diff --git a/colla.h b/colla.h
index 65cff07..376b4f6 100644
--- a/colla.h
+++ b/colla.h
@@ -324,6 +324,8 @@ for_each (chunk, arr) {
         (arr)->items[(arr)->count++] = (item); \
     } while (0)
 
+#define darr_pop(arr) if ((arr) && (arr)->count) --(arr)->count
+
 // STRING TYPES /////////////////////////////////
 
 #define STR_NONE SIZE_MAX
@@ -487,6 +489,7 @@ usize strv_rfind_view(strview_t ctx, strview_t view, usize from_right);
 bool char_is_space(char c);
 bool char_is_alpha(char c);
 bool char_is_num(char c);
+bool char_is_hex(char c);
 char char_lower(char c);
 char char_upper(char c);
 
@@ -603,23 +606,23 @@ bool ibstr_get_i16(ibstream_t *ib, i16 *out);
 bool ibstr_get_i32(ibstream_t *ib, i32 *out);
 bool ibstr_get_i64(ibstream_t *ib, i64 *out);
 
-// SIMPLE REGEX /////////////////////////////////
+// REGEX ////////////////////////////////////////
 
-// only supports *, every star matches until the following character
-// is found, e.g.
-// ab*e
-// abcde
-// matches (cd)
+// typedef struct rg_result_t rg_result_t;
+// struct rg_result_t {
+//     strview_t text;
+//     i64 offset;
+// };
+//
+// typedef struct rg_match_t rg_match_t;
+// struct rg_match_t {
+//     rg_result_t matches[COLLA_RG_MAX_MATCHES];
+//     int count;
+//     bool found_match;
+// };
 
-typedef struct rg_match_t rg_match_t;
-struct rg_match_t {
-    strview_t text[COLLA_RG_MAX_MATCHES];
-    int count;
-    bool matches;
-};
-
-rg_match_t rg_match(strview_t rg, strview_t text);
-bool rg_match_easy(strview_t rg, strview_t text);
+bool rg_matches(strview_t rg, strview_t text);
+bool glob_matches(strview_t glob, strview_t text);
 
 /////////////////////////////////////////////////
 
@@ -725,6 +728,7 @@ void os_abort(int code);
 iptr os_get_last_error(void);
 // NOT thread safe
 str_t os_get_error_string(iptr error);
+str_t os_get_last_error_string(void);
 
 // == HANDLE ====================================
 
@@ -824,6 +828,12 @@ oshandle_t os_stdin(void);
 // windows specific
 oshandle_t os_win_conout(void);
 oshandle_t os_win_conin(void);
+oshandle_t os_win_regopen(arena_t scratch, strview_t name);
+void os_win_regclose(oshandle_t key);
+str_t os_win_regread_str(arena_t *arena, oshandle_t key, strview_t value);
+i64 os_win_regread_int(arena_t scratch, oshandle_t key, strview_t value);
+str_t os_win_regkey_str(arena_t *arena, strview_t key, strview_t value);
+
 
 #define print(...)   fmt_print(__VA_ARGS__)
 #define println(...) os_log_print(__FILE__, __LINE__, LOG_BASIC, __VA_ARGS__)
@@ -921,6 +931,7 @@ typedef strv_list_t os_cmd_t;
 typedef struct os_cmd_options_t os_cmd_options_t;
 struct os_cmd_options_t {
     os_env_t *env;
+    bool quiet;
     // redirected if !NULL
     oshandle_t *error;
     oshandle_t *out;
@@ -1035,6 +1046,8 @@ job_t *jq_pop_job(job_queue_t *queue);
 
 // == ATOMICS ========================================
 
+#if !COLLA_NO_ATOMICS
+
 i64 atomic_set_i64(i64 *dest, i64 val);
 i64 atomic_add_i64(i64 *dest, i64 val);
 i64 atomic_and_i64(i64 *dest, i64 val);
@@ -1044,6 +1057,7 @@ i64 atomic_inc_i64(i64 *dest);
 i64 atomic_dec_i64(i64 *dest);
 i64 atomic_or_i64(i64 *dest, i64 val);
 i64 atomic_xor_i64(i64 *dest, i64 val);
+#endif
 
 // PARSERS //////////////////////////////////////
 
diff --git a/colla_lin.c b/colla_lin.c
index 2ac3227..6803c81 100644
--- a/colla_lin.c
+++ b/colla_lin.c
@@ -29,6 +29,8 @@
     #define ntohll(x) be64toh(x)
 #endif
 
+void os__log_init(void);
+
 strview_t os__fg_colours[LOG_COL__COUNT] = {
     [LOG_COL_BLACK]         = cstrv("\x1b[30m"),
     [LOG_COL_BLUE]          = cstrv("\x1b[34m"),
@@ -132,6 +134,8 @@ void os_init(void) {
     struct utsname name = {0};
     uname(&name);
     lin_data.info.machine_name = str(&lin_data.arena, name.nodename);
+
+    os__log_init();
 }
 
 void os_cleanup(void) {