[hackers] [slstatus] Refactor snprintf-usage in util.c || Laslo Hunhold

[git]

commit 13d77cd268bade5e9ee9c07d9b94ca7c733cbe3d
Author:     Laslo Hunhold <d...@frign.de>
AuthorDate: Wed May 23 13:51:50 2018 +0200
Commit:     Aaron Marcher <m...@drkhsh.at>
CommitDate: Wed May 23 19:56:04 2018 +0200

    Refactor snprintf-usage in util.c

diff --git a/util.c b/util.c
index b412211..5ce2396 100644
--- a/util.c
+++ b/util.c
@@ -48,27 +48,37 @@ die(const char *fmt, ...)
        exit(1);
 }
 
-int
-esnprintf(char *str, size_t size, const char *fmt, ...)
+static int
+evsnprintf(char *str, size_t size, const char *fmt, va_list ap)
 {
-       va_list ap;
        int ret;
 
-       va_start(ap, fmt);
        ret = vsnprintf(str, size, fmt, ap);
-       va_end(ap);
 
        if (ret < 0) {
-               warn("snprintf:");
+               warn("vsnprintf:");
                return -1;
        } else if ((size_t)ret >= size) {
-               warn("snprintf: Output truncated");
+               warn("vsnprintf: Output truncated");
                return -1;
        }
 
        return ret;
 }
 
+int
+esnprintf(char *str, size_t size, const char *fmt, ...)
+{
+       va_list ap;
+       int ret;
+
+       va_start(ap, fmt);
+       ret = evsnprintf(str, size, fmt, ap);
+       va_end(ap);
+
+       return ret;
+}
+
 const char *
 bprintf(const char *fmt, ...)
 {
@@ -76,14 +86,10 @@ bprintf(const char *fmt, ...)
        int ret;
 
        va_start(ap, fmt);
-       if ((ret = vsnprintf(buf, sizeof(buf), fmt, ap)) < 0) {
-               warn("vsnprintf:");
-       } else if ((size_t)ret >= sizeof(buf)) {
-               warn("vsnprintf: Output truncated");
-       }
+       ret = evsnprintf(buf, sizeof(buf), fmt, ap);
        va_end(ap);
 
-       return buf;
+       return (ret < 0) ? NULL : buf;
 }
 
 const char *