зеркало из https://github.com/mozilla/pjs.git
Clean up and preparing for auto detection.
This commit is contained in:
nhotta%netscape.com
Родитель
ba8cba6747
Коммит
eb13ecf4a0
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@ -337,7 +337,10 @@ static PRInt32 INTL_ConvertCharset(const char* from_charset, const char* to_char
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static PRBool NeedCharsetConversion(const char* from_charset, const char* to_charset)
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{
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if (!PL_strcasecmp(from_charset, to_charset)) {
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if (nsnull == from_charset || nsnull == to_charset ||
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'\0' == *from_charset || '\0' == *to_charset)
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return PR_FALSE;
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else if (!PL_strcasecmp(from_charset, to_charset)) {
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return PR_FALSE;
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}
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else if ((!PL_strcasecmp(from_charset, "us-ascii") && !PL_strcasecmp(to_charset, "utf-8")) ||
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@ -1201,77 +1204,82 @@ static PRInt32 INTL_ConvertCharset(const char* from_charset, const char* to_char
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const char* inBuffer, const PRInt32 inLength,
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char** outBuffer)
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{
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char *dstPtr = nsnull;
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PRInt32 dstLength = 0;
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nsIUnicodeDecoder* decoder = nsnull;
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nsIUnicodeEncoder* encoder = nsnull;
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nsresult res;
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*outBuffer = nsnull;
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if (nsnull == from_charset || nsnull == to_charset ||
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'\0' == *from_charset || '\0' == *to_charset || nsnull == inBuffer)
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return -1;
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// Set up charset converters.
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NS_WITH_SERVICE(nsICharsetConverterManager, ccm, kCharsetConverterManagerCID, &res);
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if (NS_SUCCEEDED(res) && (nsnull != ccm)) {
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nsString aCharset(from_charset);
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nsIUnicodeDecoder* decoder = nsnull;
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nsString aCharset;
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// get decoder (conv to unicode)
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aCharset.SetString(from_charset);
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res = ccm->GetUnicodeDecoder(&aCharset, &decoder);
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if (NS_FAILED(res)) {
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decoder = nsnull;
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}
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// get encoder (conv from unicode)
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aCharset.SetString(to_charset);
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res = ccm->GetUnicodeEncoder(&aCharset, &encoder);
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if (NS_FAILED(res)) {
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encoder = nsnull;
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}
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// error, no conversion, copy the original
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if (nsnull == decoder || nsnull == encoder) {
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*outBuffer = PL_strdup(inBuffer);
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return (nsnull != *outBuffer) ? 0 : -1;
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}
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}
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else
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return -1;
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// Do the actual convertions.
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PRUnichar *unichars;
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PRInt32 unicharLength;
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// convert to unicode
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res = ccm->GetUnicodeDecoder(&aCharset, &decoder);
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if(NS_SUCCEEDED(res) && (nsnull != decoder)) {
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PRInt32 srcLen = inLength;
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PRInt32 dstLength = 0;
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char *dstPtr = nsnull;
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res = decoder->Length(inBuffer, 0, srcLen, &unicharLength);
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// temporary buffer to hold unicode string
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unichars = new PRUnichar[unicharLength];
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if (unichars != nsnull) {
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if (unichars == nsnull) {
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res = NS_ERROR_OUT_OF_MEMORY;
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}
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else {
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// convert to unicode
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res = decoder->Convert(unichars, 0, &unicharLength, inBuffer, 0, &srcLen);
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// convert from unicode
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nsIUnicodeEncoder* encoder = nsnull;
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aCharset.SetString(to_charset);
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res = ccm->GetUnicodeEncoder(&aCharset, &encoder);
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if(NS_SUCCEEDED(res) && (nsnull != encoder)) {
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res = encoder->GetMaxLength(unichars, unicharLength, &dstLength);
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// allocale an output buffer
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dstPtr = (char *) PR_Malloc(dstLength + 1);
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if (dstPtr != nsnull) {
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PRInt32 originalLength = unicharLength;
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PRInt32 estimatedLength = dstLength;
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if (dstPtr == nsnull) {
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res = NS_ERROR_OUT_OF_MEMORY;
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}
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else {
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// convert from unicode
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res = encoder->Convert(unichars, &unicharLength, dstPtr, &dstLength);
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// buffer was too small, reallocate buffer and try again
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if (unicharLength < originalLength) {
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PR_Free(dstPtr);
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unicharLength = originalLength;
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dstLength = estimatedLength * 4; // estimation was not correct
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dstPtr = (char *) PR_Malloc(dstLength + 1);
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if (dstPtr != nsnull) {
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res = encoder->Convert(unichars, &unicharLength, dstPtr, &dstLength);
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if (unicharLength < originalLength) {
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PR_FREEIF(dstPtr);
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dstPtr = PL_strdup(inBuffer); // no conversion
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dstLength = PL_strlen(dstPtr);
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}
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}
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}
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if (dstPtr != nsnull) {
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dstPtr[dstLength] = '\0';
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}
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}
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NS_IF_RELEASE(encoder);
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*outBuffer = dstPtr; // set the result string
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}
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delete [] unichars;
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}
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NS_IF_RELEASE(decoder);
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}
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}
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// set the results
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*outBuffer = dstPtr;
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NS_IF_RELEASE(decoder);
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NS_IF_RELEASE(encoder);
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return NS_SUCCEEDED(res) ? 0 : -1;
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}
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static PRInt32 INTL_ConvertToUnicode(const char* from_charset, const char* aBuffer, const PRInt32 aLength,
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void** uniBuffer, PRInt32* uniLength)
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{
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@ -1344,6 +1352,140 @@ static PRInt32 INTL_ConvertFromUnicode(const char* to_charset, const void* uniBu
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}
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return NS_SUCCEEDED(res) ? 0 : -1;
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}
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////////////////////////////////////////////////////////////////////////////////
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class MimeCharsetConverterClass {
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public:
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MimeCharsetConverterClass();
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virtual ~MimeCharsetConverterClass();
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PRInt32 Initialize(const char* from_charset, const char* to_charset,
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const PRBool autoDetect=PR_FALSE, const PRInt32 maxNumCharsDetect=-1);
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PRInt32 Convert(const char* inBuffer, const PRInt32 inLength, char** outBuffer, PRInt32* outLength);
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nsIUnicodeDecoder * GetUnicodeDecoder() {return (mAutoDetect && NULL != mDecoderDetected) ? mDecoderDetected : mDecoder;}
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nsIUnicodeEncoder * GetUnicodeEncoder() {return mEncoder;}
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private:
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nsIUnicodeDecoder *mDecoder; // decoder (convert to unicode)
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nsIUnicodeEncoder *mEncoder; // encoder (convert from unicode)
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nsIUnicodeDecoder *mDecoderDetected; // decoder of detected charset (after when auto detection succeeded)
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PRInt32 mMaxNumCharsDetect; // maximum number of characters in bytes to abort auto detection
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// (-1 for no limit)
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PRInt32 mNumChars; // accumulated number of characters converted in bytes
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PRBool mAutoDetect; // true if apply auto detection
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};
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MimeCharsetConverterClass::MimeCharsetConverterClass()
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{
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mDecoder = NULL;
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mEncoder = NULL;
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mDecoderDetected = NULL;
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mMaxNumCharsDetect = -1;
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mNumChars = 0;
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mAutoDetect = PR_FALSE;
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}
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MimeCharsetConverterClass::~MimeCharsetConverterClass()
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{
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NS_IF_RELEASE(mDecoder);
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NS_IF_RELEASE(mEncoder);
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NS_IF_RELEASE(mDecoderDetected);
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}
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PRInt32 MimeCharsetConverterClass::Initialize(const char* from_charset, const char* to_charset,
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const PRBool autoDetect, const PRInt32 maxNumCharsDetect)
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{
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nsresult res;
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// Set up charset converters.
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NS_WITH_SERVICE(nsICharsetConverterManager, ccm, kCharsetConverterManagerCID, &res);
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if (NS_SUCCEEDED(res) && (nsnull != ccm)) {
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nsString aCharset;
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// create a decoder (conv to unicode)
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aCharset.SetString(from_charset);
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res = ccm->GetUnicodeDecoder(&aCharset, &mDecoder);
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if (NS_FAILED(res)) {
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return -1;
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}
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// create an encoder (conv from unicode)
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aCharset.SetString(to_charset);
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res = ccm->GetUnicodeEncoder(&aCharset, &mEncoder);
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if (NS_FAILED(res)) {
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return -1;
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}
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}
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else {
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return -1;
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}
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mAutoDetect = autoDetect;
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mMaxNumCharsDetect = maxNumCharsDetect;
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return 0;
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}
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PRInt32 MimeCharsetConverterClass::Convert(const char* inBuffer, const PRInt32 inLength, char** outBuffer, PRInt32* outLength)
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{
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if (NULL == mDecoder || NULL == mEncoder) {
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*outBuffer = PL_strdup(inBuffer);
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if (*outBuffer != nsnull) {
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*outLength = PL_strlen(*outBuffer);
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return 0;
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}
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return -1;
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}
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nsIUnicodeDecoder* decoder = mDecoder;
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nsIUnicodeEncoder* encoder = mEncoder;
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// try auto detection for this string
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if (mAutoDetect && mMaxNumCharsDetect < mNumChars) {
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}
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// update the total so far
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mNumChars += inLength;
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// do the conversion
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nsresult res;
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PRUnichar *unichars;
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PRInt32 unicharLength;
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PRInt32 srcLen = inLength;
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PRInt32 dstLength = 0;
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char *dstPtr;
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res = decoder->Length(inBuffer, 0, srcLen, &unicharLength);
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// allocate temporary buffer to hold unicode string
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unichars = new PRUnichar[unicharLength];
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if (unichars == nsnull) {
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res = NS_ERROR_OUT_OF_MEMORY;
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}
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else {
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// convert to unicode
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res = decoder->Convert(unichars, 0, &unicharLength, inBuffer, 0, &srcLen);
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if (NS_SUCCEEDED(res)) {
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res = encoder->GetMaxLength(unichars, unicharLength, &dstLength);
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// allocale an output buffer
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dstPtr = (char *) PR_Malloc(dstLength + 1);
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if (dstPtr == nsnull) {
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res = NS_ERROR_OUT_OF_MEMORY;
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}
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else {
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// convert from unicode
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res = encoder->Convert(unichars, &unicharLength, dstPtr, &dstLength);
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if (NS_SUCCEEDED(res)) {
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dstPtr[dstLength] = '\0';
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*outBuffer = dstPtr; // set the result string
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*outLength = dstLength;
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}
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}
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}
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delete [] unichars;
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}
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return NS_SUCCEEDED(res) ? 0 : -1;
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}
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////////////////////////////////////////////////////////////////////////////////
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// BEGIN PUBLIC INTERFACE
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extern "C" {
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@ -1393,10 +1535,21 @@ PRInt32 MIME_ConvertCharset(const char* from_charset, const char* to_charset,
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return -1;
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}
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}
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#if 0
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PRInt32 res = INTL_ConvertCharset(from_charset, to_charset, inBuffer, inLength, outBuffer);
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if (res == 0) {
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*outLength = PL_strlen(*outBuffer);
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}
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#else
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PRInt32 res;
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MimeCharsetConverterClass aMimeCharsetConverterClass;
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res = aMimeCharsetConverterClass.Initialize(from_charset, to_charset, PR_FALSE, -1);
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if (res != -1) {
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res = aMimeCharsetConverterClass.Convert(inBuffer, inLength, outBuffer, outLength);
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}
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#endif
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return res;
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}
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