ctrl

ctrl("switch"[,obj])

:: Sets the value of switch.

return

value of switch

switch

switch name

obj

parameter

• This function is used to set or to get the values of switches. The switches are used to control an execution of Asir.
• If obj is not specified, the value of switch is returned.
• If obj is specified, the value of switch is set to obj.
• Switches are specified by strings, namely, enclosed by two double quotes.
• Here are of switches of Asir.

  cputime

  If `on', CPU time and GC time is displayed at every top level evaluation of Asir command; if `off', not displayed. See section cputime, tstart, tstop. (The switch is also set by command cputime(1), and reset by cputime(0).)

  nez

  Selection for EZGCD algorithm. It is set to 1 by default. Ordinary users need not change this setting.

  echo

  If `on', inputs from the standard input will be echoed onto the standard output. When executing to load a file, the contents of the file will be written onto the standard output. If `off', the inputs will not be echoed. This command will be useful when used with command output.

  bigfloat

  If `on', floating operations will be done by PARI system with arbitrary precision floating point operations. Default precision is set to 9 digits. To change the precision, use command setprec. If `off', floating operations will be done by Asir's own floating operation routines with a fixed precision operations of standard floating double.

  adj

  Sets the frequency of garbage collection. A rational number greater than or equal to 1 can be specified. The default value is 3. If a value closer to 1 is specified, larger heap is allocated and as a result, the frequency of garbage collection decreases. See section Command line options.

  verbose

  If `on' a warning messages is displayed when a function is redefined.

  quiet_mode

  If 1 is set, the copyright notice has been displayed at boot time.

  prompt

  If the value is 0, then prompt is not output. If the value is 1, then the standard prompt is output. Asir prompt can be customized by giving a C-style format string. Example (for unix asir); ctrl("prompt","\033[32m[%d]:= \033[0m")

  hex

  If 1 is set, integers are displayed as hexadecimal numbers with prefix 0x. if -1 is set, hexadecimal numbers are displayed with `|' inserted at every 8 hexadecimal digits.

  real_digit

  Sets the number of digits used to print a floating double.

  double_output

  If set to 1, any floating double is printed in the style ddd.ddd.

  fortran_output

  If `on' polynomials are displayed in FORTRAN style. That is, a power is represented by `**' instead of `^'. The default value is 'off.

  ox_batch

  If 'on', the OpenXM send buffer is flushed only when the buffer is full. If 'off', the buffer is always flushed at each sending of data or command. The default value is 'off'. See section Distributed computation.

  ox_check

  If 'on' the check by mathcap is done before sending data. The default value is 'on'. See section Distributed computation.

  ox_exchange_mathcap

  If 'on' Asir forces the exchange of mathcaps at the communication startup. The default value is 'on'. See section Distributed computation.

References

section cputime, tstart, tstop, section output, section pari, section setprec, section eval, deval.

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