MirOS Manual: field_buffer(3), field_status(3), form_field_buffer(3), set_field_buffer(3), set_field_status(3), set_max_field(3)


form_field_buffer(3)UNIX Programmer's Manual form_field_buffer(3)

NAME

     form_field_buffer - field buffer control

SYNOPSIS

     #include <form.h>
     int set_field_buffer(FIELD *field, int buf, const char
     *value);
     char *field_buffer(const FIELD *field, int buffer);
     int set_field_status(FIELD *field, bool status);
     bool field_status(const FIELD *field);
     int set_max_field(FIELD *field, int max);

DESCRIPTION

     The function set_field_buffer sets the numbered buffer of
     the given field to contain a given string.  Buffer 0 is the
     displayed value of the field; other numbered buffers may be
     allocated by applications through the nbuf argument of (see
     form_field_new(3)) but are not manipulated by the forms
     library.  The function field_buffer returns the address of
     the buffer. Please note that this buffer has always the
     length of the buffer, that means that it may typically con-
     tain trailing spaces. If you entered leading spaces the
     buffer may also contain them. If you want the raw data, you
     must write your own routine that copies the value out of the
     buffer and removes the leading and trailing spaces. Please
     note also, that subsequent operations on the form will prob-
     ably change the content of the buffer. So do not use it for
     long term storage of the entered form data.

     The function set_field_status sets the associated status
     flag of field; field_status gets the current value.  The
     status flag is set to a nonzero value whenever the field
     changes.

     The function set_max_field sets the maximum size for a
     dynamic field. An argument of 0 turns off any maximum size
     threshold for that field.

RETURN VALUE

     The field_buffer function returns NULL on error.

     The field_status function returns TRUE or FALSE.

     The remaining routines return one of the following:

     E_OK The routine succeeded.

     E_SYSTEM_ERROR
          System error occurred (see errno).

     E_BAD_ARGUMENT
          Routine detected an incorrect or out-of-range argument.

MirOS BSD #10-current  Printed 03.04.2017                       1

form_field_buffer(3)UNIX Programmer's Manual form_field_buffer(3)

SEE ALSO

     curses(3) and related pages whose names begin "form_" for
     detailed descriptions of the entry points.

NOTES

     The header file <form.h> automatically includes the header
     file

     When configured for wide-characters, field_buffer returns a
     pointer to temporary storage (allocated and freed by the
     library). The application should not attempt to modify the
     data. It will be freed on the next call to field_buffer to
     return the same buffer. <curses.h>.

PORTABILITY

     These routines emulate the System V forms library.  They
     were not supported on Version 7 or BSD versions.

AUTHORS

     Juergen Pfeifer.  Manual pages and adaptation for new curses
     by Eric S. Raymond.

MirOS BSD #10-current  Printed 03.04.2017                       2

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