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/*
* HMP string output Visitor
*
* Copyright Yandex N.V., 2021
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qapi/hmp-output-visitor.h"
#include "qapi/visitor-impl.h"
struct HMPOutputVisitor {
Visitor visitor;
char **result;
GString *buffer;
bool is_continue;
};
static HMPOutputVisitor *to_hov(Visitor *v)
{
return container_of(v, HMPOutputVisitor, visitor);
}
static void hmp_output_append_formatted(Visitor *v, const char *fmt, ...)
{
HMPOutputVisitor *ov = to_hov(v);
va_list args;
if (ov->is_continue) {
g_string_append(ov->buffer, ",");
} else {
ov->is_continue = true;
}
va_start(args, fmt);
g_string_append_vprintf(ov->buffer, fmt, args);
va_end(args);
}
static void hmp_output_skip_comma(Visitor *v)
{
HMPOutputVisitor *ov = to_hov(v);
ov->is_continue = false;
}
static bool hmp_output_start_struct(Visitor *v, const char *name,
void **obj, size_t unused, Error **errp)
{
return true;
}
static void hmp_output_end_struct(Visitor *v, void **obj) {}
static bool hmp_output_start_list(Visitor *v, const char *name,
GenericList **listp, size_t size,
Error **errp)
{
hmp_output_append_formatted(v, "%s=[", name);
/* First element in array without comma before it */
hmp_output_skip_comma(v);
return true;
}
static GenericList *hmp_output_next_list(Visitor *v, GenericList *tail,
size_t size)
{
return tail->next;
}
static void hmp_output_end_list(Visitor *v, void **obj)
{
/* Don't need comma after last array element */
hmp_output_skip_comma(v);
hmp_output_append_formatted(v, "]");
}
static bool hmp_output_type_int64(Visitor *v, const char *name,
int64_t *obj, Error **errp)
{
hmp_output_append_formatted(v, "%s=%" PRId64, name, *obj);
return true;
}
static bool hmp_output_type_uint64(Visitor *v, const char *name,
uint64_t *obj, Error **errp)
{
hmp_output_append_formatted(v, "%s=%" PRIu64, name, *obj);
return true;
}
static bool hmp_output_type_bool(Visitor *v, const char *name, bool *obj,
Error **errp)
{
hmp_output_append_formatted(v, "%s=%s", name, *obj ? "true" : "false");
return true;
}
static bool hmp_output_type_str(Visitor *v, const char *name, char **obj,
Error **errp)
{
/* Skip already printed or unused fields */
if (!*obj || g_str_equal(name, "id") || g_str_equal(name, "type")) {
return true;
}
/* Do not print stub name for StringList elements */
if (g_str_equal(name, "str")) {
hmp_output_append_formatted(v, "%s", *obj);
} else {
hmp_output_append_formatted(v, "%s=%s", name, *obj);
}
return true;
}
static bool hmp_output_type_number(Visitor *v, const char *name,
double *obj, Error **errp)
{
hmp_output_append_formatted(v, "%s=%.17g", name, *obj);
return true;
}
/* TODO: remove this function? */
static bool hmp_output_type_any(Visitor *v, const char *name,
QObject **obj, Error **errp)
{
return true;
}
static bool hmp_output_type_null(Visitor *v, const char *name,
QNull **obj, Error **errp)
{
hmp_output_append_formatted(v, "%s=NULL", name);
return true;
}
static void hmp_output_complete(Visitor *v, void *opaque)
{
HMPOutputVisitor *ov = to_hov(v);
*ov->result = g_string_free(ov->buffer, false);
ov->buffer = NULL;
}
static void hmp_output_free(Visitor *v)
{
HMPOutputVisitor *ov = to_hov(v);
if (ov->buffer) {
g_string_free(ov->buffer, true);
}
g_free(v);
}
Visitor *hmp_output_visitor_new(char **result)
{
HMPOutputVisitor *v;
v = g_malloc0(sizeof(*v));
v->visitor.type = VISITOR_OUTPUT;
v->visitor.start_struct = hmp_output_start_struct;
v->visitor.end_struct = hmp_output_end_struct;
v->visitor.start_list = hmp_output_start_list;
v->visitor.next_list = hmp_output_next_list;
v->visitor.end_list = hmp_output_end_list;
v->visitor.type_int64 = hmp_output_type_int64;
v->visitor.type_uint64 = hmp_output_type_uint64;
v->visitor.type_bool = hmp_output_type_bool;
v->visitor.type_str = hmp_output_type_str;
v->visitor.type_number = hmp_output_type_number;
v->visitor.type_any = hmp_output_type_any;
v->visitor.type_null = hmp_output_type_null;
v->visitor.complete = hmp_output_complete;
v->visitor.free = hmp_output_free;
v->result = result;
v->buffer = g_string_new("");
v->is_continue = false;
return &v->visitor;
}
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