Document revision date: 19 July 1999

Format

{integer|string} := GET_INFO (COMMAND_LINE,

{"character" |"character_set" |"command" |"command_file" |"create" |"display" |"file_name" |"first_file_name" |"initialization" |"initialization_file" |"init_file" |"journal" |"journal_file" |"line" |"modify" |"next_file_name" |"nomodify" |"output" |"output_file" |"read_only" |"recover" |"section" |"section_file" |"start_character" |"start_record" |"work" |"work_file" |"write"})

Parameters

"character"

Returns an integer that is the column number of the character position specified by the /START_POSITION qualifier. This parameter is useful in a procedure to determine where DECTPU should place the cursor at startup time. The default is 1 if you do not specify the qualifier or option. This parameter is the same as the "start_character" parameter.

"character_set"

Returns a keyword that indicates the character set that you specified by the /CHARACTER_SET qualifier. DECTPU can return the following keywords: DEC_MCS (default), ISO_LATIN1, and GENERAL.

"command"

Returns an integer (1 or 0) that indicates whether the /COMMAND qualifier is active (either by default or because the qualifier or option was specified when you invoked DECTPU).

"command_file"

Returns a string that is the command file specification from the /COMMAND qualifier.

"create"

Returns an integer (1 or 0) that indicates whether the /CREATE qualifier is active (either by default or because the qualifier was specified when you invoked DECTPU).

"display"

Returns an integer (1 or 0) that indicates whether the /DISPLAY or /INTERFACE qualifier is active (either by default or because /DISPLAY or /INTERFACE was specified when you invoked DECTPU).

"file_name"

Returns a string that is the first file specification used as a parameter when you invoke DECTPU. Returns a null string if you did not specify an input file name on the command line.

"first_file_name"

Returns a string that is the first file specification used as a parameter when you invoke DECTPU. Returns 0 if you did not specify any file name on the command line. There is a single input parameter that can be a list of comma-separated file specifications. This GET_INFO returns only the first file specification.

"initialization"

Returns an integer (1 or 0) that indicates whether the /INITIALIZATION qualifier is active (either by default or because the qualifier was specified when you invoked DECTPU).

"initialization_file"

Returns a string that is the initialization file specification for the /INITIALIZATION qualifier.

"init_file"

This is a synonym for GET_INFO (COMMAND_LINE, "initialization_file").

"journal"

Returns an integer (1 or 0) that indicates whether the /JOURNAL qualifier is active (either by default or because the qualifier was specified when you invoked DECTPU).

"journal_file"

Returns a string that is the journal file specification for the /JOURNAL qualifier.

"line"

Returns an integer that is the record number of the line specified by the /START_POSITION qualifier. This parameter is useful in a procedure to determine where DECTPU should place the cursor at startup time. The default is 1 if the qualifier or option is not specified. This parameter is the same as the "start_record" parameter.

"modify"

Returns an integer (1 or 0) that indicates whether the /MODIFY qualifier was specified when you invoked DECTPU.

"next_file_name"

Returns the next file name entered on the command line that invoked TPU. Returns 0 if no file name was specified on the command line, or if there are no more file names to return.

"nomodify"

Returns an integer (1 or 0) that indicates whether the /NOMODIFY qualifier was specified when you invoked DECTPU.

"output"

Returns an integer (1 or 0) that indicates whether the /OUTPUT qualifier is active (either by default or because the qualifier was specified when you invoked DECTPU).

"output_file"

Returns a string that is the output file specification for the /OUTPUT qualifier.

"read_only"

Returns an integer (1 or 0) that indicates whether the /READ_ONLY qualifier was specified when you invoked DECTPU.

"recover"

Returns an integer (1 or 0) that indicates whether the /RECOVER qualifier was specified when you invoked DECTPU.

"section"

Returns an integer (1 or 0) that indicates whether the /SECTION qualifier is active (either by default or because the qualifier was specified when you invoked DECTPU).

"section_file"

Returns a string that is the section file specification for the /SECTION qualifier.

"start_character"

Returns an integer that is the column number of the character position specified by the /START_POSITION qualifier. This parameter is useful in a procedure to determine where DECTPU should place the cursor at startup time. The default is 1 if you do not specify qualifier. This parameter is a synonym for "character".

"start_record"

Returns an integer that is the record number of the line specified by the /START_POSITION qualifier. This parameter is useful in a procedure to determine where DECTPU should place the cursor at startup time. The default is 1 if you do not specify the qualifier. This parameter is a synonym for "line".

"work"

Returns an integer (1 or 0) that indicates whether the /WORK qualifier is active (either by default or because the qualifier was specified when you invoked DECTPU).

"work_file"

Returns a string that is the work file specification for the /WORK qualifier.

"write"

Returns an integer (1 or 0) that indicates whether the /WRITE qualifier was specified when you invoked DECTPU.

Return Values

integer

Returns requested information about the integer you specify.

string

Returns requested information about the string you specify.

Description

The GET_INFO (COMMAND_LINE) procedure returns information about the command line used to invoke DECTPU.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO.

Format

{contents |integer |parameter |string |variable} := GET_INFO (DEBUG,

{"breakpoint" |"examine", variable_name |"line_number" |"local" |"next" |"parameter" |"previous" |"procedure"})

Parameters

"breakpoint"

Returns a string that is the name of the first breakpoint. This establishes a breakpoint context for the next and previous parameters. TPU$_NONAMES is returned if there are no breakpoints.

"examine", variable_name

Returns the contents of the specified variable. TPU$_NONAMES is returned if the specified variable cannot be found.

You must specify a string that contains the name of the variable as the third parameter to GET_INFO (DEBUG, "examine").

"line_number"

Returns an integer that is the line number of the breakpoint within the procedure. If the procedure is unnamed, 0 is returned.

"local"

Returns the first local variable in the procedure. This establishes a context for the next and previous parameters. TPU$_NONAMES is returned if there are no local variables.

"next"

Returns the next parameter, local variable, or breakpoint. Before using GET_INFO (DEBUG, "next"), you must use one of the following built-ins:

• GET_INFO (DEBUG, "local")
• GET_INFO (DEBUG, "breakpoint")
• GET_INFO (DEBUG, "parameter")

TPU$_NONAMES is returned if there are no more.

"parameter"

Returns the first parameter of the procedure. GET_INFO (DEBUG, "parameter") causes the DECTPU Debugger to construct a list of all the formal parameters of the procedure you are debugging. Once this list is constructed, you can use GET_INFO (DEBUG, "next") and GET_INFO (DEBUG, "previous"). DECTPU signals TPU$_NONAMES if the procedure you are debugging does not have any parameters.

"previous"

Returns the previous parameter, local variable, or breakpoint. TPU$_NONAMES is returned if there are no more.

"procedure"

Returns a string that is the name of the procedure containing the breakpoint. The null string is returned if the procedure has no name.

Return Values

contents

Returns requested information about the contents you specify.

integer

Returns requested information about the integer you specify.

parameter

Returns requested information about the parameter you specify.

string

Returns requested information about the string you specify.

variable

Returns requested information about the variable you specify.

Description

The GET_INFO (DEBUG) procedure returns information about the status of a debugging session when you are using the DECTPU Debugger.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO.

Format

keyword := GET_INFO (DEFINED_KEY, {"first" |"last" |"next" |"previous"} , string )

Parameters

"first"

Returns a keyword that is the key name of the first key in the specified key map or key map list.

"last"

Returns a keyword that is the key name of the last key in the specified key map or key map list.

"next"

Returns a keyword that is the key name of the next key in the specified key map or key map list. Returns 0 if last. Use "first" before "next".

"previous"

Returns a keyword that is the key name of the previous key in the specified key map or key map list. Returns 0 if first. Use "last" before "previous".

string

The string that specifies the name of either the key map or key map list to be searched.

Return Value

Description

The GET_INFO (DEFINED_KEY) procedure returns a keyword that is the key name of a specified key.

"Current" is not valid when the first parameter is DEFINED_KEY or KEY_MAP, although it is valid when the first parameter is KEY_MAP_LIST.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO.

Format

string := GET_INFO (integer, "name")

Parameters

integer

Returns an integer that is the equivalent of a DECTPU keyword. When you use GET_INFO (integer, "name"), the built-in returns the string representation of the keyword that is equivalent to the specified integer.

For example, the following statement assigns the string process to the variable equiv_string:

equiv_string := GET_INFO (10, "name");

(The value 10 is the integer equivalent of the PROCESS keyword.)

You should not use the integer equivalents of keywords in DECTPU code. DIGITAL does not guarantee that the existing equivalences between integers and keywords will always remain the same.

"name"

Returns the string equivalent of the specified integer or keyword.

Return Value

Description

The GET_INFO (integer_variable) procedure returns the string representation of any integer that is an equivalent of a keyword.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO. See also the description of GET_INFO (any_keyword).

Format

{integer|string} := GET_INFO (KEY_MAP, {"first" |"last" |"next" |"previous"}, name_string )

Parameters

"first"

Returns a string that is the name of the first key map in the key map list; returns 0 if there is none.

"last"

Returns a string that is the name of the last key map in the key map list; returns 0 if there is none.

"next"

Returns a string that is the name of the next key map in the key map list; returns 0 if there is none. Use "first" before "next".

"previous"

Returns a string that is the name of the previous key map in the key map list; returns 0 if there is none. Use "last" before "previous".

name_string

The string that specifies the name of either the key map or key map list to be searched.

Return Values

integer

Returns requested information about the integer you specify.

string

Returns requested information about the string you specify.

Description

The GET_INFO (KEY_MAP) procedure returns information about a key map in a specified key map list. GET_INFO (KEY_MAP) takes a string as a third parameter. The string specifies the name of the key map list to be searched.

The parameter "current" is not valid when the first keyword is DEFINED_KEY or KEY_MAP, although it is valid when the first keyword is KEY_MAP_LIST.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO.

Format

{integer|string} := GET_INFO (KEY_MAP_LIST, {"current" |"first" |"last" |"next" |"previous"})

Parameters

"current"

Returns a string that is the name of the current key map list; returns 0 if there is none.

"first"

Returns a string that is the name of the first key map list; returns 0 if there is none.

"last"

Returns a string that is the name of the last key map list; returns 0 if there is none.

"next"

Returns a string that is the name of the next key map list; returns 0 if there is none. Use "current" or "first" before "next".

"previous"

Returns a string that is the name of the previous key map list; returns 0 if there is none. Use "current" or "last" before "previous".

Return Values

integer

Returns requested information about the integer you specify.

string

Returns requested information about the string you specify.

Description

The GET_INFO (KEY_MAP_LIST) procedure returns information about a key map list.

The parameter "current" is not valid when the first keyword is DEFINED_KEY or KEY_MAP, although it is valid when the first keyword is KEY_MAP_LIST.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO.

Format

{buffer |integer |keyword} := GET_INFO (marker_variable,

{"before_bol" |"beyond_eob" |"beyond_eol" |"bound" |"buffer" |"display_value" |"left_margin" |"middle_of_tab" |"offset" |"offset_column" |"record_number" |"right_margin" |"unmodifiable_records" |"video" |"within_range", range})

Parameters

marker_variable

The marker for which the information is requested.

"before_bol"

Returns 1 if the specified marker is located before the beginning of a line; returns 0 if it is not.

"beyond_eob"

Returns 1 if the specified marker is located beyond the end of a buffer; returns 0 if it is not.

"beyond_eol"

Returns 1 if the specified marker is located beyond the end of a line; returns 0 if it is not.

"bound"

Returns 1 if the specified marker is attached to a character; returns 0 if the marker is free. For more information on bound and free markers, see the Guide to the DEC Text Processing Utility.

"buffer"

Returns the buffer in which the marker is located.

"display_value"

Returns the display value of the record in which the specified marker is located. For more information about display values, see the descriptions of the SET (DISPLAY_VALUE) and SET (RECORD_ATTRIBUTES) built-in procedures.

"left_margin"

Returns an integer that is the current left margin setting of the line containing the marker.

"middle_of_tab"

Returns an integer (1 or 0) that indicates whether the marker is located in the white space created by a tab.

"offset"

Returns an integer that is the number of characters between the left margin and the marker. The left margin is counted as character 0. A tab is counted as one character, regardless of width. Window shifts have no effect on the value returned when you use "offset". The value returned has no relation to the visible screen column in which the character bound to the marker is displayed.

"offset_column"

Returns an integer that is the screen column in which DECTPU displays the character to which the marker is bound. When calculating this value, DECTPU does not take window shifts into account; DECTPU assumes that any window mapped to the current buffer is not shifted. The value returned when you use "offset_column" does reflect the location of the left margin and the width of tabs preceding the editing point. In contrast, the value returned when you use "offset" is not affected by the location of the left margin or the width of tabs.

"record_number"

Returns an integer that is the number associated with the record (line) containing the specified marker.

A record number indicates the location of a record in a buffer. Record numbers are dynamic. As you add or delete records, DECTPU changes the number associated with a particular record, as appropriate. DECTPU counts each record in a buffer, regardless of whether the line is visible in a window or whether the record contains text. GET_INFO (marker, "record_number") counts the end-of-buffer text as a record if the specified marker is on the end-of-buffer text, but GET_INFO (buffer, "record_count") never counts the end-of-buffer text as a record. Thus, it is possible for the value returned by GET_INFO (buffer, "record_count") to be one less than the maximum value returned by GET_INFO (marker, "record_number").

"right_margin"

Returns an integer that is the current right margin setting of the line containing the marker.

"unmodifiable_records"

Returns 1 if the record that contains the specified marker is unmodifiable; returns 0 if the record is modifiable.

"video"

Returns a keyword that is the video attribute of the marker; returns 0 if the marker is a free marker.

"within_range"

Returns an integer (1 or 0) that indicates whether the marker is in the range specified by the third parameter.

Return Values

buffer

Returns requested information about the buffer you specify.

integer

Returns requested information about the integer you specify.

keyword

Returns requested information about the keyword you specify.

Description

The GET_INFO (marker_variable) procedure returns information about a specified marker.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO.

Format

{integer|window} := GET_INFO (mouse_event_keyword, {"mouse_button" |"window"})

Parameters

"mouse_button"

Returns an integer that is the number of the mouse button specified with a mouse event keyword.

Table 2-4 lists the valid keywords for the first parameter when you use "mouse_button" as the second parameter.

Table 2-4 DECTPU Keywords Representing Mouse Events

M1UP	M2UP	M3UP	M4UP	M5UP
M1DOWN	M2DOWN	M3DOWN	M4DOWN	M5DOWN
M1DRAG	M2DRAG	M3DRAG	M4DRAG	M5DRAG
M1CLICK	M2CLICK	M3CLICK	M4CLICK	M5CLICK
M1CLICK2	M2CLICK2	M3CLICK2	M4CLICK2	M5CLICK2
M1CLICK3	M2CLICK3	M3CLICK3	M4CLICK3	M5CLICK3
M1CLICK4	M2CLICK4	M3CLICK4	M4CLICK4	M5CLICK4
M1CLICK5	M2CLICK5	M3CLICK5	M4CLICK5	M5CLICK5

"window"

Returns the window in which the downstroke occurred that started the current drag operation. Returns 0 if no drag operation is in progress for the specified mouse button when the built-in is executed.

The valid keywords for the first parameter when you use "window" as the second parameter are M1DOWN, M2DOWN, M3DOWN, M4DOWN, and M5DOWN.

Return Values

integer

Returns requested information about the integer you specify.

window

Returns requested information about the window you specify.

Description

The GET_INFO (mouse_event_keyword) procedure returns information about a mouse event. A mouse_event_keyword is a keyword that represents a single click, multiple clicks, upstroke, downstroke, or drag of a mouse button.

For general information about using all forms of GET_INFO built-in procedures, see the description of GET_INFO.

Examples

In the following example, the statement causes DECTPU to assign the value 3 to the variable x:

x := GET_INFO (M3CLICK2, "mouse_button"); 
 
      

In the following example, when bound to M1DRAG, that procedure is called by DECTPU to respond to a drag event by checking whether you have dragged the mouse across window boundaries; if you have, the procedure displays a message. If not, the procedure outputs a message that you are dragging the mouse.

PROCEDURE sample_m1_drag 
 
LOCAL the_window, 
      new_window, 
      column, 
      row, 
      temp; 
 
the_window := GET_INFO (M1DOWN, "window"); 
IF the_window = 0 
THEN 
    RETURN (FALSE) 
ENDIF; 
 
LOCATE_MOUSE (new_window, column, row); 
 
IF the_window <> new_window 
THEN 
    MESSAGE ("Invalid drag of pointer across window boundaries."); 
ENDIF; 
MESSAGE ("Dragging the mouse..."); 
ENDPROCEDURE; 
      

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