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-rw-r--r--runtime/base/stringpiece.cc95
1 files changed, 95 insertions, 0 deletions
diff --git a/runtime/base/stringpiece.cc b/runtime/base/stringpiece.cc
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--- /dev/null
+++ b/runtime/base/stringpiece.cc
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2010 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 "stringpiece.h"
+
+#include <iostream>
+#include <utility>
+
+namespace art {
+
+void StringPiece::CopyToString(std::string* target) const {
+ target->assign(ptr_, length_);
+}
+
+int StringPiece::copy(char* buf, size_type n, size_type pos) const {
+ int ret = std::min(length_ - pos, n);
+ memcpy(buf, ptr_ + pos, ret);
+ return ret;
+}
+
+StringPiece::size_type StringPiece::find(const StringPiece& s, size_type pos) const {
+ if (length_ < 0 || pos > static_cast<size_type>(length_))
+ return npos;
+
+ const char* result = std::search(ptr_ + pos, ptr_ + length_,
+ s.ptr_, s.ptr_ + s.length_);
+ const size_type xpos = result - ptr_;
+ return xpos + s.length_ <= static_cast<size_type>(length_) ? xpos : npos;
+}
+
+int StringPiece::compare(const StringPiece& x) const {
+ int r = memcmp(ptr_, x.ptr_, std::min(length_, x.length_));
+ if (r == 0) {
+ if (length_ < x.length_) r = -1;
+ else if (length_ > x.length_) r = +1;
+ }
+ return r;
+}
+
+StringPiece::size_type StringPiece::find(char c, size_type pos) const {
+ if (length_ <= 0 || pos >= static_cast<size_type>(length_)) {
+ return npos;
+ }
+ const char* result = std::find(ptr_ + pos, ptr_ + length_, c);
+ return result != ptr_ + length_ ? result - ptr_ : npos;
+}
+
+StringPiece::size_type StringPiece::rfind(const StringPiece& s, size_type pos) const {
+ if (length_ < s.length_) return npos;
+ const size_t ulen = length_;
+ if (s.length_ == 0) return std::min(ulen, pos);
+
+ const char* last = ptr_ + std::min(ulen - s.length_, pos) + s.length_;
+ const char* result = std::find_end(ptr_, last, s.ptr_, s.ptr_ + s.length_);
+ return result != last ? result - ptr_ : npos;
+}
+
+StringPiece::size_type StringPiece::rfind(char c, size_type pos) const {
+ if (length_ <= 0) return npos;
+ for (int i = std::min(pos, static_cast<size_type>(length_ - 1));
+ i >= 0; --i) {
+ if (ptr_[i] == c) {
+ return i;
+ }
+ }
+ return npos;
+}
+
+StringPiece StringPiece::substr(size_type pos, size_type n) const {
+ if (pos > static_cast<size_type>(length_)) pos = length_;
+ if (n > length_ - pos) n = length_ - pos;
+ return StringPiece(ptr_ + pos, n);
+}
+
+const StringPiece::size_type StringPiece::npos = size_type(-1);
+
+std::ostream& operator<<(std::ostream& o, const StringPiece& piece) {
+ o.write(piece.data(), piece.size());
+ return o;
+}
+
+} // namespace art