*-----------------------* * Reference : Functions * Sat Sep 28 17:23:04 1991 *-----------------------* ============================== Introduction ================================== This reference file contains all functions. Commands are not in this file. Note that you can use these functions from ARexx. Simply use the same format for normal commands : A function call in PowerVisor : res=if(a>b,1,2) How you must do this in ARexx : 'if a>b 1 2' res=result ================================= isbreak ==================================== = ISBREAK(
) Test if there is a ¹breakpoint in the ³current debug task on
. If true this function returns the ²breakpoint number and the ²breakpoint type in one longword, else it returns 0. has the following format : NNNNTTTT with NNNN a word containing the breakpoint number and TTTT containing the breakpoint type The following types are supported : 'T' ²temporary breakpoint 'N' ²normal breakpoint 'P' ²profile breakpoint 'C' ²conditional breakpoint 'A' ²after breakpoint (timeout) 's' breakpoint used to skip a BSR or JSR (private breakpoint) Related commands: debug break trace Related functions: getdebug toppc botpc Related lists: dbug Related tutor file: Debug ================================ geterror ==================================== = GETERROR( ) ³Evaluate an expression and ³return the error. If there was no error, 0 is returned. Example : < disp geterror(7) > 00000000 , 0 0 since 7 is a valid expression. < disp geterror(7+) > 00000010 , 16 returns 16 since there is a missing operand. The following errors are defined (Note ! Some of these are obsolete and will never appear) (Note ! you can change the errorstrings since this file is located in ¹s:PowerVisor-errors) : -6 Stack overflow !!! -5 A program has crashed !!! -4 A stack overflow was getting close ! -3 Quiting PowerVisor ! -2 PowerVisor has crashed ! -1 Break... 0 No error 1 Not enough memory ! 2 Syntax Error ! 3 This is not a device created with OpenDev ! 4 Bad list element type ! 5 Variable is a constant ! 6 Only yte, ord or ong ! 7 Odd address error ! 8 Could not Lock! 9 Bracket '(' expected ! 10 To many arguments for library function ! 11 Missing operand ! 12 Lock is not a subdirectory ! 13 Error while opening device ! 14 Unknown list element ! 15 Not implemented yet ! 16 Unknown mode argument ! 17 Unknown AddFunc argument ! 18 This is not a process ! 19 Node is not a task or process ! 20 This task is not freezed ! 21 This task is already freezed ! 22 Node type is wrong ! 23 Addressed element not found ! 24 Window is not sizeable ! 25 This is no supported library function ! 26 No help available for this subject ! 27 Error while opening file ! 28 Error while reading file ! 29 Not a resident module ! 30 Not a lock ! 31 Bad History value (2..1000) 32 Error opening trackdisk device ! 33 DoIO returned with a non zero value ! 34 There is no task to debug ! 35 Unknown argument for trace ! 36 Unknown argument for debug ! 37 Address is in ROM ! Can't set breakpoint ! 38 Not a debug node ! 39 Bad '@' argument 40 LoadSeg error ! 41 Unknown argument for dmode ! 42 There is no current debug task ! 43 Unknown argument for break ! 44 Breakpoint does not exist ! 45 There are no symbol hunks ! 46 Symbol not found ! 47 You can only remove variables ! 48 You can not assign to a function ! 49 You must use brackets with functions ! 50 Unknown argument for symbol ! 51 There are no symbols ! 52 You can only realloc blocks smaller than 64K ! 53 Your brackets are really out of order ! 54 The debug task is busy, please try again later ! 55 The task is not tracing ! 56 File does not have the right format ! 57 This is not a structure definition ! 58 Bad argument value ! 59 No colorchange allowed when PowerVisor is on a window ! 60 Could not open font ! 61 Can't execute script file in script file ! 62 Refresh window is not open ! 63 Unknown tag type ! 64 No output allowed on debug logical window ! 65 Error writing file ! 66 Not a Tag file ! 67 Bad tag list value (0 .. 15) ! 68 Unknown or invalid register ! 69 There is a more recent patch then this one installed ! 70 There is no fd file loaded for this library ! 71 Unknown logical window ! 72 Resulting commandline too long after converting from alias string ! 73 Missing left bracket '(' in fd file ! 74 Missing right bracket ')' in fd file ! 75 Bad '##bias' statement in fd file ! 76 You can't close the 'Main' physical window ! 77 You can't close the 'Main' logical window ! 78 Bad argument for 'openlw' ! Arg must be one of 'r','l','d' or 'u' ! 79 Brother logical window must be on same physical window ! 80 Window is not movable ! 81 There is no father for this box ! 82 Unknown preferences argument ! 83 Please close visitor windows first ! 84 Divide by zero ! 85 No group operators allowed for the debug task ! 86 Error opening screen ! 87 You can't remove the 'rc' and 'error' variables. These are private ! 88 'LoadSeg' failed ! 89 Variable names must start with a letter or an underscore ! 90 Error opening physical window ! 91 Error opening logical window ! 92 Bracket ')' expected ! 93 Bracket '}' expected ! 94 Bus error ! 95 Address error ! 96 Illegal instruction ! 97 Division by zero ! 98 CHK instruction ! 99 TRAPV instruction ! 100 Privilege Violation ! 101 Trace error ! 102 Unimplemented 1010 opcode ! 103 Unimplemented 1111 opcode ! Related commands: error Related tutor files: TheWizardCorner ================================ getstack ==================================== = GETSTACK( ) This function shows the maximum stack usage for the last task monitored with the 'stack' command. Related commands: stack ================================= getcol ===================================== = GETCOL( ) Get the real ³number of columns (or -1) for the ²logical window. Note that this is not always equal to the visible number of columns. If is not equal to -1 it is the total number of columns. If is equal to -1 it means that the logical window is ¹autoscalable in horizontal direction. To get the real number of columns (after scaling) you can use the 'cols' function. 'getcol' uses ¹autodefault to the 'lwin' list for the first argument. Related commands: colrow fit Related functions: getrow cols lines getlwin getx gety Related lists: lwin Related tutor files: Screen ================================= getrow ===================================== = GETROW( ) Get the real ³number of rows (or -1) for the ²logical window. See the explanation for 'getcol' to see what the -1 really means. 'getrow' uses ¹autodefault to the 'lwin' list for the first argument. Related commands: colrow fit Related functions: getcol cols lines getlwin getx gety Related lists: lwin Related tutor files: Screen ================================== eval ====================================== = EVAL( ) Evaluate the string at and return the result. 'eval' returns 0 if is 0. Example : < disp eval("1+2") > 00000003 , 3 < scan ????< 4+4 < disp eval(input) > 00000008 , 8 Related commands: disp void Related functions: if Related tutor files: Expressions =================================== if ======================================= = IF( ,, ) If is true, evaluate , else evaluate . Example : < d if(1,2,3) > 00000002 , 2 < d if(0,2,3) > 00000003 , 3 < a=1 < b=2 < c=3 < d=4 < e=5 < d if(a,if(b,c,d),e) > 00000003 , 3 < void if(a==1,{help functions},{help commands}) > ... Related commands: disp void Related functions: eval Related tutor files: Expressions ================================= taglist ==================================== = TAGLIST( ) Return the ³current tag list. This is a number between 0 and 15. You can change the current tag list with the 'usetag' or 'tg' commands. Related commands: usetag tg Related tutor files: LookingAtThings ================================== peek ====================================== = PEEK( ,, ) Returns the value of .. must be a pointer to a previously loaded ²structure definition. is the pointer to the ¹structure itself. must be defined in the structure definition. 'peek' uses ¹autodefault to the 'stru' list for the second argument. Related commands: addstruct interprete Related functions: apeek stsize Related lists: stru Related tutor files: LookingAtThings ================================= stsize ===================================== = STSIZE( ) Return the size of the ¹structure represented by . must be a ²structure definition loaded with 'addstruct'. 'stsize' uses ¹autodefault to the 'stru' list for the first argument. Related commands: addstruct interprete Related functions: peek apeek Related lists: stru Related tutor files: LookingAtThings ================================== apeek =====================================
= APEEK( ,, ) Returns the address of .. must be a pointer to a previously loaded ²structure definition. is the pointer to the ¹structure itself. must be defined in the structure definition. 'apeek' uses ¹autodefault to the 'stru' list for the second argument. Related commands: addstruct interprete Related functions: peek stsize Related lists: stru Related tutor files: LookingAtThings ================================== lines ===================================== = LINES( ) This function returns the maximum ³number of lines available on the ²logical window. 'lines' uses ¹autodefault to the 'lwin' list for the first argument. Example : < disp lines(main) > 00000033 , 51 Related commands: colrow fit Related functions: cols getcols getrows getlwin getx gety Related lists: lwin Related tutor files: Screen ================================== cols ====================================== = COLS( ) This function returns the maximum ³number of columns available on the ²logical window. 'cols' uses ¹autodefault to the 'lwin' list for the first argument. Example : < disp cols(main) > 00000056 , 86 Related commands: colrow fit Related functions: lines getcols getrows getlwin getx gety Related lists: lwin Related tutor files: Screen ================================= getlwin ==================================== = GETLWIN( ) This function returns a pointer to the ³current logical window. The current logical window is not the same as the ³active logical window. The current logical window is the one that shows all output. The active logical window is the one where you can ¹scroll with the keyboard. Related commands: current on active Related functions: getactive Related lists: lwin Related tutor files: Screen ================================ getactive =================================== = GETACTIVE( ) This function returns a pointer to the ³active logical window. This is the logical window where you can ¹scroll with the keyboard. You can change the active logical window with the 'active' command or with the ² key. Related commands: active on current Related functions: getlwin Related lists: lwin Related tutor files: Screen ================================== getx ====================================== = GETX( ) Get the current x ¹coordinate on the ³current logical window (in columns). Related commands: locate home cls current Related functions: gety getcols getrows cols lines getlwin getchar Related lists: lwin Related tutor files: Screen ================================== gety ====================================== = GETY( ) Get the current y ¹coordinate on the ³current logical window (in lines). Related commands: locate home cls current Related functions: getx getcols getrows cols lines getlwin getchar Related lists: lwin Related tutor files: Screen ================================= getchar ==================================== = GETCHAR( ) Get the ¹character at the ²current screenposition in the ³current logical window. Example : < {locate 10,10;a=getchar()} Related commands: locate home cls current Related functions: getx gety getcols getrows cols lines getlwin Related lists: lwin Related tutor files: Screen ================================= lastmem ==================================== = LASTMEM( ) This function returns the address that 'memory', 'view' and 'unasm' will use to ³continue their listing. Related commands: memory view unasm Related functions: lastfound lastbytes lastlines Related tutor files: LookingAtThings ================================ lastbytes =================================== = LASTBYTES( ) This function returns the last number of bytes used by 'memory' or 'view' (320 by default). Related commands: memory view Related functions: lastmem lastlines Related tutor files: LookingAtThings ================================ lastlines =================================== = LASTLINES( ) This function returns the last number of lines used by 'unasm' (20 by default). Related commands: unasm Related functions: lastmem lastbytes Related tutor files: LookingAtThings ================================ lastfound =================================== = LASTFOUND( ) This function returns the address of the second byte of the string found with 'search' or 'next'. This is the address where 'next' will continue with the search. Related commands: search next Related functions: lastmem ================================== alloc ===================================== = ALLOC( ('n',) | ('c',) | ('s',) ) Use this function for easy ²memory allocation. Use the 'free' function to free this memory, use the 'getsize' function to get the size of this memory and use the 'realloc' function to ¹reallocate the memory. The memory allocated with this function is guaranteed to contain only 0 (except if the first argument is equal to 's'). Note that memory allocated with this command is automatically freed when PowerVisor quits. When the blocksize is smaller than 65533 bytes the result from this function is a pointer after a word containing the size. This pointer is thus word alligned but not longword alligned. When the blocksize is bigger the result is a pointer after a longword containing the size. This pointer is longword alligned. Using word or longword allignment you can determine the size of a memory block. An easier way to do this is to use the 'getsize' function. Example : To allocate 1000 bytes : < a=alloc(n,1000) To allocate 11 bytes and copy the string 'PowerVisor' to this memory use : < a=alloc(s,'PowerVisor') To allocate 1000 bytes in chip ram use : < a=alloc(c,1000) Related commands: cleanup showalloc Related functions: free realloc getsize isalloc ================================= realloc ==================================== = REALLOC( , ) Use this function to ¹reallocate a ¹memoryblock allocated with the 'alloc' function. Only memoryblocks smaller than 64K are supported. Related commands: cleanup showalloc Related functions: alloc free getsize isalloc ================================== free ====================================== FREE( ) Free a block previously allocated with 'alloc'. Note that all memory allocated with 'alloc' is automatically freed when PowerVisor quits or when you use 'cleanup'. Related commands: cleanup showalloc Related functions: alloc realloc getsize isalloc ================================= getsize ==================================== = GETSIZE( ) This function determines the size of a ¹memoryblock allocated with the 'alloc' function or some other PowerVisor commands. Related commands: cleanup showalloc Related functions: alloc free isalloc realloc ================================= isalloc ==================================== = ISALLOC( ) This function checks if points to a ¹memoryblock allocated with the 'alloc' function. If it is, 'isalloc' returns a pointer to the pointer, otherwise 0. Related commands: cleanup showalloc Related functions: alloc free realloc getsize ================================= rfrate ===================================== = RFRATE( ) Return the current ²refresh rate installed with the 'refresh' command. Related commands: refresh rwin Related functions: rfcmd ================================== rfcmd ===================================== = RFCMD( ) Return a pointer to the current ²refresh command (or 0). This function returns a string if used from ¹ARexx. Related commands: refresh rwin Related functions: rfrate ================================= curlist ==================================== = CURLIST( ) Return a pointer to the name of the ²current list. This function returns a string if used from ¹ARexx. Note for experienced users only ! The pointer to the string is actually a pointer into the infoblock for the current list. curlist()-24 points to the start of the infoblock. See 'TheWizardCorner' for more information about infoblocks (in the 'info base'). Note that if you want to use this feature in ARexx you have to call this function using 'void' or 'assign'. If you call it directly you will get a string and not a pointer in ARexx Related tutor files: GettingStarted TheWizardCorner =================================== key ====================================== = KEY( ) Wait for a key and return the ²ascii value. This is especially useful in ¹scripts. Related commands: scan request Related functions: qual ================================== qual ====================================== = QUAL( ) Return the ¹qualifier for the ³last pressed key (with 'key'). Example : < a=key() < disp qual() Related commands: scan Related functions: key ================================== toppc ===================================== = TOPPC( ) This function returns the ²program counter visible at the top of the ³'Debug' logical window. You can set this program counter using the 'dstart' or 'dscroll' commands. Related commands: debug dwin dscroll dstart Related functions: botpc isbreak getdebug Related lists: dbug Related tutor files: Debug ================================== botpc ===================================== = BOTPC( ) This function returns the ²program counter visible at the bottom of the ³'Debug' logical window. You can set this program counter using the 'dstart' or 'dscroll' commands. Related commands: debug dwin dscroll dstart Related functions: toppc isbreak getdebug Related lists: dbug Related tutor files: Debug ================================ getdebug ==================================== = GETDEBUG( ) Return the ³current debug node. You can set the current debug node with 'duse' and 'with'. Related commands: duse with debug Related functions: isbreak toppc botpc Related lists: dbug Related tutor files: Debug ================================== base ====================================== = BASE( ) This function returns the pointer to the ²first element in the ²current list. Example : Go to the task list : < task < list > Task node name : Node Pri StackPtr StackS Stat Command Acc > --------------------------------------------------------------------------- > RAM : 00C20C68 00 00C2117A 1200 Rdy PROC - > golem.device : 00C05C8A 05 00C064B6 2048 Wait TASK - > NEWCON : 00C2CAA8 05 00C2DAA2 4000 Wait PROC - > ARP Shell Process : 00C26180 00 00C270F2 4000 Wait (03) - > PowerVisor1.0.task : 00C31C28 00 00C76132 1024 Wait TASK - > File System : 00C16758 0A 00C16AF6 840 Wait PROC - > File System : 00C172E8 0A 00C17686 840 Wait PROC - > trackdisk.device : 00C068DE 05 00C09F2E 512 Wait TASK - > trackdisk.device : 00C17846 05 00C17A5E 512 Wait TASK - > DH0 : 00C0DF08 0A 00C0E356 1000 Wait PROC - > input.device : 00C03BFA 14 00C04C00 4096 Wait TASK - > ARP Background She : 00C66EB8 00 00C75CD2 4000 Run pv (01) - < d base() > 00C20C68 , 12717160 Related commands: list