//----------------------------------------------------------------------
// Class nsUnicodeDecodeHelper [implementation]
nsresult nsUnicodeDecodeHelper::ConvertByTable(
const char * aSrc,
PRInt32 * aSrcLength,
PRUnichar * aDest,
PRInt32 * aDestLength,
uScanClassID aScanClass,
uShiftInTable * aShiftInTable,
uMappingTable * aMappingTable)
{
const char * src = aSrc;
PRInt32 srcLen = *aSrcLength;
PRUnichar * dest = aDest;
PRUnichar * destEnd = aDest + *aDestLength;
PRUnichar med;
PRInt32 bcr; // byte count for read
nsresult res = NS_OK;
while ((srcLen > 0) && (dest < destEnd)) {
PRBool charFound;
if (aScanClass == uMultibytesCharset) {
NS_ASSERTION(aShiftInTable, "shift table missing");
charFound = uScanShift(aShiftInTable, NULL, (PRUint8 *)src,
reinterpret_cast<PRUint16*>(&med), srcLen,
(PRUint32 *)&bcr);
} else {
charFound = uScan(aScanClass, NULL, (PRUint8 *)src,
reinterpret_cast<PRUint16*>(&med),
srcLen, (PRUint32 *)&bcr);
}
if (!charFound) {
res = NS_OK_UDEC_MOREINPUT;
break;
}
if (!uMapCode((uTable*) aMappingTable, static_cast<PRUint16>(med), reinterpret_cast<PRUint16*>(dest))) {
if (med < 0x20) {
// somehow some table miss the 0x00 - 0x20 part
*dest = med;
} else {
// Unicode replacement value for unmappable chars
*dest = 0xfffd;
}
}
src += bcr;
srcLen -= bcr;
dest++;
}
if ((srcLen > 0) && (res == NS_OK)) res = NS_OK_UDEC_MOREOUTPUT;
*aSrcLength = src - aSrc;
*aDestLength = dest - aDest;
return res;
}
nsresult nsUnicodeDecodeHelper::ConvertByMultiTable(
const char * aSrc,
PRInt32 * aSrcLength,
PRUnichar * aDest,
PRInt32 * aDestLength,
PRInt32 aTableCount,
const uRange * aRangeArray,
uScanClassID * aScanClassArray,
uMappingTable ** aMappingTable)
{
PRUint8 * src = (PRUint8 *)aSrc;
PRInt32 srcLen = *aSrcLength;
PRUnichar * dest = aDest;
PRUnichar * destEnd = aDest + *aDestLength;
PRUnichar med;
PRInt32 bcr; // byte count for read
nsresult res = NS_OK;
PRInt32 i;
while ((srcLen > 0) && (dest < destEnd))
{
PRBool done= PR_FALSE;
PRBool passRangeCheck = PR_FALSE;
PRBool passScan = PR_FALSE;
for (i=0; (!done) && (i<aTableCount); i++)
{
if ((aRangeArray[i].min <= *src) && (*src <= aRangeArray[i].max))
{
passRangeCheck = PR_TRUE;
if (uScan(aScanClassArray[i], NULL, src,
reinterpret_cast<PRUint16*>(&med), srcLen,
(PRUint32 *)&bcr))
{
passScan = PR_TRUE;
done = uMapCode((uTable*) aMappingTable[i],
static_cast<PRUint16>(med),
reinterpret_cast<PRUint16*>(dest));
} // if (uScan ... )
} // if Range
} // for loop
if(passRangeCheck && (! passScan))
{
res = NS_OK_UDEC_MOREINPUT;
break;
}
if(! done)
{
bcr = 1;
if ((PRUint8)*src < 0x20) {
// somehow some table miss the 0x00 - 0x20 part
*dest = *src;
} else if(*src == (PRUint8) 0xa0) {
// handle nbsp
*dest = 0x00a0;
} else {
// we need to decide how many byte we skip. We can use uScan to do this
for (i=0; i<aTableCount; i++)
{
if ((aRangeArray[i].min <= *src) && (*src <= aRangeArray[i].max))
{
if (uScan(aScanClassArray[i], NULL, src,
reinterpret_cast<PRUint16*>(&med), srcLen,
(PRUint32*)&bcr))
{
// match the patten
PRInt32 k;
for(k = 1; k < bcr; k++)
{
if(0 == (src[k] & 0x80))
{ // only skip if all bytes > 0x80
// if we hit bytes <= 0x80, skip only one byte
bcr = 1;
break;
}
}
break;
}
}
}
// treat it as NSBR if bcr == 1 and it is 0xa0
*dest = ((1==bcr)&&(*src == (PRUint8)0xa0 )) ? 0x00a0 : 0xfffd;
}
}
src += bcr;
srcLen -= bcr;
dest++;
} // while
if ((srcLen > 0) && (res == NS_OK)) res = NS_OK_UDEC_MOREOUTPUT;
*aSrcLength = src - (PRUint8 *)aSrc;
*aDestLength = dest - aDest;
return res;
}
nsresult nsUnicodeDecodeHelper::ConvertByMultiTable(
const char * aSrc,
int32_t * aSrcLength,
PRUnichar * aDest,
int32_t * aDestLength,
int32_t aTableCount,
const uRange * aRangeArray,
uScanClassID * aScanClassArray,
uMappingTable ** aMappingTable,
bool aErrorSignal)
{
uint8_t * src = (uint8_t *)aSrc;
int32_t srcLen = *aSrcLength;
PRUnichar * dest = aDest;
PRUnichar * destEnd = aDest + *aDestLength;
PRUnichar med;
int32_t bcr; // byte count for read
nsresult res = NS_OK;
int32_t i;
while ((srcLen > 0) && (dest < destEnd))
{
bool done= false;
bool passRangeCheck = false;
bool passScan = false;
for (i=0; (!done) && (i<aTableCount); i++)
{
if ((aRangeArray[i].min <= *src) && (*src <= aRangeArray[i].max))
{
passRangeCheck = true;
if (uScan(aScanClassArray[i], nullptr, src,
reinterpret_cast<uint16_t*>(&med), srcLen,
(uint32_t *)&bcr))
{
passScan = true;
done = uMapCode((uTable*) aMappingTable[i],
static_cast<uint16_t>(med),
reinterpret_cast<uint16_t*>(dest));
} // if (uScan ... )
} // if Range
} // for loop
if(passRangeCheck && (! passScan))
{
if (res != NS_ERROR_ILLEGAL_INPUT)
res = NS_OK_UDEC_MOREINPUT;
break;
}
if(! done)
{
bcr = 1;
if ((uint8_t)*src < 0x20) {
// somehow some table miss the 0x00 - 0x20 part
*dest = *src;
} else if(*src == (uint8_t) 0xa0) {
// handle nbsp
*dest = 0x00a0;
} else {
// we need to decide how many byte we skip. We can use uScan to do this
for (i=0; i<aTableCount; i++)
{
if ((aRangeArray[i].min <= *src) && (*src <= aRangeArray[i].max))
{
if (uScan(aScanClassArray[i], nullptr, src,
reinterpret_cast<uint16_t*>(&med), srcLen,
(uint32_t*)&bcr))
{
// match the patten
int32_t k;
for(k = 1; k < bcr; k++)
{
if(0 == (src[k] & 0x80))
{ // only skip if all bytes > 0x80
// if we hit bytes <= 0x80, skip only one byte
bcr = 1;
break;
}
}
break;
}
}
}
// treat it as NSBR if bcr == 1 and it is 0xa0
if ((1==bcr)&&(*src == (uint8_t)0xa0 )) {
*dest = 0x00a0;
} else {
if (aErrorSignal) {
res = NS_ERROR_ILLEGAL_INPUT;
break;
}
*dest = 0xfffd;
}
}
}
src += bcr;
srcLen -= bcr;
dest++;
} // while
if ((srcLen > 0) && (res == NS_OK)) res = NS_OK_UDEC_MOREOUTPUT;
*aSrcLength = src - (uint8_t *)aSrc;
*aDestLength = dest - aDest;
return res;
}
