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13.2 The Output Library

Text is formatted on assumed or indicated output devices. The output functions have signatures in the form void <prefix>_<report>(arguments) or <type> <prefix>_<report>(arguments), where prefix indicates the output device and report indicates what and how is formatted. The prefix may be one of ‘o’ and ‘v’, with the formatting done on standard output or standard error, respectively, and ‘f’ and ‘b’, with the formatting done on the file or on the byte array indicated by the first argument.

The assumed output device functions (the ‘o’ and ‘v’ prefixed ones) evaluate to no value.

The indicated output device functions (the ‘f’ and ‘b’ prefixed ones) will have one extra first parameter, indicating the device. They evaluate to the device first argument.

See The File Library.

See The Byte Data Library.

Thus the <prefix>_integer functions, formatting an integer in decimal include:

• void o_integer(integer m);

  with output on standard output

• void v_integer(integer m);

  with output on standard error

• file f_integer(file f, integer m);

  with output on f

• data b_integer(data b, integer m);

  with output on b

The function descriptions for the output library are given for assumed devices.

• Output Functions
• Byte Data Output Functions
• The _form Function