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/* $Id$ */
/* Structures for JSON parsing using only fixed-extent memory */
#include <stdbool.h>
#include <ctype.h>
typedef enum {integer, real, string, boolean,
flags, object, array, check} json_type;
#define nullbool -1 /* not true, not false */
struct json_enum_t {
char *name;
int mask;
};
struct json_array_t {
json_type element_type;
union {
const struct json_attr_t *subtype;
struct {
char **ptrs;
char *store;
int storelen;
} strings;
struct {
const struct json_enum_t *map;
int *bits;
} flags;
} arr;
int *count, maxlen;
};
struct json_attr_t {
char *attribute;
json_type type;
union {
int *integer;
double *real;
struct {
char *ptr;
int len;
} string;
bool *boolean;
struct json_array_t array;
} addr;
union {
int integer;
double real;
bool boolean;
char *check;
} dflt;
};
#define JSON_ATTR_MAX 31 /* max chars in JSON attribute name */
#define JSON_VAL_MAX 63 /* max chars in JSON value part */
int json_read_object(const char *, const struct json_attr_t *, int, const char **end);
int json_read_array(const char *, const struct json_array_t *, const char **);
const char *json_error_string(int);
#define JSON_ERR_OBSTART 1 /* non-WS when expecting object start */
#define JSON_ERR_ATTRSTART 2 /* non-WS when expecting attrib start */
#define JSON_ERR_BADATTR 3 /* unknown attribute name */
#define JSON_ERR_ATTRLEN 4 /* attribute name too long */
#define JSON_ERR_NOARRAY 5 /* saw [ when not expecting array */
#define JSON_ERR_NOBRAK 6 /* array element specified, but no [ */
#define JSON_ERR_STRLONG 7 /* string value too long */
#define JSON_ERR_TOKLONG 8 /* token value too long */
#define JSON_ERR_BADTRAIL 9 /* garbage while expecting , or } */
#define JSON_ERR_ARRAYSTART 10 /* didn't find expected array start */
#define JSON_ERR_OBJARR 11 /* error while parsing object array */
#define JSON_ERR_SUBTOOLONG 12 /* too many array elements */
#define JSON_ERR_BADSUBTRAIL 13 /* garbage while expecting array comma */
#define JSON_ERR_SUBTYPE 14 /* unsupported array element type */
#define JSON_ERR_BADSTRING 15 /* error while string parsing */
#define JSON_ERR_CHECKFAIL 16 /* check attribute not matched */
#define JSON_ERR_BADENUM 17 /* invalid flag token */
/* json.h ends here */
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