idlcomp/languages/c++/marshall.cc

   1 // C++ Marshalling
   2 //
   3 // This software is copyright (c) 2007 Scott Wood <scott@buserror.net>.
   4 //
   5 // This software is provided 'as-is', without any express or implied warranty.
   6 // In no event will the authors or contributors be held liable for any damages
   7 // arising from the use of this software.
   8 //
   9 // Permission is hereby granted to everyone, free of charge, to use, copy,
  10 // modify, prepare derivative works of, publish, distribute, perform,
  11 // sublicense, and/or sell copies of the Software, provided that the above
  12 // copyright notice and disclaimer of warranty be included in all copies or
  13 // substantial portions of this software.
  14
  15 #include "c++.h"
  16
  17 void CPPFile::output_ifaceinfo(Interface *iface)
  18 {
  19         extra_newline();
  20
  21 #if 0
  22         file << indent << "void _invoke(::System::RunTime::Array"
  23                        << "< ::System::RunTime::ID> objlist,\n"
  24              << indent << "             ::System::RunTime::ParamInfoBlock::Segment *segs,\n"
  25              << indent << "             int nsegs);\n\n";
  26 #endif
  27
  28         file << indent << "__attribute__((weak)) __attribute__((unused))\n"
  29              << indent << "::System::RunTime::IFaceInfo _info = {\n"
  30              << indent << "\t&_guid,\n"
  31              << indent << "};\n";
  32 }
  33
  34 void CPPFile::output_marshall(CompiledBasicType &cbt, Datum *d)
  35 {
  36         printf("marshall cbt\n");
  37 }
  38
  39 void CPPFile::align_type(Symbol *sym)
  40 {
  41         file << indent << "_ctx.buf.align_to(__alignof__(";
  42         cpp_output_name(file, sym);
  43         file << "));\n";
  44 }
  45
  46 void CPPFile::grow_buf(Symbol *sym)
  47 {
  48         file << indent << "_ptr = _ctx.buf.grow_by(sizeof(";
  49         cpp_output_name(file, sym);
  50         file << "));\n";
  51 }
  52
  53 void CPPFile::output_marshall(Struct *sym, Datum *d)
  54 {
  55         bool is_inline = !d || d->is_inline();
  56
  57         if (d && !d->is_inline())       {
  58                 extra_newline();
  59                 file << indent << "if (" << **d->name << ")\n"
  60                      << indent << '\t' << **d->name << "->_marshall(_ctx);\n";
  61
  62                 return;
  63         }
  64
  65         if (!d) {
  66                 extra_newline();
  67                 align_type(sym);
  68                 grow_buf(sym);
  69
  70                 file << indent << "memcpy(_ptr, this, sizeof(*this));\n";
  71         }
  72
  73         if (sym->is_plain_data()) {
  74                 printf("plain data\n");
  75                 return;
  76         }
  77
  78         for (Struct::entries_iterator i = sym->entries_begin();
  79              i != sym->entries_end(); ++i)
  80         {
  81                 extra_newline();
  82                 Datum *d = *i;
  83
  84                 if (d->type)
  85                         d->type->output_lang(this, trav_marshall, d);
  86                 else
  87                         output_marshall(d->def.basictype, d);
  88         }
  89 }
  90
  91 void CPPFile::output_marshall(Interface *sym, Datum *d)
  92 {
  93         printf("marshall iface\n");
  94 }
  95
  96 void CPPFile::output_marshall(Enum *sym, Datum *d)
  97 {
  98         printf("marshall enum\n");
  99 }
 100
 101 void CPPFile::output_marshall(BitField *sym, Datum *d)
 102 {
 103         printf("marshall bitfield\n");
 104 }
 105
 106 void CPPFile::output_marshall(BasicType *sym, Datum *d)
 107 {
 108         printf("marshall basictype\n");
 109 }
 110
 111 void CPPFile::output_marshall_pass(Struct *sym, int pass)
 112 {
 113         switch (pass) {
 114                 case trav_nsdecl:
 115                         extra_newline();
 116
 117                         file << indent << "int _marshall(::System::RunTime::MarshCtx &_ctx);\n";
 118                         file << indent << "void _unmarshall(::System::RunTime::MarshCtx &_ctx);\n";
 119                         break;
 120
 121                 case trav_full:
 122                         extra_newline();
 123
 124                         file << indent << "int _marshall(::System::RunTime::MarshCtx &_ctx)\n"
 125                              << indent << "{\n"
 126                              << indent << "\tvoid *_ptr;\n";
 127
 128                         indent.indent_level++;
 129                         output_marshall(sym, NULL);
 130                         indent.indent_level--;
 131
 132                         file << indent << "\treturn 0;\n"
 133                              << indent << "}\n\n";
 134
 135                         file << indent << "void _unmarshall(::System::RunTime::Array<uint8_t, ::System::RunTime::ORBMM> buf,\n"
 136                              << indent << "                 ::System::RunTime::Array< ::System::_i_Object *, ::System::RunTime::ORBMM> objlist,\n"
 137                              << indent << "                 ::System::RunTime::ParamInfoBlock::Segment *segs,\n"
 138                              << indent << "                 int nsegs)\n"
 139                              << indent << "{\n"
 140                              << indent << "}\n";
 141
 142                         break;
 143         }
 144 }