Allow raw dex files to be read from arrays of base64 encoded bytes.
This allows tests to be run without opening files on local disk.
Change-Id: I05296bfba584d76ae272d4905b5c45ae10687bc6
diff --git a/src/base64.cc b/src/base64.cc
new file mode 100644
index 0000000..e745a62
--- /dev/null
+++ b/src/base64.cc
@@ -0,0 +1,76 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+
+#include "src/globals.h"
+#include "src/scoped_ptr.h"
+
+#include <vector>
+
+namespace art {
+
+static const byte kMap[256] = {
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255,
+ 255, 254, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6,
+ 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
+ 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
+ 255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
+ 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+ 49, 50, 51, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+ 255, 255, 255, 255
+};
+
+byte* DecodeBase64(const char* src, size_t size, size_t* dst_size) {
+ std::vector<byte> tmp;
+ unsigned long t = 0, y = 0;
+ int g = 3;
+ for (size_t i = 0; i < size; ++i) {
+ byte c = kMap[src[i] & 0xFF];
+ if (c == 255) continue;
+ // the final = symbols are read and used to trim the remaining bytes
+ if (c == 254) {
+ c = 0;
+ // prevent g < 0 which would potentially allow an overflow later
+ if (--g < 0) {
+ return NULL;
+ }
+ } else if (g != 3) {
+ // we only allow = to be at the end
+ return NULL;
+ }
+ t = (t << 6) | c;
+ if (++y == 4) {
+ tmp.push_back((t >> 16) & 255);
+ if (g > 1) {
+ tmp.push_back((t >> 8) & 255);
+ }
+ if (g > 2) {
+ tmp.push_back(t & 255);
+ }
+ y = t = 0;
+ }
+ }
+ if (y != 0) {
+ return NULL;
+ }
+ scoped_ptr<byte> dst(new byte[tmp.size()]);
+ if (dst_size != NULL) {
+ *dst_size = tmp.size();
+ }
+ std::copy(tmp.begin(), tmp.end(), dst.get());
+ return dst.release();
+}
+
+};