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util: json: make value object creator universal by supporting adding

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To allow constructing of value objects stepwise explode the helper into
separate steps and allow appending into existing value objects.
This commit is contained in:
Peter Krempa 2015-01-12 16:35:17 +01:00
parent d793aeedf2
commit f0363aa145
3 changed files with 57 additions and 26 deletions
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2
src/libvirt_private.syms
View File

@ -1534,6 +1534,8 @@ virJSONValueNewNumberUlong;
virJSONValueNewObject;
virJSONValueNewString;
virJSONValueNewStringLen;
virJSONValueObjectAdd;
virJSONValueObjectAddVArgs;
virJSONValueObjectAppend;
virJSONValueObjectAppendBoolean;
virJSONValueObjectAppendNull;

76
src/util/virjson.c
View File

@ -64,12 +64,11 @@ struct _virJSONParser {
/**
* virJSONValueObjectCreateVArgs:
* @obj: returns the created JSON object
* @...: a key-value argument pairs, terminated by NULL
* virJSONValueObjectAddVArgs:
* @obj: JSON object to add the values to
* @args: a key-value argument pairs, terminated by NULL
*
* Creates a JSON value object filled with key-value pairs supplied as variable
* argument list.
* 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:
@ -104,22 +103,17 @@ struct _virJSONParser {
* 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 (@obj will be NULL).
* in case of no error but nothing was filled.
*/
int
virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
virJSONValueObjectAddVArgs(virJSONValuePtr obj,
va_list args)
{
virJSONValuePtr jargs = NULL;
char type;
char *key;
int ret = -1;
int rc;
*obj = NULL;
if (!(jargs = virJSONValueNewObject()))
goto cleanup;
while ((key = va_arg(args, char *)) != NULL) {
if (strlen(key) < 3) {
@ -146,7 +140,7 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
key);
goto cleanup;
}
rc = virJSONValueObjectAppendString(jargs, key, val);
rc = virJSONValueObjectAppendString(obj, key, val);
} break;
case 'z':
@ -165,7 +159,7 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
if (!val && (type == 'z' || type == 'y'))
continue;
rc = virJSONValueObjectAppendNumberInt(jargs, key, val);
rc = virJSONValueObjectAppendNumberInt(obj, key, val);
} break;
case 'p':
@ -175,7 +169,7 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
if (!val && type == 'p')
continue;
rc = virJSONValueObjectAppendNumberUint(jargs, key, val);
rc = virJSONValueObjectAppendNumberUint(obj, key, val);
} break;
case 'Z':
@ -194,7 +188,7 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
if (!val && (type == 'Z' || type == 'Y'))
continue;
rc = virJSONValueObjectAppendNumberLong(jargs, key, val);
rc = virJSONValueObjectAppendNumberLong(obj, key, val);
} break;
case 'P':
@ -209,12 +203,12 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
if (!val && type == 'P')
continue;
rc = virJSONValueObjectAppendNumberLong(jargs, key, val);
rc = virJSONValueObjectAppendNumberLong(obj, key, val);
} break;
case 'd': {
double val = va_arg(args, double);
rc = virJSONValueObjectAppendNumberDouble(jargs, key, val);
rc = virJSONValueObjectAppendNumberDouble(obj, key, val);
} break;
case 'B':
@ -224,11 +218,11 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
if (!val && type == 'B')
continue;
rc = virJSONValueObjectAppendBoolean(jargs, key, val);
rc = virJSONValueObjectAppendBoolean(obj, key, val);
} break;
case 'n': {
rc = virJSONValueObjectAppendNull(jargs, key);
rc = virJSONValueObjectAppendNull(obj, key);
} break;
case 'A':
@ -245,7 +239,7 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
goto cleanup;
}
rc = virJSONValueObjectAppend(jargs, key, val);
rc = virJSONValueObjectAppend(obj, key, val);
} break;
default:
@ -259,17 +253,47 @@ virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
}
/* verify that we added at least one key-value pair */
if (virJSONValueObjectKeysNumber(jargs) == 0) {
if (virJSONValueObjectKeysNumber(obj) == 0) {
ret = 0;
goto cleanup;
}
*obj = jargs;
jargs = NULL;
ret = 1;
cleanup:
virJSONValueFree(jargs);
return ret;
}
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;
if (!(*obj = virJSONValueNewObject()))
return -1;
/* free the object on error, or if no value objects were added */
if ((ret = virJSONValueObjectAddVArgs(*obj, args)) <= 0) {
virJSONValueFree(*obj);
*obj = NULL;
}
return ret;
}

5
src/util/virjson.h
View File

@ -85,6 +85,11 @@ int virJSONValueObjectCreate(virJSONValuePtr *obj, ...)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;
int virJSONValueObjectCreateVArgs(virJSONValuePtr *obj, va_list args)
ATTRIBUTE_NONNULL(1);
int virJSONValueObjectAdd(virJSONValuePtr obj, ...)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;
int virJSONValueObjectAddVArgs(virJSONValuePtr obj, va_list args)
ATTRIBUTE_NONNULL(1);
virJSONValuePtr virJSONValueNewString(const char *data);
virJSONValuePtr virJSONValueNewStringLen(const char *data, size_t length);