qdev: add string property.

Patchworks-ID: 35755
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAmit Shah <amit.shah@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/qdev-properties.c

@@ -193,6 +193,34 @@ PropertyInfo qdev_prop_hex64 = {
     .print = print_hex64,
 };
 
+/* --- string --- */
+
+static int parse_string(DeviceState *dev, Property *prop, const char *str)
+{
+    char **ptr = qdev_get_prop_ptr(dev, prop);
+
+    if (*ptr)
+        qemu_free(*ptr);
+    *ptr = qemu_strdup(str);
+    return 0;
+}
+
+static int print_string(DeviceState *dev, Property *prop, char *dest, size_t len)
+{
+    char **ptr = qdev_get_prop_ptr(dev, prop);
+    if (!*ptr)
+        return snprintf(dest, len, "<null>");
+    return snprintf(dest, len, "\"%s\"", *ptr);
+}
+
+PropertyInfo qdev_prop_string = {
+    .name  = "string",
+    .type  = PROP_TYPE_STRING,
+    .size  = sizeof(char*),
+    .parse = parse_string,
+    .print = print_string,
+};
+
 /* --- drive --- */
 
 static int parse_drive(DeviceState *dev, Property *prop, const char *str)

hw/qdev.h

@@ -79,6 +79,7 @@ enum PropertyType {
     PROP_TYPE_MACADDR,
     PROP_TYPE_DRIVE,
     PROP_TYPE_CHR,
+    PROP_TYPE_STRING,
     PROP_TYPE_PTR,
 };
 
@@ -186,6 +187,7 @@ extern PropertyInfo qdev_prop_int32;
 extern PropertyInfo qdev_prop_uint64;
 extern PropertyInfo qdev_prop_hex32;
 extern PropertyInfo qdev_prop_hex64;
+extern PropertyInfo qdev_prop_string;
 extern PropertyInfo qdev_prop_chr;
 extern PropertyInfo qdev_prop_ptr;
 extern PropertyInfo qdev_prop_macaddr;
@@ -227,6 +229,8 @@ extern PropertyInfo qdev_prop_pci_devfn;
     DEFINE_PROP(_n, _s, _f, qdev_prop_ptr, void*)
 #define DEFINE_PROP_CHR(_n, _s, _f)             \
     DEFINE_PROP(_n, _s, _f, qdev_prop_chr, CharDriverState*)
+#define DEFINE_PROP_STRING(_n, _s, _f)             \
+    DEFINE_PROP(_n, _s, _f, qdev_prop_string, char*)
 #define DEFINE_PROP_DRIVE(_n, _s, _f)             \
     DEFINE_PROP(_n, _s, _f, qdev_prop_drive, DriveInfo*)
 #define DEFINE_PROP_MACADDR(_n, _s, _f)         \