#!/usr/bin/perl

# create cpjit.h

open STDOUT, ">cpjit.h"
  or die "cpijit.h: $!";

$CPJIT_MAX_ARGS = 9;

print <<EOF;
#line 12 "cpjit.h.PL"
/*
    This file is AUTOMAGICALLY created by cpjit.h.PL. Modifications will
    be lost.

    cpjit.h -- c portable jit in time compiler
    Copyright (C) 2005      Marc Lehmann <cpjit\@schmorp.de>
 
    This file is part of libcpjit.

    libcpjit is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with gvpe; if not, write to the Free Software
    Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

#include <string>
#include <sstream>
#include <inttypes.h>

namespace cpjit
{

#define CPJIT_MAX_ARGS $CPJIT_MAX_ARGS
#define CPJIT_NULLID ""

// environment for persistent or temporary storage
struct env
{
  std::string path, idxpath;
  bool temporary;
  int idxfd;
  long idxstamp;

  void dolock (bool lock);
  void lock ();
  void unlock ();

  void load_index ();
  void save_index ();

public:
  env (const std::string &path = CPJIT_NULLID, bool temporary = true);
  ~env ();

  // compact all fragments && invalidate ALL pointers
  void compact ();
  // completely delete the environment on disk
  void clear ();
};

struct fun
{
  env &e;
  std::string id, source;
  void *funptr;

  fun (env &e, const std::string &id, const std::string &source);

  // is compiled function available?
  bool compiled ()
  {
    return funptr;
  }

  // returns the function pointer
  void *ptr ();
};

struct funbuild : std::ostringstream
{
  env &e;
  std::string retlist, arglist;

  funbuild (env &e, const char *rettype, ...);
  void finish (std::string &id, std::string &source);
};

typedef unsigned char U8;
typedef   signed char I8;
typedef uint16_t      U16;
typedef  int16_t      I16;
typedef uint32_t      U32;
typedef  int32_t      I32;
typedef uint64_t      U64;
typedef  int64_t      I64;
typedef float         FLT;
typedef double        DBL;
typedef void *        PTR;

template<typename T> struct typestr { };

template<> struct typestr<U8   > { static const char str[]; };
template<> struct typestr<U16  > { static const char str[]; };
template<> struct typestr<U32  > { static const char str[]; };
template<> struct typestr<U64  > { static const char str[]; };
template<> struct typestr<I8   > { static const char str[]; };
template<> struct typestr<I16  > { static const char str[]; };
template<> struct typestr<I32  > { static const char str[]; };
template<> struct typestr<I64  > { static const char str[]; };
template<> struct typestr<FLT  > { static const char str[]; };
template<> struct typestr<DBL  > { static const char str[]; };
template<> struct typestr<PTR  > { static const char str[]; };
template<> struct typestr<U8  *> { static const char str[]; };
template<> struct typestr<U16 *> { static const char str[]; };
template<> struct typestr<U32 *> { static const char str[]; };
template<> struct typestr<U64 *> { static const char str[]; };
template<> struct typestr<I8  *> { static const char str[]; };
template<> struct typestr<I16 *> { static const char str[]; };
template<> struct typestr<I32 *> { static const char str[]; };
template<> struct typestr<I64 *> { static const char str[]; };
template<> struct typestr<FLT *> { static const char str[]; };
template<> struct typestr<DBL *> { static const char str[]; };

EOF

for (0 .. $CPJIT_MAX_ARGS) {
  print <<EOF;
#line 133 "cpjit.h.PL"

template<typename R${\( join "", map ", typename A$_", 1..$_ )}>
struct fun$_ : fun
{
  fun$_ (env &e, const std::string &id, const std::string &source)
  : fun(e, id, source)
  {
  }

  int operator ()(${\( join ", ", map "A$_ a$_", 1..$_ )})
  {
    return ((R (*)(${\( join ", ", map "A$_", 1..$_ )})) ptr ())(${\( join ", ", map "a$_", 1..$_ )});
  }
};

template<typename R${\( join "", map ", typename A$_", 1..$_ )}>
struct funbuild$_ : funbuild
{
  funbuild$_ (env &e)
  : funbuild(e, typestr<R>::str${\( join "", map ", typestr<A$_>::str", 1..$_ )}, (const char *)0)
  {
  }

  fun$_<R${\( join "", map ", A$_", 1..$_ )}> *get ()
  {
    std::string id, source;
    finish (id, source);
    return new fun$_<R${\( join "", map ", A$_", 1..$_ )}> (e, id, source);
  }
};

EOF
}

print <<EOF;
}
EOF