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gecko-dev/xpcom/string/public/nsStringAPI.h

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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>
*
* 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 ***** */
#ifndef nsStringAPI_h__
#define nsStringAPI_h__
/**
* nsStringAPI.h
*
* This file describes a minimal API for working with XPCOM's abstract
* string classes. It divorces the consumer from having any run-time
* dependency on the implementation details of the abstract string types.
*/
// Map frozen functions to private symbol names if not using strict API.
#ifndef MOZILLA_STRICT_API
# define NS_StringContainerInit NS_StringContainerInit_P
# define NS_StringContainerInit2 NS_StringContainerInit2_P
# define NS_StringContainerFinish NS_StringContainerFinish_P
# define NS_StringGetData NS_StringGetData_P
# define NS_StringCloneData NS_StringCloneData_P
# define NS_StringSetData NS_StringSetData_P
# define NS_StringSetDataRange NS_StringSetDataRange_P
# define NS_StringCopy NS_StringCopy_P
# define NS_CStringContainerInit NS_CStringContainerInit_P
# define NS_CStringContainerInit2 NS_CStringContainerInit2_P
# define NS_CStringContainerFinish NS_CStringContainerFinish_P
# define NS_CStringGetData NS_CStringGetData_P
# define NS_CStringCloneData NS_CStringCloneData_P
# define NS_CStringSetData NS_CStringSetData_P
# define NS_CStringSetDataRange NS_CStringSetDataRange_P
# define NS_CStringCopy NS_CStringCopy_P
# define NS_CStringToUTF16 NS_CStringToUTF16_P
# define NS_UTF16ToCString NS_UTF16ToCString_P
#endif
#include "nscore.h"
#if defined( XPCOM_GLUE )
#define NS_STRINGAPI(type) extern "C" NS_HIDDEN_(type)
#elif defined( _IMPL_NS_STRINGAPI )
#define NS_STRINGAPI(type) extern "C" NS_EXPORT type
#else
#define NS_STRINGAPI(type) extern "C" NS_IMPORT type
#endif
/* The base string types */
class nsAString;
class nsACString;
/* ------------------------------------------------------------------------- */
/**
* nsStringContainer
*
* This is an opaque data type that is large enough to hold the canonical
* implementation of nsAString. The binary structure of this class is an
* implementation detail.
*
* The string data stored in a string container is always single fragment
* and may be null-terminated depending on how it is initialized.
*
* Typically, string containers are allocated on the stack for temporary
* use. However, they can also be malloc'd if necessary. In either case,
* a string container is not useful until it has been initialized with a
* call to NS_StringContainerInit. The following example shows how to use
* a string container to call a function that takes a |nsAString &| out-param.
*
* NS_METHOD GetBlah(nsAString &aBlah);
*
* nsresult MyCode()
* {
* nsresult rv;
*
* nsStringContainer sc;
* rv = NS_StringContainerInit(sc);
* if (NS_FAILED(rv))
* return rv;
*
* rv = GetBlah(sc);
* if (NS_SUCCEEDED(rv))
* {
* const PRUnichar *data;
* NS_StringGetData(sc, &data);
* //
* // |data| now points to the result of the GetBlah function
* //
* }
*
* NS_StringContainerFinish(sc);
* return rv;
* }
*
* The following example show how to use a string container to pass a string
* parameter to a function taking a |const nsAString &| in-param.
*
* NS_METHOD SetBlah(const nsAString &aBlah);
*
* nsresult MyCode()
* {
* nsresult rv;
*
* nsStringContainer sc;
* rv = NS_StringContainerInit(sc);
* if (NS_FAILED(rv))
* return rv;
*
* const PRUnichar kData[] = {'x','y','z','\0'};
* rv = NS_StringSetData(sc, kData, sizeof(kData)/2 - 1);
* if (NS_SUCCEEDED(rv))
* rv = SetBlah(sc);
*
* NS_StringContainerFinish(sc);
* return rv;
* }
*/
class nsStringContainer;
/**
* Flags that may be OR'd together to pass to NS_StringContainerInit2:
*/
enum {
/* Data passed into NS_StringContainerInit2 is not copied; instead, the
* string references the passed in data pointer directly. The caller must
* ensure that the data is valid for the lifetime of the string container.
* This flag should not be combined with NS_STRING_CONTAINER_INIT_ADOPT. */
NS_STRING_CONTAINER_INIT_DEPEND = (1 << 1),
/* Data passed into NS_StringContainerInit2 is not copied; instead, the
* string takes ownership over the data pointer. The caller must have
* allocated the data array using the XPCOM memory allocator (nsMemory).
* This flag should not be combined with NS_STRING_CONTAINER_INIT_DEPEND. */
NS_STRING_CONTAINER_INIT_ADOPT = (1 << 2),
/* Data passed into NS_StringContainerInit2 is a substring that is not
* null-terminated. */
NS_STRING_CONTAINER_INIT_SUBSTRING = (1 << 3)
};
/**
* NS_StringContainerInit
*
* @param aContainer string container reference
* @return NS_OK if string container successfully initialized
*
* This function may allocate additional memory for aContainer. When
* aContainer is no longer needed, NS_StringContainerFinish should be called.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_StringContainerInit(nsStringContainer &aContainer);
/**
* NS_StringContainerInit2
*
* @param aContainer string container reference
* @param aData character buffer (may be null)
* @param aDataLength number of characters stored at aData (may pass
* PR_UINT32_MAX if aData is null-terminated)
* @param aFlags flags affecting how the string container is
* initialized. this parameter is ignored when aData
* is null. otherwise, if this parameter is 0, then
* aData is copied into the string.
*
* This function resembles NS_StringContainerInit but provides further
* options that permit more efficient memory usage. When aContainer is
* no longer needed, NS_StringContainerFinish should be called.
*
* NOTE: NS_StringContainerInit2(container, nsnull, 0, 0) is equivalent to
* NS_StringContainerInit(container).
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_StringContainerInit2
(nsStringContainer &aContainer, const PRUnichar *aData = nsnull,
PRUint32 aDataLength = PR_UINT32_MAX, PRUint32 aFlags = 0);
/**
* NS_StringContainerFinish
*
* @param aContainer string container reference
*
* This function frees any memory owned by aContainer.
*
* @status FROZEN
*/
NS_STRINGAPI(void)
NS_StringContainerFinish(nsStringContainer &aContainer);
/* ------------------------------------------------------------------------- */
/**
* NS_StringGetData
*
* This function returns a const character pointer to the string's internal
* buffer, the length of the string, and a boolean value indicating whether
* or not the buffer is null-terminated.
*
* @param aStr abstract string reference
* @param aData out param that will hold the address of aStr's
* internal buffer
* @param aTerminated if non-null, this out param will be set to indicate
* whether or not aStr's internal buffer is null-
* terminated
* @return length of aStr's internal buffer
*
* @status FROZEN
*/
NS_STRINGAPI(PRUint32)
NS_StringGetData
(const nsAString &aStr, const PRUnichar **aData,
PRBool *aTerminated = nsnull);
/**
* NS_StringCloneData
*
* This function returns a null-terminated copy of the string's
* internal buffer.
*
* @param aStr abstract string reference
* @return null-terminated copy of the string's internal buffer
* (it must be free'd using using nsMemory::Free)
*
* @status FROZEN
*/
NS_STRINGAPI(PRUnichar *)
NS_StringCloneData
(const nsAString &aStr);
/**
* NS_StringSetData
*
* This function copies aData into aStr.
*
* @param aStr abstract string reference
* @param aData character buffer
* @param aDataLength number of characters to copy from source string (pass
* PR_UINT32_MAX to copy until end of aData, designated by
* a null character)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr after copying data
* from aData. The behavior depends on the implementation of the abstract
* string, aStr. If aStr is a reference to a nsStringContainer, then its data
* will be null-terminated by this function.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_StringSetData
(nsAString &aStr, const PRUnichar *aData,
PRUint32 aDataLength = PR_UINT32_MAX);
/**
* NS_StringSetDataRange
*
* This function copies aData into a section of aStr. As a result it can be
* used to insert new characters into the string.
*
* @param aStr abstract string reference
* @param aCutOffset starting index where the string's existing data
* is to be overwritten (pass PR_UINT32_MAX to cause
* aData to be appended to the end of aStr, in which
* case the value of aCutLength is ignored).
* @param aCutLength number of characters to overwrite starting at
* aCutOffset (pass PR_UINT32_MAX to overwrite until the
* end of aStr).
* @param aData character buffer (pass null to cause this function
* to simply remove the "cut" range)
* @param aDataLength number of characters to copy from source string (pass
* PR_UINT32_MAX to copy until end of aData, designated by
* a null character)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr after copying data
* from aData. The behavior depends on the implementation of the abstract
* string, aStr. If aStr is a reference to a nsStringContainer, then its data
* will be null-terminated by this function.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_StringSetDataRange
(nsAString &aStr, PRUint32 aCutOffset, PRUint32 aCutLength,
const PRUnichar *aData, PRUint32 aDataLength = PR_UINT32_MAX);
/**
* NS_StringCopy
*
* This function makes aDestStr have the same value as aSrcStr. It is
* provided as an optimization.
*
* @param aDestStr abstract string reference to be modified
* @param aSrcStr abstract string reference containing source string
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aDestStr after copying
* data from aSrcStr. The behavior depends on the implementation of the
* abstract string, aDestStr. If aDestStr is a reference to a
* nsStringContainer, then its data will be null-terminated by this function.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_StringCopy
(nsAString &aDestStr, const nsAString &aSrcStr);
/**
* NS_StringAppendData
*
* This function appends data to the existing value of aStr.
*
* @param aStr abstract string reference to be modified
* @param aData character buffer
* @param aDataLength number of characters to append (pass PR_UINT32_MAX to
* append until a null-character is encountered)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr upon completion.
* The behavior depends on the implementation of the abstract string, aStr.
* If aStr is a reference to a nsStringContainer, then its data will be null-
* terminated by this function.
*/
inline NS_HIDDEN_(nsresult)
NS_StringAppendData(nsAString &aStr, const PRUnichar *aData,
PRUint32 aDataLength = PR_UINT32_MAX)
{
return NS_StringSetDataRange(aStr, PR_UINT32_MAX, 0, aData, aDataLength);
}
/**
* NS_StringInsertData
*
* This function inserts data into the existing value of aStr at the specified
* offset.
*
* @param aStr abstract string reference to be modified
* @param aOffset specifies where in the string to insert aData
* @param aData character buffer
* @param aDataLength number of characters to append (pass PR_UINT32_MAX to
* append until a null-character is encountered)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr upon completion.
* The behavior depends on the implementation of the abstract string, aStr.
* If aStr is a reference to a nsStringContainer, then its data will be null-
* terminated by this function.
*/
inline NS_HIDDEN_(nsresult)
NS_StringInsertData(nsAString &aStr, PRUint32 aOffset, const PRUnichar *aData,
PRUint32 aDataLength = PR_UINT32_MAX)
{
return NS_StringSetDataRange(aStr, aOffset, 0, aData, aDataLength);
}
/**
* NS_StringCutData
*
* This function shortens the existing value of aStr, by removing characters
* at the specified offset.
*
* @param aStr abstract string reference to be modified
* @param aCutOffset specifies where in the string to insert aData
* @param aCutLength number of characters to remove
* @return NS_OK if function succeeded
*/
inline NS_HIDDEN_(nsresult)
NS_StringCutData(nsAString &aStr, PRUint32 aCutOffset, PRUint32 aCutLength)
{
return NS_StringSetDataRange(aStr, aCutOffset, aCutLength, nsnull, 0);
}
/* ------------------------------------------------------------------------- */
/**
* nsCStringContainer
*
* This is an opaque data type that is large enough to hold the canonical
* implementation of nsACString. The binary structure of this class is an
* implementation detail.
*
* The string data stored in a string container is always single fragment
* and may be null-terminated depending on how it is initialized.
*
* @see nsStringContainer for use cases and further documentation.
*/
class nsCStringContainer;
/**
* Flags that may be OR'd together to pass to NS_StringContainerInit2:
*/
enum {
/* Data passed into NS_CStringContainerInit2 is not copied; instead, the
* string references the passed in data pointer directly. The caller must
* ensure that the data is valid for the lifetime of the string container.
* This flag should not be combined with NS_CSTRING_CONTAINER_INIT_ADOPT. */
NS_CSTRING_CONTAINER_INIT_DEPEND = (1 << 1),
/* Data passed into NS_CStringContainerInit2 is not copied; instead, the
* string takes ownership over the data pointer. The caller must have
* allocated the data array using the XPCOM memory allocator (nsMemory).
* This flag should not be combined with NS_CSTRING_CONTAINER_INIT_DEPEND. */
NS_CSTRING_CONTAINER_INIT_ADOPT = (1 << 2),
/* Data passed into NS_CStringContainerInit2 is a substring that is not
* null-terminated. */
NS_CSTRING_CONTAINER_INIT_SUBSTRING = (1 << 3)
};
/**
* NS_CStringContainerInit
*
* @param aContainer string container reference
* @return NS_OK if string container successfully initialized
*
* This function may allocate additional memory for aContainer. When
* aContainer is no longer needed, NS_CStringContainerFinish should be called.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_CStringContainerInit(nsCStringContainer &aContainer);
/**
* NS_CStringContainerInit2
*
* @param aContainer string container reference
* @param aData character buffer (may be null)
* @param aDataLength number of characters stored at aData (may pass
* PR_UINT32_MAX if aData is null-terminated)
* @param aFlags flags affecting how the string container is
* initialized. this parameter is ignored when aData
* is null. otherwise, if this parameter is 0, then
* aData is copied into the string.
*
* This function resembles NS_CStringContainerInit but provides further
* options that permit more efficient memory usage. When aContainer is
* no longer needed, NS_CStringContainerFinish should be called.
*
* NOTE: NS_CStringContainerInit2(container, nsnull, 0, 0) is equivalent to
* NS_CStringContainerInit(container).
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_CStringContainerInit2
(nsCStringContainer &aContainer, const char *aData = nsnull,
PRUint32 aDataLength = PR_UINT32_MAX, PRUint32 aFlags = 0);
/**
* NS_CStringContainerFinish
*
* @param aContainer string container reference
*
* This function frees any memory owned by aContainer.
*
* @status FROZEN
*/
NS_STRINGAPI(void)
NS_CStringContainerFinish(nsCStringContainer &aContainer);
/* ------------------------------------------------------------------------- */
/**
* NS_CStringGetData
*
* This function returns a const character pointer to the string's internal
* buffer, the length of the string, and a boolean value indicating whether
* or not the buffer is null-terminated.
*
* @param aStr abstract string reference
* @param aData out param that will hold the address of aStr's
* internal buffer
* @param aTerminated if non-null, this out param will be set to indicate
* whether or not aStr's internal buffer is null-
* terminated
* @return length of aStr's internal buffer
*
* @status FROZEN
*/
NS_STRINGAPI(PRUint32)
NS_CStringGetData
(const nsACString &aStr, const char **aData,
PRBool *aTerminated = nsnull);
/**
* NS_CStringCloneData
*
* This function returns a null-terminated copy of the string's
* internal buffer.
*
* @param aStr abstract string reference
* @return null-terminated copy of the string's internal buffer
* (it must be free'd using using nsMemory::Free)
*
* @status FROZEN
*/
NS_STRINGAPI(char *)
NS_CStringCloneData
(const nsACString &aStr);
/**
* NS_CStringSetData
*
* This function copies aData into aStr.
*
* @param aStr abstract string reference
* @param aData character buffer
* @param aDataLength number of characters to copy from source string (pass
* PR_UINT32_MAX to copy until end of aData, designated by
* a null character)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr after copying data
* from aData. The behavior depends on the implementation of the abstract
* string, aStr. If aStr is a reference to a nsStringContainer, then its data
* will be null-terminated by this function.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_CStringSetData
(nsACString &aStr, const char *aData,
PRUint32 aDataLength = PR_UINT32_MAX);
/**
* NS_CStringSetDataRange
*
* This function copies aData into a section of aStr. As a result it can be
* used to insert new characters into the string.
*
* @param aStr abstract string reference
* @param aCutOffset starting index where the string's existing data
* is to be overwritten (pass PR_UINT32_MAX to cause
* aData to be appended to the end of aStr, in which
* case the value of aCutLength is ignored).
* @param aCutLength number of characters to overwrite starting at
* aCutOffset (pass PR_UINT32_MAX to overwrite until the
* end of aStr).
* @param aData character buffer (pass null to cause this function
* to simply remove the "cut" range)
* @param aDataLength number of characters to copy from source string (pass
* PR_UINT32_MAX to copy until end of aData, designated by
* a null character)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr after copying data
* from aData. The behavior depends on the implementation of the abstract
* string, aStr. If aStr is a reference to a nsStringContainer, then its data
* will be null-terminated by this function.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_CStringSetDataRange
(nsACString &aStr, PRUint32 aCutOffset, PRUint32 aCutLength,
const char *aData, PRUint32 aDataLength = PR_UINT32_MAX);
/**
* NS_CStringCopy
*
* This function makes aDestStr have the same value as aSrcStr. It is
* provided as an optimization.
*
* @param aDestStr abstract string reference to be modified
* @param aSrcStr abstract string reference containing source string
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aDestStr after copying
* data from aSrcStr. The behavior depends on the implementation of the
* abstract string, aDestStr. If aDestStr is a reference to a
* nsStringContainer, then its data will be null-terminated by this function.
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_CStringCopy
(nsACString &aDestStr, const nsACString &aSrcStr);
/**
* NS_CStringAppendData
*
* This function appends data to the existing value of aStr.
*
* @param aStr abstract string reference to be modified
* @param aData character buffer
* @param aDataLength number of characters to append (pass PR_UINT32_MAX to
* append until a null-character is encountered)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr upon completion.
* The behavior depends on the implementation of the abstract string, aStr.
* If aStr is a reference to a nsStringContainer, then its data will be null-
* terminated by this function.
*/
inline NS_HIDDEN_(nsresult)
NS_CStringAppendData(nsACString &aStr, const char *aData,
PRUint32 aDataLength = PR_UINT32_MAX)
{
return NS_CStringSetDataRange(aStr, PR_UINT32_MAX, 0, aData, aDataLength);
}
/**
* NS_CStringInsertData
*
* This function inserts data into the existing value of aStr at the specified
* offset.
*
* @param aStr abstract string reference to be modified
* @param aOffset specifies where in the string to insert aData
* @param aData character buffer
* @param aDataLength number of characters to append (pass PR_UINT32_MAX to
* append until a null-character is encountered)
* @return NS_OK if function succeeded
*
* This function does not necessarily null-terminate aStr upon completion.
* The behavior depends on the implementation of the abstract string, aStr.
* If aStr is a reference to a nsStringContainer, then its data will be null-
* terminated by this function.
*/
inline NS_HIDDEN_(nsresult)
NS_CStringInsertData(nsACString &aStr, PRUint32 aOffset, const char *aData,
PRUint32 aDataLength = PR_UINT32_MAX)
{
return NS_CStringSetDataRange(aStr, aOffset, 0, aData, aDataLength);
}
/**
* NS_CStringCutData
*
* This function shortens the existing value of aStr, by removing characters
* at the specified offset.
*
* @param aStr abstract string reference to be modified
* @param aCutOffset specifies where in the string to insert aData
* @param aCutLength number of characters to remove
* @return NS_OK if function succeeded
*/
inline NS_HIDDEN_(nsresult)
NS_CStringCutData(nsACString &aStr, PRUint32 aCutOffset, PRUint32 aCutLength)
{
return NS_CStringSetDataRange(aStr, aCutOffset, aCutLength, nsnull, 0);
}
/* ------------------------------------------------------------------------- */
/**
* Encodings that can be used with the following conversion routines.
*/
enum nsCStringEncoding {
/* Conversion between ASCII and UTF-16 assumes that all bytes in the source
* string are 7-bit ASCII and can be inflated to UTF-16 by inserting null
* bytes. Reverse conversion is done by truncating every other byte. The
* conversion may result in loss and/or corruption of information if the
* strings do not strictly contain ASCII data. */
NS_CSTRING_ENCODING_ASCII = 0,
/* Conversion between UTF-8 and UTF-16 is non-lossy. */
NS_CSTRING_ENCODING_UTF8 = 1,
/* Conversion from UTF-16 to the native filesystem charset may result in a
* loss of information. No attempt is made to protect against data loss in
* this case. The native filesystem charset applies to strings passed to
* the "Native" method variants on nsIFile and nsILocalFile. */
NS_CSTRING_ENCODING_NATIVE_FILESYSTEM = 2
};
/**
* NS_CStringToUTF16
*
* This function converts the characters in a nsACString to an array of UTF-16
* characters, in the platform endianness. The result is stored in a nsAString
* object.
*
* @param aSource abstract string reference containing source string
* @param aSrcEncoding character encoding of the source string
* @param aDest abstract string reference to hold the result
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_CStringToUTF16(const nsACString &aSource, nsCStringEncoding aSrcEncoding,
nsAString &aDest);
/**
* NS_UTF16ToCString
*
* This function converts the UTF-16 characters in a nsAString to a single-byte
* encoding. The result is stored in a nsACString object. In some cases this
* conversion may be lossy. In such cases, the conversion may succeed with a
* return code indicating loss of information. The exact behavior is not
* specified at this time.
*
* @param aSource abstract string reference containing source string
* @param aDestEncoding character encoding of the resulting string
* @param aDest abstract string reference to hold the result
*
* @status FROZEN
*/
NS_STRINGAPI(nsresult)
NS_UTF16ToCString(const nsAString &aSource, nsCStringEncoding aDestEncoding,
nsACString &aDest);
/* ------------------------------------------------------------------------- */
/**
* Below we define nsAString and nsACString. The "_external" suffix is an
* implementation detail. nsAString_external is the name of the external
* representation of nsAString from the point of view of the Mozilla codebase.
* To a user of this API, nsAString_external is exactly nsAString.
*
* These classes should be treated as abstract classes with unspecified
* structure. The inline methods are provided as helper functions around the
* C-style API provided above.
*
* Do not try to mix these definitions of nsAString and nsACString with the
* internal definition of these classes from nsAString.h in the Mozilla tree.
*/
#ifdef MOZILLA_STRICT_API
#define nsAString_external nsAString
#define nsACString_external nsACString
#endif
class nsAString_external
{
#ifdef MOZILLA_STRICT_API
public:
typedef PRUnichar char_type;
typedef nsAString_external self_type;
typedef PRUint32 size_type;
typedef PRUint32 index_type;
NS_HIDDEN_(const char_type*) BeginReading() const
{
const char_type *data;
NS_StringGetData(*this, &data);
return data;
}
NS_HIDDEN_(const char_type*) EndReading() const
{
const char_type *data;
PRUint32 len = NS_StringGetData(*this, &data);
return data + len;
}
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); }
#endif // MOZILLA_STRICT_API
private:
void *v;
};
class nsACString_external
{
#ifdef MOZILLA_STRICT_API
public:
typedef char char_type;
typedef nsACString_external self_type;
typedef PRUint32 size_type;
typedef PRUint32 index_type;
NS_HIDDEN_(const char_type*) BeginReading() const
{
const char_type *data;
NS_CStringGetData(*this, &data);
return data;
}
NS_HIDDEN_(const char_type*) EndReading() const
{
const char_type *data;
PRUint32 len = NS_CStringGetData(*this, &data);
return data + len;
}
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); }
#endif // MOZILLA_STRICT_API
private:
void *v;
};
/* ------------------------------------------------------------------------- */
/**
* Below we define nsStringContainer and nsCStringContainer. These classes
* have unspecified structure. In most cases, your code should use
* nsEmbedString instead of these classes; however, if you prefer C-style
* programming, then look no further...
*/
class nsStringContainer : public nsAString_external
{
private:
void *d1;
PRUint32 d2;
void *d3;
public:
nsStringContainer() {} // MSVC6 needs this
};
class nsCStringContainer : public nsACString_external
{
private:
void *d1;
PRUint32 d2;
void *d3;
public:
nsCStringContainer() {} // MSVC6 needs this
};
/* ------------------------------------------------------------------------- */
/**
* Below we define a number of inlined helper classes that make the frozen
* string API easier to use.
*/
#ifdef MOZILLA_STRICT_API
#include "nsDebug.h"
/**
* 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
{
const char_type* data;
NS_StringGetData(*this, &data);
return data;
}
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
{
const char_type* data;
NS_CStringGetData(*this, &data);
return data;
}
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
*/
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 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)
{
const PRUnichar* data;
PRUint32 len = NS_StringGetData(aStr, &data);
NS_StringContainerInit2(*this, data + aStartPos, len - aStartPos,
NS_STRING_CONTAINER_INIT_DEPEND |
NS_STRING_CONTAINER_INIT_SUBSTRING);
}
nsDependentSubstring(const abstract_string_type& aStr,
PRUint32 aStartPos, PRUint32 aLength)
{
const PRUnichar* data;
PRUint32 len = NS_StringGetData(aStr, &data);
NS_ASSERTION(aStartPos + aLength <= len, "bad length");
NS_StringContainerInit2(*this, data + aStartPos, aLength,
NS_STRING_CONTAINER_INIT_DEPEND |
NS_STRING_CONTAINER_INIT_SUBSTRING);
}
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 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)
{
const char* data;
PRUint32 len = NS_CStringGetData(aStr, &data);
NS_CStringContainerInit2(*this, data + aStartPos, len - aStartPos,
NS_CSTRING_CONTAINER_INIT_DEPEND |
NS_CSTRING_CONTAINER_INIT_SUBSTRING);
}
nsDependentCSubstring(const abstract_string_type& aStr,
PRUint32 aStartPos, PRUint32 aLength)
{
const char* data;
PRUint32 len = NS_CStringGetData(aStr, &data);
NS_ASSERTION(aStartPos + aLength <= len, "bad length");
NS_CStringContainerInit2(*this, data + aStartPos, aLength,
NS_CSTRING_CONTAINER_INIT_DEPEND |
NS_CSTRING_CONTAINER_INIT_SUBSTRING);
}
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);
}
/*
* Canonical empty strings
*/
#define EmptyCString() nsCString()
#define EmptyString() nsString()
#endif // MOZILLA_STRICT_API
#endif // nsStringAPI_h__
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