From 1bcaa7aceefad99c7bda9cb7bf6fcc5b48b53a75 Mon Sep 17 00:00:00 2001 From: johannst Date: Sat, 17 Apr 2021 23:41:52 +0200 Subject: fmt: add support for %c --- lib/src/fmt.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'lib/src') diff --git a/lib/src/fmt.c b/lib/src/fmt.c index b0840de..56d95ed 100644 --- a/lib/src/fmt.c +++ b/lib/src/fmt.c @@ -11,7 +11,7 @@ static const char* num2dec(char* buf, unsigned long len, unsigned long long num) } while (num > 0 && pbuf != buf) { - char d = (char)(num % 10) + '0'; + char d = (char)(num % 10) + '0'; *(--pbuf) = d; num /= 10; } @@ -81,6 +81,10 @@ int vfmt(char* buf, unsigned long len, const char* fmt, va_list ap) { const char* ptr = num2hex(scratch, sizeof(scratch), val); puts(ptr); } break; + case 'c': { + char c = va_arg(ap, int); // By C standard, value passed to varg smaller than `sizeof(int)` will be converted to int. + put(c); + } break; case 's': { const char* ptr = va_arg(ap, const char*); puts(ptr); -- cgit v1.2.3