RetroZilla/xpcom/build/nsStringAPI.cpp

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2015-10-21 05:03:22 +02:00
/* 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 ***** */
#include "nsString.h"
#include "nsCharTraits.h"
#include "nsStringAPI.h"
#include "nsNativeCharsetUtils.h"
/* ------------------------------------------------------------------------- */
NS_STRINGAPI(nsresult)
NS_StringContainerInit(nsStringContainer &aContainer)
{
NS_ASSERTION(sizeof(nsStringContainer) >= sizeof(nsString),
"nsStringContainer is not large enough");
// use placement new to avoid heap allocating nsString object
new (&aContainer) nsString();
return NS_OK;
}
NS_STRINGAPI(nsresult)
NS_StringContainerInit2(nsStringContainer &aContainer,
const PRUnichar *aData,
PRUint32 aDataLength,
PRUint32 aFlags)
{
NS_ASSERTION(sizeof(nsStringContainer) >= sizeof(nsString),
"nsStringContainer is not large enough");
if (!aData)
{
new (&aContainer) nsString();
}
else
{
if (aDataLength == PR_UINT32_MAX)
{
NS_ENSURE_ARG(!(aFlags & NS_STRING_CONTAINER_INIT_SUBSTRING));
aDataLength = nsCharTraits<PRUnichar>::length(aData);
}
if (aFlags & (NS_STRING_CONTAINER_INIT_DEPEND |
NS_STRING_CONTAINER_INIT_ADOPT))
{
PRUint32 flags;
if (aFlags & NS_STRING_CONTAINER_INIT_SUBSTRING)
flags = nsSubstring::F_NONE;
else
flags = nsSubstring::F_TERMINATED;
if (aFlags & NS_STRING_CONTAINER_INIT_ADOPT)
flags |= nsSubstring::F_OWNED;
new (&aContainer) nsSubstring(NS_CONST_CAST(PRUnichar *, aData),
aDataLength, flags);
}
else
{
new (&aContainer) nsString(aData, aDataLength);
}
}
return NS_OK;
}
NS_STRINGAPI(void)
NS_StringContainerFinish(nsStringContainer &aContainer)
{
// call the nsString dtor
NS_REINTERPRET_CAST(nsString *, &aContainer)->~nsString();
}
/* ------------------------------------------------------------------------- */
NS_STRINGAPI(PRUint32)
NS_StringGetData(const nsAString &aStr, const PRUnichar **aData,
PRBool *aTerminated)
{
if (aTerminated)
*aTerminated = aStr.IsTerminated();
nsAString::const_iterator begin;
aStr.BeginReading(begin);
*aData = begin.get();
return begin.size_forward();
}
NS_STRINGAPI(PRUint32)
NS_StringGetMutableData(nsAString &aStr, PRUint32 aDataLength,
PRUnichar **aData)
{
if (aDataLength != PR_UINT32_MAX) {
aStr.SetLength(aDataLength);
if (aStr.Length() != aDataLength) {
*aData = nsnull;
return 0;
}
}
nsAString::iterator begin;
aStr.BeginWriting(begin);
*aData = begin.get();
return begin.size_forward();
}
NS_STRINGAPI(PRUnichar *)
NS_StringCloneData(const nsAString &aStr)
{
return ToNewUnicode(aStr);
}
NS_STRINGAPI(nsresult)
NS_StringSetData(nsAString &aStr, const PRUnichar *aData, PRUint32 aDataLength)
{
aStr.Assign(aData, aDataLength);
return NS_OK; // XXX report errors
}
NS_STRINGAPI(nsresult)
NS_StringSetDataRange(nsAString &aStr,
PRUint32 aCutOffset, PRUint32 aCutLength,
const PRUnichar *aData, PRUint32 aDataLength)
{
if (aCutOffset == PR_UINT32_MAX)
{
// append case
if (aData)
aStr.Append(aData, aDataLength);
return NS_OK; // XXX report errors
}
if (aCutLength == PR_UINT32_MAX)
aCutLength = aStr.Length() - aCutOffset;
if (aData)
{
if (aDataLength == PR_UINT32_MAX)
aStr.Replace(aCutOffset, aCutLength, nsDependentString(aData));
else
aStr.Replace(aCutOffset, aCutLength, Substring(aData, aData + aDataLength));
}
else
aStr.Cut(aCutOffset, aCutLength);
return NS_OK; // XXX report errors
}
NS_STRINGAPI(nsresult)
NS_StringCopy(nsAString &aDest, const nsAString &aSrc)
{
aDest.Assign(aSrc);
return NS_OK; // XXX report errors
}
/* ------------------------------------------------------------------------- */
NS_STRINGAPI(nsresult)
NS_CStringContainerInit(nsCStringContainer &aContainer)
{
NS_ASSERTION(sizeof(nsCStringContainer) >= sizeof(nsCString),
"nsCStringContainer is not large enough");
// use placement new to avoid heap allocating nsCString object
new (&aContainer) nsCString();
return NS_OK;
}
NS_STRINGAPI(nsresult)
NS_CStringContainerInit2(nsCStringContainer &aContainer,
const char *aData,
PRUint32 aDataLength,
PRUint32 aFlags)
{
NS_ASSERTION(sizeof(nsCStringContainer) >= sizeof(nsCString),
"nsStringContainer is not large enough");
if (!aData)
{
new (&aContainer) nsCString();
}
else
{
if (aDataLength == PR_UINT32_MAX)
{
NS_ENSURE_ARG(!(aFlags & NS_CSTRING_CONTAINER_INIT_SUBSTRING));
aDataLength = nsCharTraits<char>::length(aData);
}
if (aFlags & (NS_CSTRING_CONTAINER_INIT_DEPEND |
NS_CSTRING_CONTAINER_INIT_ADOPT))
{
PRUint32 flags;
if (aFlags & NS_CSTRING_CONTAINER_INIT_SUBSTRING)
flags = nsCSubstring::F_NONE;
else
flags = nsCSubstring::F_TERMINATED;
if (aFlags & NS_CSTRING_CONTAINER_INIT_ADOPT)
flags |= nsCSubstring::F_OWNED;
new (&aContainer) nsCSubstring(NS_CONST_CAST(char *, aData),
aDataLength, flags);
}
else
{
new (&aContainer) nsCString(aData, aDataLength);
}
}
return NS_OK;
}
NS_STRINGAPI(void)
NS_CStringContainerFinish(nsCStringContainer &aContainer)
{
// call the nsCString dtor
NS_REINTERPRET_CAST(nsCString *, &aContainer)->~nsCString();
}
/* ------------------------------------------------------------------------- */
NS_STRINGAPI(PRUint32)
NS_CStringGetData(const nsACString &aStr, const char **aData,
PRBool *aTerminated)
{
if (aTerminated)
*aTerminated = aStr.IsTerminated();
nsACString::const_iterator begin;
aStr.BeginReading(begin);
*aData = begin.get();
return begin.size_forward();
}
NS_STRINGAPI(PRUint32)
NS_CStringGetMutableData(nsACString &aStr, PRUint32 aDataLength, char **aData)
{
if (aDataLength != PR_UINT32_MAX) {
aStr.SetLength(aDataLength);
if (aStr.Length() != aDataLength) {
*aData = nsnull;
return 0;
}
}
nsACString::iterator begin;
aStr.BeginWriting(begin);
*aData = begin.get();
return begin.size_forward();
}
NS_STRINGAPI(char *)
NS_CStringCloneData(const nsACString &aStr)
{
return ToNewCString(aStr);
}
NS_STRINGAPI(nsresult)
NS_CStringSetData(nsACString &aStr, const char *aData, PRUint32 aDataLength)
{
aStr.Assign(aData, aDataLength);
return NS_OK; // XXX report errors
}
NS_STRINGAPI(nsresult)
NS_CStringSetDataRange(nsACString &aStr,
PRUint32 aCutOffset, PRUint32 aCutLength,
const char *aData, PRUint32 aDataLength)
{
if (aCutOffset == PR_UINT32_MAX)
{
// append case
if (aData)
aStr.Append(aData, aDataLength);
return NS_OK; // XXX report errors
}
if (aCutLength == PR_UINT32_MAX)
aCutLength = aStr.Length() - aCutOffset;
if (aData)
{
if (aDataLength == PR_UINT32_MAX)
aStr.Replace(aCutOffset, aCutLength, nsDependentCString(aData));
else
aStr.Replace(aCutOffset, aCutLength, Substring(aData, aData + aDataLength));
}
else
aStr.Cut(aCutOffset, aCutLength);
return NS_OK; // XXX report errors
}
NS_STRINGAPI(nsresult)
NS_CStringCopy(nsACString &aDest, const nsACString &aSrc)
{
aDest.Assign(aSrc);
return NS_OK; // XXX report errors
}
/* ------------------------------------------------------------------------- */
NS_STRINGAPI(nsresult)
NS_CStringToUTF16(const nsACString &aSrc,
nsCStringEncoding aSrcEncoding,
nsAString &aDest)
{
switch (aSrcEncoding)
{
case NS_CSTRING_ENCODING_ASCII:
CopyASCIItoUTF16(aSrc, aDest);
break;
case NS_CSTRING_ENCODING_UTF8:
CopyUTF8toUTF16(aSrc, aDest);
break;
case NS_CSTRING_ENCODING_NATIVE_FILESYSTEM:
NS_CopyNativeToUnicode(aSrc, aDest);
break;
default:
return NS_ERROR_NOT_IMPLEMENTED;
}
return NS_OK; // XXX report errors
}
NS_STRINGAPI(nsresult)
NS_UTF16ToCString(const nsAString &aSrc,
nsCStringEncoding aDestEncoding,
nsACString &aDest)
{
switch (aDestEncoding)
{
case NS_CSTRING_ENCODING_ASCII:
LossyCopyUTF16toASCII(aSrc, aDest);
break;
case NS_CSTRING_ENCODING_UTF8:
CopyUTF16toUTF8(aSrc, aDest);
break;
case NS_CSTRING_ENCODING_NATIVE_FILESYSTEM:
NS_CopyUnicodeToNative(aSrc, aDest);
break;
default:
return NS_ERROR_NOT_IMPLEMENTED;
}
return NS_OK; // XXX report errors
}