src/gromacs/utility/messagestringcollector.cpp

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  35 /*! \internal \file
  36  * \brief
  37  * Implements gmx::MessageStringCollector.
  38  *
  39  * \author Teemu Murtola <teemu.murtola@gmail.com>
  40  * \ingroup module_utility
  41  */
  42 #include "gmxpre.h"
  43
  44 #include "messagestringcollector.h"
  45
  46 #include <vector>
  47
  48 #include "gromacs/utility/gmxassert.h"
  49
  50 namespace gmx
  51 {
  52
  53 class MessageStringCollector::Impl
  54 {
  55     public:
  56         Impl() : prevContext_(0) {}
  57
  58         std::vector<std::string> contexts_;
  59         std::string              text_;
  60         size_t                   prevContext_;
  61 };
  62
  63 MessageStringCollector::MessageStringCollector()
  64     : impl_(new Impl)
  65 {
  66 }
  67
  68 MessageStringCollector::~MessageStringCollector()
  69 {
  70 }
  71
  72 void MessageStringCollector::startContext(const char *name)
  73 {
  74     impl_->contexts_.emplace_back(name);
  75 }
  76
  77 void MessageStringCollector::append(const std::string &message)
  78 {
  79     int indent = static_cast<int>(impl_->prevContext_ * 2);
  80     if (!impl_->contexts_.empty())
  81     {
  82         std::vector<std::string>::const_iterator ci;
  83         for (ci = impl_->contexts_.begin() + impl_->prevContext_;
  84              ci != impl_->contexts_.end(); ++ci)
  85         {
  86             impl_->text_.append(indent, ' ');
  87             impl_->text_.append(*ci);
  88             impl_->text_.append("\n");
  89             indent += 2;
  90         }
  91     }
  92     impl_->prevContext_ = impl_->contexts_.size();
  93
  94     // TODO: Put this into a more generic helper, could be useful elsewhere
  95     size_t pos = 0;
  96     while (pos < message.size())
  97     {
  98         size_t nextpos = message.find_first_of('\n', pos);
  99         impl_->text_.append(indent, ' ');
 100         impl_->text_.append(message.substr(pos, nextpos - pos));
 101         impl_->text_.append("\n");
 102         if (nextpos == std::string::npos)
 103         {
 104             break;
 105         }
 106         pos = nextpos + 1;
 107     }
 108 }
 109
 110 void MessageStringCollector::finishContext()
 111 {
 112     GMX_RELEASE_ASSERT(!impl_->contexts_.empty(),
 113                        "finishContext() called without context");
 114     impl_->contexts_.pop_back();
 115     if (impl_->prevContext_ > impl_->contexts_.size())
 116     {
 117         impl_->prevContext_ = impl_->contexts_.size();
 118     }
 119 }
 120
 121 void MessageStringCollector::clear()
 122 {
 123     impl_->contexts_.clear();
 124     impl_->text_.clear();
 125     impl_->prevContext_ = 0;
 126 }
 127
 128 bool MessageStringCollector::isEmpty() const
 129 {
 130     return impl_->text_.empty();
 131 }
 132
 133 std::string MessageStringCollector::toString() const
 134 {
 135     return impl_->text_;
 136 }
 137
 138 } // namespace gmx