num2str(): Remove the fmt[] array

[fio.git] / lib / num2str.c

diff --git a/lib/num2str.c b/lib/num2str.c
index ce17727598d16e51ddb25576ef5718d3d223abe0..923e21d9ce9abc321aa1fb07c67ee9506b174383 100644 (file)
--- a/lib/num2str.c
+++ b/lib/num2str.c
@@ -34,7 +34,7 @@ char *num2str(uint64_t num, int maxlen, int base, int pow2, enum n2s_unit units)
        const unsigned int thousand = pow2 ? 1024 : 1000;
        unsigned int modulo;
        int post_index, carry = 0;
-       char tmp[32], fmt[32];
+       char tmp[32];
        char *buf;
 
        compiletime_assert(sizeof(sistr) == sizeof(iecstr), "unit prefix arrays must be identical sizes");
@@ -109,8 +109,8 @@ done:
         */
        assert(maxlen - strlen(tmp) - 1 > 0);
        assert(modulo < thousand);
-       sprintf(fmt, "%%.%df", (int)(maxlen - strlen(tmp) - 1));
-       sprintf(tmp, fmt, (double)modulo / (double)thousand);
+       sprintf(tmp, "%.*f", (int)(maxlen - strlen(tmp) - 1),
+               (double)modulo / (double)thousand);
 
        if (asprintf(&buf, "%llu.%s%s%s", (unsigned long long) num, &tmp[2],
                     unitprefix[post_index], unitstr[units]) < 0)