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++ // Copyright 2009-2021 Intel Corporation
++ // SPDX-License-Identifier: Apache-2.0
++
++ #include "stringstream.h"
++
++ namespace embree
++ {
++ static const std::string stringChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 _.,+-=:/*\\";
++
++ /* creates map for fast categorization of characters */
++ static void createCharMap(bool map[256], const std::string& chrs) {
++ for (size_t i=0; i<256; i++) map[i] = false;
++ for (size_t i=0; i<chrs.size(); i++) map[uint8_t(chrs[i])] = true;
++ }
++
++ /* simple tokenizer */
++ StringStream::StringStream(const Ref<Stream<int> >& cin, const std::string& seps, const std::string& endl, bool multiLine)
++ : cin(cin), endl(endl), multiLine(multiLine)
++ {
++ createCharMap(isSepMap,seps);
++ createCharMap(isValidCharMap,stringChars);
++ }
++
++ std::string StringStream::next()
++ {
++ /* skip separators */
++ while (cin->peek() != EOF) {
++ if (endl != "" && cin->peek() == '\n') { cin->drop(); return endl; }
++ if (multiLine && cin->peek() == '\\') {
++ cin->drop();
++ if (cin->peek() == '\n') { cin->drop(); continue; }
++ cin->unget();
++ }
++ if (!isSeparator(cin->peek())) break;
++ cin->drop();
++ }
++
++ /* parse everything until the next separator */
++ std::vector<char> str; str.reserve(64);
++ while (cin->peek() != EOF && !isSeparator(cin->peek())) {
++ int c = cin->get();
++ if (!isValidChar(c)) throw std::runtime_error("invalid character "+std::string(1,c)+" in input");
++ str.push_back((char)c);
++ }
++ str.push_back(0);
++ return std::string(str.data());
++ }
++ }