ncurses 5.7 - patch 20100220

[ncurses.git] / man / form_fieldtype.3x

diff --git a/man/form_fieldtype.3x b/man/form_fieldtype.3x
index 979258a2ba976c8e553e67dcade24f762c8c4232..0d42faed6cc279678f3573a13663edecf07b541b 100644 (file)
--- a/man/form_fieldtype.3x
+++ b/man/form_fieldtype.3x
@@ -1,6 +1,6 @@
 '\" t
 .\"***************************************************************************
-.\" Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
+.\" Copyright (c) 1998-2003,2006 Free Software Foundation, Inc.              *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *
@@ -27,7 +27,7 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
-.\" $Id: form_fieldtype.3x,v 1.12 2003/05/10 20:33:49 jmc Exp $
+.\" $Id: form_fieldtype.3x,v 1.14 2006/11/04 17:12:00 tom Exp $
 .TH form_fieldtype 3X ""
 .SH NAME
 \fBform_fieldtype\fR - define validation-field types
@@ -61,14 +61,14 @@ validity of an entered data string whenever the user attempts to leave a field.
 The (FIELD *) argument is passed in so the validation predicate can see the
 field's buffer, sizes and other attributes; the second argument is an
 argument-block structure, about which more below.
-
+.PP
 You also supply \fBnew_fieldtype\fR with \fIchar_check\fR,
 a function to validate input characters as they are entered; it will be passed
 the character to be checked and a pointer to an argument-block structure.
-
+.PP
 The function \fBfree_fieldtype\fR frees the space allocated for a given
 validation type.
-
+.PP
 The function \fBset_fieldtype_arg\fR associates three storage-management functions
 with a field type.
 The \fImake_arg\fR function is automatically applied to the
@@ -82,11 +82,11 @@ the other two are optional, you may supply NULL for them.
 In this case it is assumed
 that \fImake_arg\fR does not allocate memory but simply loads the
 argument into a single scalar value.
-
+.PP
 The function \fBlink_fieldtype\fR creates
 a new field type from the two given types.
 They are connected by an logical 'OR'.
-
+.PP
 The form driver requests \fBREQ_NEXT_CHOICE\fR and \fBREQ_PREV_CHOICE\fR assume
 that the possible values of a field form an ordered set, and provide the forms
 user with a way to move through the set.
@@ -97,27 +97,40 @@ These functions take the field pointer and an
 argument-block structure as arguments.
 .SH RETURN VALUE
 The pointer-valued routines return NULL on error.
-
+They set errno according to their success:
+.TP 5
+.B E_OK
+The routine succeeded.
+.TP 5
+.B E_BAD_ARGUMENT
+Routine detected an incorrect or out-of-range argument.
+.TP 5
+.B E_SYSTEM_ERROR
+System error occurred, e.g., malloc failure.
+.PP
 The integer-valued routines return one of the following codes on
 error:
 .TP 5
-\fBE_OK\fR
+.B E_OK
 The routine succeeded.
 .TP 5
-\fBE_SYSTEM_ERROR\fR
-System error occurred (see \fBerrno\fR).
-.TP 5
-\fBE_BAD_ARGUMENT\fR
+.B E_BAD_ARGUMENT
 Routine detected an incorrect or out-of-range argument.
 .TP 5
-\fBE_CONNECTED\fR
+.B E_CONNECTED
 The field is already connected to a form.
+.TP 5
+.B E_CURRENT
+The field is the current field.
+.TP 5
+.B E_SYSTEM_ERROR
+System error occurred (see \fBerrno\fR).
 .SH SEE ALSO
 \fBcurses\fR(3X), \fBform\fR(3X).
 .SH NOTES
 The header file \fB<form.h>\fR automatically includes the header file
 \fB<curses.h>\fR.
-
+.PP
 All of the \fB(char *)\fR arguments of these functions should actually be
 \fB(void *)\fR.  The type has been left uncorrected for strict compatibility
 with System V.