CFX_ByteString CPDF_StreamParser::ReadHexString() {
if (!PositionIsInBounds())
return CFX_ByteString();
CFX_ByteTextBuf buf;
bool bFirst = true;
int code = 0;
while (PositionIsInBounds()) {
int ch = m_pBuf[m_Pos++];
if (ch == '>')
break;
if (!std::isxdigit(ch))
continue;
int val = FXSYS_toHexDigit(ch);
if (bFirst) {
code = val * 16;
} else {
code += val;
buf.AppendByte((uint8_t)code);
}
bFirst = !bFirst;
}
if (!bFirst)
buf.AppendChar((char)code);
if (buf.GetLength() > MAX_STRING_LENGTH)
return CFX_ByteString(buf.GetBuffer(), MAX_STRING_LENGTH);
return buf.GetByteString();
}
CFX_ByteString PDF_NameDecode(const CFX_ByteStringC& bstr) {
int size = bstr.GetLength();
const FX_CHAR* pSrc = bstr.GetCStr();
if (!FXSYS_memchr(pSrc, '#', size)) {
return bstr;
}
CFX_ByteString result;
FX_CHAR* pDestStart = result.GetBuffer(size);
FX_CHAR* pDest = pDestStart;
for (int i = 0; i < size; i++) {
if (pSrc[i] == '#' && i < size - 2) {
*pDest++ =
FXSYS_toHexDigit(pSrc[i + 1]) * 16 + FXSYS_toHexDigit(pSrc[i + 2]);
i += 2;
} else {
*pDest++ = pSrc[i];
}
}
result.ReleaseBuffer((FX_STRSIZE)(pDest - pDestStart));
return result;
}
