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