Port to CMake, get rid of os_int.h.

[stg.git] / libs / smux / asn_SET_OF.c

diff --git a/libs/smux/asn_SET_OF.c b/libs/smux/asn_SET_OF.c
new file mode 100644 (file)
index 0000000..944f2cb
--- /dev/null
+++ b/libs/smux/asn_SET_OF.c
@@ -0,0 +1,88 @@
+/*-
+ * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#include <asn_internal.h>
+#include <asn_SET_OF.h>
+#include <errno.h>
+
+/*
+ * Add another element into the set.
+ */
+int
+asn_set_add(void *asn_set_of_x, void *ptr) {
+       asn_anonymous_set_ *as = _A_SET_FROM_VOID(asn_set_of_x);
+
+       if(as == 0 || ptr == 0) {
+               errno = EINVAL;         /* Invalid arguments */
+               return -1;
+       }
+
+       /*
+        * Make sure there's enough space to insert an element.
+        */
+       if(as->count == as->size) {
+               int _newsize = as->size ? (as->size << 1) : 4;
+               void *_new_arr;
+               _new_arr = REALLOC(as->array, _newsize * sizeof(as->array[0]));
+               if(_new_arr) {
+                       as->array = (void **)_new_arr;
+                       as->size = _newsize;
+               } else {
+                       /* ENOMEM */
+                       return -1;
+               }
+       }
+
+       as->array[as->count++] = ptr;
+
+       return 0;
+}
+
+void
+asn_set_del(void *asn_set_of_x, int number, int _do_free) {
+       asn_anonymous_set_ *as = _A_SET_FROM_VOID(asn_set_of_x);
+
+       if(as) {
+               void *ptr;
+               if(number < 0 || number >= as->count)
+                       return;
+
+               if(_do_free && as->free) {
+                       ptr = as->array[number];
+               } else {
+                       ptr = 0;
+               }
+
+               as->array[number] = as->array[--as->count];
+
+               /*
+                * Invoke the third-party function only when the state
+                * of the parent structure is consistent.
+                */
+               if(ptr) as->free(ptr);
+       }
+}
+
+/*
+ * Free the contents of the set, do not free the set itself.
+ */
+void
+asn_set_empty(void *asn_set_of_x) {
+       asn_anonymous_set_ *as = _A_SET_FROM_VOID(asn_set_of_x);
+
+       if(as) {
+               if(as->array) {
+                       if(as->free) {
+                               while(as->count--)
+                                       as->free(as->array[as->count]);
+                       }
+                       FREEMEM(as->array);
+                       as->array = 0;
+               }
+               as->count = 0;
+               as->size = 0;
+       }
+
+}
+