static const char *append_field(QString *outstr, const QError *qerror,
const char *start)
{
QObject *obj;
QDict *qdict;
QString *key_qs;
const char *end, *key;
if (*start != '%')
parse_error(qerror, '%');
start++;
if (*start != '(')
parse_error(qerror, '(');
start++;
end = strchr(start, ')');
if (!end)
parse_error(qerror, ')');
key_qs = qstring_from_substr(start, 0, end - start - 1);
key = qstring_get_str(key_qs);
qdict = qobject_to_qdict(qdict_get(qerror->error, "data"));
obj = qdict_get(qdict, key);
if (!obj) {
qerror_abort(qerror, "key '%s' not found in QDict", key);
}
switch (qobject_type(obj)) {
case QTYPE_QSTRING:
qstring_append(outstr, qdict_get_str(qdict, key));
break;
case QTYPE_QINT:
qstring_append_int(outstr, qdict_get_int(qdict, key));
break;
default:
qerror_abort(qerror, "invalid type '%c'", qobject_type(obj));
}
QDECREF(key_qs);
return ++end;
}
static void qerror_set_data(QError *qerr, const char *fmt, va_list *va)
{
QObject *obj;
obj = qobject_from_jsonv(fmt, va);
if (!obj) {
qerror_abort(qerr, "invalid format '%s'", fmt);
}
if (qobject_type(obj) != QTYPE_QDICT) {
qerror_abort(qerr, "error format is not a QDict '%s'", fmt);
}
qerr->error = qobject_to_qdict(obj);
obj = qdict_get(qerr->error, "class");
if (!obj) {
qerror_abort(qerr, "missing 'class' key in '%s'", fmt);
}
if (qobject_type(obj) != QTYPE_QSTRING) {
qerror_abort(qerr, "'class' key value should be a QString");
}
obj = qdict_get(qerr->error, "data");
if (!obj) {
qerror_abort(qerr, "missing 'data' key in '%s'", fmt);
}
if (qobject_type(obj) != QTYPE_QDICT) {
qerror_abort(qerr, "'data' key value should be a QDICT");
}
}
static void qerror_set_desc(QError *qerr, const char *fmt)
{
int i;
// FIXME: inefficient loop
for (i = 0; qerror_table[i].error_fmt; i++) {
if (strcmp(qerror_table[i].error_fmt, fmt) == 0) {
qerr->entry = &qerror_table[i];
return;
}
}
qerror_abort(qerr, "error format '%s' not found", fmt);
}
/**
* qerror_from_info(): Create a new QError from error information
*
* The information consists of:
*
* - file the file name of where the error occurred
* - linenr the line number of where the error occurred
* - func the function name of where the error occurred
* - fmt JSON printf-like dictionary, there must exist keys 'class' and
* 'data'
* - va va_list of all arguments specified by fmt
*
* Return strong reference.
*/
QError *qerror_from_info(const char *file, int linenr, const char *func,
const char *fmt, va_list *va)
{
QError *qerr;
qerr = qerror_new();
qerr->linenr = linenr;
qerr->file = file;
qerr->func = func;
if (!fmt) {
qerror_abort(qerr, "QDict not specified");
}
qerror_set_data(qerr, fmt, va);
qerror_set_desc(qerr, fmt);
return qerr;
}
static void parse_error(const QError *qerror, int c)
{
qerror_abort(qerror, "expected '%c' in '%s'", c, qerror->entry->desc);
}
