qemu/qapi/qapi-visit-core.c
Marc-André Lureau f7abe0ecd4 qapi: Change data type of the FOO_lookup generated for enum FOO
Currently, a FOO_lookup is an array of strings terminated by a NULL
sentinel.

A future patch will generate enums with "holes".  NULL-termination
will cease to work then.

To prepare for that, store the length in the FOO_lookup by wrapping it
in a struct and adding a member for the length.

The sentinel will be dropped next.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170822132255.23945-13-marcandre.lureau@redhat.com>
[Basically redone]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1503564371-26090-16-git-send-email-armbru@redhat.com>
[Rebased]
2017-09-04 13:09:13 +02:00

399 lines
9.9 KiB
C

/*
* Core Definitions for QAPI Visitor Classes
*
* Copyright (C) 2012-2016 Red Hat, Inc.
* Copyright IBM, Corp. 2011
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.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.
*
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "qapi/qmp/qobject.h"
#include "qapi/qmp/qerror.h"
#include "qapi/visitor.h"
#include "qapi/visitor-impl.h"
#include "trace.h"
void visit_complete(Visitor *v, void *opaque)
{
assert(v->type != VISITOR_OUTPUT || v->complete);
trace_visit_complete(v, opaque);
if (v->complete) {
v->complete(v, opaque);
}
}
void visit_free(Visitor *v)
{
trace_visit_free(v);
if (v) {
v->free(v);
}
}
void visit_start_struct(Visitor *v, const char *name, void **obj,
size_t size, Error **errp)
{
Error *err = NULL;
trace_visit_start_struct(v, name, obj, size);
if (obj) {
assert(size);
assert(!(v->type & VISITOR_OUTPUT) || *obj);
}
v->start_struct(v, name, obj, size, &err);
if (obj && (v->type & VISITOR_INPUT)) {
assert(!err != !*obj);
}
error_propagate(errp, err);
}
void visit_check_struct(Visitor *v, Error **errp)
{
trace_visit_check_struct(v);
if (v->check_struct) {
v->check_struct(v, errp);
}
}
void visit_end_struct(Visitor *v, void **obj)
{
trace_visit_end_struct(v, obj);
v->end_struct(v, obj);
}
void visit_start_list(Visitor *v, const char *name, GenericList **list,
size_t size, Error **errp)
{
Error *err = NULL;
assert(!list || size >= sizeof(GenericList));
trace_visit_start_list(v, name, list, size);
v->start_list(v, name, list, size, &err);
if (list && (v->type & VISITOR_INPUT)) {
assert(!(err && *list));
}
error_propagate(errp, err);
}
GenericList *visit_next_list(Visitor *v, GenericList *tail, size_t size)
{
assert(tail && size >= sizeof(GenericList));
trace_visit_next_list(v, tail, size);
return v->next_list(v, tail, size);
}
void visit_check_list(Visitor *v, Error **errp)
{
trace_visit_check_list(v);
if (v->check_list) {
v->check_list(v, errp);
}
}
void visit_end_list(Visitor *v, void **obj)
{
trace_visit_end_list(v, obj);
v->end_list(v, obj);
}
void visit_start_alternate(Visitor *v, const char *name,
GenericAlternate **obj, size_t size,
Error **errp)
{
Error *err = NULL;
assert(obj && size >= sizeof(GenericAlternate));
assert(!(v->type & VISITOR_OUTPUT) || *obj);
trace_visit_start_alternate(v, name, obj, size);
if (v->start_alternate) {
v->start_alternate(v, name, obj, size, &err);
}
if (v->type & VISITOR_INPUT) {
assert(v->start_alternate && !err != !*obj);
}
error_propagate(errp, err);
}
void visit_end_alternate(Visitor *v, void **obj)
{
trace_visit_end_alternate(v, obj);
if (v->end_alternate) {
v->end_alternate(v, obj);
}
}
bool visit_optional(Visitor *v, const char *name, bool *present)
{
trace_visit_optional(v, name, present);
if (v->optional) {
v->optional(v, name, present);
}
return *present;
}
bool visit_is_input(Visitor *v)
{
return v->type == VISITOR_INPUT;
}
void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp)
{
assert(obj);
trace_visit_type_int(v, name, obj);
v->type_int64(v, name, obj, errp);
}
static void visit_type_uintN(Visitor *v, uint64_t *obj, const char *name,
uint64_t max, const char *type, Error **errp)
{
Error *err = NULL;
uint64_t value = *obj;
v->type_uint64(v, name, &value, &err);
if (err) {
error_propagate(errp, err);
} else if (value > max) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", type);
} else {
*obj = value;
}
}
void visit_type_uint8(Visitor *v, const char *name, uint8_t *obj,
Error **errp)
{
uint64_t value;
trace_visit_type_uint8(v, name, obj);
value = *obj;
visit_type_uintN(v, &value, name, UINT8_MAX, "uint8_t", errp);
*obj = value;
}
void visit_type_uint16(Visitor *v, const char *name, uint16_t *obj,
Error **errp)
{
uint64_t value;
trace_visit_type_uint16(v, name, obj);
value = *obj;
visit_type_uintN(v, &value, name, UINT16_MAX, "uint16_t", errp);
*obj = value;
}
void visit_type_uint32(Visitor *v, const char *name, uint32_t *obj,
Error **errp)
{
uint64_t value;
trace_visit_type_uint32(v, name, obj);
value = *obj;
visit_type_uintN(v, &value, name, UINT32_MAX, "uint32_t", errp);
*obj = value;
}
void visit_type_uint64(Visitor *v, const char *name, uint64_t *obj,
Error **errp)
{
assert(obj);
trace_visit_type_uint64(v, name, obj);
v->type_uint64(v, name, obj, errp);
}
static void visit_type_intN(Visitor *v, int64_t *obj, const char *name,
int64_t min, int64_t max, const char *type,
Error **errp)
{
Error *err = NULL;
int64_t value = *obj;
v->type_int64(v, name, &value, &err);
if (err) {
error_propagate(errp, err);
} else if (value < min || value > max) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", type);
} else {
*obj = value;
}
}
void visit_type_int8(Visitor *v, const char *name, int8_t *obj, Error **errp)
{
int64_t value;
trace_visit_type_int8(v, name, obj);
value = *obj;
visit_type_intN(v, &value, name, INT8_MIN, INT8_MAX, "int8_t", errp);
*obj = value;
}
void visit_type_int16(Visitor *v, const char *name, int16_t *obj,
Error **errp)
{
int64_t value;
trace_visit_type_int16(v, name, obj);
value = *obj;
visit_type_intN(v, &value, name, INT16_MIN, INT16_MAX, "int16_t", errp);
*obj = value;
}
void visit_type_int32(Visitor *v, const char *name, int32_t *obj,
Error **errp)
{
int64_t value;
trace_visit_type_int32(v, name, obj);
value = *obj;
visit_type_intN(v, &value, name, INT32_MIN, INT32_MAX, "int32_t", errp);
*obj = value;
}
void visit_type_int64(Visitor *v, const char *name, int64_t *obj,
Error **errp)
{
assert(obj);
trace_visit_type_int64(v, name, obj);
v->type_int64(v, name, obj, errp);
}
void visit_type_size(Visitor *v, const char *name, uint64_t *obj,
Error **errp)
{
assert(obj);
trace_visit_type_size(v, name, obj);
if (v->type_size) {
v->type_size(v, name, obj, errp);
} else {
v->type_uint64(v, name, obj, errp);
}
}
void visit_type_bool(Visitor *v, const char *name, bool *obj, Error **errp)
{
assert(obj);
trace_visit_type_bool(v, name, obj);
v->type_bool(v, name, obj, errp);
}
void visit_type_str(Visitor *v, const char *name, char **obj, Error **errp)
{
Error *err = NULL;
assert(obj);
/* TODO: Fix callers to not pass NULL when they mean "", so that we
* can enable:
assert(!(v->type & VISITOR_OUTPUT) || *obj);
*/
trace_visit_type_str(v, name, obj);
v->type_str(v, name, obj, &err);
if (v->type & VISITOR_INPUT) {
assert(!err != !*obj);
}
error_propagate(errp, err);
}
void visit_type_number(Visitor *v, const char *name, double *obj,
Error **errp)
{
assert(obj);
trace_visit_type_number(v, name, obj);
v->type_number(v, name, obj, errp);
}
void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp)
{
Error *err = NULL;
assert(obj);
assert(v->type != VISITOR_OUTPUT || *obj);
trace_visit_type_any(v, name, obj);
v->type_any(v, name, obj, &err);
if (v->type == VISITOR_INPUT) {
assert(!err != !*obj);
}
error_propagate(errp, err);
}
void visit_type_null(Visitor *v, const char *name, QNull **obj,
Error **errp)
{
trace_visit_type_null(v, name, obj);
v->type_null(v, name, obj, errp);
}
static void output_type_enum(Visitor *v, const char *name, int *obj,
const QEnumLookup *lookup, Error **errp)
{
int value = *obj;
char *enum_str;
/*
* TODO why is this an error, not an assertion? If assertion:
* delete, and rely on qapi_enum_lookup()
*/
if (value < 0 || value >= lookup->size) {
error_setg(errp, QERR_INVALID_PARAMETER, name ? name : "null");
return;
}
enum_str = (char *)qapi_enum_lookup(lookup, value);
visit_type_str(v, name, &enum_str, errp);
}
static void input_type_enum(Visitor *v, const char *name, int *obj,
const QEnumLookup *lookup, Error **errp)
{
Error *local_err = NULL;
int64_t value;
char *enum_str;
visit_type_str(v, name, &enum_str, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
value = qapi_enum_parse(lookup, enum_str, -1, NULL);
if (value < 0) {
error_setg(errp, QERR_INVALID_PARAMETER, enum_str);
g_free(enum_str);
return;
}
g_free(enum_str);
*obj = value;
}
void visit_type_enum(Visitor *v, const char *name, int *obj,
const QEnumLookup *lookup, Error **errp)
{
assert(obj && lookup);
trace_visit_type_enum(v, name, obj);
switch (v->type) {
case VISITOR_INPUT:
input_type_enum(v, name, obj, lookup, errp);
break;
case VISITOR_OUTPUT:
output_type_enum(v, name, obj, lookup, errp);
break;
case VISITOR_CLONE:
/* nothing further to do, scalar value was already copied by
* g_memdup() during visit_start_*() */
break;
case VISITOR_DEALLOC:
/* nothing to deallocate for a scalar */
break;
}
}