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libnm-util: optimize nm_utils_hwaddr_ntoa_len()

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Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Thomas Haller 2014-05-29 20:57:08 +02:00
parent a7fa1aed1b
commit fedf7ca303
1 changed files with 17 additions and 9 deletions
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26
libnm-util/nm-utils.c
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@ -2154,18 +2154,26 @@ char *
nm_utils_hwaddr_ntoa_len (gconstpointer addr, gsize length)
{
const guint8 *in = addr;
GString *out;
char *out, *result;
const char *LOOKUP = "0123456789ABCDEF";
g_return_val_if_fail (addr && length, g_strdup (""));
out = g_string_new (NULL);
while (length--) {
if (out->len)
g_string_append_c (out, ':');
g_string_append_printf (out, "%02X", *in++);
if (!addr || !length) {
g_return_val_if_reached (g_strdup (""));
return g_strdup ("");
}
return g_string_free (out, FALSE);
result = out = g_malloc (length * 3);
for (;;) {
guint8 v = *in++;
*out++ = LOOKUP[v >> 4];
*out++ = LOOKUP[v & 0x0F];
if (--length == 0) {
*out = 0;
return result;
}
*out++ = ':';
}
}
/**