error.c

   1 /*
   2  * QEMU Error Objects
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU LGPL, version 2.  See
  10  * the COPYING.LIB file in the top-level directory.
  11  */
  12
  13 #include "qemu-common.h"
  14 #include "error.h"
  15 #include "qjson.h"
  16 #include "qdict.h"
  17 #include "qapi-types.h"
  18 #include "error_int.h"
  19 #include "qerror.h"
  20
  21 struct Error
  22 {
  23     QDict *obj;
  24     char *msg;
  25     ErrorClass err_class;
  26 };
  27
  28 void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
  29 {
  30     Error *err;
  31     va_list ap;
  32
  33     if (errp == NULL) {
  34         return;
  35     }
  36     assert(*errp == NULL);
  37
  38     err = g_malloc0(sizeof(*err));
  39
  40     va_start(ap, fmt);
  41     err->obj = qobject_to_qdict(qobject_from_jsonv(fmt, &ap));
  42     va_end(ap);
  43     err->msg = qerror_format(fmt, err->obj);
  44     err->err_class = err_class;
  45
  46     *errp = err;
  47 }
  48
  49 Error *error_copy(const Error *err)
  50 {
  51     Error *err_new;
  52
  53     err_new = g_malloc0(sizeof(*err));
  54     err_new->msg = g_strdup(err->msg);
  55     err_new->err_class = err->err_class;
  56     err_new->obj = err->obj;
  57     QINCREF(err_new->obj);
  58
  59     return err_new;
  60 }
  61
  62 bool error_is_set(Error **errp)
  63 {
  64     return (errp && *errp);
  65 }
  66
  67 ErrorClass error_get_class(const Error *err)
  68 {
  69     return err->err_class;
  70 }
  71
  72 const char *error_get_pretty(Error *err)
  73 {
  74     return err->msg;
  75 }
  76
  77 void error_free(Error *err)
  78 {
  79     if (err) {
  80         QDECREF(err->obj);
  81         g_free(err->msg);
  82         g_free(err);
  83     }
  84 }
  85
  86 void error_propagate(Error **dst_err, Error *local_err)
  87 {
  88     if (dst_err && !*dst_err) {
  89         *dst_err = local_err;
  90     } else if (local_err) {
  91         error_free(local_err);
  92     }
  93 }
  94
  95 QObject *error_get_qobject(Error *err)
  96 {
  97     QINCREF(err->obj);
  98     return QOBJECT(err->obj);
  99 }
 100
 101 void error_set_qobject(Error **errp, QObject *obj)
 102 {
 103     Error *err;
 104     if (errp == NULL) {
 105         return;
 106     }
 107     err = g_malloc0(sizeof(*err));
 108     err->obj = qobject_to_qdict(obj);
 109     qobject_incref(obj);
 110
 111     *errp = err;
 112 }