gecko-dev/widget/os2/nsOS2Uni.cpp

150 lines
4.9 KiB
C++

/* 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 "nsOS2Uni.h"
#include "nsIServiceManager.h"
#include "nsIPlatformCharset.h"
#include <stdlib.h>
/**********************************************************
OS2Uni
**********************************************************/
nsICharsetConverterManager* OS2Uni::gCharsetManager = nullptr;
struct ConverterInfo
{
uint16_t mCodePage;
const char* mConvName;
nsIUnicodeEncoder* mEncoder;
nsIUnicodeDecoder* mDecoder;
};
#define eCONVERTER_COUNT 17
ConverterInfo gConverterInfo[eCONVERTER_COUNT] =
{
{ 0, "", nullptr, nullptr },
{ 1252, "windows-1252", nullptr, nullptr },
{ 1208, "UTF-8", nullptr, nullptr },
{ 1250, "windows-1250", nullptr, nullptr },
{ 1251, "windows-1251", nullptr, nullptr },
{ 813, "ISO-8859-7", nullptr, nullptr },
{ 1254, "windows-1254", nullptr, nullptr },
{ 864, "IBM864", nullptr, nullptr },
{ 1257, "windows-1257", nullptr, nullptr },
{ 874, "windows-874", nullptr, nullptr },
{ 932, "Shift_JIS", nullptr, nullptr },
{ 943, "Shift_JIS", nullptr, nullptr },
{ 1381, "GB2312", nullptr, nullptr },
{ 1386, "GB2312", nullptr, nullptr },
{ 949, "EUC-KR", nullptr, nullptr },
{ 950, "Big5", nullptr, nullptr },
{ 1361, "x-johab", nullptr, nullptr }
};
nsISupports*
OS2Uni::GetUconvObject(int aCodePage, ConverterRequest aReq)
{
if (gCharsetManager == nullptr) {
CallGetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &gCharsetManager);
}
nsresult rv;
nsISupports* uco = nullptr;
for (int i = 0; i < eCONVERTER_COUNT; i++) {
if (aCodePage == gConverterInfo[i].mCodePage) {
if (gConverterInfo[i].mEncoder == nullptr) {
const char* convname;
nsAutoCString charset;
if (aCodePage == 0) {
nsCOMPtr<nsIPlatformCharset>
plat(do_GetService(NS_PLATFORMCHARSET_CONTRACTID, &rv));
if (NS_SUCCEEDED(rv)) {
plat->GetCharset(kPlatformCharsetSel_FileName, charset);
} else {
// default to IBM850 if this should fail
charset = "IBM850";
}
convname = charset.get();
} else {
convname = gConverterInfo[i].mConvName;
}
rv = gCharsetManager->GetUnicodeEncoderRaw(convname,
&gConverterInfo[i].mEncoder);
gConverterInfo[i].mEncoder->
SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace,
nullptr, '?');
gCharsetManager->GetUnicodeDecoderRaw(convname,
&gConverterInfo[i].mDecoder);
NS_ASSERTION(NS_SUCCEEDED(rv), "Failed to get converter");
}
if (aReq == eConv_Encoder) {
uco = gConverterInfo[i].mEncoder;
} else {
uco = gConverterInfo[i].mDecoder;
}
break;
}
}
return uco;
}
void OS2Uni::FreeUconvObjects()
{
for (int i = 0; i < eCONVERTER_COUNT; i++) {
NS_IF_RELEASE(gConverterInfo[i].mEncoder);
NS_IF_RELEASE(gConverterInfo[i].mDecoder);
}
NS_IF_RELEASE(gCharsetManager);
}
/**********************************************************
WideCharToMultiByte
**********************************************************/
nsresult
WideCharToMultiByte(int aCodePage, const PRUnichar* aSrc,
int32_t aSrcLength, nsAutoCharBuffer& aResult,
int32_t& aResultLength)
{
nsresult rv;
nsISupports* sup = OS2Uni::GetUconvObject(aCodePage, eConv_Encoder);
nsCOMPtr<nsIUnicodeEncoder> uco = do_QueryInterface(sup);
if (NS_FAILED(uco->GetMaxLength(aSrc, aSrcLength, &aResultLength))) {
return NS_ERROR_UNEXPECTED;
}
if (!aResult.SetLength(aResultLength + 1))
return NS_ERROR_OUT_OF_MEMORY;
char* str = aResult.Elements();
rv = uco->Convert(aSrc, &aSrcLength, str, &aResultLength);
aResult[aResultLength] = '\0';
return rv;
}
/**********************************************************
MultiByteToWideChar
**********************************************************/
nsresult
MultiByteToWideChar(int aCodePage, const char* aSrc,
int32_t aSrcLength, nsAutoChar16Buffer& aResult,
int32_t& aResultLength)
{
nsresult rv;
nsISupports* sup = OS2Uni::GetUconvObject(aCodePage, eConv_Decoder);
nsCOMPtr<nsIUnicodeDecoder> uco = do_QueryInterface(sup);
if (NS_FAILED(uco->GetMaxLength(aSrc, aSrcLength, &aResultLength))) {
return NS_ERROR_UNEXPECTED;
}
if (!aResult.SetLength(aResultLength + 1))
return NS_ERROR_OUT_OF_MEMORY;
PRUnichar* str = aResult.Elements();
rv = uco->Convert(aSrc, &aSrcLength, str, &aResultLength);
aResult[aResultLength] = '\0';
return rv;
}