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acpi: Simplify printing to dynamic string

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build_append_namestringv() and aml_string() first calculate the
resulting string's length with vsnprintf(NULL, ...), then allocate,
then print for real.  Simply use g_strdup_vprintf() or g_vasprintf()
instead.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Markus Armbruster 2015-05-27 19:55:55 +02:00 committed by Michael S. Tsirkin
parent ea96bc629c
commit c3bdc56c18
1 changed files with 5 additions and 22 deletions
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27
hw/acpi/aml-build.c
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@ -19,6 +19,7 @@
* with this program; if not, see <http://www.gnu.org/licenses/>. * with this program; if not, see <http://www.gnu.org/licenses/>.
*/ */
#include <glib/gprintf.h>
#include <stdio.h> #include <stdio.h>
#include <stdarg.h> #include <stdarg.h>
#include <assert.h> #include <assert.h>
@ -59,7 +60,6 @@ static void build_append_array(GArray *array, GArray *val)
static void static void
build_append_nameseg(GArray *array, const char *seg) build_append_nameseg(GArray *array, const char *seg)
{ {
/* It would be nicer to use g_string_vprintf but it's only there in 2.22 */
int len; int len;
len = strlen(seg); len = strlen(seg);
@ -73,22 +73,12 @@ build_append_nameseg(GArray *array, const char *seg)
static void GCC_FMT_ATTR(2, 0) static void GCC_FMT_ATTR(2, 0)
build_append_namestringv(GArray *array, const char *format, va_list ap) build_append_namestringv(GArray *array, const char *format, va_list ap)
{ {
/* It would be nicer to use g_string_vprintf but it's only there in 2.22 */
char *s; char *s;
int len;
va_list va_len;
char **segs; char **segs;
char **segs_iter; char **segs_iter;
int seg_count = 0; int seg_count = 0;
va_copy(va_len, ap); s = g_strdup_vprintf(format, ap);
len = vsnprintf(NULL, 0, format, va_len);
va_end(va_len);
len += 1;
s = g_new(typeof(*s), len);
len = vsnprintf(s, len, format, ap);
segs = g_strsplit(s, ".", 0); segs = g_strsplit(s, ".", 0);
g_free(s); g_free(s);
@ -753,22 +743,15 @@ Aml *aml_create_dword_field(Aml *srcbuf, Aml *index, const char *name)
Aml *aml_string(const char *name_format, ...) Aml *aml_string(const char *name_format, ...)
{ {
Aml *var = aml_opcode(0x0D /* StringPrefix */); Aml *var = aml_opcode(0x0D /* StringPrefix */);
va_list ap, va_len; va_list ap;
char *s; char *s;
int len; int len;
va_start(ap, name_format); va_start(ap, name_format);
va_copy(va_len, ap); len = g_vasprintf(&s, name_format, ap);
len = vsnprintf(NULL, 0, name_format, va_len);
va_end(va_len);
len += 1;
s = g_new0(typeof(*s), len);
len = vsnprintf(s, len, name_format, ap);
va_end(ap); va_end(ap);
g_array_append_vals(var->buf, s, len); g_array_append_vals(var->buf, s, len + 1);
build_append_byte(var->buf, 0x0); /* NullChar */
g_free(s); g_free(s);
return var; return var;