From bbdcc403cae440c5f965f0f4c0de1f2d7fd256a7 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 28 Jul 2011 21:48:53 -0400 Subject: [PATCH] eliminate mk*temp dependency on snprintf this helps some tiny programs be even more tiny, and barly increases code size even if both are used. --- src/temp/mktemp.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/src/temp/mktemp.c b/src/temp/mktemp.c index 654a2794..b04f5dee 100644 --- a/src/temp/mktemp.c +++ b/src/temp/mktemp.c @@ -11,9 +11,9 @@ char *__mktemp(char *template) { struct timespec ts; - size_t l = strlen(template); + size_t i, l = strlen(template); int retries = 10000; - unsigned long r; + unsigned long r, t; if (l < 6 || strcmp(template+l-6, "XXXXXX")) { errno = EINVAL; @@ -23,7 +23,8 @@ char *__mktemp(char *template) clock_gettime(CLOCK_REALTIME, &ts); r = ts.tv_nsec + (uintptr_t)&ts / 16 + (uintptr_t)template; while (retries--) { - snprintf(template+l-6, 7, "%06lX", r & 0xffffff); + for (t=r, i=1; i<=6; i++, t>>=4) + template[l-i] = 'A'+(t&15); if (access(template, F_OK) < 0) return template; r = r * 1103515245 + 12345; } -- 2.25.1