byte PgfImage::readPgfMagicNumber(BasicIo& iIo)
{
byte b = iIo.getb();
if (iIo.error()) throw Error(14);
if (b < 0x36) // 0x36 = '6'.
{
// Not right Magick version.
#ifdef DEBUG
std::cout << "Exiv2::PgfImage::readMetadata: wrong Magick number\n";
#endif
}
return b;
} // PgfImage::readPgfMagicNumber
int WriteReadSeek(BasicIo &io)
{
byte buf[4096];
const char tester1[] = "this is a little test of MemIo";
const char tester2[] = "Appending this on the end";
const char expect[] = "this is a little teAppending this on the end";
const long insert = 19;
const long len1 = (long)std::strlen(tester1) + 1;
const long len2 = (long)std::strlen(tester2) + 1;
if (io.open() != 0) {
throw Error(9, io.path(), strError());
}
IoCloser closer(io);
if (io.write((byte*)tester1, len1) != len1) {
std::cerr << ": WRS initial write failed\n";
return 2;
}
if (io.size() != len1) {
std::cerr << ": WRS size is not " << len1 << "\n";
return 2;
}
io.seek(-len1, BasicIo::cur);
int c = EOF;
std::memset(buf, -1, sizeof(buf));
for (int i = 0; (c=io.getb()) != EOF; ++i) {
buf[i] = (byte)c;
}
// Make sure we got the null back
if(buf[len1-1] != 0) {
std::cerr << ": WRS missing null terminator 1\n";
return 3;
}
if (strcmp(tester1, (char*)buf) != 0 ) {
std::cerr << ": WRS strings don't match 1\n";
return 4;
}
io.seek(-2, BasicIo::end);
if (io.getb() != 'o') {
std::cerr << ": WRS bad getb o\n";
return 5;
}
io.seek(-2, BasicIo::cur);
if (io.getb() != 'I') {
std::cerr << ": WRS bad getb I\n";
return 6;
}
if (io.putb('O') != 'O') {
std::cerr << ": WRS bad putb\n";
return 7;
}
io.seek(-1, BasicIo::cur);
if (io.getb() != 'O') {
std::cerr << ": WRS bad getb O\n";
return 8;
}
io.seek(insert, BasicIo::beg);
if(io.write((byte*)tester2, len2) != len2) {
std::cerr << ": WRS bad write 1\n";
return 9;
}
// open should seek to beginning
if (io.open() != 0) {
throw Error(9, io.path(), strError());
}
std::memset(buf, -1, sizeof(buf));
if (io.read(buf, sizeof(buf)) != insert + len2) {
std::cerr << ": WRS something went wrong\n";
return 10;
}
// Make sure we got the null back
if(buf[insert + len2 - 1] != 0) {
std::cerr << ": WRS missing null terminator 2\n";
return 11;
}
if (std::strcmp(expect, (char*)buf) != 0 ) {
std::cerr << ": WRS strings don't match 2\n";
return 12;
}
return 0;
}
