source/tracer.cpp

   1 /* $Id$
   2
   3 This file is part of gldbg
   4 Copyright © 2009-2010  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the GPL
   6 */
   7
   8 #include <msp/io/file.h>
   9 #include <msp/io/print.h>
  10 #include "gldbg.h"
  11 #include "glprint.h"
  12 #include "tracer.h"
  13
  14 using namespace std;
  15 using namespace Msp;
  16
  17 Tracer::Tracer(GlDbg &dbg):
  18         glprint(new GlPrint(0, 16384)),
  19         out(0),
  20         delete_out(true),
  21         enabled(true)
  22 {
  23         dbg.get_command_interpreter().register_command("trace", this, &Tracer::cmd_trace)
  24                 .set_help("Traces GL function calls",
  25                         "trace\n"
  26                         "  Send trace output to stdout.\n\n"
  27                         "trace FILE\n"
  28                         "  Send trace output to FILE (- for stdout).\n\n"
  29                         "trace {off|on}\n"
  30                         "  Temporarily suspend or resume trace without closing the file.\n\n"
  31                         "trace end\n"
  32                         "  Terminate trace, closing the file.\n");
  33 }
  34
  35 Tracer::~Tracer()
  36 {
  37         delete glprint;
  38         if(delete_out)
  39                 delete out;
  40 }
  41
  42 void Tracer::set_output(IO::Base *o, bool d)
  43 {
  44         if(delete_out)
  45                 delete out;
  46         out = o;
  47         delete_out = d;
  48 }
  49
  50 void Tracer::decode(const char *data, unsigned len)
  51 {
  52         if(!enabled || !out)
  53                 return;
  54
  55         int ret = glprint->decode(data, len);
  56         if(ret>=0)
  57         {
  58                 const char *buf = glprint->get_buffer();
  59                 if(buf[0])
  60                         IO::print(*out, "%s\n", buf);
  61         }
  62 }
  63
  64 void Tracer::cmd_trace(const string &args)
  65 {
  66         if(args.empty() || args=="-")
  67         {
  68                 set_output(&IO::cout, false);
  69                 IO::print("Tracing to stdout\n");
  70         }
  71         else if(args=="on")
  72         {
  73                 if(!out)
  74                         throw InvalidState("Output is not set");
  75                 enabled = true;
  76                 IO::print("Tracing enabled\n");
  77         }
  78         else if(args=="off")
  79         {
  80                 enabled = false;
  81                 IO::print("Tracing disabled\n");
  82         }
  83         else if(args=="end")
  84         {
  85                 set_output(0, true);
  86                 IO::print("Tracing terminated\n");
  87         }
  88         else
  89         {
  90                 set_output(new IO::File(args, IO::M_WRITE), true);
  91                 IO::print("Tracing to %s\n", args);
  92         }
  93 }