avis/values.h

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/*
 *  Avis Elvin client library for C.
 *
 *  Copyright (C) 2008 Matthew Phillips <avis@mattp.name>
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of version 3 of the GNU Lesser General
 *  Public License as published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef AVIS_VALUES_H_
#define AVIS_VALUES_H_

#include <string.h>

#include <avis/stdtypes.h>
#include <avis/arrays.h>
#include <avis/defs.h>

typedef enum
{
  TYPE_INT32 = 1, TYPE_INT64 = 2, TYPE_REAL64 = 3,
  TYPE_STRING = 4, TYPE_OPAQUE = 5
} ValueType;

typedef struct
{
  ValueType type;

  union
  {
    int32_t   int32;
    int64_t   int64;
    real64_t  real64;
    char *    str;
    Array     bytes;
  } value;
} Value;

AVIS_PUBLIC
Value *value_init (Value *value, ValueType type, ...);

AVIS_PUBLIC
void value_free (Value *value);

AVIS_PUBLIC
Value *value_copy (Value *target, const Value *source);

#define value_clone(source) value_copy (value_create (), source)

#define value_create() ((Value *)avis_emalloc (sizeof (Value)))

#define value_destroy(value) \
  (value_free (value), free (value), value = NULL)

#define value_create_int32(value) \
  (value_init (value_create (), TYPE_INT32, (int32_t)(value)))

#define value_create_int64(value) \
  (value_init (value_create (), TYPE_INT64, (int64_t)(value)))

#define value_create_real64(value) \
  (value_init (value_create (), TYPE_REAL64, (real64_t)(value)))

#define value_create_string(value) \
  (value_init (value_create (), TYPE_STRING, avis_estrdup (value)))

#define value_create_string_nocopy(value) \
  (value_init (value_create (), TYPE_STRING, value))

#define value_create_opaque(value) \
  (value_init (value_create (), TYPE_OPAQUE, value))

AVIS_PUBLIC
Array *array_init (Array *array, size_t item_count, size_t item_length);

AVIS_PUBLIC
void array_free (Array *array);

#define array_create(item_type, item_count) \
  (array_init ((Array *)avis_emalloc (sizeof (Array)), \
               item_count, sizeof (item_type)))

#define array_destroy(value) \
  (array_free (value), free (value), value = NULL)

#define array_get(array, index, item_type) \
  (((item_type *)array->items) [index])

AVIS_PUBLIC
bool array_equals (Array *array1, Array *array2);

#endif /*AVIS_VALUES_H_*/

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