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+/*
+ * Copyright (C) 2015 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 "BigBuffer.h"
+#include "Maybe.h"
+#include "StringPiece.h"
+#include "Util.h"
+
+#include <algorithm>
+#include <ostream>
+#include <string>
+#include <utils/Unicode.h>
+#include <vector>
+
+namespace aapt {
+namespace util {
+
+static std::vector<std::string> splitAndTransform(const StringPiece& str, char sep,
+ const std::function<char(char)>& f) {
+ std::vector<std::string> parts;
+ const StringPiece::const_iterator end = std::end(str);
+ StringPiece::const_iterator start = std::begin(str);
+ StringPiece::const_iterator current;
+ do {
+ current = std::find(start, end, sep);
+ parts.emplace_back(str.substr(start, current).toString());
+ if (f) {
+ std::string& part = parts.back();
+ std::transform(part.begin(), part.end(), part.begin(), f);
+ }
+ start = current + 1;
+ } while (current != end);
+ return parts;
+}
+
+std::vector<std::string> split(const StringPiece& str, char sep) {
+ return splitAndTransform(str, sep, nullptr);
+}
+
+std::vector<std::string> splitAndLowercase(const StringPiece& str, char sep) {
+ return splitAndTransform(str, sep, ::tolower);
+}
+
+bool stringEndsWith(const StringPiece& str, const StringPiece& suffix) {
+ if (str.size() < suffix.size()) {
+ return false;
+ }
+ return str.substr(str.size() - suffix.size(), suffix.size()) == suffix;
+}
+
+StringPiece16 trimWhitespace(const StringPiece16& str) {
+ if (str.size() == 0 || str.data() == nullptr) {
+ return str;
+ }
+
+ const char16_t* start = str.data();
+ const char16_t* end = str.data() + str.length();
+
+ while (start != end && util::isspace16(*start)) {
+ start++;
+ }
+
+ while (end != start && util::isspace16(*(end - 1))) {
+ end--;
+ }
+
+ return StringPiece16(start, end - start);
+}
+
+StringPiece16::const_iterator findNonAlphaNumericAndNotInSet(const StringPiece16& str,
+ const StringPiece16& allowedChars) {
+ const auto endIter = str.end();
+ for (auto iter = str.begin(); iter != endIter; ++iter) {
+ char16_t c = *iter;
+ if ((c >= u'a' && c <= u'z') ||
+ (c >= u'A' && c <= u'Z') ||
+ (c >= u'0' && c <= u'9')) {
+ continue;
+ }
+
+ bool match = false;
+ for (char16_t i : allowedChars) {
+ if (c == i) {
+ match = true;
+ break;
+ }
+ }
+
+ if (!match) {
+ return iter;
+ }
+ }
+ return endIter;
+}
+
+static Maybe<char16_t> parseUnicodeCodepoint(const char16_t** start, const char16_t* end) {
+ char16_t code = 0;
+ for (size_t i = 0; i < 4 && *start != end; i++, (*start)++) {
+ char16_t c = **start;
+ int a;
+ if (c >= '0' && c <= '9') {
+ a = c - '0';
+ } else if (c >= 'a' && c <= 'f') {
+ a = c - 'a' + 10;
+ } else if (c >= 'A' && c <= 'F') {
+ a = c - 'A' + 10;
+ } else {
+ return make_nothing<char16_t>();
+ }
+ code = (code << 4) | a;
+ }
+ return make_value(code);
+}
+
+StringBuilder& StringBuilder::append(const StringPiece16& str) {
+ if (!mError.empty()) {
+ return *this;
+ }
+
+ const char16_t* const end = str.end();
+ const char16_t* start = str.begin();
+ const char16_t* current = start;
+ while (current != end) {
+ if (*current == u'"') {
+ if (!mQuote && mTrailingSpace) {
+ // We found an opening quote, and we have
+ // trailing space, so we should append that
+ // space now.
+ if (mTrailingSpace) {
+ // We had trailing whitespace, so
+ // replace with a single space.
+ if (!mStr.empty()) {
+ mStr += u' ';
+ }
+ mTrailingSpace = false;
+ }
+ }
+ mQuote = !mQuote;
+ mStr.append(start, current - start);
+ start = current + 1;
+ } else if (*current == u'\'' && !mQuote) {
+ // This should be escaped.
+ mError = "unescaped apostrophe";
+ return *this;
+ } else if (*current == u'\\') {
+ // This is an escape sequence, convert to the real value.
+ if (!mQuote && mTrailingSpace) {
+ // We had trailing whitespace, so
+ // replace with a single space.
+ if (!mStr.empty()) {
+ mStr += u' ';
+ }
+ mTrailingSpace = false;
+ }
+ mStr.append(start, current - start);
+ start = current + 1;
+
+ current++;
+ if (current != end) {
+ switch (*current) {
+ case u't':
+ mStr += u'\t';
+ break;
+ case u'n':
+ mStr += u'\n';
+ break;
+ case u'#':
+ mStr += u'#';
+ break;
+ case u'@':
+ mStr += u'@';
+ break;
+ case u'?':
+ mStr += u'?';
+ break;
+ case u'"':
+ mStr += u'"';
+ break;
+ case u'\'':
+ mStr += u'\'';
+ break;
+ case u'\\':
+ mStr += u'\\';
+ break;
+ case u'u': {
+ current++;
+ Maybe<char16_t> c = parseUnicodeCodepoint(&current, end);
+ if (!c) {
+ mError = "invalid unicode escape sequence";
+ return *this;
+ }
+ mStr += c.value();
+ current -= 1;
+ break;
+ }
+
+ default:
+ // Ignore.
+ break;
+ }
+ start = current + 1;
+ }
+ } else if (!mQuote) {
+ // This is not quoted text, so look for whitespace.
+ if (isspace16(*current)) {
+ // We found whitespace, see if we have seen some
+ // before.
+ if (!mTrailingSpace) {
+ // We didn't see a previous adjacent space,
+ // so mark that we did.
+ mTrailingSpace = true;
+ mStr.append(start, current - start);
+ }
+
+ // Keep skipping whitespace.
+ start = current + 1;
+ } else if (mTrailingSpace) {
+ // We saw trailing space before, so replace all
+ // that trailing space with one space.
+ if (!mStr.empty()) {
+ mStr += u' ';
+ }
+ mTrailingSpace = false;
+ }
+ }
+ current++;
+ }
+ mStr.append(start, end - start);
+ return *this;
+}
+
+std::u16string utf8ToUtf16(const StringPiece& utf8) {
+ ssize_t utf16Length = utf8_to_utf16_length(reinterpret_cast<const uint8_t*>(utf8.data()),
+ utf8.length());
+ if (utf16Length <= 0) {
+ return {};
+ }
+
+ std::u16string utf16;
+ utf16.resize(utf16Length);
+ utf8_to_utf16(reinterpret_cast<const uint8_t*>(utf8.data()), utf8.length(), &*utf16.begin());
+ return utf16;
+}
+
+std::string utf16ToUtf8(const StringPiece16& utf16) {
+ ssize_t utf8Length = utf16_to_utf8_length(utf16.data(), utf16.length());
+ if (utf8Length <= 0) {
+ return {};
+ }
+
+ std::string utf8;
+ utf8.resize(utf8Length);
+ utf16_to_utf8(utf16.data(), utf16.length(), &*utf8.begin());
+ return utf8;
+}
+
+bool writeAll(std::ostream& out, const BigBuffer& buffer) {
+ for (const auto& b : buffer) {
+ if (!out.write(reinterpret_cast<const char*>(b.buffer.get()), b.size)) {
+ return false;
+ }
+ }
+ return true;
+}
+
+std::unique_ptr<uint8_t[]> copy(const BigBuffer& buffer) {
+ std::unique_ptr<uint8_t[]> data = std::unique_ptr<uint8_t[]>(new uint8_t[buffer.size()]);
+ uint8_t* p = data.get();
+ for (const auto& block : buffer) {
+ memcpy(p, block.buffer.get(), block.size);
+ p += block.size;
+ }
+ return data;
+}
+
+} // namespace util
+} // namespace aapt
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