Archipelago » qemu

/*

 * QEMU Error Objects

 *

 * Copyright IBM, Corp. 2011

 *

 * Authors:

 *  Anthony Liguori   <aliguori@us.ibm.com>

 *

 * This work is licensed under the terms of the GNU LGPL, version 2.  See

 * the COPYING.LIB file in the top-level directory.

 */

#include "error.h"

#include "error_int.h"

#include "qemu-objects.h"

#include "qerror.h"

#include <assert.h>

struct Error

{

    QDict *obj;

    const char *fmt;

    char *msg;

};

void error_set(Error **errp, const char *fmt, ...)

{

    Error *err;

    va_list ap;

    if (errp == NULL) {

        return;

    }

    err = qemu_mallocz(sizeof(*err));

    va_start(ap, fmt);

    err->obj = qobject_to_qdict(qobject_from_jsonv(fmt, &ap));

    va_end(ap);

    err->fmt = fmt;

    *errp = err;

}

bool error_is_set(Error **errp)

{

    return (errp && *errp);

}

const char *error_get_pretty(Error *err)

{

    if (err->msg == NULL) {

        QString *str;

        str = qerror_format(err->fmt, err->obj);

        err->msg = qemu_strdup(qstring_get_str(str));

        QDECREF(str);

    }

    return err->msg;

}

const char *error_get_field(Error *err, const char *field)

{

    if (strcmp(field, "class") == 0) {

        return qdict_get_str(err->obj, field);

    } else {

        QDict *dict = qdict_get_qdict(err->obj, "data");

        return qdict_get_str(dict, field);

    }

}

QDict *error_get_data(Error *err)

{

    QDict *data = qdict_get_qdict(err->obj, "data");

    QINCREF(data);

    return data;

}

void error_set_field(Error *err, const char *field, const char *value)

{

    QDict *dict = qdict_get_qdict(err->obj, "data");

    return qdict_put(dict, field, qstring_from_str(value));

}

void error_free(Error *err)

{

    if (err) {

        QDECREF(err->obj);

        qemu_free(err->msg);

        qemu_free(err);

    }

}

bool error_is_type(Error *err, const char *fmt)

{

    const char *error_class;

    char *ptr;

    char *end;

    ptr = strstr(fmt, "'class': '");

    assert(ptr != NULL);

    ptr += strlen("'class': '");

    end = strchr(ptr, '\'');

    assert(end != NULL);

    error_class = error_get_field(err, "class");

    if (strlen(error_class) != end - ptr) {

        return false;

    }

    return strncmp(ptr, error_class, end - ptr) == 0;

}

void error_propagate(Error **dst_err, Error *local_err)

{

    if (dst_err) {

        *dst_err = local_err;

    } else if (local_err) {

        error_free(local_err);

    }

}

QObject *error_get_qobject(Error *err)

{

    QINCREF(err->obj);

    return QOBJECT(err->obj);

}

void error_set_qobject(Error **errp, QObject *obj)

{

    Error *err;

    if (errp == NULL) {

        return;

    }

    err = qemu_mallocz(sizeof(*err));

    err->obj = qobject_to_qdict(obj);

    qobject_incref(obj);

    *errp = err;

}