os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/unix/tclLoadNext.c
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/unix/tclLoadNext.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,186 @@
1.4 +/*
1.5 + * tclLoadNext.c --
1.6 + *
1.7 + * This procedure provides a version of the TclLoadFile that
1.8 + * works with NeXTs rld_* dynamic loading. This file provided
1.9 + * by Pedja Bogdanovich.
1.10 + *
1.11 + * Copyright (c) 1995-1997 Sun Microsystems, Inc.
1.12 + *
1.13 + * See the file "license.terms" for information on usage and redistribution
1.14 + * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
1.15 + *
1.16 + * RCS: @(#) $Id: tclLoadNext.c,v 1.11 2002/10/10 12:25:53 vincentdarley Exp $
1.17 + */
1.18 +
1.19 +#include "tclInt.h"
1.20 +#include <mach-o/rld.h>
1.21 +#include <streams/streams.h>
1.22 +
1.23 +/*
1.24 + *----------------------------------------------------------------------
1.25 + *
1.26 + * TclpDlopen --
1.27 + *
1.28 + * Dynamically loads a binary code file into memory and returns
1.29 + * a handle to the new code.
1.30 + *
1.31 + * Results:
1.32 + * A standard Tcl completion code. If an error occurs, an error
1.33 + * message is left in the interp's result.
1.34 + *
1.35 + * Side effects:
1.36 + * New code suddenly appears in memory.
1.37 + *
1.38 + *----------------------------------------------------------------------
1.39 + */
1.40 +
1.41 +int
1.42 +TclpDlopen(interp, pathPtr, loadHandle, unloadProcPtr)
1.43 + Tcl_Interp *interp; /* Used for error reporting. */
1.44 + Tcl_Obj *pathPtr; /* Name of the file containing the desired
1.45 + * code (UTF-8). */
1.46 + Tcl_LoadHandle *loadHandle; /* Filled with token for dynamically loaded
1.47 + * file which will be passed back to
1.48 + * (*unloadProcPtr)() to unload the file. */
1.49 + Tcl_FSUnloadFileProc **unloadProcPtr;
1.50 + /* Filled with address of Tcl_FSUnloadFileProc
1.51 + * function which should be used for
1.52 + * this file. */
1.53 +{
1.54 + struct mach_header *header;
1.55 + char *fileName;
1.56 + char *files[2];
1.57 + CONST char *native;
1.58 + int result = 1;
1.59 +
1.60 + NXStream *errorStream = NXOpenMemory(0,0,NX_READWRITE);
1.61 +
1.62 + fileName = Tcl_GetString(pathPtr);
1.63 +
1.64 + /*
1.65 + * First try the full path the user gave us. This is particularly
1.66 + * important if the cwd is inside a vfs, and we are trying to load
1.67 + * using a relative path.
1.68 + */
1.69 + native = Tcl_FSGetNativePath(pathPtr);
1.70 + files = {native,NULL};
1.71 +
1.72 + result = rld_load(errorStream, &header, files, NULL);
1.73 +
1.74 + if (!result) {
1.75 + /*
1.76 + * Let the OS loader examine the binary search path for
1.77 + * whatever string the user gave us which hopefully refers
1.78 + * to a file on the binary path
1.79 + */
1.80 + Tcl_DString ds;
1.81 + native = Tcl_UtfToExternalDString(NULL, fileName, -1, &ds);
1.82 + files = {native,NULL};
1.83 + result = rld_load(errorStream, &header, files, NULL);
1.84 + Tcl_DStringFree(&ds);
1.85 + }
1.86 +
1.87 + if (!result) {
1.88 + char *data;
1.89 + int len, maxlen;
1.90 + NXGetMemoryBuffer(errorStream,&data,&len,&maxlen);
1.91 + Tcl_AppendResult(interp, "couldn't load file \"",
1.92 + fileName, "\": ", data, NULL);
1.93 + NXCloseMemory(errorStream, NX_FREEBUFFER);
1.94 + return TCL_ERROR;
1.95 + }
1.96 + NXCloseMemory(errorStream, NX_FREEBUFFER);
1.97 +
1.98 + *loadHandle = (Tcl_LoadHandle)1; /* A dummy non-NULL value */
1.99 + *unloadProcPtr = &TclpUnloadFile;
1.100 +
1.101 + return TCL_OK;
1.102 +}
1.103 +
1.104 +/*
1.105 + *----------------------------------------------------------------------
1.106 + *
1.107 + * TclpFindSymbol --
1.108 + *
1.109 + * Looks up a symbol, by name, through a handle associated with
1.110 + * a previously loaded piece of code (shared library).
1.111 + *
1.112 + * Results:
1.113 + * Returns a pointer to the function associated with 'symbol' if
1.114 + * it is found. Otherwise returns NULL and may leave an error
1.115 + * message in the interp's result.
1.116 + *
1.117 + *----------------------------------------------------------------------
1.118 + */
1.119 +Tcl_PackageInitProc*
1.120 +TclpFindSymbol(interp, loadHandle, symbol)
1.121 + Tcl_Interp *interp;
1.122 + Tcl_LoadHandle loadHandle;
1.123 + CONST char *symbol;
1.124 +{
1.125 + Tcl_PackageInitProc *proc=NULL;
1.126 + if(symbol) {
1.127 + char sym[strlen(symbol)+2];
1.128 + sym[0]='_'; sym[1]=0; strcat(sym,symbol);
1.129 + rld_lookup(NULL,sym,(unsigned long *)&proc);
1.130 + }
1.131 + return proc;
1.132 +}
1.133 +
1.134 +/*
1.135 + *----------------------------------------------------------------------
1.136 + *
1.137 + * TclpUnloadFile --
1.138 + *
1.139 + * Unloads a dynamically loaded binary code file from memory.
1.140 + * Code pointers in the formerly loaded file are no longer valid
1.141 + * after calling this function.
1.142 + *
1.143 + * Results:
1.144 + * None.
1.145 + *
1.146 + * Side effects:
1.147 + * Does nothing. Can anything be done?
1.148 + *
1.149 + *----------------------------------------------------------------------
1.150 + */
1.151 +
1.152 +void
1.153 +TclpUnloadFile(loadHandle)
1.154 + Tcl_LoadHandle loadHandle; /* loadHandle returned by a previous call
1.155 + * to TclpDlopen(). The loadHandle is
1.156 + * a token that represents the loaded
1.157 + * file. */
1.158 +{
1.159 +}
1.160 +
1.161 +/*
1.162 + *----------------------------------------------------------------------
1.163 + *
1.164 + * TclGuessPackageName --
1.165 + *
1.166 + * If the "load" command is invoked without providing a package
1.167 + * name, this procedure is invoked to try to figure it out.
1.168 + *
1.169 + * Results:
1.170 + * Always returns 0 to indicate that we couldn't figure out a
1.171 + * package name; generic code will then try to guess the package
1.172 + * from the file name. A return value of 1 would have meant that
1.173 + * we figured out the package name and put it in bufPtr.
1.174 + *
1.175 + * Side effects:
1.176 + * None.
1.177 + *
1.178 + *----------------------------------------------------------------------
1.179 + */
1.180 +
1.181 +int
1.182 +TclGuessPackageName(fileName, bufPtr)
1.183 + CONST char *fileName; /* Name of file containing package (already
1.184 + * translated to local form if needed). */
1.185 + Tcl_DString *bufPtr; /* Initialized empty dstring. Append
1.186 + * package name to this if possible. */
1.187 +{
1.188 + return 0;
1.189 +}