1 files changed, 64 insertions, 0 deletions
diff --git a/libboot/tags.c b/libboot/tags.c
new file mode 100644
index 0000000..3fbf23b
--- /dev/null
+++ b/libboot/tags.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the 
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <boot/tags.h>
+
+#define DBG(x...) do{}while(0)
+//#define DBG(x...) dprintf(x)
+
+void tags_parse(void *_tags, struct tag_handler *handlers, unsigned count)
+{
+    unsigned n;
+    unsigned *tags = _tags;
+    
+    DBG("tags_parse %p\n", tags);
+     
+        /* make sure there's a CORE marker first */
+    if(tags[0] != 2) return;
+    if(tags[1] != 0x54410001) return;
+
+    for(;;) {
+        unsigned size = tags[0];
+        unsigned type = tags[1];
+        
+        DBG("tags_parse %x %x\n", size, type);
+        
+        if(size < 2) break;
+        
+        for(n = 0; n < count; n++) {
+            struct tag_handler *h = handlers + n;
+            if((h->type == type) || (h->type == 0)) {
+                h->func(type, (void*) &tags[2], (size - 2) * 4, h->cookie);
+                break;
+            }
+        }
+
+        tags += size;
+    }
+}
+