libvirt/src/util/sexpr.h

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/*
* sexpr.h : S-Expression interfaces needed to communicate with the Xen Daemon
*
* Copyright (C) 2005
*
* Anthony Liguori <aliguori@us.ibm.com>
*
* This file is subject to the terms and conditions of the GNU Lesser General
* Public License. See the file COPYING.LIB in the main directory of this
* archive for more details.
*/
#ifndef _LIBVIR_SEXPR_H_
# define _LIBVIR_SEXPR_H_
# include "internal.h"
# include <sys/types.h>
# include <stdint.h>
enum sexpr_type {
SEXPR_NIL,
SEXPR_CONS,
SEXPR_VALUE,
};
struct sexpr {
enum sexpr_type kind;
union {
struct {
struct sexpr *car;
struct sexpr *cdr;
} s;
char *value;
} u;
};
/* conversion to/from strings */
size_t sexpr2string(const struct sexpr *sexpr, char *buffer, size_t n_buffer);
struct sexpr *string2sexpr(const char *buffer);
/* constructors and destructors */
struct sexpr *sexpr_nil(void);
struct sexpr *sexpr_string(const char *str, ssize_t len);
struct sexpr *sexpr_cons(const struct sexpr *car, const struct sexpr *cdr);
struct sexpr *sexpr_append(struct sexpr *lst, const struct sexpr *item);
void sexpr_free(struct sexpr *sexpr);
/* lookup in S-Expressions */
const char *sexpr_node(const struct sexpr *sexpr, const char *node);
int sexpr_node_copy(const struct sexpr *sexpr, const char *node, char **dst);
const char *sexpr_fmt_node(const struct sexpr *sexpr, const char *fmt, ...)
ATTRIBUTE_FMT_PRINTF(2,3);
struct sexpr *sexpr_lookup(const struct sexpr *sexpr, const char *node);
int sexpr_has(const struct sexpr *sexpr, const char *node);
int sexpr_int(const struct sexpr *sexpr, const char *name);
double sexpr_float(const struct sexpr *sexpr, const char *name);
uint64_t sexpr_u64(const struct sexpr *sexpr, const char *name);
#endif