119 lines
4.8 KiB
C++
119 lines
4.8 KiB
C++
/*
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**********************************************************************
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* Copyright (c) 2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Date Name Description
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* 11/19/2001 aliu Creation.
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**********************************************************************
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*/
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#ifndef ICU_UTIL_H
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#define ICU_UTIL_H
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#include "unicode/utypes.h"
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#include "unicode/unistr.h"
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//--------------------------------------------------------------------
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// class ICU_Utility
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// i18n utility functions, scoped into the class ICU_Utility.
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//--------------------------------------------------------------------
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U_NAMESPACE_BEGIN
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class ICU_Utility {
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public:
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/**
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* Append a number to the given UnicodeString in the given radix.
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* Standard digits '0'-'9' are used and letters 'A'-'Z' for
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* radices 11 through 36.
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* @param result the digits of the number are appended here
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* @param n the number to be converted to digits; may be negative.
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* If negative, a '-' is prepended to the digits.
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* @param radix a radix from 2 to 36 inclusive.
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* @param minDigits the minimum number of digits, not including
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* any '-', to produce. Values less than 2 have no effect. One
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* digit is always emitted regardless of this parameter.
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* @return a reference to result
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*/
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static UnicodeString& appendNumber(UnicodeString& result, int32_t n,
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int32_t radix = 10,
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int32_t minDigits = 1);
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/**
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* Return true if the character is NOT printable ASCII.
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*
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* This method should really be in UnicodeString (or similar). For
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* now, we implement it here and share it with friend classes.
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*/
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static UBool isUnprintable(UChar32 c);
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/**
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* Escape unprintable characters using \uxxxx notation for U+0000 to
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* U+FFFF and \Uxxxxxxxx for U+10000 and above. If the character is
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* printable ASCII, then do nothing and return FALSE. Otherwise,
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* append the escaped notation and return TRUE.
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*/
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static UBool escapeUnprintable(UnicodeString& result, UChar32 c);
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/**
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* Returns the index of a character, ignoring quoted text.
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* For example, in the string "abc'hide'h", the 'h' in "hide" will not be
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* found by a search for 'h'.
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* @param text text to be searched
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* @param start the beginning index, inclusive; <code>0 <= start
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* <= limit</code>.
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* @param limit the ending index, exclusive; <code>start <= limit
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* <= text.length()</code>.
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* @param c character to search for
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* @return Offset of the first instance of c, or -1 if not found.
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*/
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static int32_t quotedIndexOf(const UnicodeString& text,
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int32_t start, int32_t limit,
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UChar c);
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/**
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* Skip over a sequence of zero or more white space characters
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* at pos. Return the index of the first non-white-space character
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* at or after pos, or str.length(), if there is none.
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*/
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static int32_t skipWhitespace(const UnicodeString& str, int32_t pos);
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/**
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* Parse a pattern string starting at offset pos. Keywords are
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* matched case-insensitively. Spaces may be skipped and may be
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* optional or required. Integer values may be parsed, and if
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* they are, they will be returned in the given array. If
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* successful, the offset of the next non-space character is
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* returned. On failure, -1 is returned.
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* @param pattern must only contain lowercase characters, which
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* will match their uppercase equivalents as well. A space
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* character matches one or more required spaces. A '~' character
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* matches zero or more optional spaces. A '#' character matches
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* an integer and stores it in parsedInts, which the caller must
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* ensure has enough capacity.
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* @param parsedInts array to receive parsed integers. Caller
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* must ensure that parsedInts.length is >= the number of '#'
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* signs in 'pattern'.
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* @return the position after the last character parsed, or -1 if
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* the parse failed
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*/
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static int32_t parsePattern(const UnicodeString& rule, int32_t pos, int32_t limit,
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const UnicodeString& pattern, int32_t* parsedInts);
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/**
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* Parse an integer at pos, either of the form \d+ or of the form
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* 0x[0-9A-Fa-f]+ or 0[0-7]+, that is, in standard decimal, hex,
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* or octal format.
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* @param pos INPUT-OUTPUT parameter. On input, the first
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* character to parse. On output, the character after the last
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* parsed character.
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*/
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static int32_t parseInteger(const UnicodeString& rule, int32_t& pos, int32_t limit);
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};
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U_NAMESPACE_END
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#endif
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//eof
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