Revert "Remove virJSONValueNewStringLen"

This reverts commit 8f802c6d86.

Jansson cannot parse QEMU's quirky JSON.
Revert back to yajl.

https://bugzilla.redhat.com/show_bug.cgi?id=1614569

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>

src/libvirt_private.syms

@@ -2096,6 +2096,7 @@ virJSONValueNewNumberUint;
 virJSONValueNewNumberUlong;
 virJSONValueNewObject;
 virJSONValueNewString;
+virJSONValueNewStringLen;
 virJSONValueObjectAdd;
 virJSONValueObjectAddVArgs;
 virJSONValueObjectAppend;

src/util/virjson.c

@@ -420,6 +420,28 @@ virJSONValueNewString(const char *data)
 }
 
 
+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;
+    if (VIR_STRNDUP(val->data.string, data, length) < 0) {
+        VIR_FREE(val);
+        return NULL;
+    }
+
+    return val;
+}
+
+
 static virJSONValuePtr
 virJSONValueNewNumber(const char *data)
 {

src/util/virjson.h

@@ -59,6 +59,7 @@ int virJSONValueObjectAddVArgs(virJSONValuePtr obj, va_list args)
 
 
 virJSONValuePtr virJSONValueNewString(const char *data);
+virJSONValuePtr virJSONValueNewStringLen(const char *data, size_t length);
 virJSONValuePtr virJSONValueNewNumberInt(int data);
 virJSONValuePtr virJSONValueNewNumberUint(unsigned int data);
 virJSONValuePtr virJSONValueNewNumberLong(long long data);