X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/80fc20d1d69b14f36ad9bb64d8af38481cbf1ff5..10dbc9543edd5b5a7929dd8fa87ed33dd545375c:/util.c?ds=sidebyside

diff --git a/util.c b/util.c
index 08f14ff..fc8b72a 100644
--- a/util.c
+++ b/util.c
@@ -48,6 +48,27 @@ die(const char *fmt, ...)
 	exit(1);
 }
 
+int
+esnprintf(char *str, size_t size, const char *fmt, ...)
+{
+	va_list ap;
+	int ret;
+
+	va_start(ap, fmt);
+	ret = vsnprintf(str, size, fmt, ap);
+	va_end(ap);
+
+	if (ret < 0) {
+		warn("snprintf:");
+		return -1;
+	} else if ((size_t)ret >= size) {
+		warn("snprintf: Output truncated");
+		return -1;
+	}
+
+	return ret;
+}
+
 const char *
 bprintf(const char *fmt, ...)
 {
@@ -65,6 +86,30 @@ bprintf(const char *fmt, ...)
 	return buf;
 }
 
+const char *
+fmt_human(size_t num, int base)
+{
+	size_t i;
+	double scaled;
+	const char *siprefix[] = { "", "k", "M", "G", "T", "P", "E", "Z", "Y" };
+	const char *iecprefix[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei",
+	                            "Zi", "Yi" };
+	char *prefix[9];
+
+	if (base == 1000) {
+		memcpy(prefix, siprefix, sizeof(prefix));
+	} else if (base == 1024) {
+		memcpy(prefix, iecprefix, sizeof(prefix));
+	}
+
+	scaled = num;
+	for (i = 0; i < LEN(prefix) && scaled >= 1024; i++) {
+		scaled /= base;
+	}
+
+	return bprintf("%.1f%s", scaled, prefix[i]);
+}
+
 int
 pscanf(const char *path, const char *fmt, ...)
 {