include/qapi/util.h

   1 /*
   2  * QAPI util functions
   3  *
   4  * Copyright Fujitsu, Inc. 2014
   5  *
   6  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
   7  * See the COPYING.LIB file in the top-level directory.
   8  *
   9  */
  10
  11 #ifndef QAPI_UTIL_H
  12 #define QAPI_UTIL_H
  13
  14 typedef struct QEnumLookup {
  15     const char *const *array;
  16     int size;
  17 } QEnumLookup;
  18
  19 const char *qapi_enum_lookup(const QEnumLookup *lookup, int val);
  20 int qapi_enum_parse(const QEnumLookup *lookup, const char *buf,
  21                     int def, Error **errp);
  22 bool qapi_bool_parse(const char *name, const char *value, bool *obj,
  23                      Error **errp);
  24
  25 int parse_qapi_name(const char *name, bool complete);
  26
  27 /*
  28  * For any GenericList @list, insert @element at the front.
  29  *
  30  * Note that this macro evaluates @element exactly once, so it is safe
  31  * to have side-effects with that argument.
  32  */
  33 #define QAPI_LIST_PREPEND(list, element) do { \
  34     typeof(list) _tmp = g_malloc(sizeof(*(list))); \
  35     _tmp->value = (element); \
  36     _tmp->next = (list); \
  37     (list) = _tmp; \
  38 } while (0)
  39
  40 /*
  41  * For any pointer to a GenericList @tail (usually the 'next' member of a
  42  * list element), insert @element at the back and update the tail.
  43  *
  44  * Note that this macro evaluates @element exactly once, so it is safe
  45  * to have side-effects with that argument.
  46  */
  47 #define QAPI_LIST_APPEND(tail, element) do { \
  48     *(tail) = g_malloc0(sizeof(**(tail))); \
  49     (*(tail))->value = (element); \
  50     (tail) = &(*(tail))->next; \
  51 } while (0)
  52
  53 #endif