* ========================== * amiga.dev/programs #11, from cscheppner, 10335 chars, Tue Feb 24 17:40:06 1987 * -------------------------- * TITLE: Astartup.asm --- with 1.2 fixes, handles quotes better ************************************************************************ * * Astartup.asm --- C Program Startup/Exit (CLI and WorkBench) * * Modified from the following source by cscheppner * (commented out non-functional ToolWindow code) ************************************************************************ * * * * Source Control: * -------------- * * $Header: startup.asm,v 1.1 86/08/25 12:50:07 root Exp $ * * $Locker: root $ * * $Log: startup.asm,v $ * Revision 1.1 86/08/25 12:50:07 root * Initial revision * * Revision 33.6 86/06/12 10:34:36 neil * changed so any version of dos is OK * * Revision 33.5 86/06/11 19:03:47 neil * fixed CloseLibrary if open of dos failed * * Revision 33.4 86/06/09 16:48:59 neil * now processes escapes also * * Revision 33.3 86/06/09 16:18:12 neil * another checkpoint -- quoted strings now work * * Revision 1.1 85/11/23 13:49:01 neil * Initial revision * * ************************************************************************ ******* Included Files ************************************************* INCLUDE "exec/types.i" INCLUDE "exec/alerts.i" INCLUDE "exec/nodes.i" INCLUDE "exec/lists.i" INCLUDE "exec/ports.i" INCLUDE "exec/libraries.i" INCLUDE "exec/tasks.i" INCLUDE "libraries/dos.i" INCLUDE "libraries/dosextens.i" INCLUDE "workbench/startup.i" ******* Imported ******************************************************* xlib macro xref _LVO\1 endm xref _AbsExecBase xref _Input xref _Output xref _main ; C code entry point xlib Alert xlib FindTask xlib Forbid xlib GetMsg xlib OpenLibrary xlib CloseLibrary xlib ReplyMsg xlib Wait xlib WaitPort xlib CurrentDir xlib Open xlib Close ******* Exported ******************************************************* xdef _SysBase xdef _DOSBase xdef _errno xdef _stdin xdef _stdout xdef _stderr xdef _exit ; standard C exit function xdef _WBenchMsg callsys macro CALLLIB _LVO\1 endm ************************************************************************ * * Standard Program Entry Point * ************************************************************************ * * main (argc, argv) * int argc; * char *argv[]; * ************************************************************************ startup: ; reference for Wack users move.l sp,initialSP ; initial task stack pointer move.l d0,dosCmdLen move.l a0,dosCmdBuf ;------ get Exec's library base pointer: move.l _AbsExecBase,a6 move.l a6,_SysBase ;------ get the address of our task suba.l a1,a1 callsys FindTask move.l d0,a4 ;------ are we running as a son of Workbench? tst.l pr_CLI(A4) beq fromWorkbench ;======================================================================= ;====== CLI Startup Code =============================================== ;======================================================================= fromCLI: ;------ attempt to open DOS library: bsr openDOS ;------ find command name: suba.l a0,a0 move.l pr_CLI(a4),d0 lsl.l #2,d0 ; bcpl pointer conversion move.l cli_CommandName(a0,d0.l),d0 lsl.l #2,d0 ; bcpl pointer conversion ;------ create buffer and array: movem.l a2/a3,-(sp) lea argvBuffer,a2 lea argvArray,a3 ;------ fetch command name: move.l d0,a0 moveq.l #0,d0 move.b (a0)+,d0 ; size of command name clr.b 0(a0,d0.l) ; terminate the string move.l a0,(a3)+ ;------ collect parameters: move.l dosCmdLen,d0 move.l dosCmdBuf,a0 ;------ null terminate the string, eat trailing garbage lea 0(a0,d0.l),a1 stripjunk: cmp.b #' ',-(a1) ;-- jimm: 8/25/86: per kodiak's recommendation ; bls.s stripjunk dbhi D0,stripjunk clr.b 1(a1) newarg: ;------ skip spaces move.b (a0)+,d1 beq.s parmExit cmp.b #' ',d1 beq.s newarg cmp.b #9,d1 ; tab beq.s newarg ;------ push address of the next parameter move.l a2,(a3)+ ;------ process quotes cmp.b #'"',d1 beq.s doquote ;------ copy the parameter in move.b d1,(a2)+ nextchar: ;------ null termination check move.b (a0)+,d1 beq.s parmExit cmp.b #' ',d1 beq.s endarg move.b d1,(a2)+ bra.s nextchar endarg: clr.b (a2)+ bra.s newarg doquote: ;------ process quoted strings move.b (a0)+,d1 beq.s parmExit cmp.b #'"',d1 beq.s endarg ;------ '*' is the BCPL escape character cmp.b #'*',d1 bne.s addquotechar move.b (a0)+,d1 cmp.b #'N',d1 beq.s 1$ cmp.b #'n',d1 bne.s 2$ 1$: ;------ got a *N -- turn into a newline moveq #10,d1 bra.s addquotechar 2$: cmp.b #'E',d1 beq.s 3$ cmp.b #'e',d1 bne.s addquotechar 3$: ;------ got a *E -- turn into a escape moveq #27,d1 addquotechar: move.b d1,(a2)+ bra.s doquote parmExit: ;------ all done -- null terminate the baby clr.b (a2) clr.l (a3) ;------ compute the # of arguments move.l #dosCmdBuf,d0 sub.l a3,d0 not.l d0 lsr.l #2,d0 movem.l (sp)+,a2/a3 pea argvArray move.l d0,-(sp) * * The above code relies on the end of line containing a control * character of any type, i.e. a valid character must not be the * last. This fact is ensured by DOS. * ;------ get standard input handle: jsr _Input move.l d0,_stdin ;------ get standard output handle: jsr _Output move.l d0,_stdout move.l d0,_stderr ;------ call C main entry point jsr _main ;------ return success code: moveq.l #0,D0 move.l initialSP,sp ; restore stack ptr rts ;======================================================================= ;====== Workbench Startup Code ========================================= ;======================================================================= fromWorkbench: ;------ open the DOS library: bsr openDOS ;------ we are now set up. wait for a message from our starter bsr waitmsg ;------ save the message so we can return it later move.l d0,_WBenchMsg ;------ push the message on the stack for wbmain move.l d0,-(SP) clr.l -(SP) indicate: run from Workbench ;------ get the first argument move.l d0,a2 move.l sm_ArgList(a2),d0 beq.s docons ;------ and set the current directory to the same directory move.l _DOSBase,a6 move.l d0,a0 move.l wa_Lock(a0),d1 callsys CurrentDir docons: * Note: This code commented out for 2 reasons. WorkBench never passes * the ToolWindow ptr in the WBenchMsg, and there is no matching * cleanup for this code. cs * ;------ get the toolwindow argument * move.l sm_ToolWindow(A2),d1 * beq.s domain * ;------ open up the file * move.l #MODE_OLDFILE,d2 * callsys Open * ;------ set the C input and output descriptors * move.l d0,_stdin * move.l d0,_stdout * move.l d0,_stderr * beq.s domain * ;------ set the console task (so Open( "*", mode ) will work * ; waitmsg has left the task pointer in A4 for us * lsl.l #2,d0 * move.l d0,a0 * move.l fh_Type(a0),pr_ConsoleTask(A4) domain: jsr _main moveq.l #0,d0 Successful return code bra.s exit2 ************************************************************************ * * C Program Exit Function * ************************************************************************ * * Warning: this function really needs to do more than this. * ************************************************************************ _exit: move.l 4(SP),d0 ; extract return code exit2: move.l initialSP,SP ; restore stack pointer move.l d0,-(SP) ; save return code ;------ close DOS library: move.l _AbsExecBase,A6 move.l _DOSBase,d0 beq.s 1$ move.l d0,a1 callsys CloseLibrary 1$: ;------ if we ran from CLI, skip workbench cleanup: tst.l _WBenchMsg beq.s exitToDOS ;------ return the startup message to our parent ;------ we forbid so workbench can't UnLoadSeg() us ;------ before we are done: callsys Forbid move.l _WBenchMsg,a1 callsys ReplyMsg ;------ this rts sends us back to DOS: exitToDOS: move.l (SP)+,d0 rts ;----------------------------------------------------------------------- noDOS: ALERT (AG_OpenLib!AO_DOSLib) moveq.l #100,d0 bra.s exit2 ;----------------------------------------------------------------------- ; This routine gets the message that workbench will send to us ; called with task id in A4 waitmsg: lea pr_MsgPort(A4),a0 * our process base callsys WaitPort lea pr_MsgPort(A4),a0 * our process base callsys GetMsg rts ;----------------------------------------------------------------------- ; Open the DOS library: openDOS lea DOSName(pc),A1 moveq #0,d0 callsys OpenLibrary move.l D0,_DOSBase beq noDOS rts DOSName DOSNAME ************************************************************************ DATA ************************************************************************ VerRev dc.w 33,1 _SysBase dc.l 0 _DOSBase dc.l 0 _errno dc.l 0 _stdin dc.l -1 _stdout dc.l -1 _stderr dc.l -1 initialSP dc.l 0 _WBenchMsg dc.l 0 dosCmdLen dc.l 0 dosCmdBuf dc.l 0 argvArray ds.l 32 argvBuffer ds.b 256