rstudio/src/cpp/core/text/TextCursor.cpp at main · ssh352/rstudio · GitHub

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* TextCursor.cpp

* Unless you have received this program directly from Posit Software pursuant

* to the terms of a commercial license agreement with Posit Software, then

* this program is licensed to you under the terms of version 3 of the

* GNU Affero General Public License. This program is distributed WITHOUT

* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,

* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the

* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.

#include <core/text/TextCursor.hpp>

#include <algorithm>

#include <string>

#include <core/Macros.hpp>

namespace rstudio {

namespace core {

namespace text {

bool TextCursor::advance(std::size_t count)

{

std::size_t offset = offset_ + count;

if (UNLIKELY(offset >= size_))

return false;

offset_ = offset;

return true;

}

bool TextCursor::consume(char ch)

{

if (text_[offset_] != ch)

return false;

++offset_;

return true;

}

bool TextCursor::consume(const std::string& text)

{

for (std::size_t i = 0, n = text.size(); i < n; i++)

if (text_[offset_ + i] != text[i])

return false;

offset_ += text.size();

return true;

}

bool TextCursor::consumeUntil(char ch)

{

auto it = std::find(text_ + offset_, text_ + size_, ch);

if (it == text_ + size_)

return false;

offset_ = (it - text_);

return true;

}

bool TextCursor::consumeUntil(const std::string& text)

{

auto it = std::search(text_ + offset_, text_ + size_, text.begin(), text.end());

if (it == text_ + size_)

return false;

offset_ = (it - text_);

return true;

}

char TextCursor::peek(std::size_t count) const

{

auto offset = offset_ + count;

if (UNLIKELY(offset >= size_))

return 0;

return text_[offset];

}

} // end namespace text

} // end namespace core

} // end namespace rstudio

rstudio/src/cpp/core/text/TextCursor.cpp at main · ssh352/rstudio · GitHub

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