/*
* virjson.c: JSON object parsing/formatting
*
* Copyright (C) 2009-2010, 2012-2015 Red Hat, Inc.
* Copyright (C) 2009 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include "virjson.h"
#include "viralloc.h"
#include "virerror.h"
#include "virlog.h"
#include "virstring.h"
#include "virutil.h"
#include "virbuffer.h"
#include "virenum.h"
#if WITH_YAJL
# include <yajl/yajl_gen.h>
# include <yajl/yajl_parse.h>
#endif
/* XXX fixme */
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("util.json");
typedef struct _virJSONObject virJSONObject;
typedef virJSONObject *virJSONObjectPtr;
typedef struct _virJSONObjectPair virJSONObjectPair;
typedef virJSONObjectPair *virJSONObjectPairPtr;
typedef struct _virJSONArray virJSONArray;
typedef virJSONArray *virJSONArrayPtr;
struct _virJSONObjectPair {
char *key;
virJSONValuePtr value;
};
struct _virJSONObject {
size_t npairs;
virJSONObjectPairPtr pairs;
};
struct _virJSONArray {
size_t nvalues;
virJSONValuePtr *values;
};
struct _virJSONValue {
int type; /* enum virJSONType */
union {
virJSONObject object;
virJSONArray array;
char *string;
char *number; /* int/float/etc format is context defined so we can't parse it here :-( */
int boolean;
} data;
};
typedef struct _virJSONParserState virJSONParserState;
typedef virJSONParserState *virJSONParserStatePtr;
struct _virJSONParserState {
virJSONValuePtr value;
char *key;
};
typedef struct _virJSONParser virJSONParser;
typedef virJSONParser *virJSONParserPtr;
struct _virJSONParser {
virJSONValuePtr head;
virJSONParserStatePtr state;
size_t nstate;
int wrap;
};
virJSONType
virJSONValueGetType(const virJSONValue *value)
{
return value->type;
}
/**
* virJSONValueObjectAddVArgs:
* @obj: JSON object to add the values to
* @args: a key-value argument pairs, terminated by NULL
*
* Adds the key-value pairs supplied as variable argument list to @obj.
*
* Keys look like s:name the first letter is a type code:
* Explanation of type codes:
* s: string value, must be non-null
* S: string value, omitted if null
*
* i: signed integer value
* j: signed integer value, error if negative
* z: signed integer value, omitted if zero
* y: signed integer value, omitted if zero, error if negative
*
* I: signed long integer value
* J: signed long integer value, error if negative
* Z: signed long integer value, omitted if zero
* Y: signed long integer value, omitted if zero, error if negative
*
* u: unsigned integer value
* p: unsigned integer value, omitted if zero
*
* U: unsigned long integer value (see below for quirks)
* P: unsigned long integer value, omitted if zero
*
* b: boolean value
* B: boolean value, omitted if false
* T: boolean value specified by a virTristate(Bool|Switch) value, omitted on
* the _ABSENT value
*
* d: double precision floating point number
* n: json null value
*
* The following two cases take a pointer to a pointer to a virJSONValuePtr. The
* pointer is cleared when the virJSONValuePtr is stolen into the object.
* a: json object, must be non-NULL
* A: json object, omitted if NULL
*
* m: a bitmap represented as a JSON array, must be non-NULL
* M: a bitmap represented as a JSON array, omitted if NULL
*
* The value corresponds to the selected type.
*
* Returns -1 on error. 1 on success, if at least one key:pair was valid 0
* in case of no error but nothing was filled.
*/
int
virJSONValueObjectAddVArgs(virJSONValuePtr obj,
va_list args)
{
char type;
char *key;
int rc;
while ((key = va_arg(args, char *)) != NULL) {
if (strlen(key) < 3) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("argument key '%s' is too short, missing type prefix"),
key);
return -1;
}
type = key[0];
key += 2;
/* This doesn't support maps, but no command uses those. */
switch (type) {
case 'S':
case 's': {
char *val = va_arg(args, char *);
if (!val) {
if (type == 'S')
continue;
virReportError(VIR_ERR_INTERNAL_ERROR,
_("argument key '%s' must not have null value"),
key);
return -1;
}
rc = virJSONValueObjectAppendString(obj, key, val);
} break;
case 'z':
case 'y':
case 'j':
case 'i': {
int val = va_arg(args, int);
if (val < 0 && (type == 'j' || type == 'y')) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("argument key '%s' must not be negative"),
key);
return -1;
}
if (!val && (type == 'z' || type == 'y'))
continue;
rc = virJSONValueObjectAppendNumberInt(obj, key, val);
} break;
case 'p':
case 'u': {
unsigned int val = va_arg(args, unsigned int);
if (!val && type == 'p')
continue;
rc = virJSONValueObjectAppendNumberUint(obj, key, val);
} break;
case 'Z':
case 'Y':
case 'J':
case 'I': {
long long val = va_arg(args, long long);
if (val < 0 && (type == 'J' || type == 'Y')) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("argument key '%s' must not be negative"),
key);
return -1;
}
if (!val && (type == 'Z' || type == 'Y'))
continue;
rc = virJSONValueObjectAppendNumberLong(obj, key, val);
} break;
case 'P':
case 'U': {
/* qemu silently truncates numbers larger than LLONG_MAX,
* so passing the full range of unsigned 64 bit integers
* is not safe here. Pass them as signed 64 bit integers
* instead.
*/
long long val = va_arg(args, long long);
if (!val && type == 'P')
continue;
rc = virJSONValueObjectAppendNumberLong(obj, key, val);
} break;
case 'd': {
double val = va_arg(args, double);
rc = virJSONValueObjectAppendNumberDouble(obj, key, val);
} break;
case 'T':
case 'B':
case 'b': {
int val = va_arg(args, int);
if (!val && type == 'B')
continue;
if (type == 'T') {
if (val == VIR_TRISTATE_BOOL_ABSENT)
continue;
if (val == VIR_TRISTATE_BOOL_NO)
val = 0;
else
val = 1;
}
rc = virJSONValueObjectAppendBoolean(obj, key, val);
} break;
case 'n': {
rc = virJSONValueObjectAppendNull(obj, key);
} break;
case 'A':
case 'a': {
virJSONValuePtr *val = va_arg(args, virJSONValuePtr *);
if (!(*val)) {
if (type == 'A')
continue;
virReportError(VIR_ERR_INTERNAL_ERROR,
_("argument key '%s' must not have null value"),
key);
return -1;
}
if ((rc = virJSONValueObjectAppend(obj, key, *val)) == 0)
*val = NULL;
} break;
case 'M':
case 'm': {
virBitmapPtr map = va_arg(args, virBitmapPtr);
virJSONValuePtr jsonMap;
if (!map) {
if (type == 'M')
continue;
virReportError(VIR_ERR_INTERNAL_ERROR,
_("argument key '%s' must not have null value"),
key);
return -1;
}
if (!(jsonMap = virJSONValueNewArrayFromBitmap(map)))
return -1;
if ((rc = virJSONValueObjectAppend(obj, key, jsonMap)) < 0)
virJSONValueFree(jsonMap);
} break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unsupported data type '%c' for arg '%s'"), type, key - 2);
return -1;
}
if (rc < 0)
return -1;
}
/* verify that we added at least one key-value pair */
if (virJSONValueObjectKeysNumber(obj) == 0)
return 0;
return 1;
}
int
virJSONValueObjectAdd(virJSONValuePtr obj, ...)
{
va_list args;
int ret;
va_start(args, obj);
ret = virJSONValueObjectAddVArgs(obj, args);
va_end(args);
return ret;
}
int
virJSONValueObjectCreateVArgs(virJSONValuePtr *obj,
va_list args)
{
int ret;
*obj = virJSONValueNewObject();
/* free the object on error, or if no value objects were added */
if ((ret = virJSONValueObjectAddVArgs(*obj, args)) <= 0) {
virJSONValueFree(*obj);
*obj = NULL;
}
return ret;
}
int
virJSONValueObjectCreate(virJSONValuePtr *obj, ...)
{
va_list args;
int ret;
va_start(args, obj);
ret = virJSONValueObjectCreateVArgs(obj, args);
va_end(args);
return ret;
}
void
virJSONValueFree(virJSONValuePtr value)
{
size_t i;
if (!value)
return;
switch ((virJSONType) value->type) {
case VIR_JSON_TYPE_OBJECT:
for (i = 0; i < value->data.object.npairs; i++) {
VIR_FREE(value->data.object.pairs[i].key);
virJSONValueFree(value->data.object.pairs[i].value);
}
VIR_FREE(value->data.object.pairs);
break;
case VIR_JSON_TYPE_ARRAY:
for (i = 0; i < value->data.array.nvalues; i++)
virJSONValueFree(value->data.array.values[i]);
VIR_FREE(value->data.array.values);
break;
case VIR_JSON_TYPE_STRING:
VIR_FREE(value->data.string);
break;
case VIR_JSON_TYPE_NUMBER:
VIR_FREE(value->data.number);
break;
case VIR_JSON_TYPE_BOOLEAN:
case VIR_JSON_TYPE_NULL:
break;
}
VIR_FREE(value);
}
void
virJSONValueHashFree(void *opaque)
{
virJSONValueFree(opaque);
}
virJSONValuePtr
virJSONValueNewString(const char *data)
{
virJSONValuePtr val;
if (!data)
return virJSONValueNewNull();
if (VIR_ALLOC(val) < 0)
return NULL;
val->type = VIR_JSON_TYPE_STRING;
val->data.string = g_strdup(data);
return val;
}
virJSONValuePtr
virJSONValueNewStringLen(const char *data,
size_t length)
{
virJSONValuePtr val;
if (!data)
return virJSONValueNewNull();
if (VIR_ALLOC(val) < 0)
return NULL;
val->type = VIR_JSON_TYPE_STRING;
val->data.string = g_strndup(data, length);
return val;
}
static virJSONValuePtr
virJSONValueNewNumber(const char *data)
{
virJSONValuePtr val;
if (VIR_ALLOC(val) < 0)
return NULL;
val->type = VIR_JSON_TYPE_NUMBER;
val->data.number = g_strdup(data);
return val;
}
virJSONValuePtr
virJSONValueNewNumberInt(int data)
{
g_autofree char *str = NULL;
str = g_strdup_printf("%i", data);
return virJSONValueNewNumber(str);
}
virJSONValuePtr
virJSONValueNewNumberUint(unsigned int data)
{
g_autofree char *str = NULL;
str = g_strdup_printf("%u", data);
return virJSONValueNewNumber(str);
}
virJSONValuePtr
virJSONValueNewNumberLong(long long data)
{
g_autofree char *str = NULL;
str = g_strdup_printf("%lld", data);
return virJSONValueNewNumber(str);
}
virJSONValuePtr
virJSONValueNewNumberUlong(unsigned long long data)
{
g_autofree char *str = NULL;
str = g_strdup_printf("%llu", data);
return virJSONValueNewNumber(str);
}
virJSONValuePtr
virJSONValueNewNumberDouble(double data)
{
g_autofree char *str = NULL;
if (virDoubleToStr(&str, data) < 0)
return NULL;
return virJSONValueNewNumber(str);
}
virJSONValuePtr
virJSONValueNewBoolean(int boolean_)
{
virJSONValuePtr val;
if (VIR_ALLOC(val) < 0)
return NULL;
val->type = VIR_JSON_TYPE_BOOLEAN;
val->data.boolean = boolean_;
return val;
}
virJSONValuePtr
virJSONValueNewNull(void)
{
virJSONValuePtr val;
if (VIR_ALLOC(val) < 0)
return NULL;
val->type = VIR_JSON_TYPE_NULL;
return val;
}
virJSONValuePtr
virJSONValueNewArray(void)
{
virJSONValuePtr val = g_new0(virJSONValue, 1);
val->type = VIR_JSON_TYPE_ARRAY;
return val;
}
virJSONValuePtr
virJSONValueNewObject(void)
{
virJSONValuePtr val = g_new0(virJSONValue, 1);
val->type = VIR_JSON_TYPE_OBJECT;
return val;
}
static int
virJSONValueObjectInsert(virJSONValuePtr object,
const char *key,
virJSONValuePtr value,
bool prepend)
{
virJSONObjectPair pair = { NULL, value };
int ret = -1;
if (object->type != VIR_JSON_TYPE_OBJECT) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("expecting JSON object"));
return -1;
}
if (virJSONValueObjectHasKey(object, key)) {
virReportError(VIR_ERR_INTERNAL_ERROR, _("duplicate key '%s'"), key);
return -1;
}
pair.key = g_strdup(key);
if (prepend) {
ret = VIR_INSERT_ELEMENT(object->data.object.pairs, 0,
object->data.object.npairs, pair);
} else {
ret = VIR_APPEND_ELEMENT(object->data.object.pairs,
object->data.object.npairs, pair);
}
VIR_FREE(pair.key);
return ret;
}
int
virJSONValueObjectAppend(virJSONValuePtr object,
const char *key,
virJSONValuePtr value)
{
return virJSONValueObjectInsert(object, key, value, false);
}
static int
virJSONValueObjectInsertString(virJSONValuePtr object,
const char *key,
const char *value,
bool prepend)
{
virJSONValuePtr jvalue = virJSONValueNewString(value);
if (!jvalue)
return -1;
if (virJSONValueObjectInsert(object, key, jvalue, prepend) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueObjectAppendString(virJSONValuePtr object,
const char *key,
const char *value)
{
return virJSONValueObjectInsertString(object, key, value, false);
}
int
virJSONValueObjectAppendStringPrintf(virJSONValuePtr object,
const char *key,
const char *fmt,
...)
{
va_list ap;
g_autofree char *str = NULL;
va_start(ap, fmt);
str = g_strdup_vprintf(fmt, ap);
va_end(ap);
return virJSONValueObjectInsertString(object, key, str, false);
}
int
virJSONValueObjectPrependString(virJSONValuePtr object,
const char *key,
const char *value)
{
return virJSONValueObjectInsertString(object, key, value, true);
}
int
virJSONValueObjectAppendNumberInt(virJSONValuePtr object,
const char *key,
int number)
{
virJSONValuePtr jvalue = virJSONValueNewNumberInt(number);
if (!jvalue)
return -1;
if (virJSONValueObjectAppend(object, key, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueObjectAppendNumberUint(virJSONValuePtr object,
const char *key,
unsigned int number)
{
virJSONValuePtr jvalue = virJSONValueNewNumberUint(number);
if (!jvalue)
return -1;
if (virJSONValueObjectAppend(object, key, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueObjectAppendNumberLong(virJSONValuePtr object,
const char *key,
long long number)
{
virJSONValuePtr jvalue = virJSONValueNewNumberLong(number);
if (!jvalue)
return -1;
if (virJSONValueObjectAppend(object, key, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueObjectAppendNumberUlong(virJSONValuePtr object,
const char *key,
unsigned long long number)
{
virJSONValuePtr jvalue = virJSONValueNewNumberUlong(number);
if (!jvalue)
return -1;
if (virJSONValueObjectAppend(object, key, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueObjectAppendNumberDouble(virJSONValuePtr object,
const char *key,
double number)
{
virJSONValuePtr jvalue = virJSONValueNewNumberDouble(number);
if (!jvalue)
return -1;
if (virJSONValueObjectAppend(object, key, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueObjectAppendBoolean(virJSONValuePtr object,
const char *key,
int boolean_)
{
virJSONValuePtr jvalue = virJSONValueNewBoolean(boolean_);
if (!jvalue)
return -1;
if (virJSONValueObjectAppend(object, key, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueObjectAppendNull(virJSONValuePtr object,
const char *key)
{
virJSONValuePtr jvalue = virJSONValueNewNull();
if (!jvalue)
return -1;
if (virJSONValueObjectAppend(object, key, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
int
virJSONValueArrayAppend(virJSONValuePtr array,
virJSONValuePtr value)
{
if (array->type != VIR_JSON_TYPE_ARRAY) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("expecting JSON array"));
return -1;
}
if (VIR_REALLOC_N(array->data.array.values,
array->data.array.nvalues + 1) < 0)
return -1;
array->data.array.values[array->data.array.nvalues] = value;
array->data.array.nvalues++;
return 0;
}
int
virJSONValueArrayAppendString(virJSONValuePtr object,
const char *value)
{
virJSONValuePtr jvalue = virJSONValueNewString(value);
if (!jvalue)
return -1;
if (virJSONValueArrayAppend(object, jvalue) < 0) {
virJSONValueFree(jvalue);
return -1;
}
return 0;
}
/**
* virJSONValueArrayConcat:
* @a: JSON value array (destination)
* @c: JSON value array (source)
*
* Merges the members of @c array into @a. The values are stolen from @c.
*/
int
virJSONValueArrayConcat(virJSONValuePtr a,
virJSONValuePtr c)
{
size_t i;
if (a->type != VIR_JSON_TYPE_ARRAY ||
c->type != VIR_JSON_TYPE_ARRAY) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("expecting JSON array"));
return -1;
}
a->data.array.values = g_renew(virJSONValuePtr, a->data.array.values,
a->data.array.nvalues + c->data.array.nvalues);
for (i = 0; i < c->data.array.nvalues; i++)
a->data.array.values[a->data.array.nvalues++] = g_steal_pointer(&c->data.array.values[i]);
c->data.array.nvalues = 0;
return 0;
}
int
virJSONValueObjectHasKey(virJSONValuePtr object,
const char *key)
{
size_t i;
if (object->type != VIR_JSON_TYPE_OBJECT)
return -1;
for (i = 0; i < object->data.object.npairs; i++) {
if (STREQ(object->data.object.pairs[i].key, key))
return 1;
}
return 0;
}
virJSONValuePtr
virJSONValueObjectGet(virJSONValuePtr object,
const char *key)
{
size_t i;
if (object->type != VIR_JSON_TYPE_OBJECT)
return NULL;
for (i = 0; i < object->data.object.npairs; i++) {
if (STREQ(object->data.object.pairs[i].key, key))
return object->data.object.pairs[i].value;
}
return NULL;
}
static virJSONValuePtr
virJSONValueObjectSteal(virJSONValuePtr object,
const char *key)
{
size_t i;
virJSONValuePtr obj = NULL;
if (object->type != VIR_JSON_TYPE_OBJECT)
return NULL;
for (i = 0; i < object->data.object.npairs; i++) {
if (STREQ(object->data.object.pairs[i].key, key)) {
obj = g_steal_pointer(&object->data.object.pairs[i].value);
VIR_FREE(object->data.object.pairs[i].key);
VIR_DELETE_ELEMENT(object->data.object.pairs, i,
object->data.object.npairs);
break;
}
}
return obj;
}
/* Return the value associated with KEY within OBJECT, but return NULL
* if the key is missing or if value is not the correct TYPE. */
virJSONValuePtr
virJSONValueObjectGetByType(virJSONValuePtr object,
const char *key,
virJSONType type)
{
virJSONValuePtr value = virJSONValueObjectGet(object, key);
if (value && value->type == type)
return value;
return NULL;
}
/* Steal the value associated with KEY within OBJECT, but return NULL
* if the key is missing or if value is not the correct TYPE. */
static virJSONValuePtr
virJSONValueObjectStealByType(virJSONValuePtr object,
const char *key,
virJSONType type)
{
virJSONValuePtr value = virJSONValueObjectSteal(object, key);
if (value && value->type == type)
return value;
return NULL;
}
int
virJSONValueObjectKeysNumber(virJSONValuePtr object)
{
if (object->type != VIR_JSON_TYPE_OBJECT)
return -1;
return object->data.object.npairs;
}
const char *
virJSONValueObjectGetKey(virJSONValuePtr object,
unsigned int n)
{
if (object->type != VIR_JSON_TYPE_OBJECT)
return NULL;
if (n >= object->data.object.npairs)
return NULL;
return object->data.object.pairs[n].key;
}
/* Remove the key-value pair tied to @key out of @object. If @value is
* not NULL, the dropped value object is returned instead of freed.
* Returns 1 on success, 0 if no key was found, and -1 on error. */
int
virJSONValueObjectRemoveKey(virJSONValuePtr object,
const char *key,
virJSONValuePtr *value)
{
size_t i;
if (value)
*value = NULL;
if (object->type != VIR_JSON_TYPE_OBJECT)
return -1;
for (i = 0; i < object->data.object.npairs; i++) {
if (STREQ(object->data.object.pairs[i].key, key)) {
if (value) {
*value = object->data.object.pairs[i].value;
object->data.object.pairs[i].value = NULL;
}
VIR_FREE(object->data.object.pairs[i].key);
virJSONValueFree(object->data.object.pairs[i].value);
VIR_DELETE_ELEMENT(object->data.object.pairs, i,
object->data.object.npairs);
return 1;
}
}
return 0;
}
virJSONValuePtr
virJSONValueObjectGetValue(virJSONValuePtr object,
unsigned int n)
{
if (object->type != VIR_JSON_TYPE_OBJECT)
return NULL;
if (n >= object->data.object.npairs)
return NULL;
return object->data.object.pairs[n].value;
}
bool
virJSONValueIsObject(virJSONValuePtr object)
{
if (object)
return object->type == VIR_JSON_TYPE_OBJECT;
else
return false;
}
bool
virJSONValueIsArray(virJSONValuePtr array)
{
return array->type == VIR_JSON_TYPE_ARRAY;
}
size_t
virJSONValueArraySize(const virJSONValue *array)
{
return array->data.array.nvalues;
}
virJSONValuePtr
virJSONValueArrayGet(virJSONValuePtr array,
unsigned int element)
{
if (array->type != VIR_JSON_TYPE_ARRAY)
return NULL;
if (element >= array->data.array.nvalues)
return NULL;
return array->data.array.values[element];
}
virJSONValuePtr
virJSONValueArraySteal(virJSONValuePtr array,
unsigned int element)
{
virJSONValuePtr ret = NULL;
if (array->type != VIR_JSON_TYPE_ARRAY)
return NULL;
if (element >= array->data.array.nvalues)
return NULL;
ret = array->data.array.values[element];
VIR_DELETE_ELEMENT(array->data.array.values,
element,
array->data.array.nvalues);
return ret;
}
/**
* virJSONValueArrayForeachSteal:
* @array: array to iterate
* @cb: callback called on every member of the array
* @opaque: custom data for the callback
*
* Iterates members of the array and calls the callback on every single member.
* The return codes of the callback are interpreted as follows:
* 0: callback claims ownership of the array element and is responsible for
* freeing it
* 1: callback doesn't claim ownership of the element
* -1: callback doesn't claim ownership of the element and iteration does not
* continue
*
* Returns 0 if all members were iterated and/or stolen by the callback; -1
* on callback failure or if the JSON value object is not an array.
* The rest of the members stay in possession of the array and it's condensed.
*/
int
virJSONValueArrayForeachSteal(virJSONValuePtr array,
virJSONArrayIteratorFunc cb,
void *opaque)
{
size_t i;
size_t j = 0;
int ret = 0;
int rc;
if (array->type != VIR_JSON_TYPE_ARRAY)
return -1;
for (i = 0; i < array->data.array.nvalues; i++) {
if ((rc = cb(i, array->data.array.values[i], opaque)) < 0) {
ret = -1;
break;
}
if (rc == 0)
array->data.array.values[i] = NULL;
}
/* condense the remaining entries at the beginning */
for (i = 0; i < array->data.array.nvalues; i++) {
if (!array->data.array.values[i])
continue;
array->data.array.values[j++] = array->data.array.values[i];
}
array->data.array.nvalues = j;
return ret;
}
const char *
virJSONValueGetString(virJSONValuePtr string)
{
if (string->type != VIR_JSON_TYPE_STRING)
return NULL;
return string->data.string;
}
const char *
virJSONValueGetNumberString(virJSONValuePtr number)
{
if (number->type != VIR_JSON_TYPE_NUMBER)
return NULL;
return number->data.number;
}
int
virJSONValueGetNumberInt(virJSONValuePtr number,
int *value)
{
if (number->type != VIR_JSON_TYPE_NUMBER)
return -1;
return virStrToLong_i(number->data.number, NULL, 10, value);
}
int
virJSONValueGetNumberUint(virJSONValuePtr number,
unsigned int *value)
{
if (number->type != VIR_JSON_TYPE_NUMBER)
return -1;
return virStrToLong_ui(number->data.number, NULL, 10, value);
}
int
virJSONValueGetNumberLong(virJSONValuePtr number,
long long *value)
{
if (number->type != VIR_JSON_TYPE_NUMBER)
return -1;
return virStrToLong_ll(number->data.number, NULL, 10, value);
}
int
virJSONValueGetNumberUlong(virJSONValuePtr number,
unsigned long long *value)
{
if (number->type != VIR_JSON_TYPE_NUMBER)
return -1;
return virStrToLong_ull(number->data.number, NULL, 10, value);
}
int
virJSONValueGetNumberDouble(virJSONValuePtr number,
double *value)
{
if (number->type != VIR_JSON_TYPE_NUMBER)
return -1;
return virStrToDouble(number->data.number, NULL, value);
}
int
virJSONValueGetBoolean(virJSONValuePtr val,
bool *value)
{
if (val->type != VIR_JSON_TYPE_BOOLEAN)
return -1;
*value = val->data.boolean;
return 0;
}
/**
* virJSONValueGetArrayAsBitmap:
* @val: JSON array to convert to bitmap
* @bitmap: New bitmap is allocated filled and returned via this argument
*
* Attempts a conversion of a JSON array to a bitmap. The members of the array
* must be non-negative integers for the conversion to succeed. This function
* does not report libvirt errors so that it can be used to probe that the
* array can be represented as a bitmap.
*
* Returns 0 on success and fills @bitmap; -1 on error and @bitmap is set to
* NULL.
*/
int
virJSONValueGetArrayAsBitmap(const virJSONValue *val,
virBitmapPtr *bitmap)
{
virJSONValuePtr elem;
size_t i;
g_autofree unsigned long long *elems = NULL;
unsigned long long maxelem = 0;
*bitmap = NULL;
if (val->type != VIR_JSON_TYPE_ARRAY)
return -1;
elems = g_new0(unsigned long long, val->data.array.nvalues);
/* first pass converts array members to numbers and finds the maximum */
for (i = 0; i < val->data.array.nvalues; i++) {
elem = val->data.array.values[i];
if (elem->type != VIR_JSON_TYPE_NUMBER ||
virStrToLong_ullp(elem->data.number, NULL, 10, &elems[i]) < 0)
return -1;
if (elems[i] > maxelem)
maxelem = elems[i];
}
if (!(*bitmap = virBitmapNewQuiet(maxelem + 1)))
return -1;
/* second pass sets the correct bits in the map */
for (i = 0; i < val->data.array.nvalues; i++)
ignore_value(virBitmapSetBit(*bitmap, elems[i]));
return 0;
}
virJSONValuePtr
virJSONValueNewArrayFromBitmap(virBitmapPtr bitmap)
{
virJSONValuePtr ret;
ssize_t pos = -1;
ret = virJSONValueNewArray();
if (!bitmap)
return ret;
while ((pos = virBitmapNextSetBit(bitmap, pos)) > -1) {
virJSONValuePtr newelem;
if (!(newelem = virJSONValueNewNumberLong(pos)) ||
virJSONValueArrayAppend(ret, newelem) < 0) {
virJSONValueFree(newelem);
goto error;
}
}
return ret;
error:
virJSONValueFree(ret);
return NULL;
}
bool
virJSONValueIsNull(virJSONValuePtr val)
{
return val->type == VIR_JSON_TYPE_NULL;
}
const char *
virJSONValueObjectGetString(virJSONValuePtr object,
const char *key)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return NULL;
return virJSONValueGetString(val);
}
/**
* virJSONValueObjectGetStringOrNumber:
* @object: JSON value object
* @key: name of the property in @object to get
*
* Gets a property named @key from the JSON object @object. The value may be
* a number or a string and is returned as a string. In cases when the property
* is not present or is not a string or number NULL is returned.
*/
const char *
virJSONValueObjectGetStringOrNumber(virJSONValuePtr object,
const char *key)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return NULL;
if (val->type == VIR_JSON_TYPE_STRING)
return val->data.string;
else if (val->type == VIR_JSON_TYPE_NUMBER)
return val->data.number;
return NULL;
}
int
virJSONValueObjectGetNumberInt(virJSONValuePtr object,
const char *key,
int *value)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return -1;
return virJSONValueGetNumberInt(val, value);
}
int
virJSONValueObjectGetNumberUint(virJSONValuePtr object,
const char *key,
unsigned int *value)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return -1;
return virJSONValueGetNumberUint(val, value);
}
int
virJSONValueObjectGetNumberLong(virJSONValuePtr object,
const char *key,
long long *value)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return -1;
return virJSONValueGetNumberLong(val, value);
}
int
virJSONValueObjectGetNumberUlong(virJSONValuePtr object,
const char *key,
unsigned long long *value)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return -1;
return virJSONValueGetNumberUlong(val, value);
}
int
virJSONValueObjectGetNumberDouble(virJSONValuePtr object,
const char *key,
double *value)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return -1;
return virJSONValueGetNumberDouble(val, value);
}
int
virJSONValueObjectGetBoolean(virJSONValuePtr object,
const char *key,
bool *value)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return -1;
return virJSONValueGetBoolean(val, value);
}
virJSONValuePtr
virJSONValueObjectGetObject(virJSONValuePtr object, const char *key)
{
return virJSONValueObjectGetByType(object, key, VIR_JSON_TYPE_OBJECT);
}
virJSONValuePtr
virJSONValueObjectGetArray(virJSONValuePtr object, const char *key)
{
return virJSONValueObjectGetByType(object, key, VIR_JSON_TYPE_ARRAY);
}
virJSONValuePtr
virJSONValueObjectStealArray(virJSONValuePtr object, const char *key)
{
return virJSONValueObjectStealByType(object, key, VIR_JSON_TYPE_ARRAY);
}
virJSONValuePtr
virJSONValueObjectStealObject(virJSONValuePtr object,
const char *key)
{
return virJSONValueObjectStealByType(object, key, VIR_JSON_TYPE_OBJECT);
}
int
virJSONValueObjectIsNull(virJSONValuePtr object,
const char *key)
{
virJSONValuePtr val = virJSONValueObjectGet(object, key);
if (!val)
return -1;
return virJSONValueIsNull(val);
}
/**
* virJSONValueObjectForeachKeyValue:
* @object: JSON object to iterate
* @cb: callback to call on key-value pairs contained in the object
* @opaque: generic data for the callback
*
* Iterates all key=value pairs in @object. Iteration breaks if @cb returns
* negative value.
*
* Returns 0 if all elements were iterated, -2 if @cb returned negative value
* during iteration and -1 on generic errors.
*/
int
virJSONValueObjectForeachKeyValue(virJSONValuePtr object,
virJSONValueObjectIteratorFunc cb,
void *opaque)
{
size_t i;
if (object->type != VIR_JSON_TYPE_OBJECT)
return -1;
for (i = 0; i < object->data.object.npairs; i++) {
virJSONObjectPairPtr elem = object->data.object.pairs + i;
if (cb(elem->key, elem->value, opaque) < 0)
return -2;
}
return 0;
}
virJSONValuePtr
virJSONValueCopy(const virJSONValue *in)
{
size_t i;
virJSONValuePtr out = NULL;
if (!in)
return NULL;
switch ((virJSONType) in->type) {
case VIR_JSON_TYPE_OBJECT:
out = virJSONValueNewObject();
for (i = 0; i < in->data.object.npairs; i++) {
virJSONValuePtr val = NULL;
if (!(val = virJSONValueCopy(in->data.object.pairs[i].value)))
goto error;
if (virJSONValueObjectAppend(out, in->data.object.pairs[i].key,
val) < 0) {
virJSONValueFree(val);
goto error;
}
}
break;
case VIR_JSON_TYPE_ARRAY:
out = virJSONValueNewArray();
for (i = 0; i < in->data.array.nvalues; i++) {
virJSONValuePtr val = NULL;
if (!(val = virJSONValueCopy(in->data.array.values[i])))
goto error;
if (virJSONValueArrayAppend(out, val) < 0) {
virJSONValueFree(val);
goto error;
}
}
break;
/* No need to error out in the following cases */
case VIR_JSON_TYPE_STRING:
out = virJSONValueNewString(in->data.string);
break;
case VIR_JSON_TYPE_NUMBER:
out = virJSONValueNewNumber(in->data.number);
break;
case VIR_JSON_TYPE_BOOLEAN:
out = virJSONValueNewBoolean(in->data.boolean);
break;
case VIR_JSON_TYPE_NULL:
out = virJSONValueNewNull();
break;
}
return out;
error:
virJSONValueFree(out);
return NULL;
}
#if WITH_YAJL
static int
virJSONParserInsertValue(virJSONParserPtr parser,
virJSONValuePtr value)
{
if (!parser->head) {
parser->head = value;
} else {
virJSONParserStatePtr state;
if (!parser->nstate) {
VIR_DEBUG("got a value to insert without a container");
return -1;
}
state = &parser->state[parser->nstate-1];
switch (state->value->type) {
case VIR_JSON_TYPE_OBJECT: {
if (!state->key) {
VIR_DEBUG("missing key when inserting object value");
return -1;
}
if (virJSONValueObjectAppend(state->value,
state->key,
value) < 0)
return -1;
VIR_FREE(state->key);
} break;
case VIR_JSON_TYPE_ARRAY: {
if (state->key) {
VIR_DEBUG("unexpected key when inserting array value");
return -1;
}
if (virJSONValueArrayAppend(state->value,
value) < 0)
return -1;
} break;
default:
VIR_DEBUG("unexpected value type, not a container");
return -1;
}
}
return 0;
}
static int
virJSONParserHandleNull(void *ctx)
{
virJSONParserPtr parser = ctx;
virJSONValuePtr value = virJSONValueNewNull();
VIR_DEBUG("parser=%p", parser);
if (!value)
return 0;
if (virJSONParserInsertValue(parser, value) < 0) {
virJSONValueFree(value);
return 0;
}
return 1;
}
static int
virJSONParserHandleBoolean(void *ctx,
int boolean_)
{
virJSONParserPtr parser = ctx;
virJSONValuePtr value = virJSONValueNewBoolean(boolean_);
VIR_DEBUG("parser=%p boolean=%d", parser, boolean_);
if (!value)
return 0;
if (virJSONParserInsertValue(parser, value) < 0) {
virJSONValueFree(value);
return 0;
}
return 1;
}
static int
virJSONParserHandleNumber(void *ctx,
const char *s,
size_t l)
{
virJSONParserPtr parser = ctx;
char *str;
virJSONValuePtr value;
str = g_strndup(s, l);
value = virJSONValueNewNumber(str);
VIR_FREE(str);
VIR_DEBUG("parser=%p str=%s", parser, str);
if (!value)
return 0;
if (virJSONParserInsertValue(parser, value) < 0) {
virJSONValueFree(value);
return 0;
}
return 1;
}
static int
virJSONParserHandleString(void *ctx,
const unsigned char *stringVal,
size_t stringLen)
{
virJSONParserPtr parser = ctx;
virJSONValuePtr value = virJSONValueNewStringLen((const char *)stringVal,
stringLen);
VIR_DEBUG("parser=%p str=%p", parser, (const char *)stringVal);
if (!value)
return 0;
if (virJSONParserInsertValue(parser, value) < 0) {
virJSONValueFree(value);
return 0;
}
return 1;
}
static int
virJSONParserHandleMapKey(void *ctx,
const unsigned char *stringVal,
size_t stringLen)
{
virJSONParserPtr parser = ctx;
virJSONParserStatePtr state;
VIR_DEBUG("parser=%p key=%p", parser, (const char *)stringVal);
if (!parser->nstate)
return 0;
state = &parser->state[parser->nstate-1];
if (state->key)
return 0;
state->key = g_strndup((const char *)stringVal, stringLen);
return 1;
}
static int
virJSONParserHandleStartMap(void *ctx)
{
virJSONParserPtr parser = ctx;
virJSONValuePtr value = virJSONValueNewObject();
VIR_DEBUG("parser=%p", parser);
if (virJSONParserInsertValue(parser, value) < 0) {
virJSONValueFree(value);
return 0;
}
if (VIR_REALLOC_N(parser->state,
parser->nstate + 1) < 0) {
return 0;
}
parser->state[parser->nstate].value = value;
parser->state[parser->nstate].key = NULL;
parser->nstate++;
return 1;
}
static int
virJSONParserHandleEndMap(void *ctx)
{
virJSONParserPtr parser = ctx;
virJSONParserStatePtr state;
VIR_DEBUG("parser=%p", parser);
if (!parser->nstate)
return 0;
state = &(parser->state[parser->nstate-1]);
if (state->key) {
VIR_FREE(state->key);
return 0;
}
VIR_DELETE_ELEMENT(parser->state, parser->nstate - 1, parser->nstate);
return 1;
}
static int
virJSONParserHandleStartArray(void *ctx)
{
virJSONParserPtr parser = ctx;
virJSONValuePtr value = virJSONValueNewArray();
VIR_DEBUG("parser=%p", parser);
if (virJSONParserInsertValue(parser, value) < 0) {
virJSONValueFree(value);
return 0;
}
if (VIR_REALLOC_N(parser->state,
parser->nstate + 1) < 0)
return 0;
parser->state[parser->nstate].value = value;
parser->state[parser->nstate].key = NULL;
parser->nstate++;
return 1;
}
static int
virJSONParserHandleEndArray(void *ctx)
{
virJSONParserPtr parser = ctx;
virJSONParserStatePtr state;
VIR_DEBUG("parser=%p", parser);
if (!(parser->nstate - parser->wrap))
return 0;
state = &(parser->state[parser->nstate-1]);
if (state->key) {
VIR_FREE(state->key);
return 0;
}
VIR_DELETE_ELEMENT(parser->state, parser->nstate - 1, parser->nstate);
return 1;
}
static const yajl_callbacks parserCallbacks = {
virJSONParserHandleNull,
virJSONParserHandleBoolean,
NULL,
NULL,
virJSONParserHandleNumber,
virJSONParserHandleString,
virJSONParserHandleStartMap,
virJSONParserHandleMapKey,
virJSONParserHandleEndMap,
virJSONParserHandleStartArray,
virJSONParserHandleEndArray
};
/* XXX add an incremental streaming parser - yajl trivially supports it */
virJSONValuePtr
virJSONValueFromString(const char *jsonstring)
{
yajl_handle hand;
virJSONParser parser = { NULL, NULL, 0, 0 };
virJSONValuePtr ret = NULL;
int rc;
size_t len = strlen(jsonstring);
VIR_DEBUG("string=%s", jsonstring);
hand = yajl_alloc(&parserCallbacks, NULL, &parser);
if (!hand) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to create JSON parser"));
return NULL;
}
/* Yajl 2 is nice enough to default to rejecting trailing garbage. */
rc = yajl_parse(hand, (const unsigned char *)jsonstring, len);
if (rc != yajl_status_ok ||
yajl_complete_parse(hand) != yajl_status_ok) {
unsigned char *errstr = yajl_get_error(hand, 1,
(const unsigned char*)jsonstring,
strlen(jsonstring));
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse json %s: %s"),
jsonstring, (const char*) errstr);
yajl_free_error(hand, errstr);
virJSONValueFree(parser.head);
goto cleanup;
}
if (parser.nstate != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse json %s: unterminated string/map/array"),
jsonstring);
virJSONValueFree(parser.head);
} else {
ret = parser.head;
}
cleanup:
yajl_free(hand);
if (parser.nstate) {
size_t i;
for (i = 0; i < parser.nstate; i++)
VIR_FREE(parser.state[i].key);
VIR_FREE(parser.state);
}
VIR_DEBUG("result=%p", ret);
return ret;
}
static int
virJSONValueToStringOne(virJSONValuePtr object,
yajl_gen g)
{
size_t i;
VIR_DEBUG("object=%p type=%d gen=%p", object, object->type, g);
switch (object->type) {
case VIR_JSON_TYPE_OBJECT:
if (yajl_gen_map_open(g) != yajl_gen_status_ok)
return -1;
for (i = 0; i < object->data.object.npairs; i++) {
if (yajl_gen_string(g,
(unsigned char *)object->data.object.pairs[i].key,
strlen(object->data.object.pairs[i].key))
!= yajl_gen_status_ok)
return -1;
if (virJSONValueToStringOne(object->data.object.pairs[i].value, g) < 0)
return -1;
}
if (yajl_gen_map_close(g) != yajl_gen_status_ok)
return -1;
break;
case VIR_JSON_TYPE_ARRAY:
if (yajl_gen_array_open(g) != yajl_gen_status_ok)
return -1;
for (i = 0; i < object->data.array.nvalues; i++) {
if (virJSONValueToStringOne(object->data.array.values[i], g) < 0)
return -1;
}
if (yajl_gen_array_close(g) != yajl_gen_status_ok)
return -1;
break;
case VIR_JSON_TYPE_STRING:
if (yajl_gen_string(g, (unsigned char *)object->data.string,
strlen(object->data.string)) != yajl_gen_status_ok)
return -1;
break;
case VIR_JSON_TYPE_NUMBER:
if (yajl_gen_number(g, object->data.number,
strlen(object->data.number)) != yajl_gen_status_ok)
return -1;
break;
case VIR_JSON_TYPE_BOOLEAN:
if (yajl_gen_bool(g, object->data.boolean) != yajl_gen_status_ok)
return -1;
break;
case VIR_JSON_TYPE_NULL:
if (yajl_gen_null(g) != yajl_gen_status_ok)
return -1;
break;
default:
return -1;
}
return 0;
}
int
virJSONValueToBuffer(virJSONValuePtr object,
virBufferPtr buf,
bool pretty)
{
yajl_gen g;
const unsigned char *str;
size_t len;
int ret = -1;
VIR_DEBUG("object=%p", object);
g = yajl_gen_alloc(NULL);
if (!g) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Unable to create JSON formatter"));
goto cleanup;
}
yajl_gen_config(g, yajl_gen_beautify, pretty ? 1 : 0);
yajl_gen_config(g, yajl_gen_indent_string, pretty ? " " : " ");
yajl_gen_config(g, yajl_gen_validate_utf8, 1);
if (virJSONValueToStringOne(object, g) < 0) {
virReportOOMError();
goto cleanup;
}
if (yajl_gen_get_buf(g, &str, &len) != yajl_gen_status_ok) {
virReportOOMError();
goto cleanup;
}
virBufferAdd(buf, (const char *) str, len);
ret = 0;
cleanup:
yajl_gen_free(g);
return ret;
}
#else
virJSONValuePtr
virJSONValueFromString(const char *jsonstring G_GNUC_UNUSED)
{
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("No JSON parser implementation is available"));
return NULL;
}
int
virJSONValueToBuffer(virJSONValuePtr object G_GNUC_UNUSED,
virBufferPtr buf G_GNUC_UNUSED,
bool pretty G_GNUC_UNUSED)
{
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("No JSON parser implementation is available"));
return -1;
}
#endif
char *
virJSONValueToString(virJSONValuePtr object,
bool pretty)
{
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
if (virJSONValueToBuffer(object, &buf, pretty) < 0)
return NULL;
return virBufferContentAndReset(&buf);
}
/**
* virJSONStringReformat:
* @jsonstr: string to reformat
* @pretty: use the pretty formatter
*
* Reformats a JSON string by passing it to the parser and then to the
* formatter. If @pretty is true the JSON is formatted for human eye
* compatibility.
*
* Returns the reformatted JSON string on success; NULL and a libvirt error on
* failure.
*/
char *
virJSONStringReformat(const char *jsonstr,
bool pretty)
{
g_autoptr(virJSONValue) json = NULL;
if (!(json = virJSONValueFromString(jsonstr)))
return NULL;
return virJSONValueToString(json, pretty);
}
static virJSONValuePtr
virJSONValueObjectDeflattenKeys(virJSONValuePtr json);
static int
virJSONValueObjectDeflattenWorker(const char *key,
virJSONValuePtr value,
void *opaque)
{
virJSONValuePtr retobj = opaque;
g_autoptr(virJSONValue) newval = NULL;
virJSONValuePtr existobj;
VIR_AUTOSTRINGLIST tokens = NULL;
size_t ntokens = 0;
/* non-nested keys only need to be copied */
if (!strchr(key, '.')) {
if (virJSONValueIsObject(value))
newval = virJSONValueObjectDeflattenKeys(value);
else
newval = virJSONValueCopy(value);
if (!newval)
return -1;
if (virJSONValueObjectHasKey(retobj, key)) {
virReportError(VIR_ERR_INVALID_ARG,
_("can't deflatten colliding key '%s'"), key);
return -1;
}
if (virJSONValueObjectAppend(retobj, key, newval) < 0)
return -1;
newval = NULL;
return 0;
}
if (!(tokens = virStringSplitCount(key, ".", 2, &ntokens)))
return -1;
if (ntokens != 2) {
virReportError(VIR_ERR_INVALID_ARG,
_("invalid nested value key '%s'"), key);
return -1;
}
if (!(existobj = virJSONValueObjectGet(retobj, tokens[0]))) {
existobj = virJSONValueNewObject();
if (virJSONValueObjectAppend(retobj, tokens[0], existobj) < 0)
return -1;
} else {
if (!virJSONValueIsObject(existobj)) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("mixing nested objects and values is forbidden in "
"JSON deflattening"));
return -1;
}
}
return virJSONValueObjectDeflattenWorker(tokens[1], value, existobj);
}
static virJSONValuePtr
virJSONValueObjectDeflattenKeys(virJSONValuePtr json)
{
g_autoptr(virJSONValue) deflattened = virJSONValueNewObject();
if (virJSONValueObjectForeachKeyValue(json,
virJSONValueObjectDeflattenWorker,
deflattened) < 0)
return NULL;
return g_steal_pointer(&deflattened);
}
/**
* virJSONValueObjectDeflattenArrays:
*
* Reconstruct JSON arrays from objects which only have sequential numeric
* keys starting from 0.
*/
static void
virJSONValueObjectDeflattenArrays(virJSONValuePtr json)
{
g_autofree virJSONValuePtr *arraymembers = NULL;
virJSONObjectPtr obj;
size_t i;
if (!json ||
json->type != VIR_JSON_TYPE_OBJECT)
return;
obj = &json->data.object;
arraymembers = g_new0(virJSONValuePtr, obj->npairs);
for (i = 0; i < obj->npairs; i++)
virJSONValueObjectDeflattenArrays(obj->pairs[i].value);
for (i = 0; i < obj->npairs; i++) {
virJSONObjectPairPtr pair = obj->pairs + i;
unsigned int keynum;
if (virStrToLong_uip(pair->key, NULL, 10, &keynum) < 0)
return;
if (keynum >= obj->npairs)
return;
if (arraymembers[keynum])
return;
arraymembers[keynum] = pair->value;
}
for (i = 0; i < obj->npairs; i++)
g_free(obj->pairs[i].key);
g_free(json->data.object.pairs);
i = obj->npairs;
json->type = VIR_JSON_TYPE_ARRAY;
json->data.array.nvalues = i;
json->data.array.values = g_steal_pointer(&arraymembers);
}
/**
* virJSONValueObjectDeflatten:
*
* In some cases it's possible to nest JSON objects by prefixing object members
* with the parent object name followed by the dot and then the attribute name
* rather than directly using a nested value object (e.g qemu's JSON
* pseudo-protocol in backing file definition).
*
* This function will attempt to reverse the process and provide a nested json
* hierarchy so that the parsers can be kept simple and we still can use the
* weird syntax some users might use.
*/
virJSONValuePtr
virJSONValueObjectDeflatten(virJSONValuePtr json)
{
virJSONValuePtr deflattened;
if (!(deflattened = virJSONValueObjectDeflattenKeys(json)))
return NULL;
virJSONValueObjectDeflattenArrays(deflattened);
return deflattened;
}