source/tracer.cpp

   1 /* $Id$
   2
   3 This file is part of gldbg
   4 Copyright © 2009-2011  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the GPL
   6 */
   7
   8 #include <stdexcept>
   9 #include "gldbg.h"
  10 #include "glprint.h"
  11 #include "tracer.h"
  12
  13 using namespace std;
  14
  15 Tracer::Tracer(GlDbg &dbg):
  16         glprint(new GlPrint(0, 16384)),
  17         out(0),
  18         close_out(true),
  19         enabled(true)
  20 {
  21         dbg.get_command_interpreter().register_command("trace", this, &Tracer::cmd_trace)
  22                 .set_help("Traces GL function calls",
  23                         "trace\n"
  24                         "  Send trace output to stdout.\n\n"
  25                         "trace FILE\n"
  26                         "  Send trace output to FILE (- for stdout).\n\n"
  27                         "trace {off|on}\n"
  28                         "  Temporarily suspend or resume trace without closing the file.\n\n"
  29                         "trace end\n"
  30                         "  Terminate trace, closing the file.\n");
  31 }
  32
  33 Tracer::~Tracer()
  34 {
  35         delete glprint;
  36         if(close_out && out)
  37                 fclose(out);
  38 }
  39
  40 void Tracer::set_output(FILE *o, bool d)
  41 {
  42         if(close_out && out)
  43                 fclose(out);
  44         out = o;
  45         close_out = d;
  46 }
  47
  48 void Tracer::decode(const char *data, unsigned len)
  49 {
  50         if(!enabled || !out)
  51                 return;
  52
  53         int ret = glprint->decode(data, len);
  54         if(ret>=0)
  55         {
  56                 const char *buf = glprint->get_buffer();
  57                 if(buf[0])
  58                         fprintf(out, "%s\n", buf);
  59         }
  60 }
  61
  62 void Tracer::cmd_trace(const string &args)
  63 {
  64         if(args.empty() || args=="-")
  65         {
  66                 set_output(stdout, false);
  67                 printf("Tracing to stdout\n");
  68         }
  69         else if(args=="on")
  70         {
  71                 if(!out)
  72                         throw runtime_error("Output is not set");
  73                 enabled = true;
  74                 printf("Tracing enabled\n");
  75         }
  76         else if(args=="off")
  77         {
  78                 enabled = false;
  79                 printf("Tracing disabled\n");
  80         }
  81         else if(args=="end")
  82         {
  83                 set_output(0, true);
  84                 printf("Tracing terminated\n");
  85         }
  86         else
  87         {
  88                 FILE *f = fopen(args.c_str(), "w");
  89                 if(!f)
  90                         throw runtime_error("Could not open trace file");
  91
  92                 set_output(f, true);
  93                 printf("Tracing to %s\n", args.c_str());
  94         }
  95 }