Portability Routines: table

Programs that use these routines must access the portability library with USE IFPORT.

Name Procedure Type Description
Information Retrieval:
FSTAT Function Returns information about a logical file unit.
GETCWD Function Returns the pathname of the current working directory.
GETENV Function Searches the environment for a given string and returns its value if found.
GETGID Function Returns the group ID of the user.
GETLOG Subroutine Returns the user's login name.
GETPID Function Returns the process ID of the process.
GETUID Function Returns the user ID of the user of the process.
HOSTNAM1 Function Returns the name of the user's host.
ISATTY Function Checks whether a logical unit number is a terminal.
LSTAT Function Returns information about a named file. STAT is the preferred form of this function.
RENAME Function Renames a file.
STAT Function Returns information about a named file.
UNLINK Function Deletes the file given by path.
Process Control:
ABORT Subroutine Stops execution of the current process, clears I/O buffers, and writes a string to external unit 0.
ALARM Function Executes an external subroutine after waiting a specified number of seconds.
KILL Function Sends a signal code to the process given by ID.
SIGNAL Function Changes the action for signal.
SLEEP Subroutine Suspends program execution for a specified number of seconds.
SYSTEM Function Executes a command in a separate shell.
Numeric Values and Conversion:
BESJ0, BESJ1,
BESJN, BESY0,
BESY1, BESYN		 Functions Return single-precision values of Bessel functions of the first and second kind of orders 1, 2, and n, respectively.
BIC, BIS,
BIT		 Subroutines
Function		 Perform bit level clear, set, and test for integers.
CDFLOAT Function Converts a COMPLEX(4) argument to DOUBLE PRECISION type.
COMPLINT, COMPLREAL, COMPLLOG Functions Return a BIT-WISE complement or logical .NOT. of the argument.
CSMG Function Performs an effective BIT-WISE store under mask.
DBESJ0, DBESJ1,
DBESJN, DBESY0,
DBESY1, DBESYN		 Functions Return double-precision values of Bessel functions of the first and second kind of orders 1, 2, and n, respectively.
DFLOATI, DFLOATJ, DFLOATK Functions Convert an integer to double-precision real type.
DRAND,
DRANDM		 Functions Return random numbers between 0.0 and 1.0.
DRANSET Subroutine Sets the seed for the random number generator.
IDFLOAT Function Converts an INTEGER(4) argument to double-precision real type.
IFLOATI, IFLOATJ Functions Convert an integer to single-precision real type.
INMAX Function Returns the maximum positive value for an integer.
INTC Function Converts an INTEGER(4) argument to INTEGER(2) type.
IRAND,
IRANDM		 Functions Return a positive integer in the range 0 through 2**31-1 or 2**15-1 if called without an argument.
IRANGET Subroutine Returns the current seed.
IRANSET Subroutine Sets the seed for the random number generator.
JABS Function Computes an absolute value.
LONG Function Converts an INTEGER(2) argument to INTEGER(4) type.
QRANSET Subroutine Sets the seed for a sequence of pseudo-random numbers.
RAND,
RANDOM2		 Functions Return random values in the range 0 through 1.0.
RANF Function Generates a random number between 0.0 and RAND_MAX.
RANGET Subroutine Returns the current seed.
RANSET Subroutine Sets the seed for the random number generator.
SEED Subroutine Changes the starting point of RANDOM.
SHORT Function Converts an INTEGER(4) argument to INTEGER(2) type.
SRAND Subroutine Seeds the random number generator used with IRAND and RAND.
Input and Output:
ACCESS Function Checks a file for accessibility according to mode.
CHMOD Function Changes file attributes.
FGETC Function Reads a character from an external unit.
FLUSH Subroutine Flushes the buffer for an external unit to its associated file.
FPUTC Function Writes a character to an external unit.
FSEEK Subroutine Repositions a file on an external unit.
FTELL, FTELLI8 Function Return the offset, in bytes, from the beginning of the file.
GETC Function Reads a character from unit 5.
GETPOS, GETPOSI8 Functions Return the offset, in bytes, from the beginning of the file.
PUTC Function Writes a character to unit 6.
Date and Time:
CLOCK Function Returns current time in HH:MM:SS format using a 24-hour clock.
CLOCKX Subroutine Returns the processor clock to the nearest microsecond.
CTIME Function Converts system time to a 24-character ASCII string.
DATE3 Subroutine
or Function		 Returns the current system date.
DATE4 Subroutine Returns the current system date.
DCLOCK Function Returns the elapsed time in seconds since the start of the current process.
DTIME Function Returns CPU time since later of (1) start of program, or (2) most recent call to DTIME.
ETIME Function Returns elapsed CPU time since the start of program execution.
FDATE Subroutine
or Function		 Returns the current date and time as an ASCII string.
GETDAT Subroutine Returns the date.
GETTIM Subroutine Returns the time.
GMTIME Subroutine Returns Greenwich Mean Time as a 9-element integer array.
IDATE3 Subroutine Returns the date either as one 3-element array or three scalar parameters (month, day, year).
IDATE4 Subroutine Returns the date either as one 3-element array or three scalar parameters (month, day, year).
ITIME Subroutine Returns current time as a 3-element array (hour, minute, second).
JDATE3 Function Returns current date as an 8-character string with the Julian date.
JDATE4 Function Returns current date as a 10-character string with the Julian date.
LTIME Subroutine Returns local time as a 9-element integer array.
RTC Function Returns number of seconds since 00:00:00 GMT, Jan 1, 1970.
SECNDS Function Returns number of seconds since midnight, less the value of its argument.
SETDAT Function Sets the date.
SETTIM Function Sets the time.
TIME Subroutine
or Function		 As a subroutine, returns time formatted as HH:MM:SS; as a function, returns time in seconds since 00:00:00 GMT, Jan 1, 1970.
TIMEF Function Returns the number of seconds since the first time this function was called (or zero).
Error Handling:
GETLASTERROR Function Returns the last error set.
GETLASTERRORQQ Function Returns the last error set by a run-time function or subroutine.
IERRNO Function Returns the last code error.
SETERRORMODEQQ Subroutine Sets the mode for handling critical errors.
Program Control:
RAISEQQ Function Sends an interrupt to the executing program, simulating an interrupt from the operating system.
RUNQQ Function Calls another program and waits for it to execute.
SIGNALQQ Function Controls signal handling.
SLEEPQQ Subroutine Delays execution of the program for the specified time.
System, Drive, and Directory:
CHDIR Function Changes the current working directory.
CHANGEDIRQQ Function Makes the specified directory the current (default) directory.
CHANGEDRIVEQQ Function Makes the specified drive the current drive.
DELDIRQQ Function Deletes a specified directory.
GETDRIVEDIRQQ Function Returns the current drive and directory path.
GETDRIVESIZEQQ Function Gets the size of the specified drive.
GETDRIVESQQ Function Reports the drives available to the system.
GETENVQQ Function Gets a value from the current environment.
MAKEDIRQQ Function Makes a directory with the specified directory name.
SETENVQQ Function Adds a new environment variable, or sets the value of an existing one.
SYSTEMQQ Function Executes a command by passing a command string to the operating system's command interpretor.
Speaker:
BEEPQQ Subroutine Sounds the speaker for a specified duration in milliseconds at a specified frequency in Hertz.
File Management:
DELFILESQQ Function Deletes the specified files in a specified directory.
FINDFILEQQ Function Searches for a file in the directories specified in the PATH environment variable.
FULLPATHQQ Function Returns the full path for a specified file or directory.
GETFILEINFOQQ Function Returns information about files with names that match a request string.
PACKTIMEQQ Subroutine Packs time values for use by SETFILETIMEQQ.
RENAMEFILEQQ Function Renames a file.
SETFILEACCESSQQ Function Sets file-access mode for the specified file.
SETFILETIMEQQ Function Sets modification time for a given file.
SPLITPATHQQ Function Breaks a full path into four components.
UNPACKTIMEQQ Subroutine Unpacks a file's packed time and date value into its component parts.
Arrays:
BSEARCHQQ Function Performs a binary search for a specified element on a sorted one-dimensional array of non-structure data types (derived types are not allowed).
SORTQQ Subroutine Sorts a one-dimensional array of non-structure data types (derived types are not allowed).
Floating-Point Inquiry and Control:
CLEARSTATUSFPQQ Subroutine Clears the exception flags in the floating-point processor status word.
GETCONTROLFPQQ Subroutine Returns the value of the floating-point processor control word.
GETSTATUSFPQQ Subroutine Returns the value of the floating-point processor status word.
LCWRQQ Subroutine Same as SETCONTROLFPQQ.
SCWRQQ Subroutine Same as GETCONTROLFPQQ.
SETCONTROLFPQQ Subroutine Sets the value of the floating-point processor control word.
SSWRQQ Subroutine Same as GETSTATUSFPQQ.
IEEE Functionality:
IEEE_FLAGS Function Sets, gets, or clears IEEE flags.
IEEE_HANDLER Function Establishes a handler for IEEE exceptions.
Serial Port I/O:4
SPORT_CANCEL_IO Function Cancels any I/O in progress to the specified port.
SPORT_CONNECT Function Establishes the connection to a serial port and defines certain usage parameters.
SPORT_CONNECT_EX Function Establishes the connection to a serial port, defines certain usage parameters, and defines the size of the internal buffer for data reception.
SPORT_GET_HANDLE Function Returns the Windows* handle associated with the communications port.
SPORT_GET_STATE Function Returns the baud rate, parity, data bits, and stop bit settings of the communications port.
SPORT_GET_STATE_EX Function Returns the baud rate, parity, data bits setting, stop bits, and other settings of the communications port.
SPORT_GET_TIMEOUTS Function Returns the user selectable timeouts for the serial port.
SPORT_PEEK_DATA Function Returns information about the availability of input data.
SPORT_PEEK_LINE Function Returns information about the availability of input records.
SPORT_PURGE Function Executes a purge function on the specified port.
SPORT_READ_DATA Function Reads available data from the port specified.
SPORT_READ_LINE Function Reads a record from the port specified.
SPORT_RELEASE Function Releases a serial port that has previously been connected.
SPORT_SET_STATE Function Sets the baud rate, parity, data bits and stop bit settings of the communications port.
SPORT_SET_STATE_EX Function Sets the baud rate, parity, data bits setting, stop bits, and other settings of the communications port.
SPORT_SET_TIMEOUTS Function Sets the user selectable timeouts for the serial port.
SPORT_SHOW_STATE Function Displays the state of a port.
SPORT_SPECIAL_FUNC Function Executes a communications function on a specified port.
SPORT_WRITE_DATA Function Outputs data to a specified port.
SPORT_WRITE_LINE Function Outputs data to a specified port and follows it with a record terminator.
Miscellaneous:
LNBLNK Function Returns the index of the last non-blank character in a string.
QSORT Subroutine Returns a sorted version of a one-dimensional array of a specified number of elements of a named size.
RINDEX Function Returns the index of the last occurrence of a substring in a string.
SCANENV Subroutine Scans the environment for the value of an environment variable.
TTYNAM Function Checks whether a logical unit is a terminal.
1 This routine can also be specified as HOSTNM.
2 There is also a RANDOM subroutine in the portability library.
3 The two-digit year return value of DATE, IDATE, and JDATE may cause problems with the year 2000. Use the intrinsic subroutine DATE_AND_TIME instead.
4 W*32, W*64

See Also

Building Applications: Portability Library Overview