From d99afb18e808820e9a83dce863dbb0ca2deabff5 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Fri, 13 Jun 2025 19:06:00 -0400 Subject: usr: libc: Support padding of hex digits Signed-off-by: Ian Moffett --- lib/libc/src/stdio/vsnprintf.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'lib') diff --git a/lib/libc/src/stdio/vsnprintf.c b/lib/libc/src/stdio/vsnprintf.c index 0e29600..24b2df6 100644 --- a/lib/libc/src/stdio/vsnprintf.c +++ b/lib/libc/src/stdio/vsnprintf.c @@ -123,6 +123,12 @@ vsnprintf(char *s, size_t size, const char *fmt, va_list ap) num = __va_arg(ap, uint64_t); itoa(num, num_buf, 16); tmp_len = strlen(num_buf); + if (pad_width > 0) { + num_len = strlen(num_buf); + for (size_t i = num_len; i < pad_width; ++i) + printc(s, size, &off, '0'); + pad_width = 0; + } printstr(s, size, &off, num_buf + 2); break; case 's': -- cgit v1.2.3