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ca20eeab97
git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15184 87f5fb63-7c3d-0410-a384-fd976d0f7a62
726 lines
18 KiB
C
726 lines
18 KiB
C
/*
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* $Id: amiga_rexxvars.c,v 1.14 2008-04-14 15:16:03 obarthel Exp $
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*
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* :ts=4
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*
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* Portable ISO 'C' (1994) runtime library for the Amiga computer
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* Copyright (c) 2002-2006 by Olaf Barthel <olsen (at) sourcery.han.de>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Neither the name of Olaf Barthel nor the names of contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* We don't want to pull in <clib/alib_protos.h> */
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#define CLIB_ALIB_PROTOS_H
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/****************************************************************************/
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#ifndef _STDLIB_HEADERS_H
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#include "stdlib_headers.h"
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#endif /* _STDLIB_HEADERS_H */
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/****************************************************************************/
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#ifndef _STDLIB_CONSTRUCTOR_H
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#include "stdlib_constructor.h"
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#endif /* _STDLIB_CONSTRUCTOR_H */
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/****************************************************************************/
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#include <rexx/rxslib.h>
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#include <rexx/errors.h>
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/****************************************************************************/
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struct Environment;
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/****************************************************************************/
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#define __NOLIBBASE__
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#include <proto/rexxsyslib.h>
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/****************************************************************************/
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/* This side-steps issues with very old inline header files, predating the
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OS 3.5 SDK, when the library is built for the 68k platform. */
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#if defined(__GNUC__) && !defined(__amigaos4__)
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#define __GetRexxVarFromMsg(name, buffer, message) ({ \
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STRPTR _GetRexxVarFromMsg_name = (name); \
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STRPTR _GetRexxVarFromMsg_buffer = (buffer); \
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struct RexxMsg * _GetRexxVarFromMsg_message = (message); \
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LONG _GetRexxVarFromMsg__re = \
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({ \
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register struct RxsLib * const __GetRexxVarFromMsg__bn __asm("a6") = (struct RxsLib *) (RexxSysBase);\
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register LONG __GetRexxVarFromMsg__re __asm("d0"); \
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register STRPTR __GetRexxVarFromMsg_name __asm("a0") = (_GetRexxVarFromMsg_name); \
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register STRPTR __GetRexxVarFromMsg_buffer __asm("a1") = (_GetRexxVarFromMsg_buffer); \
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register struct RexxMsg * __GetRexxVarFromMsg_message __asm("a2") = (_GetRexxVarFromMsg_message); \
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__asm volatile ("jsr a6@(-492:W)" \
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: "=r"(__GetRexxVarFromMsg__re) \
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: "r"(__GetRexxVarFromMsg__bn), "r"(__GetRexxVarFromMsg_name), "r"(__GetRexxVarFromMsg_buffer), "r"(__GetRexxVarFromMsg_message) \
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: "d1", "a0", "a1", "fp0", "fp1", "cc", "memory"); \
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__GetRexxVarFromMsg__re; \
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}); \
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_GetRexxVarFromMsg__re; \
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})
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#undef GetRexxVarFromMsg
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#define GetRexxVarFromMsg(name, buffer, message) __GetRexxVarFromMsg(name, buffer, message)
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#define __SetRexxVarFromMsg(name, value, message) ({ \
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STRPTR _SetRexxVarFromMsg_name = (name); \
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STRPTR _SetRexxVarFromMsg_value = (value); \
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struct RexxMsg * _SetRexxVarFromMsg_message = (message); \
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LONG _SetRexxVarFromMsg__re = \
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({ \
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register struct RxsLib * const __SetRexxVarFromMsg__bn __asm("a6") = (struct RxsLib *) (RexxSysBase);\
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register LONG __SetRexxVarFromMsg__re __asm("d0"); \
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register STRPTR __SetRexxVarFromMsg_name __asm("a0") = (_SetRexxVarFromMsg_name); \
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register STRPTR __SetRexxVarFromMsg_value __asm("a1") = (_SetRexxVarFromMsg_value); \
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register struct RexxMsg * __SetRexxVarFromMsg_message __asm("a2") = (_SetRexxVarFromMsg_message); \
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__asm volatile ("jsr a6@(-498:W)" \
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: "=r"(__SetRexxVarFromMsg__re) \
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: "r"(__SetRexxVarFromMsg__bn), "r"(__SetRexxVarFromMsg_name), "r"(__SetRexxVarFromMsg_value), "r"(__SetRexxVarFromMsg_message) \
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: "d1", "a0", "a1", "fp0", "fp1", "cc", "memory"); \
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__SetRexxVarFromMsg__re; \
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}); \
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_SetRexxVarFromMsg__re; \
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})
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#undef SetRexxVarFromMsg
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#define SetRexxVarFromMsg(name, value, message) __SetRexxVarFromMsg(name, value, message)
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#endif /* __GNUC__ && !__amigaos4__ */
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/****************************************************************************/
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static struct Library * RexxSysBase;
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/****************************************************************************/
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#if defined(__amigaos4__)
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static struct RexxSysIFace * IRexxSys;
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#endif /* __amigaos4__ */
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/****************************************************************************/
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BOOL CheckRexxMsg(struct RexxMsg *message);
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LONG GetRexxVar(struct RexxMsg *message,STRPTR variable_name,STRPTR *buffer_pointer);
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LONG SetRexxVar(struct RexxMsg *message,STRPTR variable_name,STRPTR value,LONG length);
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/****************************************************************************/
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CLIB_CONSTRUCTOR(rexxvars_init)
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{
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ENTER();
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RexxSysBase = OpenLibrary(RXSNAME,0);
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#if defined(__amigaos4__)
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{
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if(RexxSysBase != NULL)
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{
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IRexxSys = (struct RexxSysIFace *)GetInterface(RexxSysBase, "main", 1, 0);
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if(IRexxSys == NULL)
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{
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CloseLibrary(RexxSysBase);
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RexxSysBase = NULL;
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}
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}
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}
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#endif /* __amigaos4__ */
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LEAVE();
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CONSTRUCTOR_SUCCEED();
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}
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/****************************************************************************/
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CLIB_DESTRUCTOR(rexxvars_exit)
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{
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ENTER();
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#if defined(__amigaos4__)
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{
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if(IRexxSys != NULL)
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DropInterface((struct Interface *)IRexxSys);
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IRexxSys = NULL;
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}
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#endif /* __amigaos4__ */
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if(RexxSysBase != NULL)
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{
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CloseLibrary(RexxSysBase);
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RexxSysBase = NULL;
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}
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LEAVE();
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}
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/****************************************************************************/
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/* This is modeled after the original assembly language code. Except for the
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fact that we compare the library base against a local, static variable
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rather then opening the library for each check. */
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BOOL
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CheckRexxMsg(struct RexxMsg *message)
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{
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BOOL result = FALSE;
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if(RexxSysBase == NULL)
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goto out;
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if(message->rm_LibBase != RexxSysBase)
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goto out;
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if(message->rm_TaskBlock == NULL)
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goto out;
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if(NOT IsRexxMsg(message))
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goto out;
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result = TRUE;
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out:
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return(result);
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}
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/****************************************************************************/
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#if 1
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/****************************************************************************/
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/* The following function works in about like the original, except that it's
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not reentrant, does not fill in a pointer to the variable itself and
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requires rexxsyslib.library V45. */
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LONG
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GetRexxVar(struct RexxMsg *message,STRPTR variable_name,STRPTR *buffer_pointer)
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{
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static TEXT buffer[256];
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LONG result;
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/* The following uses a function which was added to rexxsyslib.library V45.
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We therefore have a minimum library version requirement. */
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if(RexxSysBase == NULL || RexxSysBase->lib_Version < 45 || NOT IsRexxMsg(message))
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{
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result = ERR10_010; /* invalid message packet */
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goto out;
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}
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/* The 256 character limit isn't good. This should be done differently. */
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result = GetRexxVarFromMsg(variable_name,buffer,message);
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if(result != 0)
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goto out;
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(*buffer_pointer) = buffer;
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out:
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return(result);
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}
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/****************************************************************************/
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/* The following function works in about like the original, except that it
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ignores the length parameter (the value needs to be a NUL-terminated string)
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and requires rexxsyslib.library V45. */
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LONG
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SetRexxVar(struct RexxMsg *message,STRPTR variable_name,STRPTR value,ULONG length)
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{
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LONG result;
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/* The following uses a function which was added to rexxsyslib.library V45.
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We therefore have a minimum library version requirement. */
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if(RexxSysBase == NULL || RexxSysBase->lib_Version < 45 || NOT IsRexxMsg(message))
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{
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result = ERR10_010; /* invalid message packet */
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goto out;
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}
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result = SetRexxVarFromMsg(variable_name,value,message);
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out:
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return(result);
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}
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/****************************************************************************/
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#else
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/****************************************************************************/
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#if defined(__GNUC__) && !defined(__amigaos4__)
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/****************************************************************************/
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/* A selection of lovingly hand-crafted 68k stub functions which call
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into rexxsyslib.library LVOs that still used to be documented back
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in 1987. */
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/****************************************************************************/
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#if defined(SMALL_DATA)
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#define A4(x) "a4@(" #x ":W)"
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#elif defined(SMALL_DATA32)
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#define A4(x) "a4@(" #x ":L)"
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#else
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#define A4(x) #x
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#endif /* SMALL_DATA */
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _RexxSysBase
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.globl __FreeSpace
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__FreeSpace:
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moveal sp@(4),a0
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moveal sp@(8),a1
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movel sp@(12),d0
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-120)
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moveal sp@+,a6
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rts
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");
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _RexxSysBase
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.globl __GetSpace
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__GetSpace:
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moveal sp@(4),a0
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movel sp@(8),d0
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-114)
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moveal sp@+,a6
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rts
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");
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _RexxSysBase
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.globl __IsSymbol
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__IsSymbol:
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moveal sp@(4),a0
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-102)
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moveal sp@+,a6
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moveal sp@(8),a1
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movel d1,a1@
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rts
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");
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _RexxSysBase
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.globl __CurrentEnv
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__CurrentEnv:
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moveal sp@(4),a0
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-108)
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moveal sp@+,a6
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moveal sp@(8),a1
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movel a0,a1@
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rts
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");
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _RexxSysBase
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.globl __FetchValue
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__FetchValue:
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moveal sp@(4),a0
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moveal sp@(8),a1
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movel sp@(12),d0
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movel sp@(16),d1
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-72)
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moveal sp@+,a6
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moveal sp@(20),a1
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movel a0,a1@
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moveal sp@(24),a1
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movel d1,a1@
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rts
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");
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _RexxSysBase
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.globl __EnterSymbol
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__EnterSymbol:
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moveal sp@(4),a0
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moveal sp@(8),a1
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movel sp@(12),d0
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-66)
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moveal sp@+,a6
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rts
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");
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/****************************************************************************/
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asm("
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.text
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.even
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.globl _RexxSysBase
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.globl __FreeSpace
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__SetValue:
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moveal sp@(4),a0
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moveal sp@(8),a1
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movel sp@(12),d0
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-84)
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moveal sp@+,a6
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rts
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");
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/****************************************************************************/
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asm("
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.text
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.even
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|
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.globl _RexxSysBase
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.globl __FreeSpace
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__StrcpyN:
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moveal sp@(4),a0
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moveal sp@(8),a1
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movel sp@(12),d0
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movel a6,sp@-
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moveal "A4(_RexxSysBase)",a6
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jsr a6@(-270)
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moveal sp@+,a6
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moveal sp@(16),a1
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movel d1,a1@
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rts
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");
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/****************************************************************************/
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#endif /* __GNUC__ && !__amigaos4__ */
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/****************************************************************************/
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/* Function prototypes for the 68k stubs. */
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extern VOID _FreeSpace(struct Environment * env,APTR mem,LONG size);
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extern APTR _GetSpace(struct Environment * env,LONG size);
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extern LONG _IsSymbol(STRPTR name,LONG * symbol_length_ptr);
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extern VOID _CurrentEnv(struct RexxTask *task,struct Environment ** environment_ptr);
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extern struct Node * _FetchValue(struct Environment * env,struct NexxStr * stem,struct NexxStr * compound,struct Node *symbol_table_node,LONG * is_literal_ptr,struct NexxStr ** value_ptr);
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extern struct Node * _EnterSymbol(struct Environment * env,struct NexxStr * stem,struct NexxStr * compound);
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extern VOID _SetValue(struct Environment * env,struct NexxStr * value,struct Node * symbol_table_node);
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extern ULONG _StrcpyN(STRPTR destination,STRPTR source,LONG length);
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/****************************************************************************/
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/* Releases a string structure, if it's not owned at the time. */
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STATIC VOID
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FreeString(struct Environment * environment,struct NexxStr * ns)
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{
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/* Not currently owned? */
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if(!(ns->ns_Flags & NSF_KEEP))
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_FreeSpace(environment,ns,sizeof(*ns) + ns->ns_Length + 1); /* struct Environment * a0,APTR block a1,LONG d0 */
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}
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/****************************************************************************/
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/* Allocates and initializes a string structure. */
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STATIC struct NexxStr *
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MakeString(struct Environment * environment,STRPTR value,LONG length)
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{
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struct NexxStr * result = NULL;
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struct NexxStr * ns;
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/* Allocate memory for the NexxStr and the NUL-terminated string itself. */
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ns = _GetSpace(environment,sizeof(*ns) + length + 1); /* struct Environment * a0,LONG d0 : APTR d0 */
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if(ns == NULL)
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goto out;
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/* Fill in the NexxStr structure, copy the string and remember the hash value for it. */
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ns->ns_Length = length;
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ns->ns_Flags = NSF_STRING;
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ns->ns_Hash = _StrcpyN((STRPTR)ns->ns_Buff,value,length); /* STRPTR a0,STRPTR a1,LONG d0 : ULONG d0 */
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result = ns;
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out:
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return(result);
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}
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/****************************************************************************/
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/* Classifies a symbol and returns the stem and compound parts. */
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STATIC LONG
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TypeString(STRPTR variable_name,struct Environment * environment,struct NexxStr ** compound_ptr,struct NexxStr ** stem_ptr)
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{
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struct NexxStr * compound;
|
|
struct NexxStr * stem = NULL;
|
|
LONG error = ERR10_003; /* no memory available */
|
|
LONG stem_length;
|
|
LONG symbol_length;
|
|
STRPTR dot;
|
|
|
|
(*compound_ptr) = NULL;
|
|
(*stem_ptr) = NULL;
|
|
|
|
/* The 'compound' part is the entire variable name, including all dots and
|
|
what's in between them. */
|
|
compound = MakeString(environment,variable_name,strlen(variable_name));
|
|
if(compound == NULL)
|
|
goto out;
|
|
|
|
/* Find the first dot in the variable name. Everything in front of it
|
|
constitutes the 'stem' part. If there is no dot in the name, then
|
|
the 'compound' and 'stem' parts are identical. */
|
|
dot = memchr(compound->ns_Buff,'.',compound->ns_Length);
|
|
if(dot != NULL)
|
|
stem_length = ((char *)dot - (char *)compound->ns_Buff) + 1;
|
|
else
|
|
stem_length = compound->ns_Length;
|
|
|
|
/* Make a copy of the 'stem' part. */
|
|
stem = MakeString(environment,variable_name,stem_length);
|
|
if(stem == NULL)
|
|
goto out;
|
|
|
|
/* Figure out if this is a symbol after all. */
|
|
_IsSymbol((STRPTR)stem->ns_Buff,&symbol_length); /* STRPTR a0 : LONG d0, LONG d1 */
|
|
|
|
/* The entire name must match the stem part. */
|
|
if(symbol_length != stem->ns_Length)
|
|
{
|
|
error = ERR10_040; /* invalid variable name */
|
|
goto out;
|
|
}
|
|
|
|
(*compound_ptr) = compound;
|
|
(*stem_ptr) = stem;
|
|
|
|
error = 0;
|
|
|
|
out:
|
|
|
|
if(error != 0)
|
|
{
|
|
if(compound != NULL)
|
|
FreeString(environment,compound);
|
|
|
|
if(stem != NULL)
|
|
FreeString(environment,stem);
|
|
}
|
|
|
|
return(error);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
|
|
/* Retrieves the value of a variable from the current storage environment. */
|
|
LONG
|
|
GetRexxVar(struct RexxMsg *context,STRPTR variable_name,STRPTR * return_value)
|
|
{
|
|
struct Environment * environment;
|
|
struct NexxStr * ns;
|
|
struct NexxStr * compound_string;
|
|
struct NexxStr * stem_string;
|
|
LONG is_literal;
|
|
LONG error;
|
|
|
|
(*return_value) = NULL;
|
|
|
|
if(!CheckRexxMsg(context))
|
|
{
|
|
error = ERR10_010; /* invalid message packet */
|
|
goto out;
|
|
}
|
|
|
|
/* Find the current storage environment. */
|
|
_CurrentEnv(context->rm_TaskBlock,&environment); /* struct RexxTask * a0 : struct Environment * a0 */
|
|
|
|
/* Create the stem and component parts. */
|
|
error = TypeString(variable_name,environment,&compound_string,&stem_string);
|
|
if(error != 0)
|
|
goto out;
|
|
|
|
/* Look up the value. NOTE: _FetchValue() will free the two 'struct NexxStr *' provided. */
|
|
_FetchValue(environment,stem_string,compound_string,NULL,&is_literal,&ns); /* struct Environment * a0,struct NexxStr * a1,struct NexxStr * d0,struct Node * d1 : struct NexxStr * a0, LONG d1 */
|
|
|
|
/* If this is not a literal, return a pointer to the string. */
|
|
if(!is_literal)
|
|
(*return_value) = (STRPTR)ns->ns_Buff;
|
|
|
|
error = 0;
|
|
|
|
out:
|
|
|
|
return(error);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
|
|
/* Assigns a value to a variable in the current storage environment. */
|
|
LONG
|
|
SetRexxVar(struct RexxMsg *context,STRPTR variable_name,STRPTR value,LONG length)
|
|
{
|
|
struct Environment * environment;
|
|
struct NexxStr * compound_string;
|
|
struct NexxStr * stem_string;
|
|
struct Node * symbol_table_node;
|
|
struct NexxStr *value_string;
|
|
LONG error;
|
|
|
|
/* Make sure the value string is not too long */
|
|
if(length > 65535)
|
|
{
|
|
error = ERR10_009; /* symbol or string too long */
|
|
goto out;
|
|
}
|
|
|
|
if(!CheckRexxMsg(context))
|
|
{
|
|
error = ERR10_010; /* invalid message packet */
|
|
goto out;
|
|
}
|
|
|
|
/* Find the current storage environment. */
|
|
_CurrentEnv(context->rm_TaskBlock,&environment); /* struct RexxTask * a0 : struct Environment * a0 */
|
|
|
|
/* Create the stem and compound parts */
|
|
error = TypeString(variable_name,environment,&compound_string,&stem_string);
|
|
if(error != 0)
|
|
goto out;
|
|
|
|
/* Locate or create the symbol node. NOTE: _EnterSymbol() will put the two 'struct NexxStr *' into
|
|
the symbol table. It is not nececessary to free them. */
|
|
symbol_table_node = _EnterSymbol(environment,stem_string,compound_string); /* struct Environment a0, struct NexxStr *a1, struct NexxStr * d0 : struct Node * d0 */
|
|
if(symbol_table_node == NULL)
|
|
{
|
|
error = ERR10_003; /* no memory available */
|
|
goto out;
|
|
}
|
|
|
|
/* Create the value string. */
|
|
value_string = MakeString(environment,value,length);
|
|
if(value_string == NULL)
|
|
{
|
|
error = ERR10_003; /* no memory available */
|
|
goto out;
|
|
}
|
|
|
|
/* Install the value string. */
|
|
_SetValue(environment,value_string,symbol_table_node); /* struct Environment *a0, struct NexxStr *a1, struct Node * d0 */
|
|
|
|
error = 0;
|
|
|
|
out:
|
|
|
|
return(error);
|
|
}
|
|
|
|
/****************************************************************************/
|
|
|
|
#endif
|