Built-in functions

Table 1. Built-in functions
Function	Description
`arg_val( index INTEGER ) RETURNS STRING`	Returns a command line argument by position.
`arr_count() RETURNS INTEGER`	Returns the number of rows entered during an `INPUT ARRAY` statement.
`arr_curr() RETURNS INTEGER`	Returns the current row in a `DISPLAY ARRAY` or `INPUT ARRAY`.
`downshift( s STRING ) RETURNS STRING`	Converts a string to lowercase.
`err_get( messageId INTEGER ) RETURNS STRING`	Returns the text corresponding to an error number.
`err_print( messageId INTEGER )`	Prints in the error line the text corresponding to an error number.
`err_quit( messageId INTEGER )`	Prints in the error line the text corresponding to an error number and terminates the program.
`errorlog( message STRING )`	Copies the string passed as parameter into the error log file.
`fgl_buffertouched() RETURNS INTEGER`	Returns `TRUE` if the input buffer was modified in the current field.
`fgl_db_driver_type() RETURNS CHAR(3)`	Returns the 3-letter identifier/code of the current database driver.
`fgl_decimal_truncate( x DECIMAL, scale INTEGER ) RETURNS DECIMAL`	Returns a decimal truncated to the precision passed as parameter.
`fgl_decimal_sqrt( x DECIMAL ) RETURNS DECIMAL`	Computes the square root of the decimal passed as parameter.
`fgl_decimal_exp( x DECIMAL ) RETURNS DECIMAL`	Returns the value of Euler's constant (e) raised to the power of the decimal passed as parameter.
`fgl_decimal_logn( x DECIMAL ) RETURNS DECIMAL`	Returns the natural logarithm of the decimal passed as parameter.
`fgl_decimal_power( x DECIMAL, y DECIMAL ) RETURNS DECIMAL`	Raises decimal to the power of the real exponent.
`fgl_dialog_getbuffer() RETURNS STRING`	Returns the text of the input buffer of the current field.
`fgl_dialog_getbufferlength() RETURNS INTEGER`	Returns the number of rows to feed a paged DISPLAY ARRAY.
`fgl_dialog_getbufferstart() RETURNS INTEGER`	Returns the row offset of the page to feed a paged display array.
`fgl_dialog_getcursor() RETURNS INTEGER`	Returns the position of the edit cursor in the current field.
`fgl_dialog_getfieldname() RETURNS STRING`	Returns the name of the current input field.
`fgl_dialog_getkeylabel( keyName STRING ) RETURNS STRING`	Returns the label associated to a key for the current interactive instruction.
`fgl_dialog_getselectionend() RETURNS INTEGER`	Returns the position of the last selected character in the current field.
`fgl_dialog_infield( name STRING ) RETURNS INTEGER`	This function checks for the current input field.
`fgl_dialog_setbuffer( value STRING )`	Sets the input buffer of the current field.
`fgl_dialog_setcurrline( screenLine INTEGER, row INTEGER )`	This function moves to a specific row in a record list.
`fgl_dialog_setcursor( x INTEGER )`	This function sets the position of the edit cursor in the current field.
`fgl_dialog_setfieldorder( constrainded INTEGER )`	This function enables or disables field order constraint.
`fgl_dialog_setkeylabel( keyName STRING, text STRING )`	Sets the label associated to a key for the current interactive instruction.
`fgl_dialog_setselection( start INTEGER, end INTEGER )`	Selects the text in the current field.
`fgl_drawbox( height INTEGER, width INTEGER, posY INTEGER, posX INTEGER, color INTEGER )`	Draws a rectangle in the current window.
`fgl_drawline( posY INTEGER, posX INTEGER, width INTEGER, type CHAR(1), color INTEGER)`	Draws a line in the current window (TUI and traditional mode).
`fgl_eventloop() RETURNS BOOLEAN`	Waits for a user interaction event.
`fgl_getenv( name STRING ) RETURNS STRING`	Returns the value of the environment variable.
`fgl_getfile( remotePath STRING, localPath STRING )`	Retrieves a file from the front-end context to the virtual machine context.
`fgl_gethelp( id INTEGER ) RETURNS STRING`	Reads the current help file, returning help text based on the help identifier.
`fgl_getkey() RETURNS INTEGER`	Waits for a keystroke and returns the key number.
`fgl_getkeylabel( keyName STRING ) RETURNS STRING`	Returns the default label associated to a key.
`fgl_getpid() RETURNS INTEGER`	Returns the system process identifier.
`fgl_getresource( name STRING ) RETURNS STRING`	Returns the value of an FGLPROFILE entry.
`fgl_getversion() RETURNS STRING`	Returns the product version number of Genero.
`fgl_getwin_height() RETURNS INTEGER`	Returns the number of rows of the current window.
`fgl_getwin_width() RETURNS INTEGER`	Returns the width of the current window as a number of columns.
`fgl_getwin_x() RETURNS INTEGER`	Returns the horizontal position of the current window.
`fgl_getwin_y() RETURNS INTEGER`	Returns the vertical position of the current window.
`fgl_keyval( keyName STRING ) RETURNS INTEGER`	Returns the key code of a logical or physical key.
`fgl_lastkey() RETURNS INTEGER`	Returns the key code corresponding to the logical key that the user most recently typed in the form.
`fgl_mblen( str STRING ) RETURNS INTEGER`	Returns the number of bytes of the first character in a string.
`fgl_putfile( localPath STRING, remotePath STRING)`	Transfers a file from the virtual machine context to the front end context.
`fgl_report_print_binary_file( path STRING )`	Prints a file containing binary data during a report.
`fgl_report_set_document_handler( handler om.SaxDocumentHandler )`	Redirects the next report to an XML document handler.
`fgl_scr_size( name STRING ) RETURNS INTEGER`	Returns the size of the specified screen array in the current form.
`fgl_set_arr_curr( row INTEGER )`	Moves to a specific row in a record list.
`fgl_setenv( name STRING, value STRING )`	Sets the value of an environment variable.
`fgl_setkeylabel( keyName STRING, text STRING )`	Sets the default label associated to a key.
`fgl_setsize( height INTEGER, width INTEGER )`	Sets the size of the main application window.
`fgl_settitle( newTitle STRING )`	Sets the title of the current application window.
`fgl_sqldebug( level INTEGER )`	Sets the SQL debug level from program code.
`fgl_system( program STRING )`	Runs a command on the application server.
`fgl_width( str STRING ) RETURNS INTEGER`	Returns the number of columns needed to represent the printed version of the expression.
`fgl_window_getoption( name STRING ) RETURNS STRING`	Returns attributes of the current window.
`length( str STRING ) RETURNS INTEGER`	Returns the number of the character string passed as parameter.
`num_args() RETURNS INTEGER`	Returns the number of program arguments.
`scr_line() RETURNS INTEGER`	Returns the index of the current row in the screen array.
`set_count( count INTEGER )`	Defines the number of rows containing explicit data in a static array used by the next dialog.
`showhelp( number INTEGER )`	Displays a runtime help text.
`startlog( path STRING )`	Initializes error logging and opens the error log file passed as the parameter.
`upshift( s STRING ) RETURNS STRING`	Converts a string to uppercase.