env: move function to sysif.c

* lib.c (env_list): Static variable removed; now appears in
sysif.c
(env): Function removed; now in sysif.c.
(obj_init): Don't gc-protect env_list here any more.

* lib.h (env): Declaration removed.

* match.c: Must include "sysif.h" now for env.

* sysif.c (env_list): Static variable moved here.
(env): Function moved here.
(sysif_init): env_list gc-protected here.

* sysif.h (env): Declared.

5 files changed, 39 insertions, 38 deletions

diff --git a/lib.c b/lib.c
index 6e46039f..2d38cd78 100644
--- a/lib.c
+++ b/lib.c
@@ -130,7 +130,6 @@ val list_f, less_f, greater_f;
 
 val prog_string;
 
-static val env_list;
 static val recycled_conses;
 
 const seq_kind_t seq_kind_tab[MAXTYPE+1] = {
@@ -11867,39 +11866,6 @@ val in_range_star(val range, val num)
   }
 }
 
-val env(void)
-{
-  if (env_list) {
-    return env_list;
-  } else {
-    list_collect_decl (out, ptail);
-#if HAVE_ENVIRON
-    extern char **environ;
-    char **iter = environ;
-
-    for (; *iter != 0; iter++)
-      ptail = list_collect(ptail, string_utf8(*iter));
-
-    return env_list = out;
-#elif HAVE_GETENVIRONMENTSTRINGS
-    wchar_t *env = GetEnvironmentStringsW();
-    wchar_t *iter = env;
-
-    if (iter == 0)
-      oom();
-
-    for (; *iter; iter += wcslen(iter) + 1)
-      ptail = list_collect(ptail, string(iter));
-
-    FreeEnvironmentStringsW(env);
-
-    return env_list = out;
-#else
-    uw_throwf(error_s, lit("environment strings not available"), nao);
-#endif
-  }
-}
-
 static void obj_init(void)
 {
   val self = lit("internal init");
@@ -11915,7 +11881,7 @@ static void obj_init(void)
           &null_list, &equal_f, &eq_f, &eql_f,
           &car_f, &cdr_f, &null_f, &list_f,
           &identity_f, &identity_star_f, &less_f, &greater_f,
-          &prog_string, &env_list,
+          &prog_string,
           convert(val *, 0));
 
   nil_string = lit("nil");
diff --git a/lib.h b/lib.h
index 1af21e7e..535c2c45 100644
--- a/lib.h
+++ b/lib.h
@@ -1195,7 +1195,6 @@ val set_from(val range, val from);
 val set_to(val range, val to);
 val in_range(val range, val num);
 val in_range_star(val range, val num);
-val env(void);
 void out_str_char(wchar_t ch, val out, int *semi_flag, int regex);
 val obj_print_impl(val obj, val out, val pretty, struct strm_ctx *);
 val obj_print(val obj, val stream, val pretty);
diff --git a/match.c b/match.c
index 0e066fe9..1d7bc986 100644
--- a/match.c
+++ b/match.c
@@ -47,6 +47,7 @@
 #include "hash.h"
 #include "eval.h"
 #include "cadr.h"
+#include "sysif.h"
 #include "match.h"
 
 int opt_print_bindings = 0;
diff --git a/sysif.c b/sysif.c
index f636d4f1..e51692db 100644
--- a/sysif.c
+++ b/sysif.c
@@ -148,6 +148,8 @@ static val at_exit_list;
 
 static val dirent_st;
 
+static val env_list;
+
 static val errno_wrap(val newval)
 {
   val self = lit("errno");
@@ -287,6 +289,39 @@ static val getppid_wrap(void)
 
 #endif
 
+val env(void)
+{
+  if (env_list) {
+    return env_list;
+  } else {
+    list_collect_decl (out, ptail);
+#if HAVE_ENVIRON
+    extern char **environ;
+    char **iter = environ;
+
+    for (; *iter != 0; iter++)
+      ptail = list_collect(ptail, string_utf8(*iter));
+
+    return env_list = out;
+#elif HAVE_GETENVIRONMENTSTRINGS
+    wchar_t *env = GetEnvironmentStringsW();
+    wchar_t *iter = env;
+
+    if (iter == 0)
+      oom();
+
+    for (; *iter; iter += wcslen(iter) + 1)
+      ptail = list_collect(ptail, string(iter));
+
+    FreeEnvironmentStringsW(env);
+
+    return env_list = out;
+#else
+    uw_throwf(error_s, lit("environment strings not available"), nao);
+#endif
+  }
+}
+
 static val env_hash(void)
 {
   val env_strings = env();
@@ -2354,8 +2389,7 @@ static val dirstat(val dirent, val dir_path, val stat_opt)
 
 void sysif_init(void)
 {
-  prot1(&at_exit_list);
-  prot1(&dirent_st);
+  protect(&at_exit_list, dirent_st, &env_list, convert(val *, 0));
 
   atexit(at_exit_handler);
 
diff --git a/sysif.h b/sysif.h
index d599c737..3f445f0a 100644
--- a/sysif.h
+++ b/sysif.h
@@ -36,6 +36,7 @@ extern val atime_nsec_s, mtime_nsec_s, ctime_nsec_s;
 extern val path_s;
 
 val errno_to_file_error(int err);
+val env(void);
 val getenv_wrap(val name);
 val errno_to_str(int err);
 val at_exit_call(val func);