mirror of https://gitee.com/openkylin/qemu.git
354 lines
8.6 KiB
C
354 lines
8.6 KiB
C
/*
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* Core Definitions for QAPI Visitor Classes
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*
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* Copyright (C) 2012-2016 Red Hat, Inc.
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu-common.h"
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#include "qapi/qmp/qobject.h"
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#include "qapi/qmp/qerror.h"
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#include "qapi/visitor.h"
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#include "qapi/visitor-impl.h"
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void visit_complete(Visitor *v, void *opaque)
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{
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assert(v->type != VISITOR_OUTPUT || v->complete);
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if (v->complete) {
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v->complete(v, opaque);
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}
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}
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void visit_free(Visitor *v)
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{
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if (v) {
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v->free(v);
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}
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}
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void visit_start_struct(Visitor *v, const char *name, void **obj,
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size_t size, Error **errp)
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{
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Error *err = NULL;
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if (obj) {
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assert(size);
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assert(!(v->type & VISITOR_OUTPUT) || *obj);
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}
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v->start_struct(v, name, obj, size, &err);
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if (obj && (v->type & VISITOR_INPUT)) {
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assert(!err != !*obj);
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}
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error_propagate(errp, err);
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}
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void visit_check_struct(Visitor *v, Error **errp)
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{
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if (v->check_struct) {
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v->check_struct(v, errp);
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}
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}
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void visit_end_struct(Visitor *v, void **obj)
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{
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v->end_struct(v, obj);
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}
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void visit_start_list(Visitor *v, const char *name, GenericList **list,
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size_t size, Error **errp)
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{
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Error *err = NULL;
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assert(!list || size >= sizeof(GenericList));
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v->start_list(v, name, list, size, &err);
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if (list && (v->type & VISITOR_INPUT)) {
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assert(!(err && *list));
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}
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error_propagate(errp, err);
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}
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GenericList *visit_next_list(Visitor *v, GenericList *tail, size_t size)
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{
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assert(tail && size >= sizeof(GenericList));
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return v->next_list(v, tail, size);
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}
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void visit_end_list(Visitor *v, void **obj)
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{
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v->end_list(v, obj);
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}
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void visit_start_alternate(Visitor *v, const char *name,
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GenericAlternate **obj, size_t size,
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bool promote_int, Error **errp)
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{
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Error *err = NULL;
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assert(obj && size >= sizeof(GenericAlternate));
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assert(!(v->type & VISITOR_OUTPUT) || *obj);
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if (v->start_alternate) {
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v->start_alternate(v, name, obj, size, promote_int, &err);
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}
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if (v->type & VISITOR_INPUT) {
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assert(v->start_alternate && !err != !*obj);
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}
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error_propagate(errp, err);
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}
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void visit_end_alternate(Visitor *v, void **obj)
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{
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if (v->end_alternate) {
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v->end_alternate(v, obj);
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}
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}
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bool visit_optional(Visitor *v, const char *name, bool *present)
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{
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if (v->optional) {
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v->optional(v, name, present);
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}
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return *present;
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}
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bool visit_is_input(Visitor *v)
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{
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return v->type == VISITOR_INPUT;
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}
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void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp)
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{
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assert(obj);
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v->type_int64(v, name, obj, errp);
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}
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static void visit_type_uintN(Visitor *v, uint64_t *obj, const char *name,
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uint64_t max, const char *type, Error **errp)
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{
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Error *err = NULL;
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uint64_t value = *obj;
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v->type_uint64(v, name, &value, &err);
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if (err) {
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error_propagate(errp, err);
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} else if (value > max) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
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name ? name : "null", type);
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} else {
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*obj = value;
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}
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}
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void visit_type_uint8(Visitor *v, const char *name, uint8_t *obj,
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Error **errp)
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{
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uint64_t value = *obj;
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visit_type_uintN(v, &value, name, UINT8_MAX, "uint8_t", errp);
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*obj = value;
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}
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void visit_type_uint16(Visitor *v, const char *name, uint16_t *obj,
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Error **errp)
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{
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uint64_t value = *obj;
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visit_type_uintN(v, &value, name, UINT16_MAX, "uint16_t", errp);
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*obj = value;
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}
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void visit_type_uint32(Visitor *v, const char *name, uint32_t *obj,
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Error **errp)
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{
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uint64_t value = *obj;
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visit_type_uintN(v, &value, name, UINT32_MAX, "uint32_t", errp);
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*obj = value;
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}
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void visit_type_uint64(Visitor *v, const char *name, uint64_t *obj,
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Error **errp)
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{
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assert(obj);
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v->type_uint64(v, name, obj, errp);
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}
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static void visit_type_intN(Visitor *v, int64_t *obj, const char *name,
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int64_t min, int64_t max, const char *type,
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Error **errp)
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{
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Error *err = NULL;
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int64_t value = *obj;
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v->type_int64(v, name, &value, &err);
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if (err) {
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error_propagate(errp, err);
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} else if (value < min || value > max) {
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error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
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name ? name : "null", type);
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} else {
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*obj = value;
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}
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}
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void visit_type_int8(Visitor *v, const char *name, int8_t *obj, Error **errp)
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{
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int64_t value = *obj;
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visit_type_intN(v, &value, name, INT8_MIN, INT8_MAX, "int8_t", errp);
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*obj = value;
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}
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void visit_type_int16(Visitor *v, const char *name, int16_t *obj,
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Error **errp)
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{
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int64_t value = *obj;
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visit_type_intN(v, &value, name, INT16_MIN, INT16_MAX, "int16_t", errp);
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*obj = value;
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}
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void visit_type_int32(Visitor *v, const char *name, int32_t *obj,
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Error **errp)
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{
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int64_t value = *obj;
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visit_type_intN(v, &value, name, INT32_MIN, INT32_MAX, "int32_t", errp);
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*obj = value;
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}
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void visit_type_int64(Visitor *v, const char *name, int64_t *obj,
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Error **errp)
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{
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assert(obj);
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v->type_int64(v, name, obj, errp);
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}
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void visit_type_size(Visitor *v, const char *name, uint64_t *obj,
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Error **errp)
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{
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assert(obj);
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if (v->type_size) {
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v->type_size(v, name, obj, errp);
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} else {
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v->type_uint64(v, name, obj, errp);
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}
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}
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void visit_type_bool(Visitor *v, const char *name, bool *obj, Error **errp)
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{
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assert(obj);
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v->type_bool(v, name, obj, errp);
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}
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void visit_type_str(Visitor *v, const char *name, char **obj, Error **errp)
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{
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Error *err = NULL;
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assert(obj);
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/* TODO: Fix callers to not pass NULL when they mean "", so that we
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* can enable:
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assert(!(v->type & VISITOR_OUTPUT) || *obj);
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*/
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v->type_str(v, name, obj, &err);
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if (v->type & VISITOR_INPUT) {
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assert(!err != !*obj);
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}
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error_propagate(errp, err);
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}
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void visit_type_number(Visitor *v, const char *name, double *obj,
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Error **errp)
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{
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assert(obj);
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v->type_number(v, name, obj, errp);
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}
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void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp)
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{
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Error *err = NULL;
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assert(obj);
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assert(v->type != VISITOR_OUTPUT || *obj);
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v->type_any(v, name, obj, &err);
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if (v->type == VISITOR_INPUT) {
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assert(!err != !*obj);
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}
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error_propagate(errp, err);
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}
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void visit_type_null(Visitor *v, const char *name, Error **errp)
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{
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v->type_null(v, name, errp);
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}
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static void output_type_enum(Visitor *v, const char *name, int *obj,
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const char *const strings[], Error **errp)
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{
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int i = 0;
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int value = *obj;
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char *enum_str;
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while (strings[i++] != NULL);
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if (value < 0 || value >= i - 1) {
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error_setg(errp, QERR_INVALID_PARAMETER, name ? name : "null");
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return;
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}
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enum_str = (char *)strings[value];
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visit_type_str(v, name, &enum_str, errp);
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}
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static void input_type_enum(Visitor *v, const char *name, int *obj,
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const char *const strings[], Error **errp)
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{
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Error *local_err = NULL;
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int64_t value = 0;
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char *enum_str;
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visit_type_str(v, name, &enum_str, &local_err);
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if (local_err) {
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error_propagate(errp, local_err);
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return;
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}
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while (strings[value] != NULL) {
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if (strcmp(strings[value], enum_str) == 0) {
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break;
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}
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value++;
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}
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if (strings[value] == NULL) {
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error_setg(errp, QERR_INVALID_PARAMETER, enum_str);
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g_free(enum_str);
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return;
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}
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g_free(enum_str);
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*obj = value;
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}
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void visit_type_enum(Visitor *v, const char *name, int *obj,
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const char *const strings[], Error **errp)
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{
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assert(obj && strings);
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switch (v->type) {
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case VISITOR_INPUT:
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input_type_enum(v, name, obj, strings, errp);
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break;
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case VISITOR_OUTPUT:
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output_type_enum(v, name, obj, strings, errp);
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break;
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case VISITOR_CLONE:
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/* nothing further to do, scalar value was already copied by
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* g_memdup() during visit_start_*() */
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break;
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case VISITOR_DEALLOC:
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/* nothing to deallocate for a scalar */
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break;
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}
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}
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