Encoding Encoder::getFileEncoding(const string &filename)
{
try
{
fstream fs;
fs.exceptions(fstream::failbit | fstream::badbit);
fs.open(filename, ios_base::in | ios_base::binary);
fs.seekg(0, fs.end);
int fileLenght = fs.tellg();
fs.seekg(0, fs.beg);
if(fileLenght < 2)
{
fs.close();
return nobom;
}
const int BOMLEN = min(fileLenght, 4);
// reserve buffer
ByteArray bom( new Byte[BOMLEN], default_delete<Byte[]>());
// read file to buffer
fs.read((char*)bom.get(), BOMLEN);
fs.close();
static const char *UTF_16_BE_BOM = "\xFE\xFF";
static const char *UTF_16_LE_BOM = "\xFF\xFE";
static const char *UTF_8_BOM = "\xEF\xBB\xBF";
static const char *UTF_32_BE_BOM = "\x00\x00\xFE\xFF";
static const char *UTF_32_LE_BOM = "\xFF\xFE\x00\x00";
if (memcmp(bom.get(), UTF_8_BOM, 3) == 0)
return u8;
else if (memcmp(bom.get(), UTF_32_LE_BOM, 4) == 0)
return u32le;
else if (memcmp(bom.get(), UTF_32_BE_BOM, 4) == 0)
return u32be;
else if (memcmp(bom.get(), UTF_16_LE_BOM, 2) == 0)
return u16le;
else if (memcmp(bom.get(), UTF_16_BE_BOM, 2) == 0)
return u16be;
return nobom;
}
catch(const exception& e )
{
throw MyEx("Encoder::getFileEncoding() Can't open " + filename + ".\n" + string(e.what()));
}
}
int64_t fact(int n) {
int one = 1;
fprintf(stderr,"--fact arg: %p stackvar: %p\n", &n, &one );
if ( n == 1 ) {
fprintf(stderr,"Throwing exception\n");
throw MyEx(1);
return 1;
}
return n * fact( n - 1 );
}
