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