X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/blobdiff_plain/ce896b0b69481d8ec941e1601fddd2df5143b259..912f6431247d27e2144c5c078bd47396d95f5175:/utils/gprintf.c

diff --git a/utils/gprintf.c b/utils/gprintf.c
index b575e1f..8825bd1 100644
--- a/utils/gprintf.c
+++ b/utils/gprintf.c
@@ -416,9 +416,13 @@ int vgprintf(const struct gprintf_ops *ops, void *out,
 
     if (fs->fmt == fmt_unset) {
       switch (fs->ch) {
-	case 0: break;
-	case '%': ops->putch(out, '%'); break;
-	default: abort();
+	case 0:
+	  break;
+	case '%':
+	  if (ops->putch(out, '%')) return (-1);
+	  tot++; break;
+	default:
+	  abort();
       }
       continue;
     }
@@ -497,7 +501,7 @@ int vgprintf(const struct gprintf_ops *ops, void *out,
 #else
 #  define MSG "<no float support>"
 	if (ops->putm(out, MSG, sizeof(MSG) - 1)) return (-1);
-	continue;
+	tot += sizeof(MSG) - 1; continue;
 #  undef MSG
 #endif
       case 's':