/usr/include/gpt/UnicodeCharBuffer.hpp is in libgportugol-dev 1.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | #ifndef INC_UnicodeCharBuffer_hpp__
#define INC_UnicodeCharBuffer_hpp__
#include <istream>
#include <cassert>
#include <cstdio>
#include <antlr/config.hpp>
#include <antlr/InputBuffer.hpp>
#include <antlr/CharStreamIOException.hpp>
class ANTLR_API UnicodeCharBuffer : public antlr::InputBuffer {
public:
typedef unsigned int char_type; // should be 32 bits!
/// Create a character buffer
UnicodeCharBuffer(std::istream& inp)
: input(inp)
{
// input.exceptions(std::ios_base::badbit|
// std::ios_base::failbit);
}
/// Get the next character from the stream
int getChar()
{
char_type ch = 0;
int inchar = input.get();
if( inchar == EOF )
return -1;
// This is how UTF8 is encoded
// +---------------------------+----------+----------+----------+----------+
// | Unicode scalar | 1st | 2nd | 3th | 4th |
// +---------------------------+----------+----------+----------+----------+
// |00000000 0xxxxxxx | 0xxxxxxx | | | |
// |00000yyy yyxxxxxx | 110yyyyy | 10xxxxxx | | |
// |zzzzyyyy yyxxxxxx | 1110zzzz | 10yyyyyy | 10xxxxxx | |
// |000uuuuu zzzzyyyy yyxxxxxx | 11110uuu | 10uuzzzz | 10yyyyyy | 10xxxxxx |
// +---------------------------+----------+----------+----------+----------+
if( (inchar & 0x80) == 0 )
return inchar;
unsigned int need = 0;
if( (inchar & 0xF8) == 0xF8 )
{
ch = inchar & 7;
need = 3;
}
else if( (inchar & 0xE0) == 0xE0 )
{
ch = inchar & 0xF;
need = 2;
}
else if( (inchar & 0xC0) == 0xC0 )
{
ch = inchar & 0x1F;
need = 1;
}
else
{
assert("Invalid UTF8");
}
while( need )
{
inchar = input.get();
if( inchar == EOF )
assert("Invalid UTF8");
// throw antlr::CharStreamIOException(std::logic_error());
ch <<= 6;
ch += inchar & 0x3F;
need--;
}
return ch;
}
private:
// character source
std::istream& input;
// NOTE: Unimplemented
UnicodeCharBuffer(const UnicodeCharBuffer& other);
UnicodeCharBuffer& operator=(const UnicodeCharBuffer& other);
};
#endif //INC_UnicodeCharBuffer_hpp__
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