0b879a | 2010-06-10 | Arne Goedeke | | //! Error thrown when JSON decode fails.
class DecodeError {
inherit Error.Generic;
constant error_type = "json_decode";
constant is_json_decode_error = 1;
//! The string that failed to be decoded.
string err_str;
//! The failing position in @[err_str].
int err_pos;
protected void create(string err_str, int err_pos, void|string reason, void|array bt) {
this_program::err_str = err_str;
this_program::err_pos = err_pos;
string pre_context = err_pos > 13 ?
sprintf ("...%O", err_str[err_pos - 10..err_pos - 1]) :
err_pos > 0 ?
sprintf ("%O", err_str[..err_pos - 1]) :
"";
string post_context = err_pos < sizeof (err_str) - 14 ?
sprintf ("%O...", err_str[err_pos + 1..err_pos + 10]) :
err_pos + 1 < sizeof (err_str) ?
sprintf ("%O", err_str[err_pos + 1..]) :
"";
err_str = sprintf ("%s->[%c]<-%s", pre_context, err_str[err_pos], post_context);
if (reason)
::create(sprintf("Error decoding JSON at position %d %s: %s.\n",
err_pos, err_str, reason), bt);
else
::create(sprintf("Error decoding JSON at position %d %s\n",
err_pos, err_str), bt);
}
}
void decode_error(string err_str, int err_pos, void|string reason, void|mixed ... args) {
if (sizeof(args)) reason = sprintf(reason, @args);
throw(DecodeError(err_str, err_pos, reason, backtrace()[..<1]));
}
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