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Improve debug output with really deep nesting

This commit is contained in:
Behdad Esfahbod 2016-12-21 19:27:30 -06:00
parent eab418c5e6
commit df98ce5fc8
1 changed files with 7 additions and 4 deletions
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11
src/hb-private.hh
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@ -689,17 +689,20 @@ _hb_debug_msg_va (const char *what,
fprintf (stderr, " %*s ", (unsigned int) (2 * sizeof (void *)), "");
if (indented) {
/* One may want to add ASCII version of these. See:
* https://bugs.freedesktop.org/show_bug.cgi?id=50970 */
#define VBAR "\342\224\202" /* U+2502 BOX DRAWINGS LIGHT VERTICAL */
#define VRBAR "\342\224\234" /* U+251C BOX DRAWINGS LIGHT VERTICAL AND RIGHT */
#define DLBAR "\342\225\256" /* U+256E BOX DRAWINGS LIGHT ARC DOWN AND LEFT */
#define ULBAR "\342\225\257" /* U+256F BOX DRAWINGS LIGHT ARC UP AND LEFT */
#define LBAR "\342\225\264" /* U+2574 BOX DRAWINGS LIGHT LEFT */
static const char bars[] = VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR;
static const char bars[] =
VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR
VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR VBAR;
fprintf (stderr, "%2u %s" VRBAR "%s",
level,
bars + sizeof (bars) - 1 - MIN ((unsigned int) sizeof (bars), (unsigned int) (sizeof (VBAR) - 1) * level),
bars + sizeof (bars) - 1 - MIN ((unsigned int) sizeof (bars) - 1, (unsigned int) (sizeof (VBAR) - 1) * level),
level_dir ? (level_dir > 0 ? DLBAR : ULBAR) : LBAR);
} else
fprintf (stderr, " " VRBAR LBAR);