field_new(3FORM) Library calls field_new(3FORM)
NAME
new_field, dup_field, link_field, free_field - create and destroy form
fields
SYNOPSIS
#include <form.h>
FIELD *new_field(int height, int width,
int toprow, int leftcol,
int offscreen, int nbuffers);
FIELD *dup_field(FIELD *field, int toprow, int leftcol);
FIELD *link_field(FIELD *field, int toprow, int leftcol);
int free_field(FIELD *field);
DESCRIPTION
The function new_field allocates a new field and initializes it from the
parameters given: height, width, row of upper-left corner, column of up-
per-left corner, number off-screen rows, and number of additional work-
ing buffers.
The function dup_field duplicates a field at a new location. Most at-
tributes (including current contents, size, validation type, buffer
count, growth threshold, justification, foreground, background, pad
character, options, and user pointer) are copied. Field status and the
field page bit are not copied.
The function link_field acts like dup_field, but the new field shares
buffers with its parent. Attribute data is separate.
The function free_field de-allocates storage associated with a field.
RETURN VALUE
The functions new_field, dup_field, link_field return NULL on error.
They set errno according to their success:
E_OK The routine succeeded.
E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
E_SYSTEM_ERROR
System error occurred, e.g., malloc failure.
The function free_field returns one of the following:
E_OK The routine succeeded.
E_BAD_ARGUMENT
Routine detected an incorrect or out-of-range argument.
E_CONNECTED
field is connected.
PORTABILITY
These routines emulate the System V forms library. They were not sup-
ported on Version 7 or BSD versions.
It may be unwise to count on the set of attributes copied by dup_field
being portable; the System V forms library documents are not very ex-
plicit about what gets copied and what does not.
AUTHORS
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S.
Raymond.
SEE ALSO
ncurses(3NCURSES), form(3FORM)
ncurses 6.5 2024-12-28 field_new(3FORM)
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