Add SPDX license identifiers to source files under the LGPL

[thirdparty/systemd.git] / src / basic / bitmap.c

diff --git a/src/basic/bitmap.c b/src/basic/bitmap.c
index 95f59e400a4e13bae9ea9bb86729324106269725..f1aa7c5e51a48884e3867ec1e2fa1df77ed7ec71 100644 (file)
--- a/src/basic/bitmap.c
+++ b/src/basic/bitmap.c
@@ -1,5 +1,4 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
 /***
   This file is part of systemd.
 
@@ -52,6 +51,21 @@ Bitmap *bitmap_new(void) {
         return new0(Bitmap, 1);
 }
 
+Bitmap *bitmap_copy(Bitmap *b) {
+        Bitmap *ret;
+
+        ret = bitmap_new();
+        if (!ret)
+                return NULL;
+
+        ret->bitmaps = newdup(uint64_t, b->bitmaps, b->n_bitmaps);
+        if (!ret->bitmaps)
+                return mfree(ret);
+
+        ret->n_bitmaps = ret->bitmaps_allocated = b->n_bitmaps;
+        return ret;
+}
+
 void bitmap_free(Bitmap *b) {
         if (!b)
                 return;
@@ -140,7 +154,8 @@ bool bitmap_isset(Bitmap *b, unsigned n) {
 bool bitmap_isclear(Bitmap *b) {
         unsigned i;
 
-        assert(b);
+        if (!b)
+                return true;
 
         for (i = 0; i < b->n_bitmaps; i++)
                 if (b->bitmaps[i] != 0)
@@ -150,7 +165,9 @@ bool bitmap_isclear(Bitmap *b) {
 }
 
 void bitmap_clear(Bitmap *b) {
-        assert(b);
+
+        if (!b)
+                return;
 
         b->bitmaps = mfree(b->bitmaps);
         b->n_bitmaps = 0;
@@ -197,7 +214,10 @@ bool bitmap_equal(Bitmap *a, Bitmap *b) {
         Bitmap *c;
         unsigned i;
 
-        if (!a ^ !b)
+        if (a == b)
+                return true;
+
+        if (!a != !b)
                 return false;
 
         if (!a)