unicorn/qemu/qapi/qapi-visit-core.c
Eric Blake 3aba81d5aa
qapi: Drop unused error argument for list and implicit struct
No backend was setting an error when ending the visit of a list or
implicit struct, or when moving to the next list node. Make the
callers a bit easier to follow by making this a part of the contract,
and removing the errp argument - callers can then unconditionally end
an object as part of cleanup without having to think about whether a
second error is dominated by a first, because there is no second
error.

A later patch will then tackle the larger task of splitting
visit_end_struct(), which can indeed set an error.

Backports commit 08f9541dec51700abef0c37994213164ca4e4fc9 from qemu
2018-02-19 12:59:54 -05:00

309 lines
7.7 KiB
C

/*
* Core Definitions for QAPI Visitor Classes
*
* 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 "qemu-common.h"
#include "qapi/qmp/qobject.h"
#include "qapi/qmp/qerror.h"
#include "qapi/visitor.h"
#include "qapi/visitor-impl.h"
void visit_start_struct(Visitor *v, void **obj, const char *kind,
const char *name, size_t size, Error **errp)
{
v->start_struct(v, obj, kind, name, size, errp);
}
void visit_end_struct(Visitor *v, Error **errp)
{
v->end_struct(v, errp);
}
void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
Error **errp)
{
if (v->start_implicit_struct) {
v->start_implicit_struct(v, obj, size, errp);
}
}
void visit_end_implicit_struct(Visitor *v)
{
if (v->end_implicit_struct) {
v->end_implicit_struct(v);
}
}
void visit_start_list(Visitor *v, const char *name, Error **errp)
{
v->start_list(v, name, errp);
}
GenericList *visit_next_list(Visitor *v, GenericList **list)
{
return v->next_list(v, list);
}
void visit_end_list(Visitor *v)
{
v->end_list(v);
}
bool visit_start_union(Visitor *v, bool data_present, Error **errp)
{
if (v->start_union) {
return v->start_union(v, data_present, errp);
}
return true;
}
void visit_end_union(Visitor *v, bool data_present, Error **errp)
{
if (v->end_union) {
v->end_union(v, data_present, errp);
}
}
void visit_optional(Visitor *v, bool *present, const char *name,
Error **errp)
{
if (v->optional) {
v->optional(v, present, name, errp);
}
}
void visit_get_next_type(Visitor *v, int *obj, const int *qtypes,
const char *name, Error **errp)
{
if (v->get_next_type) {
v->get_next_type(v, obj, qtypes, name, errp);
}
}
void visit_type_enum(Visitor *v, int *obj, const char *strings[],
const char *kind, const char *name, Error **errp)
{
v->type_enum(v, obj, strings, kind, name, errp);
}
void visit_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp)
{
v->type_int64(v, obj, name, errp);
}
void visit_type_uint8(Visitor *v, uint8_t *obj, const char *name, Error **errp)
{
uint64_t value;
if (v->type_uint8) {
v->type_uint8(v, obj, name, errp);
} else {
value = *obj;
v->type_uint64(v, &value, name, errp);
if (value > UINT8_MAX) {
/* FIXME questionable reuse of errp if callback changed
value on error */
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", "uint8_t");
return;
}
*obj = (uint8_t)value;
}
}
void visit_type_uint16(Visitor *v, uint16_t *obj, const char *name, Error **errp)
{
uint64_t value;
if (v->type_uint16) {
v->type_uint16(v, obj, name, errp);
} else {
value = *obj;
v->type_uint64(v, &value, name, errp);
if (value > UINT16_MAX) {
/* FIXME questionable reuse of errp if callback changed
value on error */
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", "uint16_t");
return;
}
*obj = (uint16_t)value;
}
}
void visit_type_uint32(Visitor *v, uint32_t *obj, const char *name, Error **errp)
{
uint64_t value;
if (v->type_uint32) {
v->type_uint32(v, obj, name, errp);
} else {
value = *obj;
v->type_uint64(v, &value, name, errp);
if (value > UINT32_MAX) {
/* FIXME questionable reuse of errp if callback changed
value on error */
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", "uint32_t");
return;
}
*obj = (uint32_t)value;
}
}
void visit_type_uint64(Visitor *v, uint64_t *obj, const char *name, Error **errp)
{
v->type_uint64(v, obj, name, errp);
}
void visit_type_int8(Visitor *v, int8_t *obj, const char *name, Error **errp)
{
int64_t value;
if (v->type_int8) {
v->type_int8(v, obj, name, errp);
} else {
value = *obj;
v->type_int64(v, &value, name, errp);
if (value < INT8_MIN || value > INT8_MAX) {
/* FIXME questionable reuse of errp if callback changed
value on error */
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", "int8_t");
return;
}
*obj = (int8_t)value;
}
}
void visit_type_int16(Visitor *v, int16_t *obj, const char *name, Error **errp)
{
int64_t value;
if (v->type_int16) {
v->type_int16(v, obj, name, errp);
} else {
value = *obj;
v->type_int64(v, &value, name, errp);
if (value < INT16_MIN || value > INT16_MAX) {
/* FIXME questionable reuse of errp if callback changed
value on error */
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", "int16_t");
return;
}
*obj = (int16_t)value;
}
}
void visit_type_int32(Visitor *v, int32_t *obj, const char *name, Error **errp)
{
int64_t value;
if (v->type_int32) {
v->type_int32(v, obj, name, errp);
} else {
value = *obj;
v->type_int64(v, &value, name, errp);
if (value < INT32_MIN || value > INT32_MAX) {
/* FIXME questionable reuse of errp if callback changed
value on error */
error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
name ? name : "null", "int32_t");
return;
}
*obj = (int32_t)value;
}
}
void visit_type_int64(Visitor *v, int64_t *obj, const char *name, Error **errp)
{
v->type_int64(v, obj, name, errp);
}
void visit_type_size(Visitor *v, uint64_t *obj, const char *name, Error **errp)
{
if (v->type_size) {
v->type_size(v, obj, name, errp);
} else {
v->type_uint64(v, obj, name, errp);
}
}
void visit_type_bool(Visitor *v, bool *obj, const char *name, Error **errp)
{
v->type_bool(v, obj, name, errp);
}
void visit_type_str(Visitor *v, char **obj, const char *name, Error **errp)
{
v->type_str(v, obj, name, errp);
}
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_setg(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)
{
Error *local_err = NULL;
int64_t value = 0;
char *enum_str;
assert(strings);
visit_type_str(v, &enum_str, name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
while (strings[value] != NULL) {
if (strcmp(strings[value], enum_str) == 0) {
break;
}
value++;
}
if (strings[value] == NULL) {
error_setg(errp, QERR_INVALID_PARAMETER, enum_str);
g_free(enum_str);
return;
}
g_free(enum_str);
*obj = (int)value;
}