qapi: allow sharing enum implementation across visitors

Most visitors will use the same code for enum parsing.  Move it to
the core.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

qapi/qapi-visit-core.c

@@ -12,6 +12,7 @@
  */
 
 #include "qapi/qapi-visit-core.h"
+#include "qapi/qapi-visit-impl.h"
 
 void visit_start_handle(Visitor *v, void **obj, const char *kind,
                         const char *name, Error **errp)
@@ -116,3 +117,53 @@ void visit_type_number(Visitor *v, double *obj, const char *name, Error **errp)
         v->type_number(v, obj, name, errp);
     }
 }
+
+void output_type_enum(Visitor *v, int *obj, const char *strings[],
+                      const char *kind, const char *name,
+                      Error **errp)
+{
+    int i = 0;
+    int value = *obj;
+    char *enum_str;
+
+    assert(strings);
+    while (strings[i++] != NULL);
+    if (value < 0 || value >= i - 1) {
+        error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
+        return;
+    }
+
+    enum_str = (char *)strings[value];
+    visit_type_str(v, &enum_str, name, errp);
+}
+
+void input_type_enum(Visitor *v, int *obj, const char *strings[],
+                     const char *kind, const char *name,
+                     Error **errp)
+{
+    int64_t value = 0;
+    char *enum_str;
+
+    assert(strings);
+
+    visit_type_str(v, &enum_str, name, errp);
+    if (error_is_set(errp)) {
+        return;
+    }
+
+    while (strings[value] != NULL) {
+        if (strcmp(strings[value], enum_str) == 0) {
+            break;
+        }
+        value++;
+    }
+
+    if (strings[value] == NULL) {
+        error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
+        g_free(enum_str);
+        return;
+    }
+
+    g_free(enum_str);
+    *obj = value;
+}

qapi/qapi-visit-impl.h

+/*
+ * Core Definitions for QAPI Visitor implementations
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * Author: Paolo Bonizni <pbonzini@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING.LIB file in the top-level directory.
+ *
+ */
+#ifndef QAPI_VISITOR_IMPL_H
+#define QAPI_VISITOR_IMPL_H
+
+#include "qapi/qapi-types-core.h"
+#include "qapi/qapi-visit-core.h"
+
+void input_type_enum(Visitor *v, int *obj, const char *strings[],
+                     const char *kind, const char *name, Error **errp);
+void output_type_enum(Visitor *v, int *obj, const char *strings[],
+                      const char *kind, const char *name, Error **errp);
+
+#endif

qapi/qmp-input-visitor.c

@@ -12,6 +12,7 @@
  */
 
 #include "qmp-input-visitor.h"
+#include "qapi/qapi-visit-impl.h"
 #include "qemu-queue.h"
 #include "qemu-common.h"
 #include "qemu-objects.h"
@@ -217,37 +218,6 @@ static void qmp_input_type_number(Visitor *v, double *obj, const char *name,
     *obj = qfloat_get_double(qobject_to_qfloat(qobj));
 }
 
-static void qmp_input_type_enum(Visitor *v, int *obj, const char *strings[],
-                                const char *kind, const char *name,
-                                Error **errp)
-{
-    int64_t value = 0;
-    char *enum_str;
-
-    assert(strings);
-
-    qmp_input_type_str(v, &enum_str, name, errp);
-    if (error_is_set(errp)) {
-        return;
-    }
-
-    while (strings[value] != NULL) {
-        if (strcmp(strings[value], enum_str) == 0) {
-            break;
-        }
-        value++;
-    }
-
-    if (strings[value] == NULL) {
-        error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
-        g_free(enum_str);
-        return;
-    }
-
-    g_free(enum_str);
-    *obj = value;
-}
-
 static void qmp_input_start_optional(Visitor *v, bool *present,
                                      const char *name, Error **errp)
 {
@@ -288,7 +258,7 @@ QmpInputVisitor *qmp_input_visitor_new(QObject *obj)
     v->visitor.start_list = qmp_input_start_list;
     v->visitor.next_list = qmp_input_next_list;
     v->visitor.end_list = qmp_input_end_list;
-    v->visitor.type_enum = qmp_input_type_enum;
+    v->visitor.type_enum = input_type_enum;
     v->visitor.type_int = qmp_input_type_int;
     v->visitor.type_bool = qmp_input_type_bool;
     v->visitor.type_str = qmp_input_type_str;

qapi/qmp-output-visitor.c

@@ -12,6 +12,7 @@
  */
 
 #include "qmp-output-visitor.h"
+#include "qapi/qapi-visit-impl.h"
 #include "qemu-queue.h"
 #include "qemu-common.h"
 #include "qemu-objects.h"
@@ -180,25 +181,6 @@ static void qmp_output_type_number(Visitor *v, double *obj, const char *name,
     qmp_output_add(qov, name, qfloat_from_double(*obj));
 }
 
-static void qmp_output_type_enum(Visitor *v, int *obj, const char *strings[],
-                                 const char *kind, const char *name,
-                                 Error **errp)
-{
-    int i = 0;
-    int value = *obj;
-    char *enum_str;
-
-    assert(strings);
-    while (strings[i++] != NULL);
-    if (value < 0 || value >= i - 1) {
-        error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
-        return;
-    }
-
-    enum_str = (char *)strings[value];
-    qmp_output_type_str(v, &enum_str, name, errp);
-}
-
 QObject *qmp_output_get_qobject(QmpOutputVisitor *qov)
 {
     QObject *obj = qmp_output_first(qov);
@@ -239,7 +221,7 @@ QmpOutputVisitor *qmp_output_visitor_new(void)
     v->visitor.start_list = qmp_output_start_list;
     v->visitor.next_list = qmp_output_next_list;
     v->visitor.end_list = qmp_output_end_list;
-    v->visitor.type_enum = qmp_output_type_enum;
+    v->visitor.type_enum = output_type_enum;
     v->visitor.type_int = qmp_output_type_int;
     v->visitor.type_bool = qmp_output_type_bool;
     v->visitor.type_str = qmp_output_type_str;