gecko-dev/xpcom/build/nsXPCOMStrings.cpp

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9.0 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 char16_t* 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) {
if (NS_WARN_IF(aFlags & NS_STRING_CONTAINER_INIT_SUBSTRING)) {
return NS_ERROR_INVALID_ARG;
}
aDataLength = nsCharTraits<char16_t>::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<char16_t*>(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 char16_t** aData,
bool* aTerminated)
{
if (aTerminated) {
*aTerminated = aStr.IsTerminated();
}
*aData = aStr.BeginReading();
return aStr.Length();
}
XPCOM_API(uint32_t)
NS_StringGetMutableData(nsAString& aStr, uint32_t aDataLength,
char16_t** aData)
{
if (aDataLength != UINT32_MAX) {
aStr.SetLength(aDataLength);
if (aStr.Length() != aDataLength) {
*aData = nullptr;
return 0;
}
}
*aData = aStr.BeginWriting();
return aStr.Length();
}
XPCOM_API(char16_t*)
NS_StringCloneData(const nsAString& aStr)
{
return ToNewUnicode(aStr);
}
XPCOM_API(nsresult)
NS_StringSetData(nsAString& aStr, const char16_t* 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 char16_t* 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) {
if (NS_WARN_IF(aFlags & NS_CSTRING_CONTAINER_INIT_SUBSTRING)) {
return NS_ERROR_INVALID_ARG;
}
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();
}
*aData = aStr.BeginReading();
return aStr.Length();
}
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;
}
}
*aData = aStr.BeginWriting();
return aStr.Length();
}
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
}