field_buffer(3) - NetBSD Manual Pages

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FORMS(3)                NetBSD Library Functions Manual               FORMS(3)


NAME

     field_buffer, field_status, set_field_buffer, set_field_printf,
     set_field_status, set_max_field -- form library


LIBRARY

     Curses Form Library (libform, -lform)


SYNOPSIS

     #include <form.h>

     char *
     field_buffer(FIELD *field, int buffer);

     int
     field_status(FIELD *field);

     int
     set_field_buffer(FIELD *field, int buffer, char *value);

     int
     set_field_printf(FIELD *field, int buffer, char *fmt, ...);

     int
     set_field_status(FIELD *field, int status);

     int
     set_max_field(FIELD *field, int max);


DESCRIPTION

     The field_buffer() function returns the contents of the buffer number
     specified by buffer for the given field.  If the requested buffer number
     exceeds the number of buffers attached to the field then NULL will be
     returned.  If the field option O_REFORMAT is enabled on the given field
     then storage will be allocated to hold the reformatted buffer.  This
     storage must be release by calling free(3) when it is no longer required.
     If the O_REFORMAT field option is not set then no extra storage is allo-
     cated.  The field buffer may be set by calling set_field_buffer() which
     will set the given buffer number to the contents of the string passed.  A
     buffer may also be set by calling set_field_printf() which sets the
     buffer using the format arg fmt after being expanded using the subsequent
     arguments in the same manner as sprintf(3) does.  Calling field_status()
     will return the status of the first buffer attached to the field.  If the
     field has been modified then the function will return TRUE otherwise
     FALSE is returned, the status of the first buffer may be programmatically
     set by calling set_field_status().  The maximum growth of a dynamic field
     can be set by calling set_max_field() which limits the fields rows if the
     field is a multiline field or the fields columns if the field only has a
     single row.


RETURN VALUES

     Functions returning pointers will return NULL if an error is detected.
     The functions that return an int will return one of the following error
     values:

     E_OK               The function was successful.
     E_BAD_ARGUMENT     A bad parameter was passed to the function.
     E_SYSTEM_ERROR     A system error occurred performing the function.


SEE ALSO

     curses(3), forms(3)


NOTES

     The header <form.h> automatically includes both <curses.h> and <eti.h>.
     The function set_field_printf() is a NetBSD extension and must not be
     used in portable code.

NetBSD 8.0                     October 15, 2005                     NetBSD 8.0