1 files changed, 59 insertions, 0 deletions
diff --git a/ext/libelf/elf_next.c b/ext/libelf/elf_next.c
new file mode 100644
index 000000000..1b1c4090b
--- /dev/null
+++ b/ext/libelf/elf_next.c
@@ -0,0 +1,59 @@
+/*-
+ * Copyright (c) 2006 Joseph Koshy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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 AUTHOR 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 AUTHOR 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 <ar.h>
+#include <assert.h>
+#include "libelf.h"
+
+#include "_libelf.h"
+
+Elf_Cmd
+elf_next(Elf *e)
+{
+        off_t next;
+        Elf *parent;
+
+        if (e == NULL)
+                return (ELF_C_NULL);
+
+         if ((parent = e->e_parent) == NULL) {
+                 LIBELF_SET_ERROR(ARGUMENT, 0);
+                 return (ELF_C_NULL);
+         }
+
+        assert (parent->e_kind == ELF_K_AR);
+        assert (parent->e_cmd == ELF_C_READ);
+        assert((uintptr_t) e->e_rawfile % 2 == 0);
+        assert(e->e_rawfile > parent->e_rawfile);
+
+        next = e->e_rawfile - parent->e_rawfile + e->e_rawsize;
+        next = (next + 1) & ~1;	/* round up to an even boundary */
+
+        parent->e_u.e_ar.e_next = (next >= (off_t) parent->e_rawsize) ? (off_t) 0 : next;
+
+        return (ELF_C_READ);
+}