Skip %c char if input zero

5 years ago · 4d6a6ae7df
parent 41eac5bce7
commit 4d6a6ae7df
1 changed files with 2 additions and 1 deletions
--- a/chprintf.c
+++ b/chprintf.c
@ -350,7 +350,8 @@ int chvprintf(BaseSequentialStream *chp, const char *fmt, va_list ap) {
    switch (c) {
    case 'c':
      state&=~PAD_ZERO;
-      *p++ = va_arg(ap, int);
+      c = va_arg(ap, int);
+      if (c) *p++ = c;
      break;
    case 's':
      state&=~PAD_ZERO;