util/token: rename TOKEN_STRLEN to TOKEN_SIZE

TOKEN_STRLEN is not actually the strlen() of the token. It's the
size taken by the token included the final zero byte.

Change the name to make this clearer, and remove unnecessary +1's.

include/util/token.h

@@ -3,7 +3,8 @@
 
 #include <stdbool.h>
 
-#define TOKEN_STRLEN 33
-bool generate_token(char out[static TOKEN_STRLEN]);
+#define TOKEN_SIZE 33
+
+bool generate_token(char out[static TOKEN_SIZE]);
 
 #endif

types/wlr_xdg_activation_v1.c

@@ -60,7 +60,7 @@ static void token_handle_destroy(struct wl_client *client,
 }
 
 static bool token_init( struct wlr_xdg_activation_token_v1 *token) {
-	char token_str[TOKEN_STRLEN + 1] = {0};
+	char token_str[TOKEN_SIZE] = {0};
 	if (!generate_token(token_str)) {
 		return false;
 	}
@@ -137,7 +137,7 @@ static void token_handle_commit(struct wl_client *client,
 error:;
 	// Here we send a generated token, but it's invalid and can't be used to
 	// request activation.
-	char token_str[TOKEN_STRLEN + 1] = {0};
+	char token_str[TOKEN_SIZE] = {0};
 	if (!generate_token(token_str)) {
 		wl_client_post_no_memory(client);
 		return;

util/token.c

@@ -11,7 +11,7 @@
 #include <sys/stat.h>
 #include <unistd.h>
 
-bool generate_token(char out[static TOKEN_STRLEN]) {
+bool generate_token(char out[static TOKEN_SIZE]) {
 	static FILE *urandom = NULL;
 	uint64_t data[2];
 
@@ -31,7 +31,7 @@ bool generate_token(char out[static TOKEN_STRLEN]) {
 		wlr_log_errno(WLR_ERROR, "Failed to read from random device");
 		return false;
 	}
-	if (snprintf(out, TOKEN_STRLEN, "%016" PRIx64 "%016" PRIx64, data[0], data[1]) != TOKEN_STRLEN - 1) {
+	if (snprintf(out, TOKEN_SIZE, "%016" PRIx64 "%016" PRIx64, data[0], data[1]) != TOKEN_SIZE - 1) {
 		wlr_log_errno(WLR_ERROR, "Failed to format hex string token");
 		return false;
 	}