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nsAString (External) 编辑

Class Declaration

This header provides wrapper classes around the frozen string API
which are roughly equivalent to the internal string classes.

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Method Overview

BeginReading
EndReading
CharAt
operator[]
First
BeginWriting
EndWriting
SetLength
Length
IsEmpty
SetIsVoid
IsVoid
Assign
AssignLiteral
operator=
Replace
Append
AppendLiteral
operator+=
Insert
Cut
Truncate
StripChars
StripWhitespace
Trim
DefaultComparator
Compare
Equals
operator<
operator<=
operator==
operator>=
operator>
operator!=
EqualsLiteral
LowerCaseEqualsLiteral
Find
RFind
FindChar
RFindChar
AppendInt
ToInteger

Data Members

No public members.

Methods

BeginReading

PRUint32 BeginReading(const PRUnichar**, const PRUnichar**) const - source
Returns the length, beginning, and end of a string in one operation.

Parameters

  • PRUnichar** begin
  • PRUnichar** end
PRUnichar* BeginReading() const - source

EndReading

PRUnichar* EndReading() const - source

CharAt

PRUnichar CharAt(PRUint32) const - source

Parameters

  • PRUint32 aPos

operator[]

PRUnichar operator[](PRUint32) const - source

Parameters

  • PRUint32 aPos

First

PRUnichar First() const - source

BeginWriting

PRUint32 BeginWriting(PRUnichar**, PRUnichar**, PRUint32) - source
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 PR_UINT32_MAX
to leave the length unchanged.
@return  The new length of the string, or 0 if resizing failed.

Parameters

  • PRUnichar** begin
  • PRUnichar** end
  • PRUint32 newSize
PRUnichar* BeginWriting(PRUint32) - source

Parameters

  • PRUint32 <anonymous>

EndWriting

PRUnichar* EndWriting() - source

SetLength

PRBool SetLength(PRUint32) - source

Parameters

  • PRUint32 aLen

Length

PRUint32 Length() const - source

IsEmpty

PRBool IsEmpty() const - source

SetIsVoid

void SetIsVoid(PRBool) - source

Parameters

  • PRBool val

IsVoid

PRBool IsVoid() const - source

Assign

void Assign(const nsAString&) - source

Parameters

  • nsAString& aString
void Assign(const PRUnichar*, PRUint32) - source

Parameters

  • PRUnichar* aData
  • PRUint32 aLength
void Assign(PRUnichar) - source

Parameters

  • PRUnichar aChar

AssignLiteral

void AssignLiteral(const char*) - source

Parameters

  • char* aStr

operator=

nsAString& operator=(const nsAString&) - source

Parameters

  • nsAString& aString
nsAString& operator=(const PRUnichar*) - source

Parameters

  • PRUnichar* aPtr
nsAString& operator=(PRUnichar) - source

Parameters

  • PRUnichar aChar

Replace

void Replace(PRUint32, PRUint32, const PRUnichar*, PRUint32) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • PRUnichar* data
  • PRUint32 length
void Replace(PRUint32, PRUint32, PRUnichar) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • PRUnichar c
void Replace(PRUint32, PRUint32, const nsAString&) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • nsAString& readable

Append

void Append(PRUnichar) - source

Parameters

  • PRUnichar c
void Append(const PRUnichar*, PRUint32) - source

Parameters

  • PRUnichar* data
  • PRUint32 length
void Append(const nsAString&) - source

Parameters

  • nsAString& readable

AppendLiteral

void AppendLiteral(const char*) - source

Parameters

  • char* aASCIIStr

operator+=

nsAString& operator+=(PRUnichar) - source

Parameters

  • PRUnichar c
nsAString& operator+=(const PRUnichar*) - source

Parameters

  • PRUnichar* data
nsAString& operator+=(const nsAString&) - source

Parameters

  • nsAString& readable

Insert

void Insert(PRUnichar, PRUint32) - source

Parameters

  • PRUnichar c
  • PRUint32 pos
void Insert(const PRUnichar*, PRUint32, PRUint32) - source

Parameters

  • PRUnichar* data
  • PRUint32 pos
  • PRUint32 length
void Insert(const nsAString&, PRUint32) - source

Parameters

  • nsAString& readable
  • PRUint32 pos

Cut

void Cut(PRUint32, PRUint32) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength

Truncate

void Truncate() - source

StripChars

void StripChars(const char*) - source
Remove all occurences of characters in aSet from the string.

Parameters

  • char* aSet

StripWhitespace

void StripWhitespace() - source
Strip whitespace characters from the string.

Trim

void Trim(const char*, PRBool, PRBool) - source

Parameters

  • char* aSet
  • PRBool aLeading
  • PRBool aTrailing

DefaultComparator

PRInt32 DefaultComparator(const PRUnichar*, const PRUnichar*, PRUint32) - source

Parameters

  • PRUnichar* a
  • PRUnichar* b
  • PRUint32 length

Compare

PRInt32 Compare(const PRUnichar*, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source

Parameters

  • PRUnichar* other
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c
PRInt32 Compare(const nsAString&, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source

Parameters

  • nsAString& other
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c

Equals

PRBool Equals(const PRUnichar*, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source

Parameters

  • PRUnichar* other
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c
PRBool Equals(const nsAString&, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source

Parameters

  • nsAString& other
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c

operator<

PRBool operator<(const nsAString&) const - source

Parameters

  • nsAString& other
PRBool operator<(const PRUnichar*) const - source

Parameters

  • PRUnichar* other

operator<=

PRBool operator<=(const nsAString&) const - source

Parameters

  • nsAString& other
PRBool operator<=(const PRUnichar*) const - source

Parameters

  • PRUnichar* other

operator==

PRBool operator==(const nsAString&) const - source

Parameters

  • nsAString& other
PRBool operator==(const PRUnichar*) const - source

Parameters

  • PRUnichar* other

operator>=

PRBool operator>=(const nsAString&) const - source

Parameters

  • nsAString& other
PRBool operator>=(const PRUnichar*) const - source

Parameters

  • PRUnichar* other

operator>

PRBool operator>(const nsAString&) const - source

Parameters

  • nsAString& other
PRBool operator>(const PRUnichar*) const - source

Parameters

  • PRUnichar* other

operator!=

PRBool operator!=(const nsAString&) const - source

Parameters

  • nsAString& other
PRBool operator!=(const PRUnichar*) const - source

Parameters

  • PRUnichar* other

EqualsLiteral

PRBool EqualsLiteral(const char*) const - source

Parameters

  • char* aASCIIString

LowerCaseEqualsLiteral

PRBool LowerCaseEqualsLiteral(const char*) const - source
Case-insensitive match this string to a lowercase ASCII string.

Parameters

  • char* aASCIIString

Find

PRInt32 Find(const nsAString&, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source
Find the first occurrence of aStr in this string.

@return the offset of aStr, or -1 if not found

Parameters

  • nsAString& aStr
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c
PRInt32 Find(const nsAString&, PRUint32, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source
Find the first occurrence of aStr in this string, beginning at aOffset.

@return the offset of aStr, or -1 if not found

Parameters

  • nsAString& aStr
  • PRUint32 aOffset
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c
PRInt32 Find(const char*, PRBool) const - source
Find an ASCII string within this string.

@return the offset of aStr, or -1 if not found.

Parameters

  • char* aStr
  • PRBool aIgnoreCase
PRInt32 Find(const char*, PRUint32, PRBool) const - source

Parameters

  • char* aStr
  • PRUint32 aOffset
  • PRBool aIgnoreCase

RFind

PRInt32 RFind(const nsAString&, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source
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.

Parameters

  • nsAString& aStr
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c
PRInt32 RFind(const nsAString&, PRInt32, PRInt32 (*)(const PRUnichar*, const PRUnichar*, PRUint32)) const - source
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.

Parameters

  • nsAString& aStr
  • PRInt32 aOffset
  • PRInt32 (*)(PRUnichar*, PRUnichar*, PRUint32) c
PRInt32 RFind(const char*, PRBool) const - source
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.

Parameters

  • char* aStr
  • PRBool aIgnoreCase
PRInt32 RFind(const char*, PRInt32, PRBool) const - source
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.

Parameters

  • char* aStr
  • PRInt32 aOffset
  • PRBool aIgnoreCase

FindChar

PRInt32 FindChar(PRUnichar, PRUint32) const - source
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.

Parameters

  • PRUnichar aChar
  • PRUint32 aOffset

RFindChar

PRInt32 RFindChar(PRUnichar) const - source
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.

Parameters

  • PRUnichar aChar

AppendInt

void AppendInt(int, PRInt32) - source
Append a string representation of a number.

Parameters

  • int aInt
  • PRInt32 aRadix

ToInteger

PRInt32 ToInteger(nsresult*, PRUint32) const - source
Convert this string to an integer.

@param aErrorCode pointer to contain result code.
@param aRadix must be 10 or 16

Parameters

  • nsresult* aErrorCode
  • PRUint32 aRadix

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