|
* Comparison in code unit order with default case folding.
|
|
*
|
|
* - U_COMPARE_CODE_POINT_ORDER
|
|
* Set to choose code point order instead of code unit order
|
|
* (see u_strCompare for details).
|
|
*
|
|
* - U_FOLD_CASE_EXCLUDE_SPECIAL_I
|
|
*
|
|
* @return A negative, zero, or positive integer indicating the comparison result.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strcasecmp(const UChar *s1, const UChar *s2, uint32_t options);
|
|
|
|
/**
|
|
* Compare two strings case-insensitively using full case folding.
|
|
* This is equivalent to u_strcmp(u_strFoldCase(s1, at most n, options),
|
|
* u_strFoldCase(s2, at most n, options)).
|
|
*
|
|
* @param s1 A string to compare.
|
|
* @param s2 A string to compare.
|
|
* @param n The maximum number of characters each string to case-fold and then compare.
|
|
* @param options A bit set of options:
|
|
* - U_FOLD_CASE_DEFAULT or 0 is used for default options:
|
|
* Comparison in code unit order with default case folding.
|
|
*
|
|
* - U_COMPARE_CODE_POINT_ORDER
|
|
* Set to choose code point order instead of code unit order
|
|
* (see u_strCompare for details).
|
|
*
|
|
* - U_FOLD_CASE_EXCLUDE_SPECIAL_I
|
|
*
|
|
* @return A negative, zero, or positive integer indicating the comparison result.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strncasecmp(const UChar *s1, const UChar *s2, int32_t n, uint32_t options);
|
|
|
|
/**
|
|
* Compare two strings case-insensitively using full case folding.
|
|
* This is equivalent to u_strcmp(u_strFoldCase(s1, n, options),
|
|
* u_strFoldCase(s2, n, options)).
|
|
*
|
|
* @param s1 A string to compare.
|
|
* @param s2 A string to compare.
|
|
* @param length The number of characters in each string to case-fold and then compare.
|
|
* @param options A bit set of options:
|
|
* - U_FOLD_CASE_DEFAULT or 0 is used for default options:
|
|
* Comparison in code unit order with default case folding.
|
|
*
|
|
* - U_COMPARE_CODE_POINT_ORDER
|
|
* Set to choose code point order instead of code unit order
|
|
* (see u_strCompare for details).
|
|
*
|
|
* - U_FOLD_CASE_EXCLUDE_SPECIAL_I
|
|
*
|
|
* @return A negative, zero, or positive integer indicating the comparison result.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_memcasecmp(const UChar *s1, const UChar *s2, int32_t length, uint32_t options);
|
|
|
|
/**
|
|
* Copy a ustring. Adds a null terminator.
|
|
*
|
|
* @param dst The destination string.
|
|
* @param src The source string.
|
|
* @return A pointer to <code>dst</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_strcpy(UChar *dst,
|
|
const UChar *src);
|
|
|
|
/**
|
|
* Copy a ustring.
|
|
* Copies at most <code>n</code> characters. The result will be null terminated
|
|
* if the length of <code>src</code> is less than <code>n</code>.
|
|
*
|
|
* @param dst The destination string.
|
|
* @param src The source string.
|
|
* @param n The maximum number of characters to copy.
|
|
* @return A pointer to <code>dst</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_strncpy(UChar *dst,
|
|
const UChar *src,
|
|
int32_t n);
|
|
|
|
#if !UCONFIG_NO_CONVERSION
|
|
|
|
/**
|
|
* Copy a byte string encoded in the default codepage to a ustring.
|
|
* Adds a null terminator.
|
|
* Performs a host byte to UChar conversion
|
|
*
|
|
* @param dst The destination string.
|
|
* @param src The source string.
|
|
* @return A pointer to <code>dst</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2 u_uastrcpy(UChar *dst,
|
|
const char *src );
|
|
|
|
/**
|
|
* Copy a byte string encoded in the default codepage to a ustring.
|
|
* Copies at most <code>n</code> characters. The result will be null terminated
|
|
* if the length of <code>src</code> is less than <code>n</code>.
|
|
* Performs a host byte to UChar conversion
|
|
*
|
|
* @param dst The destination string.
|
|
* @param src The source string.
|
|
* @param n The maximum number of characters to copy.
|
|
* @return A pointer to <code>dst</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2 u_uastrncpy(UChar *dst,
|
|
const char *src,
|
|
int32_t n);
|
|
|
|
/**
|
|
* Copy ustring to a byte string encoded in the default codepage.
|
|
* Adds a null terminator.
|
|
* Performs a UChar to host byte conversion
|
|
*
|
|
* @param dst The destination string.
|
|
* @param src The source string.
|
|
* @return A pointer to <code>dst</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE char* U_EXPORT2 u_austrcpy(char *dst,
|
|
const UChar *src );
|
|
|
|
/**
|
|
* Copy ustring to a byte string encoded in the default codepage.
|
|
* Copies at most <code>n</code> characters. The result will be null terminated
|
|
* if the length of <code>src</code> is less than <code>n</code>.
|
|
* Performs a UChar to host byte conversion
|
|
*
|
|
* @param dst The destination string.
|
|
* @param src The source string.
|
|
* @param n The maximum number of characters to copy.
|
|
* @return A pointer to <code>dst</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE char* U_EXPORT2 u_austrncpy(char *dst,
|
|
const UChar *src,
|
|
int32_t n );
|
|
|
|
#endif
|
|
|
|
/**
|
|
* Synonym for memcpy(), but with UChars only.
|
|
* @param dest The destination string
|
|
* @param src The source string
|
|
* @param count The number of characters to copy
|
|
* @return A pointer to <code>dest</code>
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_memcpy(UChar *dest, const UChar *src, int32_t count);
|
|
|
|
/**
|
|
* Synonym for memmove(), but with UChars only.
|
|
* @param dest The destination string
|
|
* @param src The source string
|
|
* @param count The number of characters to move
|
|
* @return A pointer to <code>dest</code>
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_memmove(UChar *dest, const UChar *src, int32_t count);
|
|
|
|
/**
|
|
* Initialize <code>count</code> characters of <code>dest</code> to <code>c</code>.
|
|
*
|
|
* @param dest The destination string.
|
|
* @param c The character to initialize the string.
|
|
* @param count The maximum number of characters to set.
|
|
* @return A pointer to <code>dest</code>.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_memset(UChar *dest, UChar c, int32_t count);
|
|
|
|
/**
|
|
* Compare the first <code>count</code> UChars of each buffer.
|
|
*
|
|
* @param buf1 The first string to compare.
|
|
* @param buf2 The second string to compare.
|
|
* @param count The maximum number of UChars to compare.
|
|
* @return When buf1 < buf2, a negative number is returned.
|
|
* When buf1 == buf2, 0 is returned.
|
|
* When buf1 > buf2, a positive number is returned.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_memcmp(const UChar *buf1, const UChar *buf2, int32_t count);
|
|
|
|
/**
|
|
* Compare two Unicode strings in code point order.
|
|
* This is different in UTF-16 from u_memcmp() if supplementary characters are present.
|
|
* For details, see u_strCompare().
|
|
*
|
|
* @param s1 A string to compare.
|
|
* @param s2 A string to compare.
|
|
* @param count The maximum number of characters to compare.
|
|
* @return a negative/zero/positive integer corresponding to whether
|
|
* the first string is less than/equal to/greater than the second one
|
|
* in code point order
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_memcmpCodePointOrder(const UChar *s1, const UChar *s2, int32_t count);
|
|
|
|
/**
|
|
* Find the first occurrence of a BMP code point in a string.
|
|
* A surrogate code point is found only if its match in the text is not
|
|
* part of a surrogate pair.
|
|
* A NUL character is found at the string terminator.
|
|
*
|
|
* @param s The string to search (contains <code>count</code> UChars).
|
|
* @param c The BMP code point to find.
|
|
* @param count The length of the string.
|
|
* @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
|
|
* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
|
|
* @stable ICU 2.0
|
|
*
|
|
* @see u_strchr
|
|
* @see u_memchr32
|
|
* @see u_strFindFirst
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_memchr(const UChar *s, UChar c, int32_t count);
|
|
|
|
/**
|
|
* Find the first occurrence of a code point in a string.
|
|
* A surrogate code point is found only if its match in the text is not
|
|
* part of a surrogate pair.
|
|
* A NUL character is found at the string terminator.
|
|
*
|
|
* @param s The string to search (contains <code>count</code> UChars).
|
|
* @param c The code point to find.
|
|
* @param count The length of the string.
|
|
* @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
|
|
* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
|
|
* @stable ICU 2.0
|
|
*
|
|
* @see u_strchr32
|
|
* @see u_memchr
|
|
* @see u_strFindFirst
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_memchr32(const UChar *s, UChar32 c, int32_t count);
|
|
|
|
/**
|
|
* Find the last occurrence of a BMP code point in a string.
|
|
* A surrogate code point is found only if its match in the text is not
|
|
* part of a surrogate pair.
|
|
* A NUL character is found at the string terminator.
|
|
*
|
|
* @param s The string to search (contains <code>count</code> UChars).
|
|
* @param c The BMP code point to find.
|
|
* @param count The length of the string.
|
|
* @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
|
|
* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
|
|
* @stable ICU 2.4
|
|
*
|
|
* @see u_strrchr
|
|
* @see u_memrchr32
|
|
* @see u_strFindLast
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_memrchr(const UChar *s, UChar c, int32_t count);
|
|
|
|
/**
|
|
* Find the last occurrence of a code point in a string.
|
|
* A surrogate code point is found only if its match in the text is not
|
|
* part of a surrogate pair.
|
|
* A NUL character is found at the string terminator.
|
|
*
|
|
* @param s The string to search (contains <code>count</code> UChars).
|
|
* @param c The code point to find.
|
|
* @param count The length of the string.
|
|
* @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
|
|
* or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
|
|
* @stable ICU 2.4
|
|
*
|
|
* @see u_strrchr32
|
|
* @see u_memrchr
|
|
* @see u_strFindLast
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_memrchr32(const UChar *s, UChar32 c, int32_t count);
|
|
|
|
/**
|
|
* Unicode String literals in C.
|
|
* We need one macro to declare a variable for the string
|
|
* and to statically preinitialize it if possible,
|
|
* and a second macro to dynamically intialize such a string variable if necessary.
|
|
*
|
|
* The macros are defined for maximum performance.
|
|
* They work only for strings that contain "invariant characters", i.e.,
|
|
* only latin letters, digits, and some punctuation.
|
|
* See utypes.h for details.
|
|
*
|
|
* A pair of macros for a single string must be used with the same
|
|
* parameters.
|
|
* The string parameter must be a C string literal.
|
|
* The length of the string, not including the terminating
|
|
* <code>NUL</code>, must be specified as a constant.
|
|
* The U_STRING_DECL macro should be invoked exactly once for one
|
|
* such string variable before it is used.
|
|
*
|
|
* Usage:
|
|
* <pre>
|
|
* U_STRING_DECL(ustringVar1, "Quick-Fox 2", 11);
|
|
* U_STRING_DECL(ustringVar2, "jumps 5%", 8);
|
|
* static UBool didInit=FALSE;
|
|
*
|
|
* int32_t function() {
|
|
* if(!didInit) {
|
|
* U_STRING_INIT(ustringVar1, "Quick-Fox 2", 11);
|
|
* U_STRING_INIT(ustringVar2, "jumps 5%", 8);
|
|
* didInit=TRUE;
|
|
* }
|
|
* return u_strcmp(ustringVar1, ustringVar2);
|
|
* }
|
|
* </pre>
|
|
*
|
|
* Note that the macros will NOT consistently work if their argument is another
|
|
* #define. The following will not work on all platforms, don't use it.
|
|
*
|
|
* <pre>
|
|
* #define GLUCK "Mr. Gluck"
|
|
* U_STRING_DECL(var, GLUCK, 9)
|
|
* U_STRING_INIT(var, GLUCK, 9)
|
|
* </pre>
|
|
*
|
|
* Instead, use the string literal "Mr. Gluck" as the argument to both macro
|
|
* calls.
|
|
*
|
|
*
|
|
* @stable ICU 2.0
|
|
*/
|
|
#if defined(U_DECLARE_UTF16)
|
|
# define U_STRING_DECL(var, cs, length) static const UChar var[(length)+1]=U_DECLARE_UTF16(cs)
|
|
/**@stable ICU 2.0 */
|
|
# define U_STRING_INIT(var, cs, length)
|
|
#elif U_SIZEOF_WCHAR_T==U_SIZEOF_UCHAR && (U_CHARSET_FAMILY==U_ASCII_FAMILY || (U_SIZEOF_UCHAR == 2 && defined(U_WCHAR_IS_UTF16)))
|
|
# define U_STRING_DECL(var, cs, length) static const UChar var[(length)+1]=L ## cs
|
|
/**@stable ICU 2.0 */
|
|
# define U_STRING_INIT(var, cs, length)
|
|
#elif U_SIZEOF_UCHAR==1 && U_CHARSET_FAMILY==U_ASCII_FAMILY
|
|
# define U_STRING_DECL(var, cs, length) static const UChar var[(length)+1]=cs
|
|
/**@stable ICU 2.0 */
|
|
# define U_STRING_INIT(var, cs, length)
|
|
#else
|
|
# define U_STRING_DECL(var, cs, length) static UChar var[(length)+1]
|
|
/**@stable ICU 2.0 */
|
|
# define U_STRING_INIT(var, cs, length) u_charsToUChars(cs, var, length+1)
|
|
#endif
|
|
|
|
/**
|
|
* Unescape a string of characters and write the resulting
|
|
* Unicode characters to the destination buffer. The following escape
|
|
* sequences are recognized:
|
|
*
|
|
* \\uhhhh 4 hex digits; h in [0-9A-Fa-f]
|
|
* \\Uhhhhhhhh 8 hex digits
|
|
* \\xhh 1-2 hex digits
|
|
* \\x{h...} 1-8 hex digits
|
|
* \\ooo 1-3 octal digits; o in [0-7]
|
|
* \\cX control-X; X is masked with 0x1F
|
|
*
|
|
* as well as the standard ANSI C escapes:
|
|
*
|
|
* \\a => U+0007, \\b => U+0008, \\t => U+0009, \\n => U+000A,
|
|
* \\v => U+000B, \\f => U+000C, \\r => U+000D, \\e => U+001B,
|
|
* \\" => U+0022, \\' => U+0027, \\? => U+003F, \\\\ => U+005C
|
|
*
|
|
* Anything else following a backslash is generically escaped. For
|
|
* example, "[a\\-z]" returns "[a-z]".
|
|
*
|
|
* If an escape sequence is ill-formed, this method returns an empty
|
|
* string. An example of an ill-formed sequence is "\\u" followed by
|
|
* fewer than 4 hex digits.
|
|
*
|
|
* The above characters are recognized in the compiler's codepage,
|
|
* that is, they are coded as 'u', '\\', etc. Characters that are
|
|
* not parts of escape sequences are converted using u_charsToUChars().
|
|
*
|
|
* This function is similar to UnicodeString::unescape() but not
|
|
* identical to it. The latter takes a source UnicodeString, so it
|
|
* does escape recognition but no conversion.
|
|
*
|
|
* @param src a zero-terminated string of invariant characters
|
|
* @param dest pointer to buffer to receive converted and unescaped
|
|
* text and, if there is room, a zero terminator. May be NULL for
|
|
* preflighting, in which case no UChars will be written, but the
|
|
* return value will still be valid. On error, an empty string is
|
|
* stored here (if possible).
|
|
* @param destCapacity the number of UChars that may be written at
|
|
* dest. Ignored if dest == NULL.
|
|
* @return the length of unescaped string.
|
|
* @see u_unescapeAt
|
|
* @see UnicodeString#unescape()
|
|
* @see UnicodeString#unescapeAt()
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_unescape(const char *src,
|
|
UChar *dest, int32_t destCapacity);
|
|
|
|
U_CDECL_BEGIN
|
|
/**
|
|
* Callback function for u_unescapeAt() that returns a character of
|
|
* the source text given an offset and a context pointer. The context
|
|
* pointer will be whatever is passed into u_unescapeAt().
|
|
*
|
|
* @param offset pointer to the offset that will be passed to u_unescapeAt().
|
|
* @param context an opaque pointer passed directly into u_unescapeAt()
|
|
* @return the character represented by the escape sequence at
|
|
* offset
|
|
* @see u_unescapeAt
|
|
* @stable ICU 2.0
|
|
*/
|
|
typedef UChar (U_CALLCONV *UNESCAPE_CHAR_AT)(int32_t offset, void *context);
|
|
U_CDECL_END
|
|
|
|
/**
|
|
* Unescape a single sequence. The character at offset-1 is assumed
|
|
* (without checking) to be a backslash. This method takes a callback
|
|
* pointer to a function that returns the UChar at a given offset. By
|
|
* varying this callback, ICU functions are able to unescape char*
|
|
* strings, UnicodeString objects, and UFILE pointers.
|
|
*
|
|
* If offset is out of range, or if the escape sequence is ill-formed,
|
|
* (UChar32)0xFFFFFFFF is returned. See documentation of u_unescape()
|
|
* for a list of recognized sequences.
|
|
*
|
|
* @param charAt callback function that returns a UChar of the source
|
|
* text given an offset and a context pointer.
|
|
* @param offset pointer to the offset that will be passed to charAt.
|
|
* The offset value will be updated upon return to point after the
|
|
* last parsed character of the escape sequence. On error the offset
|
|
* is unchanged.
|
|
* @param length the number of characters in the source text. The
|
|
* last character of the source text is considered to be at offset
|
|
* length-1.
|
|
* @param context an opaque pointer passed directly into charAt.
|
|
* @return the character represented by the escape sequence at
|
|
* offset, or (UChar32)0xFFFFFFFF on error.
|
|
* @see u_unescape()
|
|
* @see UnicodeString#unescape()
|
|
* @see UnicodeString#unescapeAt()
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar32 U_EXPORT2
|
|
u_unescapeAt(UNESCAPE_CHAR_AT charAt,
|
|
int32_t *offset,
|
|
int32_t length,
|
|
void *context);
|
|
|
|
/**
|
|
* Uppercase the characters in a string.
|
|
* Casing is locale-dependent and context-sensitive.
|
|
* The result may be longer or shorter than the original.
|
|
* The source string and the destination buffer are allowed to overlap.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the result
|
|
* without writing any of the result string.
|
|
* @param src The original string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param locale The locale to consider, or "" for the root locale or NULL for the default locale.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The length of the result string. It may be greater than destCapacity. In that case,
|
|
* only some of the result was written to the destination buffer.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strToUpper(UChar *dest, int32_t destCapacity,
|
|
const UChar *src, int32_t srcLength,
|
|
const char *locale,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Lowercase the characters in a string.
|
|
* Casing is locale-dependent and context-sensitive.
|
|
* The result may be longer or shorter than the original.
|
|
* The source string and the destination buffer are allowed to overlap.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the result
|
|
* without writing any of the result string.
|
|
* @param src The original string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param locale The locale to consider, or "" for the root locale or NULL for the default locale.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The length of the result string. It may be greater than destCapacity. In that case,
|
|
* only some of the result was written to the destination buffer.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strToLower(UChar *dest, int32_t destCapacity,
|
|
const UChar *src, int32_t srcLength,
|
|
const char *locale,
|
|
UErrorCode *pErrorCode);
|
|
|
|
#if !UCONFIG_NO_BREAK_ITERATION
|
|
|
|
/**
|
|
* Titlecase a string.
|
|
* Casing is locale-dependent and context-sensitive.
|
|
* Titlecasing uses a break iterator to find the first characters of words
|
|
* that are to be titlecased. It titlecases those characters and lowercases
|
|
* all others.
|
|
*
|
|
* The titlecase break iterator can be provided to customize for arbitrary
|
|
* styles, using rules and dictionaries beyond the standard iterators.
|
|
* It may be more efficient to always provide an iterator to avoid
|
|
* opening and closing one for each string.
|
|
* The standard titlecase iterator for the root locale implements the
|
|
* algorithm of Unicode TR 21.
|
|
*
|
|
* This function uses only the setText(), first() and next() methods of the
|
|
* provided break iterator.
|
|
*
|
|
* The result may be longer or shorter than the original.
|
|
* The source string and the destination buffer are allowed to overlap.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the result
|
|
* without writing any of the result string.
|
|
* @param src The original string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param titleIter A break iterator to find the first characters of words
|
|
* that are to be titlecased.
|
|
* If none is provided (NULL), then a standard titlecase
|
|
* break iterator is opened.
|
|
* @param locale The locale to consider, or "" for the root locale or NULL for the default locale.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The length of the result string. It may be greater than destCapacity. In that case,
|
|
* only some of the result was written to the destination buffer.
|
|
* @stable ICU 2.1
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strToTitle(UChar *dest, int32_t destCapacity,
|
|
const UChar *src, int32_t srcLength,
|
|
UBreakIterator *titleIter,
|
|
const char *locale,
|
|
UErrorCode *pErrorCode);
|
|
|
|
#endif
|
|
|
|
/**
|
|
* Case-fold the characters in a string.
|
|
* Case-folding is locale-independent and not context-sensitive,
|
|
* but there is an option for whether to include or exclude mappings for dotted I
|
|
* and dotless i that are marked with 'I' in CaseFolding.txt.
|
|
* The result may be longer or shorter than the original.
|
|
* The source string and the destination buffer are allowed to overlap.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the result
|
|
* without writing any of the result string.
|
|
* @param src The original string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param options Either U_FOLD_CASE_DEFAULT or U_FOLD_CASE_EXCLUDE_SPECIAL_I
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The length of the result string. It may be greater than destCapacity. In that case,
|
|
* only some of the result was written to the destination buffer.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE int32_t U_EXPORT2
|
|
u_strFoldCase(UChar *dest, int32_t destCapacity,
|
|
const UChar *src, int32_t srcLength,
|
|
uint32_t options,
|
|
UErrorCode *pErrorCode);
|
|
|
|
#if defined(U_WCHAR_IS_UTF16) || defined(U_WCHAR_IS_UTF32) || !UCONFIG_NO_CONVERSION
|
|
/**
|
|
* Convert a UTF-16 string to a wchar_t string.
|
|
* If it is known at compile time that wchar_t strings are in UTF-16 or UTF-32, then
|
|
* this function simply calls the fast, dedicated function for that.
|
|
* Otherwise, two conversions UTF-16 -> default charset -> wchar_t* are performed.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of wchar_t's). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The pointer to destination buffer.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE wchar_t* U_EXPORT2
|
|
u_strToWCS(wchar_t *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode);
|
|
/**
|
|
* Convert a wchar_t string to UTF-16.
|
|
* If it is known at compile time that wchar_t strings are in UTF-16 or UTF-32, then
|
|
* this function simply calls the fast, dedicated function for that.
|
|
* Otherwise, two conversions wchar_t* -> default charset -> UTF-16 are performed.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The pointer to destination buffer.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_strFromWCS(UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const wchar_t *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode);
|
|
#endif /* defined(U_WCHAR_IS_UTF16) || defined(U_WCHAR_IS_UTF32) || !UCONFIG_NO_CONVERSION */
|
|
|
|
/**
|
|
* Convert a UTF-16 string to UTF-8.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of chars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The pointer to destination buffer.
|
|
* @stable ICU 2.0
|
|
* @see u_strToUTF8WithSub
|
|
* @see u_strFromUTF8
|
|
*/
|
|
U_STABLE char* U_EXPORT2
|
|
u_strToUTF8(char *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-8 string to UTF-16.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The pointer to destination buffer.
|
|
* @stable ICU 2.0
|
|
* @see u_strFromUTF8WithSub
|
|
* @see u_strFromUTF8Lenient
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_strFromUTF8(UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const char *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-16 string to UTF-8.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* Same as u_strToUTF8() except for the additional subchar which is output for
|
|
* illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
|
|
* With subchar==U_SENTINEL, this function behaves exactly like u_strToUTF8().
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of chars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param subchar The substitution character to use in place of an illegal input sequence,
|
|
* or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
|
|
* A substitution character can be any valid Unicode code point (up to U+10FFFF)
|
|
* except for surrogate code points (U+D800..U+DFFF).
|
|
* The recommended value is U+FFFD "REPLACEMENT CHARACTER".
|
|
* @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
|
|
* Set to 0 if no substitutions occur or subchar<0.
|
|
* pNumSubstitutions can be NULL.
|
|
* @param pErrorCode Pointer to a standard ICU error code. Its input value must
|
|
* pass the U_SUCCESS() test, or else the function returns
|
|
* immediately. Check for U_FAILURE() on output or use with
|
|
* function chaining. (See User Guide for details.)
|
|
* @return The pointer to destination buffer.
|
|
* @see u_strToUTF8
|
|
* @see u_strFromUTF8WithSub
|
|
* @stable ICU 3.6
|
|
*/
|
|
U_STABLE char* U_EXPORT2
|
|
u_strToUTF8WithSub(char *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar *src,
|
|
int32_t srcLength,
|
|
UChar32 subchar, int32_t *pNumSubstitutions,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-8 string to UTF-16.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* Same as u_strFromUTF8() except for the additional subchar which is output for
|
|
* illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
|
|
* With subchar==U_SENTINEL, this function behaves exactly like u_strFromUTF8().
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param subchar The substitution character to use in place of an illegal input sequence,
|
|
* or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
|
|
* A substitution character can be any valid Unicode code point (up to U+10FFFF)
|
|
* except for surrogate code points (U+D800..U+DFFF).
|
|
* The recommended value is U+FFFD "REPLACEMENT CHARACTER".
|
|
* @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
|
|
* Set to 0 if no substitutions occur or subchar<0.
|
|
* pNumSubstitutions can be NULL.
|
|
* @param pErrorCode Pointer to a standard ICU error code. Its input value must
|
|
* pass the U_SUCCESS() test, or else the function returns
|
|
* immediately. Check for U_FAILURE() on output or use with
|
|
* function chaining. (See User Guide for details.)
|
|
* @return The pointer to destination buffer.
|
|
* @see u_strFromUTF8
|
|
* @see u_strFromUTF8Lenient
|
|
* @see u_strToUTF8WithSub
|
|
* @stable ICU 3.6
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_strFromUTF8WithSub(UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const char *src,
|
|
int32_t srcLength,
|
|
UChar32 subchar, int32_t *pNumSubstitutions,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-8 string to UTF-16.
|
|
*
|
|
* Same as u_strFromUTF8() except that this function is designed to be very fast,
|
|
* which it achieves by being lenient about malformed UTF-8 sequences.
|
|
* This function is intended for use in environments where UTF-8 text is
|
|
* expected to be well-formed.
|
|
*
|
|
* Its semantics are:
|
|
* - Well-formed UTF-8 text is correctly converted to well-formed UTF-16 text.
|
|
* - The function will not read beyond the input string, nor write beyond
|
|
* the destCapacity.
|
|
* - Malformed UTF-8 results in "garbage" 16-bit Unicode strings which may not
|
|
* be well-formed UTF-16.
|
|
* The function will resynchronize to valid code point boundaries
|
|
* within a small number of code points after an illegal sequence.
|
|
* - Non-shortest forms are not detected and will result in "spoofing" output.
|
|
*
|
|
* For further performance improvement, if srcLength is given (>=0),
|
|
* then it must be destCapacity>=srcLength.
|
|
*
|
|
* There is no inverse u_strToUTF8Lenient() function because there is practically
|
|
* no performance gain from not checking that a UTF-16 string is well-formed.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* Unlike for other ICU functions, if srcLength>=0 then it
|
|
* must be destCapacity>=srcLength.
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* Unlike for other ICU functions, if srcLength>=0 but
|
|
* destCapacity<srcLength, then *pDestLength will be set to srcLength
|
|
* (and U_BUFFER_OVERFLOW_ERROR will be set)
|
|
* regardless of the actual result length.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param pErrorCode Pointer to a standard ICU error code. Its input value must
|
|
* pass the U_SUCCESS() test, or else the function returns
|
|
* immediately. Check for U_FAILURE() on output or use with
|
|
* function chaining. (See User Guide for details.)
|
|
* @return The pointer to destination buffer.
|
|
* @see u_strFromUTF8
|
|
* @see u_strFromUTF8WithSub
|
|
* @see u_strToUTF8WithSub
|
|
* @stable ICU 3.6
|
|
*/
|
|
U_STABLE UChar * U_EXPORT2
|
|
u_strFromUTF8Lenient(UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const char *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-16 string to UTF-32.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChar32s). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The pointer to destination buffer.
|
|
* @see u_strToUTF32WithSub
|
|
* @see u_strFromUTF32
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar32* U_EXPORT2
|
|
u_strToUTF32(UChar32 *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-32 string to UTF-16.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param pErrorCode Must be a valid pointer to an error code value,
|
|
* which must not indicate a failure before the function call.
|
|
* @return The pointer to destination buffer.
|
|
* @see u_strFromUTF32WithSub
|
|
* @see u_strToUTF32
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_STABLE UChar* U_EXPORT2
|
|
u_strFromUTF32(UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar32 *src,
|
|
int32_t srcLength,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-16 string to UTF-32.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* Same as u_strToUTF32() except for the additional subchar which is output for
|
|
* illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
|
|
* With subchar==U_SENTINEL, this function behaves exactly like u_strToUTF32().
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChar32s). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param subchar The substitution character to use in place of an illegal input sequence,
|
|
* or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
|
|
* A substitution character can be any valid Unicode code point (up to U+10FFFF)
|
|
* except for surrogate code points (U+D800..U+DFFF).
|
|
* The recommended value is U+FFFD "REPLACEMENT CHARACTER".
|
|
* @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
|
|
* Set to 0 if no substitutions occur or subchar<0.
|
|
* pNumSubstitutions can be NULL.
|
|
* @param pErrorCode Pointer to a standard ICU error code. Its input value must
|
|
* pass the U_SUCCESS() test, or else the function returns
|
|
* immediately. Check for U_FAILURE() on output or use with
|
|
* function chaining. (See User Guide for details.)
|
|
* @return The pointer to destination buffer.
|
|
* @see u_strToUTF32
|
|
* @see u_strFromUTF32WithSub
|
|
* @draft ICU 4.2
|
|
*/
|
|
U_DRAFT UChar32* U_EXPORT2
|
|
u_strToUTF32WithSub(UChar32 *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar *src,
|
|
int32_t srcLength,
|
|
UChar32 subchar, int32_t *pNumSubstitutions,
|
|
UErrorCode *pErrorCode);
|
|
|
|
/**
|
|
* Convert a UTF-32 string to UTF-16.
|
|
* If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
|
|
*
|
|
* Same as u_strFromUTF32() except for the additional subchar which is output for
|
|
* illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
|
|
* With subchar==U_SENTINEL, this function behaves exactly like u_strFromUTF32().
|
|
*
|
|
* @param dest A buffer for the result string. The result will be zero-terminated if
|
|
* the buffer is large enough.
|
|
* @param destCapacity The size of the buffer (number of UChars). If it is 0, then
|
|
* dest may be NULL and the function will only return the length of the
|
|
* result without writing any of the result string (pre-flighting).
|
|
* @param pDestLength A pointer to receive the number of units written to the destination. If
|
|
* pDestLength!=NULL then *pDestLength is always set to the
|
|
* number of output units corresponding to the transformation of
|
|
* all the input units, even in case of a buffer overflow.
|
|
* @param src The original source string
|
|
* @param srcLength The length of the original string. If -1, then src must be zero-terminated.
|
|
* @param subchar The substitution character to use in place of an illegal input sequence,
|
|
* or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
|
|
* A substitution character can be any valid Unicode code point (up to U+10FFFF)
|
|
* except for surrogate code points (U+D800..U+DFFF).
|
|
* The recommended value is U+FFFD "REPLACEMENT CHARACTER".
|
|
* @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
|
|
* Set to 0 if no substitutions occur or subchar<0.
|
|
* pNumSubstitutions can be NULL.
|
|
* @param pErrorCode Pointer to a standard ICU error code. Its input value must
|
|
* pass the U_SUCCESS() test, or else the function returns
|
|
* immediately. Check for U_FAILURE() on output or use with
|
|
* function chaining. (See User Guide for details.)
|
|
* @return The pointer to destination buffer.
|
|
* @see u_strFromUTF32
|
|
* @see u_strToUTF32WithSub
|
|
* @draft ICU 4.2
|
|
*/
|
|
U_DRAFT UChar* U_EXPORT2
|
|
u_strFromUTF32WithSub(UChar *dest,
|
|
int32_t destCapacity,
|
|
int32_t *pDestLength,
|
|
const UChar32 *src,
|
|
int32_t srcLength,
|
|
UChar32 subchar, int32_t *pNumSubstitutions,
|
|
UErrorCode *pErrorCode);
|
|
|
|
#endif
|