NS_LossyConvertUTF16toASCII

In This Article
  1. Method Overview
  2. Base Classes
  3. Data Members
  4. Methods
    1. Constructors
      1. Parameters
      2. Parameters
      3. Parameters
    2. operator=
      1. Parameters
      2. Parameters
      3. Parameters
      4. Parameters
      5. Parameters
      6. Parameters
    3. get
    4. Find
      1. Parameters
      2. Parameters
    5. RFind
      1. Parameters
      2. Parameters
    6. RFindChar
      1. Parameters
    7. FindCharInSet
      1. Parameters
      2. Parameters
    8. RFindCharInSet
      1. Parameters
      2. Parameters
    9. Compare
      1. Parameters
    10. EqualsIgnoreCase
      1. Parameters
    11. ToFloat
      1. Parameters
    12. ToInteger
      1. Parameters
    13. Mid
      1. Parameters
    14. Left
      1. Parameters
    15. Right
      1. Parameters
    16. SetCharAt
      1. Parameters
    17. StripChars
      1. Parameters
    18. StripWhitespace
    19. ReplaceChar
      1. Parameters
      2. Parameters
    20. ReplaceSubstring
      1. Parameters
      2. Parameters
    21. Trim
      1. Parameters
    22. CompressWhitespace
      1. Parameters
    23. AssignWithConversion
      1. Parameters
      2. Parameters
    24. AppendWithConversion
      1. Parameters
      2. Parameters
    25. AppendInt
      1. Parameters
      2. Parameters
      3. Parameters
    26. AppendFloat
      1. Parameters
      2. Parameters
    27. BeginReading
      1. Parameters
      2. Parameters
    28. EndReading
      1. Parameters
      2. Parameters
    29. BeginWriting
      1. Parameters
      2. Parameters
    30. EndWriting
      1. Parameters
      2. Parameters
    31. Data
    32. Length
    33. IsEmpty
    34. IsVoid
    35. IsTerminated
    36. CharAt
      1. Parameters
    37. operator[]
      1. Parameters
    38. First
    39. Last
    40. CountChar
      1. Parameters
    41. FindChar
      1. Parameters
    42. Equals
      1. Parameters
      2. Parameters
      3. Parameters
      4. Parameters
    43. EqualsASCII
      1. Parameters
      2. Parameters
    44. EqualsLiteral(const char
    45. EqualsLiteral(char
    46. LowerCaseEqualsASCII
      1. Parameters
      2. Parameters
    47. LowerCaseEqualsLiteral(const char
    48. LowerCaseEqualsLiteral(char
    49. Assign
      1. Parameters
      2. Parameters
      3. Parameters
      4. Parameters
    50. AssignASCII
      1. Parameters
      2. Parameters
    51. AssignLiteral(const char
    52. AssignLiteral(char
    53. Adopt
      1. Parameters
    54. Replace
      1. Parameters
      2. Parameters
      3. Parameters
      4. Parameters
    55. ReplaceASCII
      1. Parameters
    56. Append
      1. Parameters
      2. Parameters
      3. Parameters
      4. Parameters
    57. AppendASCII
      1. Parameters
    58. AppendLiteral(const char
    59. AppendLiteral(char
    60. operator+=
      1. Parameters
      2. Parameters
      3. Parameters
      4. Parameters
    61. Insert
      1. Parameters
      2. Parameters
      3. Parameters
      4. Parameters
    62. Cut
      1. Parameters
    63. SetCapacity
      1. Parameters
    64. SetLength
      1. Parameters
    65. Truncate
      1. Parameters
    66. GetData
      1. Parameters
    67. GetMutableData
      1. Parameters
    68. SetIsVoid
      1. Parameters
    69. StripChar
      1. Parameters

Class Declaration

A helper class that converts a UTF-16 string to ASCII in a lossy manner

Method Overview

Constructors
operator=
get
Find
RFind
RFindChar
FindCharInSet
RFindCharInSet
Compare
EqualsIgnoreCase
ToFloat
ToInteger
Mid
Left
Right
SetCharAt
StripChars
StripWhitespace
ReplaceChar
ReplaceSubstring
Trim
CompressWhitespace
AssignWithConversion
AppendWithConversion
AppendInt
AppendFloat
BeginReading
EndReading
BeginWriting
EndWriting
Data
Length
IsEmpty
IsVoid
IsTerminated
CharAt
operator[]
First
Last
CountChar
FindChar
Equals
EqualsASCII
EqualsLiteral(const char
EqualsLiteral(char
LowerCaseEqualsASCII
LowerCaseEqualsLiteral(const char
LowerCaseEqualsLiteral(char
Assign
AssignASCII
AssignLiteral(const char
AssignLiteral(char
Adopt
Replace
ReplaceASCII
Append
AppendASCII
AppendLiteral(const char
AppendLiteral(char
operator+=
Insert
Cut
SetCapacity
SetLength
Truncate
GetData
GetMutableData
SetIsVoid
StripChar

Base Classes

Data Members

No public members.

Methods

Constructors

void NS_LossyConvertUTF16toASCII(const PRUnichar*) - source
A helper class that converts a UTF-16 string to ASCII in a lossy manner

Parameters

  • PRUnichar* aString
void NS_LossyConvertUTF16toASCII(const PRUnichar*, PRUint32) - source

Parameters

  • PRUnichar* aString
  • PRUint32 aLength
void NS_LossyConvertUTF16toASCII(const nsAString_internal&) - source

Parameters

  • nsAString_internal& aString

operator=

nsCAutoString& operator=(const nsCAutoString&) - source

Parameters

  • nsCAutoString& str
nsCString& operator=(const nsCString&) - source

Parameters

  • nsCString& str
nsACString_internal& operator=(char) - source

Parameters

  • char c
nsACString_internal& operator=(const char*) - source

Parameters

  • char* data
nsACString_internal& operator=(const nsACString_internal&) - source

Parameters

  • nsACString_internal& str
nsACString_internal& operator=(const nsCSubstringTuple&) - source

Parameters

  • nsCSubstringTuple& tuple

get

char* get() const - source
returns the null-terminated string

Find

PRInt32 Find(const nsCString&, PRBool, PRInt32, PRInt32) const - source
Search for the given substring within this string.

@param   aString is substring to be sought in this
@param   aIgnoreCase selects case sensitivity
@param   aOffset tells us where in this string to start searching
@param   aCount tells us how far from the offset we are to search. Use
-1 to search the whole string.
@return  offset in string, or kNotFound

Parameters

  • nsCString& aString
  • PRBool aIgnoreCase
  • PRInt32 aOffset
  • PRInt32 aCount
PRInt32 Find(const char*, PRBool, PRInt32, PRInt32) const - source

Parameters

  • char* aString
  • PRBool aIgnoreCase
  • PRInt32 aOffset
  • PRInt32 aCount

RFind

PRInt32 RFind(const nsCString&, PRBool, PRInt32, PRInt32) const - source
This methods scans the string backwards, looking for the given string

@param   aString is substring to be sought in this
@param   aIgnoreCase tells us whether or not to do caseless compare
@param   aOffset tells us where in this string to start searching.
Use -1 to search from the end of the string.
@param   aCount tells us how many iterations to make starting at the
given offset.
@return  offset in string, or kNotFound

Parameters

  • nsCString& aString
  • PRBool aIgnoreCase
  • PRInt32 aOffset
  • PRInt32 aCount
PRInt32 RFind(const char*, PRBool, PRInt32, PRInt32) const - source

Parameters

  • char* aCString
  • PRBool aIgnoreCase
  • PRInt32 aOffset
  • PRInt32 aCount

RFindChar

PRInt32 RFindChar(PRUnichar, PRInt32, PRInt32) const - source

Parameters

  • PRUnichar aChar
  • PRInt32 aOffset
  • PRInt32 aCount

FindCharInSet

PRInt32 FindCharInSet(const char*, PRInt32) const - source
This method searches this string for the first character found in
the given string.

@param aString contains set of chars to be found
@param aOffset tells us where in this string to start searching
(counting from left)
@return offset in string, or kNotFound

Parameters

  • char* aString
  • PRInt32 aOffset
PRInt32 FindCharInSet(const nsCString&, PRInt32) const - source

Parameters

  • nsCString& aString
  • PRInt32 aOffset

RFindCharInSet

PRInt32 RFindCharInSet(const char*, PRInt32) const - source
This method searches this string for the last character found in
the given string.

@param aString contains set of chars to be found
@param aOffset tells us where in this string to start searching
(counting from left)
@return offset in string, or kNotFound

Parameters

  • char* aString
  • PRInt32 aOffset
PRInt32 RFindCharInSet(const nsCString&, PRInt32) const - source

Parameters

  • nsCString& aString
  • PRInt32 aOffset

Compare

PRInt32 Compare(const char*, PRBool, PRInt32) const - source
Compares a given string to this string. 

@param   aString is the string to be compared
@param   aIgnoreCase tells us how to treat case
@param   aCount tells us how many chars to compare
@return  -1,0,1

Parameters

  • char* aString
  • PRBool aIgnoreCase
  • PRInt32 aCount

EqualsIgnoreCase

PRBool EqualsIgnoreCase(const char*, PRInt32) const - source
Equality check between given string and this string.

@param   aString is the string to check
@param   aIgnoreCase tells us how to treat case
@param   aCount tells us how many chars to compare
@return  boolean

Parameters

  • char* aString
  • PRInt32 aCount

ToFloat

float ToFloat(PRInt32*) const - source
Perform string to float conversion.

@param   aErrorCode will contain error if one occurs
@return  float rep of string value

Parameters

  • PRInt32* aErrorCode

ToInteger

PRInt32 ToInteger(PRInt32*, PRUint32) const - source

Parameters

  • PRInt32* aErrorCode
  • PRUint32 aRadix

Mid

PRUint32 Mid(nsCString&, PRUint32, PRUint32) const - source

Parameters

  • nsCString& aResult
  • PRUint32 aStartPos
  • PRUint32 aCount

Left

PRUint32 Left(nsCString&, PRUint32) const - source

Parameters

  • nsCString& aResult
  • PRUint32 aCount
PRUint32 Right(nsCString&, PRUint32) const - source

Parameters

  • nsCString& aResult
  • PRUint32 aCount

SetCharAt

PRBool SetCharAt(PRUnichar, PRUint32) - source
Set a char inside this string at given index

@param aChar is the char you want to write into this string
@param anIndex is the ofs where you want to write the given char
@return TRUE if successful

Parameters

  • PRUnichar aChar
  • PRUint32 aIndex

StripChars

void StripChars(const char*) - source
These methods are used to remove all occurrences of the
characters found in aSet from this string.

@param  aSet -- characters to be cut from this

Parameters

  • char* aSet

StripWhitespace

void StripWhitespace() - source
This method strips whitespace throughout the string.

ReplaceChar

void ReplaceChar(char, char) - source
swaps occurence of 1 string for another

Parameters

  • char aOldChar
  • char aNewChar
void ReplaceChar(const char*, char) - source

Parameters

  • char* aSet
  • char aNewChar

ReplaceSubstring

void ReplaceSubstring(const nsCString&, const nsCString&) - source

Parameters

  • nsCString& aTarget
  • nsCString& aNewValue
void ReplaceSubstring(const char*, const char*) - source

Parameters

  • char* aTarget
  • char* aNewValue

Trim

void Trim(const char*, PRBool, PRBool, PRBool) - source
This method trims characters found in aTrimSet from
either end of the underlying string.

@param   aSet -- contains chars to be trimmed from both ends
@param   aEliminateLeading
@param   aEliminateTrailing
@param   aIgnoreQuotes -- if true, causes surrounding quotes to be ignored
@return  this

Parameters

  • char* aSet
  • PRBool aEliminateLeading
  • PRBool aEliminateTrailing
  • PRBool aIgnoreQuotes

CompressWhitespace

void CompressWhitespace(PRBool, PRBool) - source
This method strips whitespace from string.
You can control whether whitespace is yanked from start and end of
string as well.

@param   aEliminateLeading controls stripping of leading ws
@param   aEliminateTrailing controls stripping of trailing ws

Parameters

  • PRBool aEliminateLeading
  • PRBool aEliminateTrailing

AssignWithConversion

void AssignWithConversion(const nsAString_internal&) - source
assign/append/insert with _LOSSY_ conversion

Parameters

  • nsAString_internal& aString
void AssignWithConversion(const PRUnichar*, PRInt32) - source

Parameters

  • PRUnichar* aData
  • PRInt32 aLength

AppendWithConversion

void AppendWithConversion(const nsAString_internal&) - source

Parameters

  • nsAString_internal& aString
void AppendWithConversion(const PRUnichar*, PRInt32) - source

Parameters

  • PRUnichar* aData
  • PRInt32 aLength

AppendInt

void AppendInt(PRInt32, PRInt32) - source
Append the given integer to this string

Parameters

  • PRInt32 aInteger
  • PRInt32 aRadix
void AppendInt(PRUint32, PRInt32) - source
Append the given unsigned integer to this string

Parameters

  • PRUint32 aInteger
  • PRInt32 aRadix
void AppendInt(PRInt64, PRInt32) - source

Parameters

  • PRInt64 aInteger
  • PRInt32 aRadix

AppendFloat

void AppendFloat(float) - source
Append the given float to this string

Parameters

  • float aFloat
void AppendFloat(double) - source

Parameters

  • double aFloat

BeginReading

char* BeginReading() const - source
reading iterators
nsReadingIterator<char>& BeginReading(nsReadingIterator<char>&) const - source
deprecated reading iterators

Parameters

  • nsReadingIterator<char>& iter
char*& BeginReading(const char*&) const - source

Parameters

  • char*& iter

EndReading

char* EndReading() const - source
nsReadingIterator<char>& EndReading(nsReadingIterator<char>&) const - source

Parameters

  • nsReadingIterator<char>& iter
char*& EndReading(const char*&) const - source

Parameters

  • char*& iter

BeginWriting

char* BeginWriting() - source
writing iterators
nsWritingIterator<char>& BeginWriting(nsWritingIterator<char>&) - source
deprecated writing iterators

Parameters

  • nsWritingIterator<char>& iter
char*& BeginWriting(char*&) - source

Parameters

  • char*& iter

EndWriting

char* EndWriting() - source
nsWritingIterator<char>& EndWriting(nsWritingIterator<char>&) - source

Parameters

  • nsWritingIterator<char>& iter
char*& EndWriting(char*&) - source

Parameters

  • char*& iter

Data

char* Data() const - source
accessors

Length

PRUint32 Length() const - source

IsEmpty

PRBool IsEmpty() const - source

IsVoid

PRBool IsVoid() const - source

IsTerminated

PRBool IsTerminated() const - source

CharAt

char CharAt(PRUint32) const - source

Parameters

  • PRUint32 i

operator[]

char operator[](PRUint32) const - source

Parameters

  • PRUint32 i

First

char First() const - source

Last

char Last() const - source

CountChar

PRUint32 CountChar(char) const - source

Parameters

  • char <anonymous>

FindChar

PRInt32 FindChar(char, PRUint32) const - source

Parameters

  • char <anonymous>
  • PRUint32 offset

Equals

PRBool Equals(const nsACString_internal&) const - source
equality

Parameters

  • nsACString_internal& <anonymous>
PRBool Equals(const nsACString_internal&, const nsCStringComparator&) const - source

Parameters

  • nsACString_internal& <anonymous>
  • nsCStringComparator& <anonymous>
PRBool Equals(const char*) const - source

Parameters

  • char* data
PRBool Equals(const char*, const nsCStringComparator&) const - source

Parameters

  • char* data
  • nsCStringComparator& comp

EqualsASCII

PRBool EqualsASCII(const char*, PRUint32) const - source
An efficient comparison with ASCII that can be used even
for wide strings. Call this version when you know the
length of 'data'.

Parameters

  • char* data
  • PRUint32 len
PRBool EqualsASCII(const char*) const - source
An efficient comparison with ASCII that can be used even
for wide strings. Call this version when 'data' is
null-terminated.

Parameters

  • char* data

EqualsLiteral(const char

PRBool EqualsLiteral(const char (&)[N]) const - source

EqualsLiteral(char

PRBool EqualsLiteral(char (&)[N]) const - source

LowerCaseEqualsASCII

PRBool LowerCaseEqualsASCII(const char*, PRUint32) const - source

Parameters

  • char* data
  • PRUint32 len
PRBool LowerCaseEqualsASCII(const char*) const - source

Parameters

  • char* data

LowerCaseEqualsLiteral(const char

PRBool LowerCaseEqualsLiteral(const char (&)[N]) const - source

LowerCaseEqualsLiteral(char

PRBool LowerCaseEqualsLiteral(char (&)[N]) const - source

Assign

void Assign(char) - source
assignment

Parameters

  • char c
void Assign(const char*, PRUint32) - source

Parameters

  • char* data
  • PRUint32 length
void Assign(const nsACString_internal&) - source

Parameters

  • nsACString_internal& <anonymous>
void Assign(const nsCSubstringTuple&) - source

Parameters

  • nsCSubstringTuple& <anonymous>

AssignASCII

void AssignASCII(const char*, PRUint32) - source

Parameters

  • char* data
  • PRUint32 length
void AssignASCII(const char*) - source

Parameters

  • char* data

AssignLiteral(const char

void AssignLiteral(const char (&)[N]) - source

AssignLiteral(char

void AssignLiteral(char (&)[N]) - source

Adopt

void Adopt(char*, PRUint32) - source

Parameters

  • char* data
  • PRUint32 length

Replace

void Replace(PRUint32, PRUint32, char) - source
buffer manipulation

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • char c
void Replace(PRUint32, PRUint32, const char*, PRUint32) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • char* data
  • PRUint32 length
void Replace(PRUint32, PRUint32, const nsACString_internal&) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • nsACString_internal& str
void Replace(PRUint32, PRUint32, const nsCSubstringTuple&) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • nsCSubstringTuple& tuple

ReplaceASCII

void ReplaceASCII(PRUint32, PRUint32, const char*, PRUint32) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength
  • char* data
  • PRUint32 length

Append

void Append(char) - source

Parameters

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

Parameters

  • char* data
  • PRUint32 length
void Append(const nsACString_internal&) - source

Parameters

  • nsACString_internal& str
void Append(const nsCSubstringTuple&) - source

Parameters

  • nsCSubstringTuple& tuple

AppendASCII

void AppendASCII(const char*, PRUint32) - source

Parameters

  • char* data
  • PRUint32 length

AppendLiteral(const char

void AppendLiteral(const char (&)[N]) - source

AppendLiteral(char

void AppendLiteral(char (&)[N]) - source

operator+=

nsACString_internal& operator+=(char) - source

Parameters

  • char c
nsACString_internal& operator+=(const char*) - source

Parameters

  • char* data
nsACString_internal& operator+=(const nsACString_internal&) - source

Parameters

  • nsACString_internal& str
nsACString_internal& operator+=(const nsCSubstringTuple&) - source

Parameters

  • nsCSubstringTuple& tuple

Insert

void Insert(char, PRUint32) - source

Parameters

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

Parameters

  • char* data
  • PRUint32 pos
  • PRUint32 length
void Insert(const nsACString_internal&, PRUint32) - source

Parameters

  • nsACString_internal& str
  • PRUint32 pos
void Insert(const nsCSubstringTuple&, PRUint32) - source

Parameters

  • nsCSubstringTuple& tuple
  • PRUint32 pos

Cut

void Cut(PRUint32, PRUint32) - source

Parameters

  • PRUint32 cutStart
  • PRUint32 cutLength

SetCapacity

void SetCapacity(PRUint32) - source
buffer sizing

Parameters

  • PRUint32 newCapacity

SetLength

void SetLength(PRUint32) - source

Parameters

  • PRUint32 newLength

Truncate

void Truncate(PRUint32) - source

Parameters

  • PRUint32 newLength

GetData

PRUint32 GetData(const char**) const - source
Get a const pointer to the string's internal buffer.  The caller
MUST NOT modify the characters at the returned address.

@returns The length of the buffer in characters.

Parameters

  • char** data

GetMutableData

PRUint32 GetMutableData(char**, PRUint32) - source
Get a pointer to the string's internal buffer, optionally resizing
the buffer first.  If size_type(-1) is passed for newLen, then the
current length of the string is used.  The caller MAY modify the
characters at the returned address (up to but not exceeding the
length of the string).

@returns The length of the buffer in characters or 0 if unable to
satisfy the request due to low-memory conditions.

Parameters

  • char** data
  • PRUint32 newLen

SetIsVoid

void SetIsVoid(PRBool) - source
string data is never null, but can be marked void.  if true, the
string will be truncated.  @see nsTSubstring::IsVoid

Parameters

  • PRBool <anonymous>

StripChar

void StripChar(char, PRInt32) - source
This method is used to remove all occurrences of aChar from this
string.

@param  aChar -- char to be stripped
@param  aOffset -- where in this string to start stripping chars

Parameters

  • char aChar
  • PRInt32 aOffset

Document Tags and Contributors

Contributors to this page: Benjamin Smedberg
Last updated by: Benjamin Smedberg,