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gecko/xpcom/glue/nsStringAPI.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/**
* This header provides wrapper classes around the frozen string API
* which are roughly equivalent to the internal string classes.
*/
#ifdef MOZILLA_INTERNAL_API
#error nsStringAPI.h is only usable from non-MOZILLA_INTERNAL_API code!
#endif
#ifndef nsStringAPI_h__
#define nsStringAPI_h__
#include "mozilla/Attributes.h"
#include "mozilla/Char16.h"
#include "nsXPCOMStrings.h"
#include "nsISupportsImpl.h"
#include "prlog.h"
#include "nsTArray.h"
/**
* Comparison function for use with nsACString::Equals
*/
NS_HIDDEN_(int32_t) CaseInsensitiveCompare(const char* aStrA, const char* aStrB,
uint32_t aLength);
class nsAString
{
public:
typedef char16_t char_type;
typedef nsAString self_type;
typedef uint32_t size_type;
typedef uint32_t index_type;
/**
* Returns the length, beginning, and end of a string in one operation.
*/
NS_HIDDEN_(uint32_t) BeginReading(const char_type** aBegin,
const char_type** aEnd = nullptr) const;
NS_HIDDEN_(const char_type*) BeginReading() const;
NS_HIDDEN_(const char_type*) EndReading() const;
NS_HIDDEN_(char_type) CharAt(uint32_t aPos) const
{
NS_ASSERTION(aPos < Length(), "Out of bounds");
return BeginReading()[aPos];
}
NS_HIDDEN_(char_type) operator [](uint32_t aPos) const
{
return CharAt(aPos);
}
NS_HIDDEN_(char_type) First() const
{
return CharAt(0);
}
NS_HIDDEN_(char_type) Last() const
{
const char_type* data;
uint32_t dataLen = NS_StringGetData(*this, &data);
return data[dataLen - 1];
}
/**
* Get the length, begin writing, and optionally set the length of a
* string all in one operation.
*
* @param newSize Size the string to this length. Pass UINT32_MAX
* to leave the length unchanged.
* @return The new length of the string, or 0 if resizing failed.
*/
NS_HIDDEN_(uint32_t) BeginWriting(char_type** aBegin,
char_type** aEnd = nullptr,
uint32_t aNewSize = UINT32_MAX);
NS_HIDDEN_(char_type*) BeginWriting(uint32_t = UINT32_MAX);
NS_HIDDEN_(char_type*) EndWriting();
NS_HIDDEN_(bool) SetLength(uint32_t aLen);
NS_HIDDEN_(size_type) Length() const
{
const char_type* data;
return NS_StringGetData(*this, &data);
}
NS_HIDDEN_(bool) IsEmpty() const { return Length() == 0; }
NS_HIDDEN_(void) SetIsVoid(bool aVal) { NS_StringSetIsVoid(*this, aVal); }
NS_HIDDEN_(bool) IsVoid() const { return NS_StringGetIsVoid(*this); }
NS_HIDDEN_(void) Assign(const self_type& aString)
{
NS_StringCopy(*this, aString);
}
NS_HIDDEN_(void) Assign(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_StringSetData(*this, aData, aLength);
}
NS_HIDDEN_(void) Assign(char_type aChar)
{
NS_StringSetData(*this, &aChar, 1);
}
#ifdef MOZ_USE_CHAR16_WRAPPER
NS_HIDDEN_(void) Assign(char16ptr_t aData, size_type aLength = UINT32_MAX)
{
NS_StringSetData(*this, aData, aLength);
}
#endif
NS_HIDDEN_(void) AssignLiteral(const char* aStr);
NS_HIDDEN_(void) AssignASCII(const char* aStr)
{
AssignLiteral(aStr);
}
NS_HIDDEN_(self_type&) operator=(const self_type& aString)
{
Assign(aString);
return *this;
}
NS_HIDDEN_(self_type&) operator=(const char_type* aPtr)
{
Assign(aPtr);
return *this;
}
NS_HIDDEN_(self_type&) operator=(char_type aChar)
{
Assign(aChar);
return *this;
}
#ifdef MOZ_USE_CHAR16_WRAPPER
NS_HIDDEN_(self_type&) operator=(char16ptr_t aPtr)
{
Assign(aPtr);
return *this;
}
#endif
NS_HIDDEN_(void) Replace(index_type aCutStart, size_type aCutLength,
const char_type* aData,
size_type aLength = size_type(-1))
{
NS_StringSetDataRange(*this, aCutStart, aCutLength, aData, aLength);
}
NS_HIDDEN_(void) Replace(index_type aCutStart, size_type aCutLength,
char_type aChar)
{
Replace(aCutStart, aCutLength, &aChar, 1);
}
NS_HIDDEN_(void) Replace(index_type aCutStart, size_type aCutLength,
const self_type& aReadable)
{
const char_type* data;
uint32_t dataLen = NS_StringGetData(aReadable, &data);
NS_StringSetDataRange(*this, aCutStart, aCutLength, data, dataLen);
}
NS_HIDDEN_(void) SetCharAt(char_type aChar, index_type aPos)
{
Replace(aPos, 1, &aChar, 1);
}
NS_HIDDEN_(void) Append(char_type aChar)
{
Replace(size_type(-1), 0, aChar);
}
NS_HIDDEN_(void) Append(const char_type* aData,
size_type aLength = size_type(-1))
{
Replace(size_type(-1), 0, aData, aLength);
}
#ifdef MOZ_USE_CHAR16_WRAPPER
NS_HIDDEN_(void) Append(char16ptr_t aData, size_type aLength = size_type(-1))
{
Append(static_cast<const char16_t*>(aData), aLength);
}
#endif
NS_HIDDEN_(void) Append(const self_type& aReadable)
{
Replace(size_type(-1), 0, aReadable);
}
NS_HIDDEN_(void) AppendLiteral(const char* aASCIIStr);
NS_HIDDEN_(void) AppendASCII(const char* aASCIIStr)
{
AppendLiteral(aASCIIStr);
}
NS_HIDDEN_(self_type&) operator+=(char_type aChar)
{
Append(aChar);
return *this;
}
NS_HIDDEN_(self_type&) operator+=(const char_type* aData)
{
Append(aData);
return *this;
}
NS_HIDDEN_(self_type&) operator+=(const self_type& aReadable)
{
Append(aReadable);
return *this;
}
NS_HIDDEN_(void) Insert(char_type aChar, index_type aPos)
{
Replace(aPos, 0, aChar);
}
NS_HIDDEN_(void) Insert(const char_type* aData, index_type aPos,
size_type aLength = size_type(-1))
{
Replace(aPos, 0, aData, aLength);
}
NS_HIDDEN_(void) Insert(const self_type& aReadable, index_type aPos)
{
Replace(aPos, 0, aReadable);
}
NS_HIDDEN_(void) Cut(index_type aCutStart, size_type aCutLength)
{
Replace(aCutStart, aCutLength, nullptr, 0);
}
NS_HIDDEN_(void) Truncate() { SetLength(0); }
/**
* Remove all occurences of characters in aSet from the string.
*/
NS_HIDDEN_(void) StripChars(const char* aSet);
/**
* Strip whitespace characters from the string.
*/
NS_HIDDEN_(void) StripWhitespace() { StripChars("\b\t\r\n "); }
NS_HIDDEN_(void) Trim(const char* aSet, bool aLeading = true,
bool aTrailing = true);
/**
* Compare strings of characters. Return 0 if the characters are equal,
*/
typedef int32_t (*ComparatorFunc)(const char_type* aStrA,
const char_type* aStrB,
uint32_t aLength);
static NS_HIDDEN_(int32_t) DefaultComparator(const char_type* aStrA,
const char_type* aStrB,
uint32_t aLength);
NS_HIDDEN_(int32_t) Compare(const char_type* aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(int32_t) Compare(const self_type& aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(bool) Equals(const char_type* aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(bool) Equals(const self_type& aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(bool) operator<(const self_type& aOther) const
{
return Compare(aOther) < 0;
}
NS_HIDDEN_(bool) operator<(const char_type* aOther) const
{
return Compare(aOther) < 0;
}
NS_HIDDEN_(bool) operator<=(const self_type& aOther) const
{
return Compare(aOther) <= 0;
}
NS_HIDDEN_(bool) operator<=(const char_type* aOther) const
{
return Compare(aOther) <= 0;
}
NS_HIDDEN_(bool) operator==(const self_type& aOther) const
{
return Equals(aOther);
}
NS_HIDDEN_(bool) operator==(const char_type* aOther) const
{
return Equals(aOther);
}
#ifdef MOZ_USE_CHAR16_WRAPPER
NS_HIDDEN_(bool) operator==(char16ptr_t aOther) const
{
return Equals(aOther);
}
#endif
NS_HIDDEN_(bool) operator>=(const self_type& aOther) const
{
return Compare(aOther) >= 0;
}
NS_HIDDEN_(bool) operator>=(const char_type* aOther) const
{
return Compare(aOther) >= 0;
}
NS_HIDDEN_(bool) operator>(const self_type& aOther) const
{
return Compare(aOther) > 0;
}
NS_HIDDEN_(bool) operator>(const char_type* aOther) const
{
return Compare(aOther) > 0;
}
NS_HIDDEN_(bool) operator!=(const self_type& aOther) const
{
return !Equals(aOther);
}
NS_HIDDEN_(bool) operator!=(const char_type* aOther) const
{
return !Equals(aOther);
}
NS_HIDDEN_(bool) EqualsLiteral(const char* aASCIIString) const;
NS_HIDDEN_(bool) EqualsASCII(const char* aASCIIString) const
{
return EqualsLiteral(aASCIIString);
}
/**
* Case-insensitive match this string to a lowercase ASCII string.
*/
NS_HIDDEN_(bool) LowerCaseEqualsLiteral(const char* aASCIIString) const;
/**
* Find the first occurrence of aStr in this string.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(int32_t) Find(const self_type& aStr,
ComparatorFunc aComparator = DefaultComparator) const
{
return Find(aStr, 0, aComparator);
}
/**
* Find the first occurrence of aStr in this string, beginning at aOffset.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(int32_t) Find(const self_type& aStr, uint32_t aOffset,
ComparatorFunc aComparator = DefaultComparator) const;
/**
* Find an ASCII string within this string.
*
* @return the offset of aStr, or -1 if not found.
*/
NS_HIDDEN_(int32_t) Find(const char* aStr, bool aIgnoreCase = false) const
{
return Find(aStr, 0, aIgnoreCase);
}
NS_HIDDEN_(int32_t) Find(const char* aStr, uint32_t aOffset,
bool aIgnoreCase = false) const;
/**
* Find the last occurrence of aStr in this string.
*
* @return The offset of aStr from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const self_type& aStr,
ComparatorFunc aComparator = DefaultComparator) const
{
return RFind(aStr, -1, aComparator);
}
/**
* Find the last occurrence of aStr in this string, beginning at aOffset.
*
* @param aOffset the offset from the beginning of the string to begin
* searching. If aOffset < 0, search from end of this string.
* @return The offset of aStr from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const self_type& aStr, int32_t aOffset,
ComparatorFunc aComparator = DefaultComparator) const;
/**
* Find the last occurrence of an ASCII string within this string.
*
* @return The offset of aStr from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const char* aStr, bool aIgnoreCase = false) const
{
return RFind(aStr, -1, aIgnoreCase);
}
/**
* Find the last occurrence of an ASCII string beginning at aOffset.
*
* @param aOffset the offset from the beginning of the string to begin
* searching. If aOffset < 0, search from end of this string.
* @return The offset of aStr from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const char* aStr, int32_t aOffset,
bool aIgnoreCase) const;
/**
* Search for the offset of the first occurrence of a character in a
* string.
*
* @param aOffset the offset from the beginning of the string to begin
* searching
* @return The offset of the character from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) FindChar(char_type aChar, uint32_t aOffset = 0) const;
/**
* Search for the offset of the last occurrence of a character in a
* string.
*
* @return The offset of the character from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFindChar(char_type aChar) const;
/**
* Append a string representation of a number.
*/
NS_HIDDEN_(void) AppendInt(int aInt, int32_t aRadix = 10);
#ifndef XPCOM_GLUE_AVOID_NSPR
/**
* Convert this string to an integer.
*
* @param aErrorCode pointer to contain result code.
* @param aRadix must be 10 or 16
*/
NS_HIDDEN_(int32_t) ToInteger(nsresult* aErrorCode,
uint32_t aRadix = 10) const;
/**
* Convert this string to a 64-bit integer.
*
* @param aErrorCode pointer to contain result code.
* @param aRadix must be 10 or 16
*/
NS_HIDDEN_(int64_t) ToInteger64(nsresult* aErrorCode,
uint32_t aRadix = 10) const;
#endif // XPCOM_GLUE_AVOID_NSPR
protected:
// Prevent people from allocating a nsAString directly.
~nsAString() {}
};
class nsACString
{
public:
typedef char char_type;
typedef nsACString self_type;
typedef uint32_t size_type;
typedef uint32_t index_type;
/**
* Returns the length, beginning, and end of a string in one operation.
*/
NS_HIDDEN_(uint32_t) BeginReading(const char_type** aBegin,
const char_type** aEnd = nullptr) const;
NS_HIDDEN_(const char_type*) BeginReading() const;
NS_HIDDEN_(const char_type*) EndReading() const;
NS_HIDDEN_(char_type) CharAt(uint32_t aPos) const
{
NS_ASSERTION(aPos < Length(), "Out of bounds");
return BeginReading()[aPos];
}
NS_HIDDEN_(char_type) operator [](uint32_t aPos) const
{
return CharAt(aPos);
}
NS_HIDDEN_(char_type) First() const
{
return CharAt(0);
}
NS_HIDDEN_(char_type) Last() const
{
const char_type* data;
uint32_t dataLen = NS_CStringGetData(*this, &data);
return data[dataLen - 1];
}
/**
* Get the length, begin writing, and optionally set the length of a
* string all in one operation.
*
* @param newSize Size the string to this length. Pass UINT32_MAX
* to leave the length unchanged.
* @return The new length of the string, or 0 if resizing failed.
*/
NS_HIDDEN_(uint32_t) BeginWriting(char_type** aBegin,
char_type** aEnd = nullptr,
uint32_t aNewSize = UINT32_MAX);
NS_HIDDEN_(char_type*) BeginWriting(uint32_t aLen = UINT32_MAX);
NS_HIDDEN_(char_type*) EndWriting();
NS_HIDDEN_(bool) SetLength(uint32_t aLen);
NS_HIDDEN_(size_type) Length() const
{
const char_type* data;
return NS_CStringGetData(*this, &data);
}
NS_HIDDEN_(bool) IsEmpty() const { return Length() == 0; }
NS_HIDDEN_(void) SetIsVoid(bool aVal) { NS_CStringSetIsVoid(*this, aVal); }
NS_HIDDEN_(bool) IsVoid() const { return NS_CStringGetIsVoid(*this); }
NS_HIDDEN_(void) Assign(const self_type& aString)
{
NS_CStringCopy(*this, aString);
}
NS_HIDDEN_(void) Assign(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_CStringSetData(*this, aData, aLength);
}
NS_HIDDEN_(void) Assign(char_type aChar)
{
NS_CStringSetData(*this, &aChar, 1);
}
NS_HIDDEN_(void) AssignLiteral(const char_type* aData)
{
Assign(aData);
}
NS_HIDDEN_(void) AssignASCII(const char_type* aData)
{
Assign(aData);
}
NS_HIDDEN_(self_type&) operator=(const self_type& aString)
{
Assign(aString);
return *this;
}
NS_HIDDEN_(self_type&) operator=(const char_type* aPtr)
{
Assign(aPtr);
return *this;
}
NS_HIDDEN_(self_type&) operator=(char_type aChar)
{
Assign(aChar);
return *this;
}
NS_HIDDEN_(void) Replace(index_type aCutStart, size_type aCutLength,
const char_type* aData,
size_type aLength = size_type(-1))
{
NS_CStringSetDataRange(*this, aCutStart, aCutLength, aData, aLength);
}
NS_HIDDEN_(void) Replace(index_type aCutStart, size_type aCutLength,
char_type aChar)
{
Replace(aCutStart, aCutLength, &aChar, 1);
}
NS_HIDDEN_(void) Replace(index_type aCutStart, size_type aCutLength,
const self_type& aReadable)
{
const char_type* data;
uint32_t dataLen = NS_CStringGetData(aReadable, &data);
NS_CStringSetDataRange(*this, aCutStart, aCutLength, data, dataLen);
}
NS_HIDDEN_(void) SetCharAt(char_type aChar, index_type aPos)
{
Replace(aPos, 1, &aChar, 1);
}
NS_HIDDEN_(void) Append(char_type aChar)
{
Replace(size_type(-1), 0, aChar);
}
NS_HIDDEN_(void) Append(const char_type* aData,
size_type aLength = size_type(-1))
{
Replace(size_type(-1), 0, aData, aLength);
}
NS_HIDDEN_(void) Append(const self_type& aReadable)
{
Replace(size_type(-1), 0, aReadable);
}
NS_HIDDEN_(void) AppendLiteral(const char* aASCIIStr)
{
Append(aASCIIStr);
}
NS_HIDDEN_(void) AppendASCII(const char* aASCIIStr)
{
Append(aASCIIStr);
}
NS_HIDDEN_(self_type&) operator+=(char_type aChar)
{
Append(aChar);
return *this;
}
NS_HIDDEN_(self_type&) operator+=(const char_type* aData)
{
Append(aData);
return *this;
}
NS_HIDDEN_(self_type&) operator+=(const self_type& aReadable)
{
Append(aReadable);
return *this;
}
NS_HIDDEN_(void) Insert(char_type aChar, index_type aPos)
{
Replace(aPos, 0, aChar);
}
NS_HIDDEN_(void) Insert(const char_type* aData, index_type aPos,
size_type aLength = size_type(-1))
{
Replace(aPos, 0, aData, aLength);
}
NS_HIDDEN_(void) Insert(const self_type& aReadable, index_type aPos)
{
Replace(aPos, 0, aReadable);
}
NS_HIDDEN_(void) Cut(index_type aCutStart, size_type aCutLength)
{
Replace(aCutStart, aCutLength, nullptr, 0);
}
NS_HIDDEN_(void) Truncate() { SetLength(0); }
/**
* Remove all occurences of characters in aSet from the string.
*/
NS_HIDDEN_(void) StripChars(const char* aSet);
/**
* Strip whitespace characters from the string.
*/
NS_HIDDEN_(void) StripWhitespace() { StripChars("\b\t\r\n "); }
NS_HIDDEN_(void) Trim(const char* aSet, bool aLeading = true,
bool aTrailing = true);
/**
* Compare strings of characters. Return 0 if the characters are equal,
*/
typedef int32_t (*ComparatorFunc)(const char_type* a,
const char_type* b,
uint32_t length);
static NS_HIDDEN_(int32_t) DefaultComparator(const char_type* aStrA,
const char_type* aStrB,
uint32_t aLength);
NS_HIDDEN_(int32_t) Compare(const char_type* aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(int32_t) Compare(const self_type& aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(bool) Equals(const char_type* aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(bool) Equals(const self_type& aOther,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(bool) operator<(const self_type& aOther) const
{
return Compare(aOther) < 0;
}
NS_HIDDEN_(bool) operator<(const char_type* aOther) const
{
return Compare(aOther) < 0;
}
NS_HIDDEN_(bool) operator<=(const self_type& aOther) const
{
return Compare(aOther) <= 0;
}
NS_HIDDEN_(bool) operator<=(const char_type* aOther) const
{
return Compare(aOther) <= 0;
}
NS_HIDDEN_(bool) operator==(const self_type& aOther) const
{
return Equals(aOther);
}
NS_HIDDEN_(bool) operator==(const char_type* aOther) const
{
return Equals(aOther);
}
NS_HIDDEN_(bool) operator>=(const self_type& aOther) const
{
return Compare(aOther) >= 0;
}
NS_HIDDEN_(bool) operator>=(const char_type* aOther) const
{
return Compare(aOther) >= 0;
}
NS_HIDDEN_(bool) operator>(const self_type& aOther) const
{
return Compare(aOther) > 0;
}
NS_HIDDEN_(bool) operator>(const char_type* aOther) const
{
return Compare(aOther) > 0;
}
NS_HIDDEN_(bool) operator!=(const self_type& aOther) const
{
return !Equals(aOther);
}
NS_HIDDEN_(bool) operator!=(const char_type* aOther) const
{
return !Equals(aOther);
}
NS_HIDDEN_(bool) EqualsLiteral(const char_type* aOther) const
{
return Equals(aOther);
}
NS_HIDDEN_(bool) EqualsASCII(const char_type* aOther) const
{
return Equals(aOther);
}
/**
* Case-insensitive match this string to a lowercase ASCII string.
*/
NS_HIDDEN_(bool) LowerCaseEqualsLiteral(const char* aASCIIString) const
{
return Equals(aASCIIString, CaseInsensitiveCompare);
}
/**
* Find the first occurrence of aStr in this string.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(int32_t) Find(const self_type& aStr,
ComparatorFunc aComparator = DefaultComparator) const
{
return Find(aStr, 0, aComparator);
}
/**
* Find the first occurrence of aStr in this string, beginning at aOffset.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(int32_t) Find(const self_type& aStr, uint32_t aOffset,
ComparatorFunc aComparator = DefaultComparator) const;
/**
* Find the first occurrence of aStr in this string.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(int32_t) Find(const char_type* aStr,
ComparatorFunc aComparator = DefaultComparator) const;
NS_HIDDEN_(int32_t) Find(const char_type* aStr, uint32_t aLen,
ComparatorFunc aComparator = DefaultComparator) const;
/**
* Find the last occurrence of aStr in this string.
*
* @return The offset of the character from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const self_type& aStr,
ComparatorFunc aComparator = DefaultComparator) const
{
return RFind(aStr, -1, aComparator);
}
/**
* Find the last occurrence of aStr in this string, beginning at aOffset.
*
* @param aOffset the offset from the beginning of the string to begin
* searching. If aOffset < 0, search from end of this string.
* @return The offset of aStr from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const self_type& aStr, int32_t aOffset,
ComparatorFunc aComparator = DefaultComparator) const;
/**
* Find the last occurrence of aStr in this string.
*
* @return The offset of aStr from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const char_type* aStr,
ComparatorFunc aComparator = DefaultComparator) const;
/**
* Find the last occurrence of an ASCII string in this string,
* beginning at aOffset.
*
* @param aLen is the length of aStr
* @return The offset of aStr from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFind(const char_type* aStr, int32_t aLen,
ComparatorFunc aComparator = DefaultComparator) const;
/**
* Search for the offset of the first occurrence of a character in a
* string.
*
* @param aOffset the offset from the beginning of the string to begin
* searching
* @return The offset of the character from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) FindChar(char_type aChar, uint32_t aOffset = 0) const;
/**
* Search for the offset of the last occurrence of a character in a
* string.
*
* @return The offset of the character from the beginning of the string,
* or -1 if not found.
*/
NS_HIDDEN_(int32_t) RFindChar(char_type aChar) const;
/**
* Append a string representation of a number.
*/
NS_HIDDEN_(void) AppendInt(int aInt, int32_t aRadix = 10);
#ifndef XPCOM_GLUE_AVOID_NSPR
/**
* Convert this string to an integer.
*
* @param aErrorCode pointer to contain result code.
* @param aRadix must be 10 or 16
*/
NS_HIDDEN_(int32_t) ToInteger(nsresult* aErrorCode,
uint32_t aRadix = 10) const;
/**
* Convert this string to a 64-bit integer.
*
* @param aErrorCode pointer to contain result code.
* @param aRadix must be 10 or 16
*/
NS_HIDDEN_(int64_t) ToInteger64(nsresult* aErrorCode,
uint32_t aRadix = 10) const;
#endif // XPCOM_GLUE_AVOID_NSPR
protected:
// Prevent people from allocating a nsAString directly.
~nsACString() {}
};
/* ------------------------------------------------------------------------- */
/**
* Below we define nsStringContainer and nsCStringContainer. These classes
* have unspecified structure. In most cases, your code should use
* nsString/nsCString instead of these classes; if you prefer C-style
* programming, then look no further.
*/
class nsStringContainer
: public nsAString
, private nsStringContainer_base
{
};
class nsCStringContainer
: public nsACString
, private nsStringContainer_base
{
};
/**
* The following classes are C++ helper classes that make the frozen string
* API easier to use.
*/
/**
* Rename symbols to avoid conflicting with internal versions.
*/
#define nsString nsString_external
#define nsCString nsCString_external
#define nsDependentString nsDependentString_external
#define nsDependentCString nsDependentCString_external
#define NS_ConvertASCIItoUTF16 NS_ConvertASCIItoUTF16_external
#define NS_ConvertUTF8toUTF16 NS_ConvertUTF8toUTF16_external
#define NS_ConvertUTF16toUTF8 NS_ConvertUTF16toUTF8_external
#define NS_LossyConvertUTF16toASCII NS_LossyConvertUTF16toASCII_external
#define nsGetterCopies nsGetterCopies_external
#define nsCGetterCopies nsCGetterCopies_external
#define nsDependentSubstring nsDependentSubstring_external
#define nsDependentCSubstring nsDependentCSubstring_external
/**
* basic strings
*/
class nsString : public nsStringContainer
{
public:
typedef nsString self_type;
typedef nsAString abstract_string_type;
nsString()
{
NS_StringContainerInit(*this);
}
nsString(const self_type& aString)
{
NS_StringContainerInit(*this);
NS_StringCopy(*this, aString);
}
explicit nsString(const abstract_string_type& aReadable)
{
NS_StringContainerInit(*this);
NS_StringCopy(*this, aReadable);
}
explicit nsString(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_StringContainerInit2(*this, aData, aLength, 0);
}
#ifdef MOZ_USE_CHAR16_WRAPPER
explicit nsString(char16ptr_t aData, size_type aLength = UINT32_MAX)
: nsString(static_cast<const char16_t*>(aData), aLength)
{
}
#endif
~nsString()
{
NS_StringContainerFinish(*this);
}
char16ptr_t get() const
{
return char16ptr_t(BeginReading());
}
self_type& operator=(const self_type& aString)
{
Assign(aString);
return *this;
}
self_type& operator=(const abstract_string_type& aReadable)
{
Assign(aReadable);
return *this;
}
self_type& operator=(const char_type* aPtr)
{
Assign(aPtr);
return *this;
}
self_type& operator=(char_type aChar)
{
Assign(aChar);
return *this;
}
void Adopt(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_StringContainerFinish(*this);
NS_StringContainerInit2(*this, aData, aLength,
NS_STRING_CONTAINER_INIT_ADOPT);
}
protected:
nsString(const char_type* aData, size_type aLength, uint32_t aFlags)
{
NS_StringContainerInit2(*this, aData, aLength, aFlags);
}
};
class nsCString : public nsCStringContainer
{
public:
typedef nsCString self_type;
typedef nsACString abstract_string_type;
nsCString()
{
NS_CStringContainerInit(*this);
}
nsCString(const self_type& aString)
{
NS_CStringContainerInit(*this);
NS_CStringCopy(*this, aString);
}
explicit nsCString(const abstract_string_type& aReadable)
{
NS_CStringContainerInit(*this);
NS_CStringCopy(*this, aReadable);
}
explicit nsCString(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_CStringContainerInit(*this);
NS_CStringSetData(*this, aData, aLength);
}
~nsCString()
{
NS_CStringContainerFinish(*this);
}
const char_type* get() const
{
return BeginReading();
}
self_type& operator=(const self_type& aString)
{
Assign(aString);
return *this;
}
self_type& operator=(const abstract_string_type& aReadable)
{
Assign(aReadable);
return *this;
}
self_type& operator=(const char_type* aPtr)
{
Assign(aPtr);
return *this;
}
self_type& operator=(char_type aChar)
{
Assign(aChar);
return *this;
}
void Adopt(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_CStringContainerFinish(*this);
NS_CStringContainerInit2(*this, aData, aLength,
NS_CSTRING_CONTAINER_INIT_ADOPT);
}
protected:
nsCString(const char_type* aData, size_type aLength, uint32_t aFlags)
{
NS_CStringContainerInit2(*this, aData, aLength, aFlags);
}
};
/**
* dependent strings
*/
class nsDependentString : public nsString
{
public:
typedef nsDependentString self_type;
nsDependentString() {}
explicit nsDependentString(const char_type* aData,
size_type aLength = UINT32_MAX)
: nsString(aData, aLength, NS_CSTRING_CONTAINER_INIT_DEPEND)
{
}
#ifdef MOZ_USE_CHAR16_WRAPPER
explicit nsDependentString(char16ptr_t aData, size_type aLength = UINT32_MAX)
: nsDependentString(static_cast<const char16_t*>(aData), aLength)
{
}
#endif
void Rebind(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_StringContainerFinish(*this);
NS_StringContainerInit2(*this, aData, aLength,
NS_STRING_CONTAINER_INIT_DEPEND);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
class nsDependentCString : public nsCString
{
public:
typedef nsDependentCString self_type;
nsDependentCString() {}
explicit nsDependentCString(const char_type* aData,
size_type aLength = UINT32_MAX)
: nsCString(aData, aLength, NS_CSTRING_CONTAINER_INIT_DEPEND)
{
}
void Rebind(const char_type* aData, size_type aLength = UINT32_MAX)
{
NS_CStringContainerFinish(*this);
NS_CStringContainerInit2(*this, aData, aLength,
NS_CSTRING_CONTAINER_INIT_DEPEND);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
/**
* conversion classes
*/
inline void
CopyUTF16toUTF8(const nsAString& aSource, nsACString& aDest)
{
NS_UTF16ToCString(aSource, NS_CSTRING_ENCODING_UTF8, aDest);
}
inline void
CopyUTF8toUTF16(const nsACString& aSource, nsAString& aDest)
{
NS_CStringToUTF16(aSource, NS_CSTRING_ENCODING_UTF8, aDest);
}
inline void
LossyCopyUTF16toASCII(const nsAString& aSource, nsACString& aDest)
{
NS_UTF16ToCString(aSource, NS_CSTRING_ENCODING_ASCII, aDest);
}
inline void
CopyASCIItoUTF16(const nsACString& aSource, nsAString& aDest)
{
NS_CStringToUTF16(aSource, NS_CSTRING_ENCODING_ASCII, aDest);
}
NS_COM_GLUE char*
ToNewUTF8String(const nsAString& aSource);
class NS_ConvertASCIItoUTF16 : public nsString
{
public:
typedef NS_ConvertASCIItoUTF16 self_type;
explicit NS_ConvertASCIItoUTF16(const nsACString& aStr)
{
NS_CStringToUTF16(aStr, NS_CSTRING_ENCODING_ASCII, *this);
}
explicit NS_ConvertASCIItoUTF16(const char* aData,
uint32_t aLength = UINT32_MAX)
{
NS_CStringToUTF16(nsDependentCString(aData, aLength),
NS_CSTRING_ENCODING_ASCII, *this);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
class NS_ConvertUTF8toUTF16 : public nsString
{
public:
typedef NS_ConvertUTF8toUTF16 self_type;
explicit NS_ConvertUTF8toUTF16(const nsACString& aStr)
{
NS_CStringToUTF16(aStr, NS_CSTRING_ENCODING_UTF8, *this);
}
explicit NS_ConvertUTF8toUTF16(const char* aData,
uint32_t aLength = UINT32_MAX)
{
NS_CStringToUTF16(nsDependentCString(aData, aLength),
NS_CSTRING_ENCODING_UTF8, *this);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
class NS_ConvertUTF16toUTF8 : public nsCString
{
public:
typedef NS_ConvertUTF16toUTF8 self_type;
explicit NS_ConvertUTF16toUTF8(const nsAString& aStr)
{
NS_UTF16ToCString(aStr, NS_CSTRING_ENCODING_UTF8, *this);
}
explicit NS_ConvertUTF16toUTF8(const char16_t* aData,
uint32_t aLength = UINT32_MAX)
{
NS_UTF16ToCString(nsDependentString(aData, aLength),
NS_CSTRING_ENCODING_UTF8, *this);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
class NS_LossyConvertUTF16toASCII : public nsCString
{
public:
typedef NS_LossyConvertUTF16toASCII self_type;
explicit NS_LossyConvertUTF16toASCII(const nsAString& aStr)
{
NS_UTF16ToCString(aStr, NS_CSTRING_ENCODING_ASCII, *this);
}
explicit NS_LossyConvertUTF16toASCII(const char16_t* aData,
uint32_t aLength = UINT32_MAX)
{
NS_UTF16ToCString(nsDependentString(aData, aLength),
NS_CSTRING_ENCODING_ASCII, *this);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
/**
* literal strings
*/
static_assert(sizeof(char16_t) == 2, "size of char16_t must be 2");
static_assert(char16_t(-1) > char16_t(0), "char16_t must be unsigned");
#define NS_MULTILINE_LITERAL_STRING(s) \
nsDependentString(reinterpret_cast<const nsAString::char_type*>(s), \
uint32_t((sizeof(s) / 2) - 1))
#define NS_MULTILINE_LITERAL_STRING_INIT(n, s) \
n(reinterpret_cast<const nsAString::char_type*>(s), \
uint32_t((sizeof(s) / 2) - 1))
#define NS_NAMED_MULTILINE_LITERAL_STRING(n,s) \
const nsDependentString n(reinterpret_cast<const nsAString::char_type*>(s), \
uint32_t((sizeof(s) / 2) - 1))
typedef nsDependentString nsLiteralString;
/* Check that char16_t is unsigned */
static_assert(char16_t(-1) > char16_t(0),
"char16_t is by definition an unsigned type");
#define NS_LITERAL_STRING(s) \
static_cast<const nsString&>(NS_MULTILINE_LITERAL_STRING(MOZ_UTF16(s)))
#define NS_LITERAL_STRING_INIT(n, s) \
NS_MULTILINE_LITERAL_STRING_INIT(n, MOZ_UTF16(s))
#define NS_NAMED_LITERAL_STRING(n, s) \
NS_NAMED_MULTILINE_LITERAL_STRING(n, MOZ_UTF16(s))
#define NS_LITERAL_CSTRING(s) \
static_cast<const nsDependentCString&>(nsDependentCString(s, uint32_t(sizeof(s) - 1)))
#define NS_LITERAL_CSTRING_INIT(n, s) \
n(s, uint32_t(sizeof(s)-1))
#define NS_NAMED_LITERAL_CSTRING(n, s) \
const nsDependentCString n(s, uint32_t(sizeof(s)-1))
typedef nsDependentCString nsLiteralCString;
/**
* getter_Copies support
*
* NS_IMETHOD GetBlah(char16_t**);
*
* void some_function()
* {
* nsString blah;
* GetBlah(getter_Copies(blah));
* // ...
* }
*/
class nsGetterCopies
{
public:
typedef char16_t char_type;
explicit nsGetterCopies(nsString& aStr)
: mString(aStr)
, mData(nullptr)
{
}
~nsGetterCopies() { mString.Adopt(mData); }
operator char_type**() { return &mData; }
private:
nsString& mString;
char_type* mData;
};
inline nsGetterCopies
getter_Copies(nsString& aString)
{
return nsGetterCopies(aString);
}
class nsCGetterCopies
{
public:
typedef char char_type;
explicit nsCGetterCopies(nsCString& aStr)
: mString(aStr)
, mData(nullptr)
{
}
~nsCGetterCopies() { mString.Adopt(mData); }
operator char_type**() { return &mData; }
private:
nsCString& mString;
char_type* mData;
};
inline nsCGetterCopies
getter_Copies(nsCString& aString)
{
return nsCGetterCopies(aString);
}
/**
* substrings
*/
class NS_COM_GLUE nsDependentSubstring : public nsStringContainer
{
public:
typedef nsDependentSubstring self_type;
typedef nsAString abstract_string_type;
~nsDependentSubstring() { NS_StringContainerFinish(*this); }
nsDependentSubstring() { NS_StringContainerInit(*this); }
nsDependentSubstring(const char_type* aStart, uint32_t aLength)
{
NS_StringContainerInit2(*this, aStart, aLength,
NS_STRING_CONTAINER_INIT_DEPEND |
NS_STRING_CONTAINER_INIT_SUBSTRING);
}
nsDependentSubstring(const abstract_string_type& aStr,
uint32_t aStartPos);
nsDependentSubstring(const abstract_string_type& aStr,
uint32_t aStartPos, uint32_t aLength);
void Rebind(const char_type* aStart, uint32_t aLength)
{
NS_StringContainerFinish(*this);
NS_StringContainerInit2(*this, aStart, aLength,
NS_STRING_CONTAINER_INIT_DEPEND |
NS_STRING_CONTAINER_INIT_SUBSTRING);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
class NS_COM_GLUE nsDependentCSubstring : public nsCStringContainer
{
public:
typedef nsDependentCSubstring self_type;
typedef nsACString abstract_string_type;
~nsDependentCSubstring() { NS_CStringContainerFinish(*this); }
nsDependentCSubstring() { NS_CStringContainerInit(*this); }
nsDependentCSubstring(const char_type* aStart, uint32_t aLength)
{
NS_CStringContainerInit2(*this, aStart, aLength,
NS_CSTRING_CONTAINER_INIT_DEPEND |
NS_CSTRING_CONTAINER_INIT_SUBSTRING);
}
nsDependentCSubstring(const abstract_string_type& aStr,
uint32_t aStartPos);
nsDependentCSubstring(const abstract_string_type& aStr,
uint32_t aStartPos, uint32_t aLength);
void Rebind(const char_type* aStart, uint32_t aLength)
{
NS_CStringContainerFinish(*this);
NS_CStringContainerInit2(*this, aStart, aLength,
NS_CSTRING_CONTAINER_INIT_DEPEND |
NS_CSTRING_CONTAINER_INIT_SUBSTRING);
}
private:
self_type& operator=(const self_type& aString) MOZ_DELETE;
};
/**
* Various nsDependentC?Substring constructor functions
*/
// char16_t
inline const nsDependentSubstring
Substring(const nsAString& aStr, uint32_t aStartPos)
{
return nsDependentSubstring(aStr, aStartPos);
}
inline const nsDependentSubstring
Substring(const nsAString& aStr, uint32_t aStartPos, uint32_t aLength)
{
return nsDependentSubstring(aStr, aStartPos, aLength);
}
inline const nsDependentSubstring
Substring(const char16_t* aStart, const char16_t* aEnd)
{
NS_ABORT_IF_FALSE(uint32_t(aEnd - aStart) == uintptr_t(aEnd - aStart),
"string too long");
return nsDependentSubstring(aStart, uint32_t(aEnd - aStart));
}
inline const nsDependentSubstring
Substring(const char16_t* aStart, uint32_t aLength)
{
return nsDependentSubstring(aStart, aLength);
}
inline const nsDependentSubstring
StringHead(const nsAString& aStr, uint32_t aCount)
{
return nsDependentSubstring(aStr, 0, aCount);
}
inline const nsDependentSubstring
StringTail(const nsAString& aStr, uint32_t aCount)
{
return nsDependentSubstring(aStr, aStr.Length() - aCount, aCount);
}
// char
inline const nsDependentCSubstring
Substring(const nsACString& aStr, uint32_t aStartPos)
{
return nsDependentCSubstring(aStr, aStartPos);
}
inline const nsDependentCSubstring
Substring(const nsACString& aStr, uint32_t aStartPos, uint32_t aLength)
{
return nsDependentCSubstring(aStr, aStartPos, aLength);
}
inline const nsDependentCSubstring
Substring(const char* aStart, const char* aEnd)
{
NS_ABORT_IF_FALSE(uint32_t(aEnd - aStart) == uintptr_t(aEnd - aStart),
"string too long");
return nsDependentCSubstring(aStart, uint32_t(aEnd - aStart));
}
inline const nsDependentCSubstring
Substring(const char* aStart, uint32_t aLength)
{
return nsDependentCSubstring(aStart, aLength);
}
inline const nsDependentCSubstring
StringHead(const nsACString& aStr, uint32_t aCount)
{
return nsDependentCSubstring(aStr, 0, aCount);
}
inline const nsDependentCSubstring
StringTail(const nsACString& aStr, uint32_t aCount)
{
return nsDependentCSubstring(aStr, aStr.Length() - aCount, aCount);
}
inline bool
StringBeginsWith(const nsAString& aSource, const nsAString& aSubstring,
nsAString::ComparatorFunc aComparator = nsAString::DefaultComparator)
{
return aSubstring.Length() <= aSource.Length() &&
StringHead(aSource, aSubstring.Length()).Equals(aSubstring, aComparator);
}
inline bool
StringEndsWith(const nsAString& aSource, const nsAString& aSubstring,
nsAString::ComparatorFunc aComparator = nsAString::DefaultComparator)
{
return aSubstring.Length() <= aSource.Length() &&
StringTail(aSource, aSubstring.Length()).Equals(aSubstring, aComparator);
}
inline bool
StringBeginsWith(const nsACString& aSource, const nsACString& aSubstring,
nsACString::ComparatorFunc aComparator = nsACString::DefaultComparator)
{
return aSubstring.Length() <= aSource.Length() &&
StringHead(aSource, aSubstring.Length()).Equals(aSubstring, aComparator);
}
inline bool
StringEndsWith(const nsACString& aSource, const nsACString& aSubstring,
nsACString::ComparatorFunc aComparator = nsACString::DefaultComparator)
{
return aSubstring.Length() <= aSource.Length() &&
StringTail(aSource, aSubstring.Length()).Equals(aSubstring, aComparator);
}
/**
* Trim whitespace from the beginning and end of a string; then compress
* remaining runs of whitespace characters to a single space.
*/
NS_HIDDEN_(void) CompressWhitespace(nsAString& aString);
#define EmptyCString() nsCString()
#define EmptyString() nsString()
/**
* Convert an ASCII string to all upper/lowercase (a-z,A-Z only). As a bonus,
* returns the string length.
*/
NS_HIDDEN_(uint32_t) ToLowerCase(nsACString& aStr);
NS_HIDDEN_(uint32_t) ToUpperCase(nsACString& aStr);
NS_HIDDEN_(uint32_t) ToLowerCase(const nsACString& aSrc, nsACString& aDest);
NS_HIDDEN_(uint32_t) ToUpperCase(const nsACString& aSrc, nsACString& aDest);
/**
* The following declarations are *deprecated*, and are included here only
* to make porting from existing code that doesn't use the frozen string API
* easier. They may disappear in the future.
*/
inline char*
ToNewCString(const nsACString& aStr)
{
return NS_CStringCloneData(aStr);
}
inline char16_t*
ToNewUnicode(const nsAString& aStr)
{
return NS_StringCloneData(aStr);
}
typedef nsString PromiseFlatString;
typedef nsCString PromiseFlatCString;
typedef nsCString nsAutoCString;
typedef nsString nsAutoString;
NS_HIDDEN_(bool) ParseString(const nsACString& aAstring, char aDelimiter,
nsTArray<nsCString>& aArray);
#endif // nsStringAPI_h__
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