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Digital-Research-Source-Code/ASSEMBLY & COMPILE TOOLS/PLM VAX COMPILER/plmudi/argument.plm
Sepp J Morris 31738079c4 Upload
Digital Research
2020-11-06 18:50:37 +01:00

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$TITLE ("UDI Procedures to Get Command Arguments")
$LARGE OPTIMIZE(3)
DQ_argument: do; /* UDI procedures to get command arguments. */
/*************************************************************************/
/* */
/* D I S C L A I M E R N O T I C E */
/* ------------------- ----------- */
/* */
/* This document and/or portions of the material and data furnished */
/* herewith, was developed under sponsorship of the U. S. Government. */
/* Neither the U.S. nor the U.S.D.O.E., nor the Leland Stanford Junior */
/* University, nor their employees, nor their respective contractors, */
/* subcontractors, or their employees, makes any warranty, express or */
/* implied, or assumes any liability or responsibility for accuracy, */
/* completeness or usefulness of any information, apparatus, product */
/* or process disclosed, or represents that its use will not infringe */
/* privately-owned rights. Mention of any product, its manufacturer, */
/* or suppliers shall not, nor is it intended to, imply approval, dis- */
/* approval, or fitness for any particular use. The U. S. and the */
/* University at all times retain the right to use and disseminate same */
/* for any purpose whatsoever. Such distribution shall be made by the */
/* National Energy Software Center at the Argonne National Laboratory */
/* and only subject to the distributee furnishing satisfactory proof */
/* that he has a valid license from the Intel Corporation in effect. */
/* */
/*-----------------------------------------------------------------------*/
/* */
/* R E V I S I O N H I S T O R Y */
/* */
/* 07JAN82 Alex Hunter 1. Changed default delimiter set to */
/* agree with Series III default. */
/* 2. Added DQ$SET$DELIMITERS procedure. */
/* 31JAN82 Alex Hunter 1. Added indirect command lines. */
/* 03FEB82 Alex Hunter 1. Changed module name. */
/* 05FEB82 Alex Hunter 1. Only allow @file from invocation line.*/
/* 07FEB82 Alex Hunter 1. Fix bug for zero-length indirect */
/* files. */
/* */
/*************************************************************************/
declare %PTR literally 'POINTER';
$INCLUDE (PLM$UDI:CUSTOMARY.LIT)
$INCLUDE (PLM$UDI:ASCII.LIT)
$INCLUDE (PLM$UDI:EXCEPT.LIT)
$INCLUDE (PLM$UDI:EXITCODES.LIT)
$INCLUDE (PLM$UDI:DESCRIPT.LIT)
/**************** EXTERNAL UDI ROUTINES ********************/
DECLARE CONNECTION literally 'WORD';
DQ$ATTACH: PROCEDURE (path$p,excep$p) CONNECTION EXTERNAL;
DECLARE (path$p,excep$p) POINTER;
END;
DQ$DETACH: PROCEDURE (conn,excep$p) EXTERNAL;
DECLARE conn CONNECTION, excep$p POINTER;
END;
DQ$EXIT: PROCEDURE (completion$code) EXTERNAL;
DECLARE completion$code WORD;
END;
DQ$OPEN: PROCEDURE (conn,access,num$buf,excep$p) EXTERNAL;
DECLARE conn CONNECTION, access BYTE, num$buf BYTE,
excep$p POINTER;
END;
DQ$READ: PROCEDURE (conn,buf$p,count,excep$p) WORD EXTERNAL;
DECLARE conn CONNECTION, buf$p POINTER, count WORD,
excep$p POINTER;
END;
/*********************************************/
declare CR literally 'ASC$CR', LF literally 'ASC$LF',
TAB literally 'ASC$HT';
LIB%GET_FOREIGN: procedure (tail$d,prompt$d,outlen$p) external;
declare (tail$d,prompt$d,outlen$p) pointer;
end;
common /command_tail/ tail (256) byte;
declare tail$desc descriptor
data (size(tail)-1,DSC$K_DTYPE_T,DSC$K_CLASS_S,@tail);
declare prompt (*) byte data ('$_Command_tail: ');
declare prompt$desc descriptor
data (size(prompt),DSC$K_DTYPE_T,DSC$K_CLASS_S,@prompt);
declare i word;
declare initialized byte initial(FALSE);
declare command$buf$p pointer;
declare (command based command$buf$p) (1) byte;
declare default$delimiter$set (*) byte data
(20, ',()=#!$%\~+-&|[]<>;', ASC$DEL);
declare current$delimiter$set$p pointer initial (@default$delimiter$set);
declare (current$delimiter$set based current$delimiter$set$p) (1) byte;
declare indirect$buffer (4097) byte;
declare indirect$file$name (81) byte;
declare parsing$indirect$file byte initial (FALSE);
declare parsing$invocation$line byte initial (FALSE);
$subtitle ("DQ$GET$ARGUMENT -- Get Command Argument")
DQ$GET$ARGUMENT: procedure (argument$p, excep$p) byte reentrant public;
declare (argument$p, excep$p) %PTR;
declare (argument based argument$p) structure (length byte,
arg(80) byte);
declare (status based excep$p) word;
declare quote byte;
declare terminator byte;
declare conn word;
declare local$status word;
declare buffer$length word;
declare count word;
declare index word;
delimiter: procedure byte;
if command(i) <= 20H or
FINDB(@current$delimiter$set(1),command(i),
current$delimiter$set(0)) <> 0FFFFH
then
return TRUE;
else
return FALSE;
end delimiter;
putc: procedure (char);
declare char byte;
if argument.length < 80 then do;
argument.arg(argument.length)=char;
argument.length=argument.length+1;
end;
else
status = E$STRING$BUF;
return;
end putc;
status = E$OK;
argument.length = 0;
if not initialized then do;
declare outlen word;
call LIB%GET_FOREIGN (@tail$desc,
@prompt$desc,@outlen);
tail(outlen)=CR;
command$buf$p = tail$desc.ptr;
i = 0;
initialized = TRUE;
parsing$invocation$line=TRUE;
end;
rescan:
do while command(i)=' ' or command(i)=tab; i=i+1; end;
if parsing$invocation$line and command(i)='@' then
do;
if parsing$indirect$file then
call DQ$EXIT(X$bad$indirect$syntax);
endif
i=i+1;
parsing$indirect$file=TRUE;
terminator=DQ$GET$ARGUMENT(@indirect$file$name,@local$status);
parsing$indirect$file=FALSE;
if terminator<>CR then
call DQ$EXIT(X$indirect$not$last);
endif
conn=DQ$ATTACH(@indirect$file$name,@local$status);
if local$status<>E$OK then
call DQ$EXIT(X$bad$indirect$file);
endif
call DQ$OPEN(conn,1,1,@local$status);
if local$status<>E$OK then
call DQ$EXIT(X$bad$indirect$file);
endif
buffer$length=0;
count=1;
do while count>0 and buffer$length<size(indirect$buffer);
count=DQ$READ(conn,@indirect$buffer(buffer$length),
size(indirect$buffer)-buffer$length,
@local$status);
if local$status<>E$OK then
call DQ$EXIT(X$bad$indirect$file);
endif
buffer$length=buffer$length+count;
enddo
if buffer$length>=size(indirect$buffer) then
call DQ$EXIT(X$indirect$too$long);
endif
call DQ$DETACH(conn,@local$status);
if local$status<>E$OK then
call DQ$EXIT(X$bad$indirect$file);
endif
do index=1 to buffer$length;
if indirect$buffer(index-1)=CR or
indirect$buffer(index-1)=LF then
indirect$buffer(index-1)=' ';
endif
enddo
indirect$buffer(buffer$length)=CR;
command$buf$p = @indirect$buffer;
i = 0;
go to rescan;
enddo
endif
if delimiter then do;
i=i+1;
return command(i-1);
end;
if command(i)='''' or command(i)='"' then do;
quote = command(i);
do while command(i)=quote;
i=i+1;
do while command(i)<>quote and command(i)<>CR;
call putc(command(i));
i=i+1;
end;
if command(i)<>CR then i=i+1;
if command(i)=quote then call putc(quote);
end;
end;
else do while not delimiter;
if command(i)>='a' and command(i)<='z' then
call putc(command(i)+('A'-'a'));
else
call putc(command(i));
i=i+1;
end;
do while command(i)=' ' or command(i)=tab; i=i+1; end;
if delimiter then do;
i=i+1;
return command(i-1);
end;
else
return ' ';
end DQ$GET$ARGUMENT;
$subtitle ("DQ$SWITCH$BUFFER -- Change Command Buffer")
DQ$SWITCH$BUFFER: procedure (buffer$p, excep$p) word public;
declare (buffer$p, excep$p) %PTR;
declare (status based excep$p) word;
declare OLD$I word;
command$buf$p = buffer$p;
OLD$I = i; i = 0;
initialized = TRUE;
parsing$invocation$line = FALSE;
status = E$OK;
return OLD$I;
end DQ$SWITCH$BUFFER;
$subtitle ("DQ$SET$DELIMITERS -- Change Delimiter Set")
DQ$SET$DELIMITERS: procedure (delimiter$set$p, excep$p) public;
declare (delimiter$set$p, excep$p) %PTR;
declare (status based excep$p) word;
if delimiter$set$p = 0 then
current$delimiter$set$p = @default$delimiter$set;
else
current$delimiter$set$p = delimiter$set$p;
status = E$OK;
end DQ$SET$DELIMITERS;
end DQ_argument;