File ffidl.patch of Package ffidl
Index: generic/tclLoadDl.c
===================================================================
--- /dev/null
+++ generic/tclLoadDl.c
@@ -0,0 +1,227 @@
+/*
+ * tclLoadDl.c --
+ *
+ * This procedure provides a version of the TclLoadFile that works with
+ * the "dlopen" and "dlsym" library procedures for dynamic loading.
+ *
+ * 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: tclLoadDl.c,v 1.16 2006/06/13 22:10:19 dkf Exp $
+ */
+
+#include "tclInt.h"
+#ifdef NO_DLFCN_H
+# include "../compat/dlfcn.h"
+#else
+# include <dlfcn.h>
+#endif
+
+/*
+ * In some systems, like SunOS 4.1.3, the RTLD_NOW flag isn't defined and this
+ * argument to dlopen must always be 1. The RTLD_GLOBAL flag is needed on some
+ * systems (e.g. SCO and UnixWare) but doesn't exist on others; if it doesn't
+ * exist, set it to 0 so it has no effect.
+ */
+
+#ifndef RTLD_NOW
+# define RTLD_NOW 1
+#endif
+
+#ifndef RTLD_GLOBAL
+# define RTLD_GLOBAL 0
+#endif
+
+/*
+ *---------------------------------------------------------------------------
+ *
+ * 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. */
+{
+ void *handle;
+ CONST char *native;
+
+ /*
+ * 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);
+ handle = dlopen(native, RTLD_NOW | RTLD_GLOBAL);
+ if (handle == NULL) {
+ /*
+ * 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;
+ char *fileName = Tcl_GetString(pathPtr);
+
+ native = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds);
+ handle = dlopen(native, RTLD_NOW | RTLD_GLOBAL);
+ Tcl_DStringFree(&ds);
+ }
+
+ if (handle == NULL) {
+ /*
+ * Write the string to a variable first to work around a compiler bug
+ * in the Sun Forte 6 compiler. [Bug 1503729]
+ */
+
+ const char *errorStr = dlerror();
+
+ Tcl_AppendResult(interp, "couldn't load file \"",
+ Tcl_GetString(pathPtr), "\": ", errorStr, NULL);
+ return TCL_ERROR;
+ }
+
+ *unloadProcPtr = &TclpUnloadFile;
+ *loadHandle = (Tcl_LoadHandle) handle;
+ 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, /* Place to put error messages. */
+ Tcl_LoadHandle loadHandle, /* Value from TcpDlopen(). */
+ CONST char *symbol) /* Symbol to look up. */
+{
+ CONST char *native;
+ Tcl_DString newName, ds;
+ VOID *handle = (VOID*)loadHandle;
+ Tcl_PackageInitProc *proc;
+
+ /*
+ * Some platforms still add an underscore to the beginning of symbol
+ * names. If we can't find a name without an underscore, try again with
+ * the underscore.
+ */
+
+ native = Tcl_UtfToExternalDString(NULL, symbol, -1, &ds);
+ proc = (Tcl_PackageInitProc *) dlsym(handle, /* INTL: Native. */
+ native);
+ if (proc == NULL) {
+ Tcl_DStringInit(&newName);
+ Tcl_DStringAppend(&newName, "_", 1);
+ native = Tcl_DStringAppend(&newName, native, -1);
+ proc = (Tcl_PackageInitProc *) dlsym(handle, /* INTL: Native. */
+ native);
+ Tcl_DStringFree(&newName);
+ }
+ Tcl_DStringFree(&ds);
+
+ 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:
+ * Code removed from memory.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TclpUnloadFile(
+ Tcl_LoadHandle loadHandle) /* loadHandle returned by a previous call to
+ * TclpDlopen(). The loadHandle is a token
+ * that represents the loaded file. */
+{
+ void *handle;
+
+ handle = (void *) loadHandle;
+ dlclose(handle);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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:
+ */
