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qapi: Add human mode to StringOutputVisitor

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This will be used by "info qtree".  For numbers it prints both the
decimal and hex values.  For sizes it rounds to the nearest power
of 2^10.  For strings, it puts quotes around the string and separates
NULL and empty string.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Paolo Bonzini 2014-02-08 11:01:50 +01:00 • committed by Andreas Färber
parent 98a6528461
commit 0b7593e085
7 changed files with 60 additions and 10 deletions
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55
qapi/string-output-visitor.c
View file

@ -14,10 +14,12 @@
#include "qapi/string-output-visitor.h"
#include "qapi/visitor-impl.h"
#include "qapi/qmp/qerror.h"
#include "qemu/host-utils.h"
struct StringOutputVisitor
{
Visitor visitor;
bool human;
char *string;
};
@ -31,7 +33,45 @@ static void print_type_int(Visitor *v, int64_t *obj, const char *name,
Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
string_output_set(sov, g_strdup_printf("%lld", (long long) *obj));
char *out;
if (sov->human) {
out = g_strdup_printf("%lld (%#llx)", (long long) *obj, (long long) *obj);
} else {
out = g_strdup_printf("%lld", (long long) *obj);
}
string_output_set(sov, out);
}
static void print_type_size(Visitor *v, uint64_t *obj, const char *name,
Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
static const char suffixes[] = { 'B', 'K', 'M', 'G', 'T' };
uint64_t div, val;
char *out;
int i;
if (!sov->human) {
out = g_strdup_printf("%llu", (long long) *obj);
string_output_set(sov, out);
return;
}
val = *obj;
/* Compute floor(log2(val)). */
i = 64 - clz64(val);
/* Find the power of 1024 that we'll display as the units. */
i /= 10;
if (i >= ARRAY_SIZE(suffixes)) {
i = ARRAY_SIZE(suffixes) - 1;
}
div = 1ULL << (i * 10);
out = g_strdup_printf("%0.03f%c", (double)val/div, suffixes[i]);
string_output_set(sov, out);
}
static void print_type_bool(Visitor *v, bool *obj, const char *name,
@ -45,7 +85,14 @@ static void print_type_str(Visitor *v, char **obj, const char *name,
Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
string_output_set(sov, g_strdup(*obj ? *obj : ""));
char *out;
if (sov->human) {
out = *obj ? g_strdup_printf("\"%s\"", *obj) : g_strdup("<null>");
} else {
out = g_strdup(*obj ? *obj : "");
}
string_output_set(sov, out);
}
static void print_type_number(Visitor *v, double *obj, const char *name,
@ -73,14 +120,16 @@ void string_output_visitor_cleanup(StringOutputVisitor *sov)
g_free(sov);
}
StringOutputVisitor *string_output_visitor_new(void)
StringOutputVisitor *string_output_visitor_new(bool human)
{
StringOutputVisitor *v;
v = g_malloc0(sizeof(*v));
v->human = human;
v->visitor.type_enum = output_type_enum;
v->visitor.type_int = print_type_int;
v->visitor.type_size = print_type_size;
v->visitor.type_bool = print_type_bool;
v->visitor.type_str = print_type_str;
v->visitor.type_number = print_type_number;