auto import from //depot/cupcake/@135843
diff --git a/opengl/libagl/Tokenizer.cpp b/opengl/libagl/Tokenizer.cpp
new file mode 100644
index 0000000..9b3ea1a
--- /dev/null
+++ b/opengl/libagl/Tokenizer.cpp
@@ -0,0 +1,173 @@
+/* libs/opengles/Tokenizer.cpp
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#include <stdio.h>
+
+#include "Tokenizer.h"
+
+// ----------------------------------------------------------------------------
+
+namespace android {
+
+ANDROID_BASIC_TYPES_TRAITS(Tokenizer::run_t)
+
+Tokenizer::Tokenizer()
+{
+}
+
+Tokenizer::Tokenizer(const Tokenizer& other)
+ : mRanges(other.mRanges)
+{
+}
+
+Tokenizer::~Tokenizer()
+{
+}
+
+uint32_t Tokenizer::acquire()
+{
+ if (!mRanges.size() || mRanges[0].first) {
+ _insertTokenAt(0,0);
+ return 0;
+ }
+
+ // just extend the first run
+ const run_t& run = mRanges[0];
+ uint32_t token = run.first + run.length;
+ _insertTokenAt(token, 1);
+ return token;
+}
+
+bool Tokenizer::isAcquired(uint32_t token) const
+{
+ return (_indexOrderOf(token) >= 0);
+}
+
+status_t Tokenizer::reserve(uint32_t token)
+{
+ size_t o;
+ const ssize_t i = _indexOrderOf(token, &o);
+ if (i >= 0) {
+ return BAD_VALUE; // this token is already taken
+ }
+ ssize_t err = _insertTokenAt(token, o);
+ return (err<0) ? err : status_t(NO_ERROR);
+}
+
+status_t Tokenizer::release(uint32_t token)
+{
+ const ssize_t i = _indexOrderOf(token);
+ if (i >= 0) {
+ const run_t& run = mRanges[i];
+ if ((token >= run.first) && (token < run.first+run.length)) {
+ // token in this range, we need to split
+ run_t& run = mRanges.editItemAt(i);
+ if ((token == run.first) || (token == run.first+run.length-1)) {
+ if (token == run.first) {
+ run.first += 1;
+ }
+ run.length -= 1;
+ if (run.length == 0) {
+ // XXX: should we systematically remove a run that's empty?
+ mRanges.removeItemsAt(i);
+ }
+ } else {
+ // split the run
+ run_t new_run;
+ new_run.first = token+1;
+ new_run.length = run.first+run.length - new_run.first;
+ run.length = token - run.first;
+ mRanges.insertAt(new_run, i+1);
+ }
+ return NO_ERROR;
+ }
+ }
+ return NAME_NOT_FOUND;
+}
+
+ssize_t Tokenizer::_indexOrderOf(uint32_t token, size_t* order) const
+{
+ // binary search
+ ssize_t err = NAME_NOT_FOUND;
+ ssize_t l = 0;
+ ssize_t h = mRanges.size()-1;
+ ssize_t mid;
+ const run_t* a = mRanges.array();
+ while (l <= h) {
+ mid = l + (h - l)/2;
+ const run_t* const curr = a + mid;
+ int c = 0;
+ if (token < curr->first) c = 1;
+ else if (token >= curr->first+curr->length) c = -1;
+ if (c == 0) {
+ err = l = mid;
+ break;
+ } else if (c < 0) {
+ l = mid + 1;
+ } else {
+ h = mid - 1;
+ }
+ }
+ if (order) *order = l;
+ return err;
+}
+
+ssize_t Tokenizer::_insertTokenAt(uint32_t token, size_t index)
+{
+ const size_t c = mRanges.size();
+
+ if (index >= 1) {
+ // do we need to merge with the previous run?
+ run_t& p = mRanges.editItemAt(index-1);
+ if (p.first+p.length == token) {
+ p.length += 1;
+ if (index < c) {
+ const run_t& n = mRanges[index];
+ if (token+1 == n.first) {
+ p.length += n.length;
+ mRanges.removeItemsAt(index);
+ }
+ }
+ return index;
+ }
+ }
+
+ if (index < c) {
+ // do we need to merge with the next run?
+ run_t& n = mRanges.editItemAt(index);
+ if (token+1 == n.first) {
+ n.first -= 1;
+ n.length += 1;
+ return index;
+ }
+ }
+
+ return mRanges.insertAt(run_t(token,1), index);
+}
+
+void Tokenizer::dump() const
+{
+ const run_t* ranges = mRanges.array();
+ const size_t c = mRanges.size();
+ LOGD("Tokenizer (%p, size = %u)\n", this, c);
+ for (size_t i=0 ; i<c ; i++) {
+ LOGD("%u: (%u, %u)\n", i, ranges[i].first, ranges[i].length);
+ }
+}
+
+}; // namespace android
+