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pjs/xpcom/glue/nsStringAPI.h

1088 строки
32 KiB
C++
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/* vim:set ts=2 sw=2 et cindent: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by IBM Corporation are Copyright (C) 2003
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
* Benjamin Smedberg <benjamin@smedbergs.us>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/**
* 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 "nsXPCOMStrings.h"
class nsAString
{
public:
typedef PRUnichar char_type;
typedef nsAString self_type;
typedef PRUint32 size_type;
typedef PRUint32 index_type;
/**
* Returns the length, beginning, and end of a string in one operation.
*/
NS_HIDDEN_(PRUint32) BeginReading(const char_type **begin,
const char_type **end = nsnull) const;
NS_HIDDEN_(const char_type*) BeginReading() const;
NS_HIDDEN_(const char_type*) EndReading() const;
/**
* 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.
*/
NS_HIDDEN_(PRUint32) BeginWriting(char_type **begin,
char_type **end = nsnull,
PRUint32 newSize = PR_UINT32_MAX);
NS_HIDDEN_(char_type*) BeginWriting();
NS_HIDDEN_(char_type*) EndWriting();
NS_HIDDEN_(PRBool) SetLength(PRUint32 aLen);
NS_HIDDEN_(size_type) Length() const
{
const char_type* data;
return NS_StringGetData(*this, &data);
}
NS_HIDDEN_(PRBool) IsEmpty() const
{
return Length() == 0;
}
NS_HIDDEN_(void) Assign(const self_type& aString)
{
NS_StringCopy(*this, aString);
}
NS_HIDDEN_(void) Assign(const char_type* aData, size_type aLength = PR_UINT32_MAX)
{
NS_StringSetData(*this, aData, aLength);
}
NS_HIDDEN_(void) Assign(char_type aChar)
{
NS_StringSetData(*this, &aChar, 1);
}
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 cutStart, size_type cutLength, const char_type* data, size_type length = size_type(-1) )
{
NS_StringSetDataRange(*this, cutStart, cutLength, data, length);
}
NS_HIDDEN_(void) Replace( index_type cutStart, size_type cutLength, char_type c )
{
Replace(cutStart, cutLength, &c, 1);
}
NS_HIDDEN_(void) Replace( index_type cutStart, size_type cutLength, const self_type& readable )
{
const char_type* data;
PRUint32 dataLen = NS_StringGetData(readable, &data);
NS_StringSetDataRange(*this, cutStart, cutLength, data, dataLen);
}
NS_HIDDEN_(void) Append( char_type c ) { Replace(size_type(-1), 0, c); }
NS_HIDDEN_(void) Append( const char_type* data, size_type length = size_type(-1) ) { Replace(size_type(-1), 0, data, length); }
NS_HIDDEN_(void) Append( const self_type& readable ) { Replace(size_type(-1), 0, readable); }
NS_HIDDEN_(self_type&) operator+=( char_type c ) { Append(c); return *this; }
NS_HIDDEN_(self_type&) operator+=( const char_type* data ) { Append(data); return *this; }
NS_HIDDEN_(self_type&) operator+=( const self_type& readable ) { Append(readable); return *this; }
NS_HIDDEN_(void) Insert( char_type c, index_type pos ) { Replace(pos, 0, c); }
NS_HIDDEN_(void) Insert( const char_type* data, index_type pos, size_type length = size_type(-1) ) { Replace(pos, 0, data, length); }
NS_HIDDEN_(void) Insert( const self_type& readable, index_type pos ) { Replace(pos, 0, readable); }
NS_HIDDEN_(void) Cut( index_type cutStart, size_type cutLength ) { Replace(cutStart, cutLength, nsnull, 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(" \t\n\r"); }
NS_HIDDEN_(void) Trim(const char *aSet, PRBool aLeading = PR_TRUE,
PRBool aTrailing = PR_TRUE);
/**
* Compare strings of characters. Return 0 if the characters are equal,
*/
typedef PRInt32 (*ComparatorFunc)(const char_type *a,
const char_type *b,
PRUint32 length);
static NS_HIDDEN_(PRInt32) DefaultComparator(const char_type *a,
const char_type *b,
PRUint32 length);
NS_HIDDEN_(PRBool) Equals( const char_type *other,
ComparatorFunc c = DefaultComparator ) const;
NS_HIDDEN_(PRBool) Equals( const self_type &other,
ComparatorFunc c = DefaultComparator ) const;
/**
* Case-insensitive match this string to a lowercase ASCII string.
*/
NS_HIDDEN_(PRBool) LowerCaseEqualsLiteral(const char *aASCIIString) const;
/**
* Find the first occurence of aStr in this string.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(PRInt32) Find(const self_type& aStr,
ComparatorFunc c = DefaultComparator) const;
/**
* Find an ASCII string within this string.
*
* @return the offset of aStr, or -1 if not found.
*/
NS_HIDDEN_(PRInt32) Find(const char *aStr, PRBool aIgnoreCase = PR_FALSE) 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_(PRInt32) RFindChar(char_type aChar) const;
/**
* Append a string representation of a number.
*/
NS_HIDDEN_(void) AppendInt(int aInt, PRInt32 aRadix = 10);
protected:
// Prevent people from allocating a nsAString directly.
~nsAString() {}
};
class nsACString
{
public:
typedef char char_type;
typedef nsACString self_type;
typedef PRUint32 size_type;
typedef PRUint32 index_type;
/**
* Returns the length, beginning, and end of a string in one operation.
*/
NS_HIDDEN_(PRUint32) BeginReading(const char_type **begin,
const char_type **end = nsnull) const;
NS_HIDDEN_(const char_type*) BeginReading() const;
NS_HIDDEN_(const char_type*) EndReading() const;
/**
* 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.
*/
NS_HIDDEN_(PRUint32) BeginWriting(char_type **begin,
char_type **end = nsnull,
PRUint32 newSize = PR_UINT32_MAX);
NS_HIDDEN_(char_type*) BeginWriting();
NS_HIDDEN_(char_type*) EndWriting();
NS_HIDDEN_(PRBool) SetLength(PRUint32 aLen);
NS_HIDDEN_(size_type) Length() const
{
const char_type* data;
return NS_CStringGetData(*this, &data);
}
NS_HIDDEN_(PRBool) IsEmpty() const
{
return Length() == 0;
}
NS_HIDDEN_(void) Assign(const self_type& aString)
{
NS_CStringCopy(*this, aString);
}
NS_HIDDEN_(void) Assign(const char_type* aData, size_type aLength = PR_UINT32_MAX)
{
NS_CStringSetData(*this, aData, aLength);
}
NS_HIDDEN_(void) Assign(char_type aChar)
{
NS_CStringSetData(*this, &aChar, 1);
}
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 cutStart, size_type cutLength, const char_type* data, size_type length = size_type(-1) )
{
NS_CStringSetDataRange(*this, cutStart, cutLength, data, length);
}
NS_HIDDEN_(void) Replace( index_type cutStart, size_type cutLength, char_type c )
{
Replace(cutStart, cutLength, &c, 1);
}
NS_HIDDEN_(void) Replace( index_type cutStart, size_type cutLength, const self_type& readable )
{
const char_type* data;
PRUint32 dataLen = NS_CStringGetData(readable, &data);
NS_CStringSetDataRange(*this, cutStart, cutLength, data, dataLen);
}
NS_HIDDEN_(void) Append( char_type c ) { Replace(size_type(-1), 0, c); }
NS_HIDDEN_(void) Append( const char_type* data, size_type length = size_type(-1) ) { Replace(size_type(-1), 0, data, length); }
NS_HIDDEN_(void) Append( const self_type& readable ) { Replace(size_type(-1), 0, readable); }
NS_HIDDEN_(self_type&) operator+=( char_type c ) { Append(c); return *this; }
NS_HIDDEN_(self_type&) operator+=( const char_type* data ) { Append(data); return *this; }
NS_HIDDEN_(self_type&) operator+=( const self_type& readable ) { Append(readable); return *this; }
NS_HIDDEN_(void) Insert( char_type c, index_type pos ) { Replace(pos, 0, c); }
NS_HIDDEN_(void) Insert( const char_type* data, index_type pos, size_type length = size_type(-1) ) { Replace(pos, 0, data, length); }
NS_HIDDEN_(void) Insert( const self_type& readable, index_type pos ) { Replace(pos, 0, readable); }
NS_HIDDEN_(void) Cut( index_type cutStart, size_type cutLength ) { Replace(cutStart, cutLength, nsnull, 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(" \t\r\n"); }
NS_HIDDEN_(void) Trim(const char *aSet, PRBool aLeading = PR_TRUE,
PRBool aTrailing = PR_TRUE);
/**
* Compare strings of characters. Return 0 if the characters are equal,
*/
typedef PRInt32 (*ComparatorFunc)(const char_type *a,
const char_type *b,
PRUint32 length);
static NS_HIDDEN_(PRInt32) DefaultComparator(const char_type *a,
const char_type *b,
PRUint32 length);
NS_HIDDEN_(PRBool) Equals( const char_type *other,
ComparatorFunc c = DefaultComparator ) const;
NS_HIDDEN_(PRBool) Equals( const self_type &other,
ComparatorFunc c = DefaultComparator ) const;
/**
* Find the first occurence of aStr in this string.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(PRInt32) Find(const self_type& aStr,
ComparatorFunc c = DefaultComparator) const;
/**
* Find the first occurence of aStr in this string.
*
* @return the offset of aStr, or -1 if not found
*/
NS_HIDDEN_(PRInt32) Find(const char_type *aStr,
ComparatorFunc c = DefaultComparator) const;
NS_HIDDEN_(PRInt32) Find(const char_type *aStr, PRUint32 aLen,
ComparatorFunc c = DefaultComparator) 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_(PRInt32) RFindChar(char_type aChar) const;
/**
* Append a string representation of a number.
*/
NS_HIDDEN_(void) AppendInt(int aInt, PRInt32 aRadix = 10);
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 = PR_UINT32_MAX)
{
NS_StringContainerInit2(*this, aData, aLength, 0);
}
~nsString()
{
NS_StringContainerFinish(*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 = PR_UINT32_MAX)
{
NS_StringContainerFinish(*this);
NS_StringContainerInit2(*this, aData, aLength,
NS_STRING_CONTAINER_INIT_ADOPT);
}
protected:
nsString(const char_type* aData, size_type aLength, PRUint32 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 = PR_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 = PR_UINT32_MAX)
{
NS_CStringContainerFinish(*this);
NS_CStringContainerInit2(*this, aData, aLength,
NS_CSTRING_CONTAINER_INIT_ADOPT);
}
protected:
nsCString(const char_type* aData, size_type aLength, PRUint32 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 = PR_UINT32_MAX)
: nsString(aData, aLength, NS_CSTRING_CONTAINER_INIT_DEPEND)
{}
void Rebind(const char_type* aData, size_type aLength = PR_UINT32_MAX)
{
NS_StringContainerFinish(*this);
NS_StringContainerInit2(*this, aData, aLength,
NS_STRING_CONTAINER_INIT_DEPEND);
}
private:
self_type& operator=(const self_type& aString); // NOT IMPLEMENTED
};
class nsDependentCString : public nsCString
{
public:
typedef nsDependentCString self_type;
nsDependentCString() {}
explicit
nsDependentCString(const char_type* aData, size_type aLength = PR_UINT32_MAX)
: nsCString(aData, aLength, NS_CSTRING_CONTAINER_INIT_DEPEND)
{}
void Rebind(const char_type* aData, size_type aLength = PR_UINT32_MAX)
{
NS_CStringContainerFinish(*this);
NS_CStringContainerInit2(*this, aData, aLength,
NS_CSTRING_CONTAINER_INIT_DEPEND);
}
private:
self_type& operator=(const self_type& aString); // NOT IMPLEMENTED
};
/**
* 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, PRUint32 aLength = PR_UINT32_MAX)
{
NS_CStringToUTF16(nsDependentCString(aData, aLength),
NS_CSTRING_ENCODING_ASCII, *this);
}
private:
self_type& operator=(const self_type& aString); // NOT IMPLEMENTED
};
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, PRUint32 aLength = PR_UINT32_MAX)
{
NS_CStringToUTF16(nsDependentCString(aData, aLength),
NS_CSTRING_ENCODING_UTF8, *this);
}
private:
self_type& operator=(const self_type& aString); // NOT IMPLEMENTED
};
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 PRUnichar* aData, PRUint32 aLength = PR_UINT32_MAX)
{
NS_UTF16ToCString(nsDependentString(aData, aLength),
NS_CSTRING_ENCODING_UTF8, *this);
}
private:
self_type& operator=(const self_type& aString); // NOT IMPLEMENTED
};
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 PRUnichar* aData, PRUint32 aLength = PR_UINT32_MAX)
{
NS_UTF16ToCString(nsDependentString(aData, aLength),
NS_CSTRING_ENCODING_ASCII, *this);
}
private:
self_type& operator=(const self_type& aString); // NOT IMPLEMENTED
};
/**
* literal strings
*
* NOTE: HAVE_CPP_2BYTE_WCHAR_T may be automatically defined for some platforms
* in nscore.h. On other platforms, it may be defined in xpcom-config.h.
* Under GCC, this define should only be set if compiling with -fshort-wchar.
*/
#ifdef HAVE_CPP_2BYTE_WCHAR_T
#define NS_LL(s) L##s
#define NS_MULTILINE_LITERAL_STRING(s) nsDependentString(NS_REINTERPRET_CAST(const nsAString::char_type*, s), PRUint32((sizeof(s)/sizeof(wchar_t))-1))
#define NS_MULTILINE_LITERAL_STRING_INIT(n,s) n(NS_REINTERPRET_CAST(const nsAString::char_type*, s), PRUint32((sizeof(s)/sizeof(wchar_t))-1))
#define NS_NAMED_MULTILINE_LITERAL_STRING(n,s) const nsDependentString n(NS_REINTERPRET_CAST(const nsAString::char_type*, s), PRUint32((sizeof(s)/sizeof(wchar_t))-1))
typedef nsDependentString nsLiteralString;
#else
#define NS_LL(s) s
#define NS_MULTILINE_LITERAL_STRING(s) NS_ConvertASCIItoUTF16(s, PRUint32(sizeof(s)-1))
#define NS_MULTILINE_LITERAL_STRING_INIT(n,s) n(s, PRUint32(sizeof(s)-1))
#define NS_NAMED_MULTILINE_LITERAL_STRING(n,s) const NS_ConvertASCIItoUTF16 n(s, PRUint32(sizeof(s)-1))
typedef NS_ConvertASCIItoUTF16 nsLiteralString;
#endif
/*
* Macro arguments used in concatenation or stringification won't be expanded.
* Therefore, in order for |NS_L(FOO)| to work as expected (which is to expand
* |FOO| before doing whatever |NS_L| needs to do to it) a helper macro needs
* to be inserted in between to allow the macro argument to expand.
* See "3.10.6 Separate Expansion of Macro Arguments" of the CPP manual for a
* more accurate and precise explanation.
*/
#define NS_L(s) NS_LL(s)
#define NS_LITERAL_STRING(s) NS_STATIC_CAST(const nsString&, NS_MULTILINE_LITERAL_STRING(NS_LL(s)))
#define NS_LITERAL_STRING_INIT(n,s) NS_MULTILINE_LITERAL_STRING_INIT(n, NS_LL(s))
#define NS_NAMED_LITERAL_STRING(n,s) NS_NAMED_MULTILINE_LITERAL_STRING(n, NS_LL(s))
#define NS_LITERAL_CSTRING(s) NS_STATIC_CAST(const nsDependentCString&, nsDependentCString(s, PRUint32(sizeof(s)-1)))
#define NS_LITERAL_CSTRING_INIT(n,s) n(s, PRUint32(sizeof(s)-1))
#define NS_NAMED_LITERAL_CSTRING(n,s) const nsDependentCString n(s, PRUint32(sizeof(s)-1))
typedef nsDependentCString nsLiteralCString;
/**
* getter_Copies support
*
* NS_IMETHOD GetBlah(PRUnichar**);
*
* void some_function()
* {
* nsString blah;
* GetBlah(getter_Copies(blah));
* // ...
* }
*/
class nsGetterCopies
{
public:
typedef PRUnichar char_type;
nsGetterCopies(nsString& aStr)
: mString(aStr), mData(nsnull)
{}
~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;
nsCGetterCopies(nsCString& aStr)
: mString(aStr), mData(nsnull)
{}
~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, PRUint32 aLength)
{
NS_StringContainerInit2(*this, aStart, aLength,
NS_STRING_CONTAINER_INIT_DEPEND |
NS_STRING_CONTAINER_INIT_SUBSTRING);
}
nsDependentSubstring(const abstract_string_type& aStr,
PRUint32 aStartPos);
nsDependentSubstring(const abstract_string_type& aStr,
PRUint32 aStartPos, PRUint32 aLength);
void Rebind(const char_type *aStart, PRUint32 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); // NOT IMPLEMENTED
};
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, PRUint32 aLength)
{
NS_CStringContainerInit2(*this, aStart, aLength,
NS_CSTRING_CONTAINER_INIT_DEPEND |
NS_CSTRING_CONTAINER_INIT_SUBSTRING);
}
nsDependentCSubstring(const abstract_string_type& aStr,
PRUint32 aStartPos);
nsDependentCSubstring(const abstract_string_type& aStr,
PRUint32 aStartPos, PRUint32 aLength);
void Rebind(const char_type *aStart, PRUint32 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); // NOT IMPLEMENTED
};
/**
* Various nsDependentC?Substring constructor functions
*/
// PRUnichar
inline const nsDependentSubstring
Substring( const nsAString& str, PRUint32 startPos )
{
return nsDependentSubstring(str, startPos);
}
inline const nsDependentSubstring
Substring( const nsAString& str, PRUint32 startPos, PRUint32 length )
{
return nsDependentSubstring(str, startPos, length);
}
inline const nsDependentSubstring
Substring( const PRUnichar* start, const PRUnichar* end )
{
return nsDependentSubstring(start, end - start);
}
inline const nsDependentSubstring
Substring( const PRUnichar* start, PRUint32 length )
{
return nsDependentSubstring(start, length);
}
inline const nsDependentSubstring
StringHead( const nsAString& str, PRUint32 count )
{
return nsDependentSubstring(str, 0, count);
}
inline const nsDependentSubstring
StringTail( const nsAString& str, PRUint32 count )
{
return nsDependentSubstring(str, str.Length() - count, count);
}
// char
inline const nsDependentCSubstring
Substring( const nsACString& str, PRUint32 startPos )
{
return nsDependentCSubstring(str, startPos);
}
inline const nsDependentCSubstring
Substring( const nsACString& str, PRUint32 startPos, PRUint32 length )
{
return nsDependentCSubstring(str, startPos, length);
}
inline
const nsDependentCSubstring
Substring( const char* start, const char* end )
{
return nsDependentCSubstring(start, end - start);
}
inline
const nsDependentCSubstring
Substring( const char* start, PRUint32 length )
{
return nsDependentCSubstring(start, length);
}
inline const nsDependentCSubstring
StringHead( const nsACString& str, PRUint32 count )
{
return nsDependentCSubstring(str, 0, count);
}
inline const nsDependentCSubstring
StringTail( const nsACString& str, PRUint32 count )
{
return nsDependentCSubstring(str, str.Length() - count, count);
}
inline PRBool
StringBeginsWith(const nsAString& aSource, const nsAString& aSubstring,
nsAString::ComparatorFunc aComparator = nsAString::DefaultComparator)
{
return StringHead(aSource, aSubstring.Length()).
Equals(aSubstring, aComparator);
}
inline PRBool
StringEndsWith(const nsAString& aSource, const nsAString& aSubstring,
nsAString::ComparatorFunc aComparator = nsAString::DefaultComparator)
{
return StringTail(aSource, aSubstring.Length()).
Equals(aSubstring, aComparator);
}
inline PRBool
StringBeginsWith(const nsACString& aSource, const nsACString& aSubstring,
nsACString::ComparatorFunc aComparator = nsACString::DefaultComparator)
{
return StringHead(aSource, aSubstring.Length()).
Equals(aSubstring, aComparator);
}
inline PRBool
StringEndsWith(const nsACString& aSource, const nsACString& aSubstring,
nsACString::ComparatorFunc aComparator = nsACString::DefaultComparator)
{
return 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_(PRUint32)
ToLowerCase(nsACString& aStr);
NS_HIDDEN_(PRUint32)
ToUpperCase(nsACString& aStr);
NS_HIDDEN_(PRUint32)
ToLowerCase(const nsACString& aSrc, nsACString& aDest);
NS_HIDDEN_(PRUint32)
ToUpperCase(const nsACString& aSrc, nsACString& aDest);
/**
* Comparison function for use with nsACString::Equals
*/
NS_HIDDEN_(PRInt32)
CaseInsensitiveCompare(const char *a, const char *b,
PRUint32 length);
/**
* 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 PRUnichar*
ToNewUnicode(const nsAString& aStr)
{
return NS_StringCloneData(aStr);
}
typedef nsString PromiseFlatString;
typedef nsCString PromiseFlatCString;
typedef nsCString nsCAutoString;
typedef nsString nsAutoString;
#endif // nsStringAPI_h__
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