forked from mirrors/gecko-dev
160 lines
6.2 KiB
C++
160 lines
6.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsUnicharUtils_h__
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#define nsUnicharUtils_h__
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#include "nsString.h"
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/* (0x3131u <= (u) && (u) <= 0x318eu) => Hangul Compatibility Jamo */
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/* (0xac00u <= (u) && (u) <= 0xd7a3u) => Hangul Syllables */
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#define IS_CJ_CHAR(u) \
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((0x2e80u <= (u) && (u) <= 0x312fu) || (0x3190u <= (u) && (u) <= 0xabffu) || \
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(0xf900u <= (u) && (u) <= 0xfaffu) || (0xff00u <= (u) && (u) <= 0xffefu))
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#define IS_ZERO_WIDTH_SPACE(u) ((u) == 0x200B)
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#define IS_ASCII(u) ((u) < 0x80)
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#define IS_ASCII_UPPER(u) (('A' <= (u)) && ((u) <= 'Z'))
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#define IS_ASCII_LOWER(u) (('a' <= (u)) && ((u) <= 'z'))
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#define IS_ASCII_ALPHA(u) (IS_ASCII_UPPER(u) || IS_ASCII_LOWER(u))
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#define IS_ASCII_SPACE(u) (' ' == (u))
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void ToLowerCase(nsAString& aString);
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void ToLowerCaseASCII(nsAString& aString);
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void ToUpperCase(nsAString& aString);
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void ToLowerCase(const nsAString& aSource, nsAString& aDest);
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void ToLowerCaseASCII(const nsAString& aSource, nsAString& aDest);
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void ToUpperCase(const nsAString& aSource, nsAString& aDest);
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uint32_t ToLowerCase(uint32_t aChar);
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uint32_t ToUpperCase(uint32_t aChar);
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uint32_t ToTitleCase(uint32_t aChar);
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void ToLowerCase(const char16_t* aIn, char16_t* aOut, size_t aLen);
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void ToLowerCaseASCII(const char16_t* aIn, char16_t* aOut, size_t aLen);
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void ToUpperCase(const char16_t* aIn, char16_t* aOut, size_t aLen);
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char ToLowerCaseASCII(const char aChar);
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char16_t ToLowerCaseASCII(const char16_t aChar);
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char32_t ToLowerCaseASCII(const char32_t aChar);
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char ToUpperCaseASCII(const char aChar);
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char16_t ToUpperCaseASCII(const char16_t aChar);
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char32_t ToUpperCaseASCII(const char32_t aChar);
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inline bool IsUpperCase(uint32_t c) { return ToLowerCase(c) != c; }
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inline bool IsLowerCase(uint32_t c) { return ToUpperCase(c) != c; }
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#ifdef MOZILLA_INTERNAL_API
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uint32_t ToFoldedCase(uint32_t aChar);
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void ToFoldedCase(nsAString& aString);
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void ToFoldedCase(const char16_t* aIn, char16_t* aOut, size_t aLen);
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uint32_t ToNaked(uint32_t aChar);
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void ToNaked(nsAString& aString);
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int32_t nsCaseInsensitiveStringComparator(const char16_t*, const char16_t*,
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size_t, size_t);
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int32_t nsCaseInsensitiveUTF8StringComparator(const char*, const char*, size_t,
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size_t);
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class nsCaseInsensitiveStringArrayComparator {
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public:
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template <class A, class B>
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bool Equals(const A& a, const B& b) const {
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return a.Equals(b, nsCaseInsensitiveStringComparator);
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}
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};
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int32_t nsASCIICaseInsensitiveStringComparator(const char16_t*, const char16_t*,
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size_t, size_t);
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inline bool CaseInsensitiveFindInReadable(
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const nsAString& aPattern, nsAString::const_iterator& aSearchStart,
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nsAString::const_iterator& aSearchEnd) {
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return FindInReadable(aPattern, aSearchStart, aSearchEnd,
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nsCaseInsensitiveStringComparator);
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}
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inline bool CaseInsensitiveFindInReadable(const nsAString& aPattern,
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const nsAString& aHay) {
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nsAString::const_iterator searchBegin, searchEnd;
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return FindInReadable(aPattern, aHay.BeginReading(searchBegin),
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aHay.EndReading(searchEnd),
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nsCaseInsensitiveStringComparator);
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}
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#endif // MOZILLA_INTERNAL_API
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int32_t CaseInsensitiveCompare(const char16_t* a, const char16_t* b,
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size_t len);
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int32_t CaseInsensitiveCompare(const char* aLeft, const char* aRight,
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size_t aLeftBytes, size_t aRightBytes);
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/**
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* Calculates the lower-case of the codepoint of the UTF8 sequence starting at
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* aStr. Sets aNext to the byte following the end of the sequence.
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*
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* If the sequence is invalid, or if computing the codepoint would take us off
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* the end of the string (as marked by aEnd), returns -1 and does not set
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* aNext. Note that this function doesn't check that aStr < aEnd -- it assumes
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* you've done that already.
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*/
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uint32_t GetLowerUTF8Codepoint(const char* aStr, const char* aEnd,
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const char** aNext);
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/**
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* This function determines whether the UTF-8 sequence pointed to by aLeft is
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* case insensitively equal to the UTF-8 sequence pointed to by aRight (or
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* optionally, case and diacritic insensitively equal), as defined by having
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* matching (naked) lower-cased codepoints.
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*
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* aLeftEnd marks the first memory location past aLeft that is not part of
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* aLeft; aRightEnd similarly marks the end of aRight.
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*
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* The function assumes that aLeft < aLeftEnd and aRight < aRightEnd.
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*
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* The function stores the addresses of the next characters in the sequence
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* into aLeftNext and aRightNext. It's up to the caller to make sure that the
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* returned pointers are valid -- i.e. the function may return aLeftNext >=
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* aLeftEnd or aRightNext >= aRightEnd.
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*
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* If the function encounters invalid text, it sets aErr to true and returns
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* false, possibly leaving aLeftNext and aRightNext uninitialized. If the
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* function returns true, aErr is guaranteed to be false and both aLeftNext and
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* aRightNext are guaranteed to be initialized.
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*
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* If aMatchDiacritics is false, the comparison is neither case-sensitive nor
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* diacritic-sensitive.
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*/
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bool CaseInsensitiveUTF8CharsEqual(const char* aLeft, const char* aRight,
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const char* aLeftEnd, const char* aRightEnd,
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const char** aLeftNext,
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const char** aRightNext, bool* aErr,
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bool aMatchDiacritics = true);
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namespace mozilla {
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/**
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* Hash a UTF8 string as though it were a UTF16 string.
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*
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* The value returned is the same as if we converted the string to UTF16 and
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* then ran HashString() on the result.
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*
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* The given |length| is in bytes.
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*/
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uint32_t HashUTF8AsUTF16(const char* aUTF8, size_t aLength, bool* aErr);
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bool IsSegmentBreakSkipChar(uint32_t u);
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} // namespace mozilla
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#endif /* nsUnicharUtils_h__ */
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