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gstvalue: Make sure GST_FOURCC_ARGS produces printable characters

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Some systems will crash if we use non-printable characters in print/debug
statements.

Make sure that GST_FOURCC_ARGS never does that

https://bugzilla.gnome.org/show_bug.cgi?id=745144
This commit is contained in:
Edward Hervey 2015-02-25 08:26:19 +01:00
parent 4245658d28
commit 075def0f97
2 changed files with 25 additions and 5 deletions
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12
gst/gstvalue.h
View file

@ -80,12 +80,14 @@ G_BEGIN_DECLS
* Can be used together with #GST_FOURCC_FORMAT to properly output a
* #guint32 fourcc value in a printf()-style text message.
*/
#define GST_FOURCC_ARGS(fourcc) \
((gchar) ((fourcc) &0xff)), \
((gchar) (((fourcc)>>8 )&0xff)), \
((gchar) (((fourcc)>>16)&0xff)), \
((gchar) (((fourcc)>>24)&0xff))
#define __GST_PRINT_CHAR(c) \
g_ascii_isprint(c) ? (c) : '.'
#define GST_FOURCC_ARGS(fourcc) \
__GST_PRINT_CHAR((fourcc) & 0xff), \
__GST_PRINT_CHAR(((fourcc) >> 8) & 0xff), \
__GST_PRINT_CHAR(((fourcc) >> 16) & 0xff), \
__GST_PRINT_CHAR(((fourcc) >> 24) & 0xff)
/**
* GST_VALUE_HOLDS_INT_RANGE:
* @x: the #GValue to check

18
tests/check/gst/gstinfo.c
View file

@ -332,6 +332,23 @@ GST_START_TEST (info_register_same_debug_category_twice)
GST_END_TEST;
#endif
GST_START_TEST (info_fourcc)
{
gchar *res;
const gchar *cmp;
cmp = "abcd";
res = g_strdup_printf ("%" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (0x64636261));
fail_unless_equals_string (res, cmp);
g_free (res);
cmp = ".bcd";
res = g_strdup_printf ("%" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (0x646362a9));
fail_unless_equals_string (res, cmp);
}
GST_END_TEST;
static Suite *
gst_info_suite (void)
{
@ -341,6 +358,7 @@ gst_info_suite (void)
tcase_set_timeout (tc_chain, 30);
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, info_fourcc);
#ifndef GST_DISABLE_GST_DEBUG
tcase_add_test (tc_chain, info_segment_format_printf_extension);
tcase_add_test (tc_chain, info_ptr_format_printf_extension);