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form_field_userptr 3x 2023-11-25 ncurses 6.4 Library calls

form_field_userptr(3x)           Library calls          form_field_userptr(3x)




NAME

       set_field_userptr,  field_userptr  -  associate application data with a
       form field


SYNOPSIS

       #include <form.h>

       int set_field_userptr(FIELD *field, void *userptr);
       void *field_userptr(const FIELD *field);


DESCRIPTION

       Every form field has a field that can  be  used  to  hold  application-
       specific  data  (that is, the form-driver code leaves it alone).  These
       functions get and set that field.


RETURN VALUE

       The function field_userptr returns a pointer (which may be  NULL).   It
       does not set errno.

       The function set_field_userptr returns E_OK (success).


PORTABILITY

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

       The user pointer is a void pointer.  We chose not to leave it as a char
       pointer for SVr4 compatibility.


AUTHORS

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


SEE ALSO

       curses(3x), form(3x)



ncurses 6.4                       2023-11-25            form_field_userptr(3x)