Hello,
I'm trying to parse a PDF document to extract all the text. For the array type
I check each element for its type and I only consider the array elements that
contain either a string or a hexstring.
For the strings I retrieve the value with textArray.GetString().GetStringUtf8()
which works just fine. But, for the hexstring I get weird results in the
buffer. To investigate the content of the buffer I used the following piece of
code:
else if ( textArray[i].IsHexString() )
{
char * ptrHexString = static_cast<char *>( malloc( sizeof(char) * (
textArray[i].GetString().GetLength() + 2 ) ) );
memcpy( ptrHexString, textArray[i].GetString().GetString(),
textArray[i].GetString().GetLength() );
for ( int strIndex = 0; strIndex <
static_cast<int>(textArray[i].GetString().GetLength()); strIndex++ )
{
cout << setw(2) << setfill('0') << dec << strIndex << ": " << hex <<
setw(2) << setfill('0') << static_cast<int>(ptrHexString[strIndex])
<< " " <<
static_cast<char>(ptrHexString[strIndex] + 0x1d) << endl;
}
free( ptrHexString );
}
This displays something like:
00: 00
01: 4c i
02: 00
03: 51 n
04: 00
05: 57 t
06: 00
07: 55 r
08: 00
09: 52 o
10: 00
11: 47 d
12: 00
13: 58 u
14: 00
15: 46 c
16: 00
17: 46 c
18: 00
19: 4c i
I looks like a two byte encoding (first byte 0x00), but note that I had to add
0x1d to the actual byte to get the character I'm expecting (here the text
"introduci").
Any idea what I could have done wrong?
The document that I use to test displays correctly in Acrobat Reader.
- Jo
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