Code cleanup

src/main.c

@@ -268,7 +268,7 @@ static char *sk_get_name (int fd)
 
 static struct addrinfo *ai_create (const char *host, const char *port, int listener)
 {
-    if (!port || !port[0]) {
+    if (str_empty(port)) {
         gt_log("port is not valid\n");
         return NULL;
     }
@@ -714,7 +714,7 @@ static int gt_setup_secretkey (struct crypto_ctx *ctx, char *keyfile)
 {
     const size_t size = sizeof(ctx->skey);
 
-    if (!keyfile) {
+    if (str_empty(keyfile)) {
         char buf[2*size+1];
 
         randombytes_buf(ctx->skey, size);
@@ -1055,7 +1055,7 @@ int main (int argc, char **argv)
 
         char *sockname = sk_get_name(sock.fd);
 
-        if (!sockname) {
+        if (str_empty(sockname)) {
             close(sock.fd);
             continue;
         }

src/option.c

@@ -5,7 +5,7 @@
 
 int option_str (void *data, int argc, char **argv)
 {
-    if (argc<2 || !argv[1]) {
+    if (argc<2 || str_empty(argv[1])) {
         gt_print("option `%s' need a string argument\n", argv[0]);
         return -1;
     }
@@ -17,7 +17,7 @@ int option_str (void *data, int argc, char **argv)
 
 int option_long (void *data, int argc, char **argv)
 {
-    if (argc<2 || !argv[1]) {
+    if (argc<2 || str_empty(argv[1])) {
         gt_print("option `%s' need an integer argument\n", argv[0]);
         return -1;
     }

src/str.h

@@ -44,12 +44,7 @@ static inline size_t str_len (const char *restrict str)
     if (!str)
         return 0;
 
-    size_t i = 0;
-
-    while (str[i])
-        i++;
-
-    return i;
+    return strlen(str);
 }
 
 static inline char *str_cat (const char *const strs[], size_t count)