tclLoadNext.c Go to the documentation of this file. /* * 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) 1995-1997 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 1.13 2005/11/11 23:46:34 dkf Exp $ */ #include "tclInt.h" #include <mach-o/rld.h> #include <streams/streams.h>  /* *---------------------------------------------------------------------- * * TclpDlopen -- * * Dynamically loads a binary code file into memory and returns a handle * to the new code. * * Results: * A standard Tcl completion code. If an error occurs, an error message * is left in the interp's result. * * Side effects: * New code suddenly appears in memory. * *---------------------------------------------------------------------- */ int TclpDlopen( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Obj *pathPtr, /* Name of the file containing the desired * code (UTF-8). */ Tcl_LoadHandle *loadHandle, /* Filled with token for dynamically loaded * file which will be passed back to * (*unloadProcPtr)() to unload the file. */ Tcl_FSUnloadFileProc **unloadProcPtr) /* Filled with address of Tcl_FSUnloadFileProc * function which should be used for this * file. */ { struct mach_header *header; char *fileName; char *files[2]; CONST char *native; int result = 1; NXStream *errorStream = NXOpenMemory(0,0,NX_READWRITE); fileName = Tcl_GetString(pathPtr); /* * First try the full path the user gave us. This is particularly * important if the cwd is inside a vfs, and we are trying to load using a * relative path. */ native = Tcl_FSGetNativePath(pathPtr); files = {native,NULL}; result = rld_load(errorStream, &header, files, NULL); if (!result) { /* * Let the OS loader examine the binary search path for whatever * string the user gave us which hopefully refers to a file on the * binary path */ Tcl_DString ds; native = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds); files = {native,NULL}; result = rld_load(errorStream, &header, files, NULL); Tcl_DStringFree(&ds); } if (!result) { char *data; int len, maxlen; 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); *loadHandle = (Tcl_LoadHandle)1; /* A dummy non-NULL value */ *unloadProcPtr = &TclpUnloadFile; return TCL_OK; }  /* *---------------------------------------------------------------------- * * TclpFindSymbol -- * * Looks up a symbol, by name, through a handle associated with a * previously loaded piece of code (shared library). * * Results: * Returns a pointer to the function associated with 'symbol' if it is * found. Otherwise returns NULL and may leave an error message in the * interp's result. * *---------------------------------------------------------------------- */ Tcl_PackageInitProc * TclpFindSymbol( Tcl_Interp *interp, Tcl_LoadHandle loadHandle, CONST char *symbol) { Tcl_PackageInitProc *proc = NULL; if (symbol) { char sym[strlen(symbol) + 2]; sym[0] = '_'; sym[1] = 0; strcat(sym, symbol); rld_lookup(NULL, sym, (unsigned long *)&proc); } return proc; }  /* *---------------------------------------------------------------------- * * TclpUnloadFile -- * * Unloads a dynamically loaded binary code file from memory. Code * pointers in the formerly loaded file are no longer valid after calling * this function. * * Results: * None. * * Side effects: * Does nothing. Can anything be done? * *---------------------------------------------------------------------- */ void TclpUnloadFile( Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to * TclpDlopen(). The loadHandle is a token * that represents the loaded file. */ { }  /* *---------------------------------------------------------------------- * * 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( CONST 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; }  /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */

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