io: directory: implement temporary directories and delete-on-close

io/sys/darwin/file.c

@@ -1,3 +1,4 @@
+#include "misc.h"
 #include "posix.h"
 
 #include <blue/core/random.h>
@@ -118,24 +119,6 @@ b_result b_file_open(
 	return B_RESULT_SUCCESS;
 }
 
-static void generate_tmp_filename(char *out, size_t len)
-{
-	static const char *alphabet
-		= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
-		  "01234567"
-		  "89+=-_.";
-	static const size_t alphabet_len = 67;
-
-	b_random_ctx *ctx = b_random_global_ctx();
-
-	for (size_t i = 0; i < len; i++) {
-		int v = b_random_next_int64(ctx) % alphabet_len;
-		out[i] = alphabet[v];
-	}
-
-	out[len - 1] = 0;
-}
-
 b_result b_file_open_temp(enum b_file_mode mode, struct b_file **out)
 {
 	mode |= B_FILE_DELETE_ON_CLOSE;
@@ -144,7 +127,7 @@ b_result b_file_open_temp(enum b_file_mode mode, struct b_file **out)
 	char path[128];
 
 	while (1) {
-		generate_tmp_filename(name, sizeof name);
+		z__b_io_generate_tmp_filename(name, sizeof name);
 		snprintf(path, sizeof path, "/tmp/%s", name);
 		struct b_path *rpath = b_path_create_from_cstr(path);
 
@@ -423,7 +406,7 @@ enum b_status b_file_swap_shadow(struct b_file *main_file, struct b_file *shadow
 
 	while (1) {
 		char tmp_name[16];
-		generate_tmp_filename(tmp_name, sizeof tmp_name);
+		z__b_io_generate_tmp_filename(tmp_name, sizeof tmp_name);
 		struct b_path *tmp_name_p = b_path_create_from_cstr(tmp_name);
 
 		const struct b_path *parts[] = {