static void format_collection( JsonIn &jsin, JsonOut &jsout, int depth,
std::function<void(JsonIn &, JsonOut &, int, bool )>write_func )
{
if( depth > 1 ) {
// We're backtracking by storing jsin and jsout state before formatting
// and restoring it afterwards if necessary.
int in_start_pos = jsin.tell();
bool ate_seperator = jsin.get_ate_separator();
int out_start_pos = jsout.tell();
bool need_separator = jsout.get_need_separator();
write_func( jsin, jsout, depth, false );
if( jsout.tell() - out_start_pos <= 120 ) {
// Line is short enough, so we're done.
return;
} else {
// Reset jsin and jsout to their initial state,
// and we'll serialize while forcing wrapping.
jsin.seek( in_start_pos );
jsin.set_ate_separator( ate_seperator );
jsout.seek( out_start_pos );
if( need_separator ) {
jsout.set_need_separator();
}
}
}
write_func( jsin, jsout, depth, true );
}
static void format( JsonIn &jsin, JsonOut &jsout, int depth )
{
depth++;
if( jsin.test_array() ) {
format_collection( jsin, jsout, depth, write_array );
} else if( jsin.test_object() ) {
format_collection( jsin, jsout, depth, write_object );
} else if( jsin.test_string() ) {
std::string str = jsin.get_string();
jsout.write( str );
} else if( jsin.test_number() ) {
// Have to introspect into the string to distinguish integers from floats.
// Otherwise they won't serialize correctly.
const int start_pos = jsin.tell();
double num = jsin.get_float();
const int end_pos = jsin.tell();
std::string str_form = jsin.substr( start_pos, end_pos - start_pos );
if( str_form.find( '.' ) == std::string::npos ) {
jsout.write( static_cast<long>( num ) );
} else {
// This is QUITE insane, but as far as I can tell there is NO way to configure
// an ostream to output a float/double meeting two constraints:
// Always emit a decimal point (and single trailing 0 after a bare decimal point).
// Don't emit trailing zeroes otherwise.
std::string double_str = std::to_string( num );
double_str.erase( double_str.find_last_not_of( '0' ) + 1, std::string::npos );
if( double_str.back() == '.' ) {
double_str += "0";
}
jsout.write_separator();
*jsout.get_stream() << double_str;
jsout.set_need_separator();
}
jsin.seek( end_pos );
} else if( jsin.test_bool() ) {
bool tf = jsin.get_bool();
jsout.write( tf );
} else if( jsin.test_null() ) {
jsout.write_null();
} else {
std::cerr << "Encountered unrecognized json element \"";
const int start_pos = jsin.tell();
jsin.skip_value();
const int end_pos = jsin.tell();
for( int i = start_pos; i < end_pos; ++i ) {
jsin.seek( i );
std::cerr << jsin.peek();
}
std::cerr << "\"" << std::endl;
}
}
