granicus.if.org Git - icinga2/blob - lib/base/debuginfo.cpp

   1 /* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
   2
   3 #include "base/debuginfo.hpp"
   4 #include "base/convert.hpp"
   5 #include <fstream>
   6
   7 using namespace icinga;
   8
   9 /**
  10  * Outputs a DebugInfo struct to a stream.
  11  *
  12  * @param out The output stream.
  13  * @param val The DebugInfo struct.
  14  * @returns The output stream.
  15  */
  16 std::ostream& icinga::operator<<(std::ostream& out, const DebugInfo& val)
  17 {
  18         out << "in " << val.Path << ": "
  19                 << val.FirstLine << ":" << val.FirstColumn
  20                 << "-"
  21                 << val.LastLine << ":" << val.LastColumn;
  22
  23         return out;
  24 }
  25
  26 DebugInfo icinga::DebugInfoRange(const DebugInfo& start, const DebugInfo& end)
  27 {
  28         DebugInfo result;
  29         result.Path = start.Path;
  30         result.FirstLine = start.FirstLine;
  31         result.FirstColumn = start.FirstColumn;
  32         result.LastLine = end.LastLine;
  33         result.LastColumn = end.LastColumn;
  34         return result;
  35 }
  36
  37 #define EXTRA_LINES 2
  38
  39 void icinga::ShowCodeLocation(std::ostream& out, const DebugInfo& di, bool verbose)
  40 {
  41         if (di.Path.IsEmpty())
  42                 return;
  43
  44         out << "Location: " << di;
  45
  46         std::ifstream ifs;
  47         ifs.open(di.Path.CStr(), std::ifstream::in);
  48
  49         int lineno = 0;
  50         char line[1024];
  51
  52         while (ifs.good() && lineno <= di.LastLine + EXTRA_LINES) {
  53                 if (lineno == 0)
  54                         out << "\n";
  55
  56                 lineno++;
  57
  58                 ifs.getline(line, sizeof(line));
  59
  60                 for (int i = 0; line[i]; i++)
  61                         if (line[i] == '\t')
  62                                 line[i] = ' ';
  63
  64                 int extra_lines = verbose ? EXTRA_LINES : 0;
  65
  66                 if (lineno < di.FirstLine - extra_lines || lineno > di.LastLine + extra_lines)
  67                         continue;
  68
  69                 String pathInfo = di.Path + "(" + Convert::ToString(lineno) + "): ";
  70                 out << pathInfo;
  71                 out << line << "\n";
  72
  73                 if (lineno >= di.FirstLine && lineno <= di.LastLine) {
  74                         int start, end;
  75
  76                         start = 0;
  77                         end = strlen(line);
  78
  79                         if (lineno == di.FirstLine)
  80                                 start = di.FirstColumn - 1;
  81
  82                         if (lineno == di.LastLine)
  83                                 end = di.LastColumn;
  84
  85                         if (start < 0) {
  86                                 end -= start;
  87                                 start = 0;
  88                         }
  89
  90                         out << String(pathInfo.GetLength(), ' ');
  91                         out << String(start, ' ');
  92                         out << String(end - start, '^');
  93
  94                         out << "\n";
  95                 }
  96         }
  97 }
  98