gecko-dev/xpcom/build/nsXPCOMStrings.cpp

378 строки
9.0 KiB
C++

/* vim:set ts=2 sw=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsString.h"
#include "nsCharTraits.h"
#include "nsXPCOMStrings.h"
#include "nsNativeCharsetUtils.h"
/* ------------------------------------------------------------------------- */
XPCOM_API(nsresult)
NS_StringContainerInit(nsStringContainer &aContainer)
{
NS_ASSERTION(sizeof(nsStringContainer_base) >= sizeof(nsString),
"nsStringContainer is not large enough");
// use placement new to avoid heap allocating nsString object
new (&aContainer) nsString();
return NS_OK;
}
XPCOM_API(nsresult)
NS_StringContainerInit2(nsStringContainer &aContainer,
const PRUnichar *aData,
uint32_t aDataLength,
uint32_t aFlags)
{
NS_ASSERTION(sizeof(nsStringContainer_base) >= sizeof(nsString),
"nsStringContainer is not large enough");
if (!aData)
{
new (&aContainer) nsString();
}
else
{
if (aDataLength == 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))
{
uint32_t 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(const_cast<PRUnichar *>(aData),
aDataLength, flags);
}
else
{
new (&aContainer) nsString(aData, aDataLength);
}
}
return NS_OK;
}
XPCOM_API(void)
NS_StringContainerFinish(nsStringContainer &aContainer)
{
// call the nsString dtor
reinterpret_cast<nsString *>(&aContainer)->~nsString();
}
/* ------------------------------------------------------------------------- */
XPCOM_API(uint32_t)
NS_StringGetData(const nsAString &aStr, const PRUnichar **aData,
bool *aTerminated)
{
if (aTerminated)
*aTerminated = aStr.IsTerminated();
nsAString::const_iterator begin;
aStr.BeginReading(begin);
*aData = begin.get();
return begin.size_forward();
}
XPCOM_API(uint32_t)
NS_StringGetMutableData(nsAString &aStr, uint32_t aDataLength,
PRUnichar **aData)
{
if (aDataLength != UINT32_MAX) {
aStr.SetLength(aDataLength);
if (aStr.Length() != aDataLength) {
*aData = nullptr;
return 0;
}
}
nsAString::iterator begin;
aStr.BeginWriting(begin);
*aData = begin.get();
return begin.size_forward();
}
XPCOM_API(PRUnichar *)
NS_StringCloneData(const nsAString &aStr)
{
return ToNewUnicode(aStr);
}
XPCOM_API(nsresult)
NS_StringSetData(nsAString &aStr, const PRUnichar *aData, uint32_t aDataLength)
{
aStr.Assign(aData, aDataLength);
return NS_OK; // XXX report errors
}
XPCOM_API(nsresult)
NS_StringSetDataRange(nsAString &aStr,
uint32_t aCutOffset, uint32_t aCutLength,
const PRUnichar *aData, uint32_t aDataLength)
{
if (aCutOffset == UINT32_MAX)
{
// append case
if (aData)
aStr.Append(aData, aDataLength);
return NS_OK; // XXX report errors
}
if (aCutLength == UINT32_MAX)
aCutLength = aStr.Length() - aCutOffset;
if (aData)
{
if (aDataLength == UINT32_MAX)
aStr.Replace(aCutOffset, aCutLength, nsDependentString(aData));
else
aStr.Replace(aCutOffset, aCutLength, Substring(aData, aDataLength));
}
else
aStr.Cut(aCutOffset, aCutLength);
return NS_OK; // XXX report errors
}
XPCOM_API(nsresult)
NS_StringCopy(nsAString &aDest, const nsAString &aSrc)
{
aDest.Assign(aSrc);
return NS_OK; // XXX report errors
}
XPCOM_API(void)
NS_StringSetIsVoid(nsAString &aStr, const bool aIsVoid)
{
aStr.SetIsVoid(aIsVoid);
}
XPCOM_API(bool)
NS_StringGetIsVoid(const nsAString &aStr)
{
return aStr.IsVoid();
}
/* ------------------------------------------------------------------------- */
XPCOM_API(nsresult)
NS_CStringContainerInit(nsCStringContainer &aContainer)
{
NS_ASSERTION(sizeof(nsStringContainer_base) >= sizeof(nsCString),
"nsCStringContainer is not large enough");
// use placement new to avoid heap allocating nsCString object
new (&aContainer) nsCString();
return NS_OK;
}
XPCOM_API(nsresult)
NS_CStringContainerInit2(nsCStringContainer &aContainer,
const char *aData,
uint32_t aDataLength,
uint32_t aFlags)
{
NS_ASSERTION(sizeof(nsStringContainer_base) >= sizeof(nsCString),
"nsStringContainer is not large enough");
if (!aData)
{
new (&aContainer) nsCString();
}
else
{
if (aDataLength == 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))
{
uint32_t 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(const_cast<char *>(aData),
aDataLength, flags);
}
else
{
new (&aContainer) nsCString(aData, aDataLength);
}
}
return NS_OK;
}
XPCOM_API(void)
NS_CStringContainerFinish(nsCStringContainer &aContainer)
{
// call the nsCString dtor
reinterpret_cast<nsCString *>(&aContainer)->~nsCString();
}
/* ------------------------------------------------------------------------- */
XPCOM_API(uint32_t)
NS_CStringGetData(const nsACString &aStr, const char **aData,
bool *aTerminated)
{
if (aTerminated)
*aTerminated = aStr.IsTerminated();
nsACString::const_iterator begin;
aStr.BeginReading(begin);
*aData = begin.get();
return begin.size_forward();
}
XPCOM_API(uint32_t)
NS_CStringGetMutableData(nsACString &aStr, uint32_t aDataLength, char **aData)
{
if (aDataLength != UINT32_MAX) {
aStr.SetLength(aDataLength);
if (aStr.Length() != aDataLength) {
*aData = nullptr;
return 0;
}
}
nsACString::iterator begin;
aStr.BeginWriting(begin);
*aData = begin.get();
return begin.size_forward();
}
XPCOM_API(char *)
NS_CStringCloneData(const nsACString &aStr)
{
return ToNewCString(aStr);
}
XPCOM_API(nsresult)
NS_CStringSetData(nsACString &aStr, const char *aData, uint32_t aDataLength)
{
aStr.Assign(aData, aDataLength);
return NS_OK; // XXX report errors
}
XPCOM_API(nsresult)
NS_CStringSetDataRange(nsACString &aStr,
uint32_t aCutOffset, uint32_t aCutLength,
const char *aData, uint32_t aDataLength)
{
if (aCutOffset == UINT32_MAX)
{
// append case
if (aData)
aStr.Append(aData, aDataLength);
return NS_OK; // XXX report errors
}
if (aCutLength == UINT32_MAX)
aCutLength = aStr.Length() - aCutOffset;
if (aData)
{
if (aDataLength == UINT32_MAX)
aStr.Replace(aCutOffset, aCutLength, nsDependentCString(aData));
else
aStr.Replace(aCutOffset, aCutLength, Substring(aData, aDataLength));
}
else
aStr.Cut(aCutOffset, aCutLength);
return NS_OK; // XXX report errors
}
XPCOM_API(nsresult)
NS_CStringCopy(nsACString &aDest, const nsACString &aSrc)
{
aDest.Assign(aSrc);
return NS_OK; // XXX report errors
}
XPCOM_API(void)
NS_CStringSetIsVoid(nsACString &aStr, const bool aIsVoid)
{
aStr.SetIsVoid(aIsVoid);
}
XPCOM_API(bool)
NS_CStringGetIsVoid(const nsACString &aStr)
{
return aStr.IsVoid();
}
/* ------------------------------------------------------------------------- */
XPCOM_API(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
}
XPCOM_API(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
}