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/*

 * tclLoadNext.c --

 *

 *      This procedure provides a version of the TclLoadFile that

 *      works with NeXTs rld_* dynamic loading.  This file provided

 *      by Pedja Bogdanovich.

 *

 * Copyright (c) 1995 Sun Microsystems, Inc.

 *

 * See the file "license.terms" for information on usage and redistribution

 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.

 *

 * RCS: @(#) $Id: tclLoadNext.c,v 1.1.1.1 2002-01-16 10:25:37 markom Exp $

 */

#include "tclInt.h"

#include <mach-o/rld.h>

#include <streams/streams.h>

/*

 *----------------------------------------------------------------------

 *

 * TclLoadFile --

 *

 *      Dynamically loads a binary code file into memory and returns

 *      the addresses of two procedures within that file, if they

 *      are defined.

 *

 * Results:

 *      A standard Tcl completion code.  If an error occurs, an error

 *      message is left in interp->result.  *proc1Ptr and *proc2Ptr

 *      are filled in with the addresses of the symbols given by

 *      *sym1 and *sym2, or NULL if those symbols can't be found.

 *

 * Side effects:

 *      New code suddenly appears in memory.

 *

 *----------------------------------------------------------------------

 */

int

TclLoadFile(interp, fileName, sym1, sym2, proc1Ptr, proc2Ptr)

    Tcl_Interp *interp;         /* Used for error reporting. */

    char *fileName;             /* Name of the file containing the desired

                                 * code. */

    char *sym1, *sym2;          /* Names of two procedures to look up in

                                 * the file's symbol table. */

    Tcl_PackageInitProc **proc1Ptr, **proc2Ptr;

                                /* Where to return the addresses corresponding

                                 * to sym1 and sym2. */

{

  struct mach_header *header;

  char *data;

  int len, maxlen;

  char *files[]={fileName,NULL};

  NXStream *errorStream=NXOpenMemory(0,0,NX_READWRITE);

  if(!rld_load(errorStream,&header,files,NULL)) {

    NXGetMemoryBuffer(errorStream,&data,&len,&maxlen);

    Tcl_AppendResult(interp,"couldn't load file \"",fileName,"\": ",data,NULL);

    NXCloseMemory(errorStream,NX_FREEBUFFER);

    return TCL_ERROR;

  }

  NXCloseMemory(errorStream,NX_FREEBUFFER);

  *proc1Ptr=NULL;

  if(sym1) {

    char sym[strlen(sym1)+2];

    sym[0]='_'; sym[1]=0; strcat(sym,sym1);

    rld_lookup(NULL,sym,(unsigned long *)proc1Ptr);

  }

  *proc2Ptr=NULL;

  if(sym2) {

    char sym[strlen(sym2)+2];

    sym[0]='_'; sym[1]=0; strcat(sym,sym2);

    rld_lookup(NULL,sym,(unsigned long *)proc2Ptr);

  }

  return TCL_OK;

}

/*

 *----------------------------------------------------------------------

 *

 * TclGuessPackageName --

 *

 *      If the "load" command is invoked without providing a package

 *      name, this procedure is invoked to try to figure it out.

 *

 * Results:

 *      Always returns 0 to indicate that we couldn't figure out a

 *      package name;  generic code will then try to guess the package

 *      from the file name.  A return value of 1 would have meant that

 *      we figured out the package name and put it in bufPtr.

 *

 * Side effects:

 *      None.

 *

 *----------------------------------------------------------------------

 */

int

TclGuessPackageName(fileName, bufPtr)

    char *fileName;             /* Name of file containing package (already

                                 * translated to local form if needed). */

    Tcl_DString *bufPtr;        /* Initialized empty dstring.  Append

                                 * package name to this if possible. */

{

    return 0;

}