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qapi: make string output visitor parse int list

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Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

MST: split up patch
This commit is contained in:
Hu Tao 2014-06-10 19:15:28 +08:00 committed by Michael S. Tsirkin
parent 659268ffbf
commit 69e255635d
2 changed files with 255 additions and 12 deletions
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229
qapi/string-output-visitor.c
View file

@ -16,32 +16,181 @@
#include "qapi/qmp/qerror.h"
#include "qemu/host-utils.h"
#include <math.h>
#include "qemu/range.h"
enum ListMode {
LM_NONE, /* not traversing a list of repeated options */
LM_STARTED, /* start_list() succeeded */
LM_IN_PROGRESS, /* next_list() has been called.
*
* Generating the next list link will consume the most
* recently parsed QemuOpt instance of the repeated
* option.
*
* Parsing a value into the list link will examine the
* next QemuOpt instance of the repeated option, and
* possibly enter LM_SIGNED_INTERVAL or
* LM_UNSIGNED_INTERVAL.
*/
LM_SIGNED_INTERVAL, /* next_list() has been called.
*
* Generating the next list link will consume the most
* recently stored element from the signed interval,
* parsed from the most recent QemuOpt instance of the
* repeated option. This may consume QemuOpt itself
* and return to LM_IN_PROGRESS.
*
* Parsing a value into the list link will store the
* next element of the signed interval.
*/
LM_UNSIGNED_INTERVAL,/* Same as above, only for an unsigned interval. */
LM_END
};
typedef enum ListMode ListMode;
struct StringOutputVisitor
{
Visitor visitor;
bool human;
char *string;
GString *string;
bool head;
ListMode list_mode;
union {
int64_t s;
uint64_t u;
} range_start, range_end;
GList *ranges;
};
static void string_output_set(StringOutputVisitor *sov, char *string)
{
g_free(sov->string);
sov->string = string;
if (sov->string) {
g_string_free(sov->string, true);
}
sov->string = g_string_new(string);
g_free(string);
}
static void string_output_append(StringOutputVisitor *sov, int64_t a)
{
Range *r = g_malloc0(sizeof(*r));
r->begin = a;
r->end = a + 1;
sov->ranges = g_list_insert_sorted_merged(sov->ranges, r, range_compare);
}
static void string_output_append_range(StringOutputVisitor *sov,
int64_t s, int64_t e)
{
Range *r = g_malloc0(sizeof(*r));
r->begin = s;
r->end = e + 1;
sov->ranges = g_list_insert_sorted_merged(sov->ranges, r, range_compare);
}
static void format_string(StringOutputVisitor *sov, Range *r, bool next,
bool human)
{
if (r->end - r->begin > 1) {
if (human) {
g_string_append_printf(sov->string, "%" PRIx64 "-%" PRIx64,
r->begin, r->end - 1);
} else {
g_string_append_printf(sov->string, "%" PRId64 "-%" PRId64,
r->begin, r->end - 1);
}
} else {
if (human) {
g_string_append_printf(sov->string, "%" PRIx64, r->begin);
} else {
g_string_append_printf(sov->string, "%" PRId64, r->begin);
}
}
if (next) {
g_string_append(sov->string, ",");
}
}
static void print_type_int(Visitor *v, int64_t *obj, const char *name,
Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
char *out;
GList *l;
switch (sov->list_mode) {
case LM_NONE:
string_output_append(sov, *obj);
break;
case LM_STARTED:
sov->range_start.s = *obj;
sov->range_end.s = *obj;
sov->list_mode = LM_IN_PROGRESS;
return;
case LM_IN_PROGRESS:
if (sov->range_end.s + 1 == *obj) {
sov->range_end.s++;
} else {
if (sov->range_start.s == sov->range_end.s) {
string_output_append(sov, sov->range_end.s);
} else {
assert(sov->range_start.s < sov->range_end.s);
string_output_append_range(sov, sov->range_start.s,
sov->range_end.s);
}
sov->range_start.s = *obj;
sov->range_end.s = *obj;
}
return;
case LM_END:
if (sov->range_end.s + 1 == *obj) {
sov->range_end.s++;
assert(sov->range_start.s < sov->range_end.s);
string_output_append_range(sov, sov->range_start.s,
sov->range_end.s);
} else {
if (sov->range_start.s == sov->range_end.s) {
string_output_append(sov, sov->range_end.s);
} else {
assert(sov->range_start.s < sov->range_end.s);
string_output_append_range(sov, sov->range_start.s,
sov->range_end.s);
}
string_output_append(sov, *obj);
}
break;
default:
abort();
}
l = sov->ranges;
while (l) {
Range *r = l->data;
format_string(sov, r, l->next != NULL, false);
l = l->next;
}
if (sov->human) {
out = g_strdup_printf("%lld (%#llx)", (long long) *obj, (long long) *obj);
} else {
out = g_strdup_printf("%lld", (long long) *obj);
l = sov->ranges;
g_string_append(sov->string, " (");
while (l) {
Range *r = l->data;
format_string(sov, r, l->next != NULL, false);
l = l->next;
}
g_string_append(sov->string, ")");
}
string_output_set(sov, out);
}
static void print_type_size(Visitor *v, uint64_t *obj, const char *name,
@ -103,9 +252,61 @@ static void print_type_number(Visitor *v, double *obj, const char *name,
string_output_set(sov, g_strdup_printf("%f", *obj));
}
static void
start_list(Visitor *v, const char *name, Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
/* we can't traverse a list in a list */
assert(sov->list_mode == LM_NONE);
sov->list_mode = LM_STARTED;
sov->head = true;
}
static GenericList *
next_list(Visitor *v, GenericList **list, Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
GenericList *ret = NULL;
if (*list) {
if (sov->head) {
ret = *list;
} else {
ret = (*list)->next;
}
if (sov->head) {
if (ret && ret->next == NULL) {
sov->list_mode = LM_NONE;
}
sov->head = false;
} else {
if (ret && ret->next == NULL) {
sov->list_mode = LM_END;
}
}
}
return ret;
}
static void
end_list(Visitor *v, Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
assert(sov->list_mode == LM_STARTED ||
sov->list_mode == LM_END ||
sov->list_mode == LM_NONE ||
sov->list_mode == LM_IN_PROGRESS);
sov->list_mode = LM_NONE;
sov->head = true;
}
char *string_output_get_string(StringOutputVisitor *sov)
{
char *string = sov->string;
char *string = g_string_free(sov->string, false);
sov->string = NULL;
return string;
}
@ -117,7 +318,11 @@ Visitor *string_output_get_visitor(StringOutputVisitor *sov)
void string_output_visitor_cleanup(StringOutputVisitor *sov)
{
g_free(sov->string);
if (sov->string) {
g_string_free(sov->string, true);
}
g_list_free_full(sov->ranges, g_free);
g_free(sov);
}
@ -127,6 +332,7 @@ StringOutputVisitor *string_output_visitor_new(bool human)
v = g_malloc0(sizeof(*v));
v->string = g_string_new(NULL);
v->human = human;
v->visitor.type_enum = output_type_enum;
v->visitor.type_int = print_type_int;
@ -134,6 +340,9 @@ StringOutputVisitor *string_output_visitor_new(bool human)
v->visitor.type_bool = print_type_bool;
v->visitor.type_str = print_type_str;
v->visitor.type_number = print_type_number;
v->visitor.start_list = start_list;
v->visitor.next_list = next_list;
v->visitor.end_list = end_list;
return v;
}

38
tests/test-string-output-visitor.c
View file

@ -44,7 +44,7 @@ static void visitor_output_teardown(TestOutputVisitorData *data,
static void test_visitor_out_int(TestOutputVisitorData *data,
const void *unused)
{
int64_t value = -42;
int64_t value = 42;
Error *err = NULL;
char *str;
@ -53,10 +53,42 @@ static void test_visitor_out_int(TestOutputVisitorData *data,
str = string_output_get_string(data->sov);
g_assert(str != NULL);
g_assert_cmpstr(str, ==, "-42");
g_assert_cmpstr(str, ==, "42");
g_free(str);
}
static void test_visitor_out_intList(TestOutputVisitorData *data,
const void *unused)
{
int64_t value[] = {0, 1, 9, 10, 16, 15, 14,
3, 4, 5, 6, 11, 12, 13, 21, 22, INT64_MAX - 1, INT64_MAX};
intList *list = NULL, **tmp = &list;
int i;
Error *errp = NULL;
char *str;
for (i = 0; i < sizeof(value) / sizeof(value[0]); i++) {
*tmp = g_malloc0(sizeof(**tmp));
(*tmp)->value = value[i];
tmp = &(*tmp)->next;
}
visit_type_intList(data->ov, &list, NULL, &errp);
g_assert(errp == NULL);
str = string_output_get_string(data->sov);
g_assert(str != NULL);
g_assert_cmpstr(str, ==,
"0-1,3-6,9-16,21-22,9223372036854775806-9223372036854775807");
g_free(str);
while (list) {
intList *tmp2;
tmp2 = list->next;
g_free(list);
list = tmp2;
}
}
static void test_visitor_out_bool(TestOutputVisitorData *data,
const void *unused)
{
@ -182,6 +214,8 @@ int main(int argc, char **argv)
&out_visitor_data, test_visitor_out_enum);
output_visitor_test_add("/string-visitor/output/enum-errors",
&out_visitor_data, test_visitor_out_enum_errors);
output_visitor_test_add("/string-visitor/output/intList",
&out_visitor_data, test_visitor_out_intList);
g_test_run();