145 lines
6.6 KiB
Plaintext
145 lines
6.6 KiB
Plaintext
.\"***************************************************************************
|
|
.\" 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 *
|
|
.\" "Software"), to deal in the Software without restriction, including *
|
|
.\" without limitation the rights to use, copy, modify, merge, publish, *
|
|
.\" distribute, distribute with modifications, sublicense, and/or sell *
|
|
.\" copies of the Software, and to permit persons to whom the Software is *
|
|
.\" furnished to do so, subject to the following conditions: *
|
|
.\" *
|
|
.\" The above copyright notice and this permission notice shall be included *
|
|
.\" in all copies or substantial portions of the Software. *
|
|
.\" *
|
|
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
|
|
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
|
|
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
|
|
.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
|
|
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
|
|
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
|
|
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
|
|
.\" *
|
|
.\" Except as contained in this notice, the name(s) of the above copyright *
|
|
.\" holders shall not be used in advertising or otherwise to promote the *
|
|
.\" sale, use or other dealings in this Software without prior written *
|
|
.\" authorization. *
|
|
.\"***************************************************************************
|
|
.\"
|
|
.\" $Id: form_field_validation.3x,v 1.16 2006/12/24 16:08:08 tom Exp $
|
|
.TH form_field_validation 3X ""
|
|
.SH NAME
|
|
\fBform_field_validation\fR - data type validation for fields
|
|
.SH SYNOPSIS
|
|
\fB#include <form.h>\fR
|
|
.br
|
|
int set_field_type(FIELD *field, FIELDTYPE *type, ...);
|
|
.br
|
|
FIELDTYPE *field_type(const FIELD *field);
|
|
.br
|
|
void *field_arg(const FIELD *field);
|
|
.sp
|
|
FIELDTYPE *TYPE_ALNUM;
|
|
.br
|
|
FIELDTYPE *TYPE_ALPHA;
|
|
.br
|
|
FIELDTYPE *TYPE_ENUM;
|
|
.br
|
|
FIELDTYPE *TYPE_INTEGER;
|
|
.br
|
|
FIELDTYPE *TYPE_NUMERIC;
|
|
.br
|
|
FIELDTYPE *TYPE_REGEXP;
|
|
.br
|
|
FIELDTYPE *TYPE_IPV4;
|
|
.br
|
|
.SH DESCRIPTION
|
|
The function \fBset_field_type\fR declares a data type for a given form field.
|
|
This is the type checked by validation functions.
|
|
The predefined types are as follows:
|
|
.TP 5
|
|
TYPE_ALNUM
|
|
Alphanumeric data. Requires a third \fBint\fR argument, a minimum field width.
|
|
.TP 5
|
|
TYPE_ALPHA
|
|
Character data. Requires a third \fBint\fR argument, a minimum field width.
|
|
.TP 5
|
|
TYPE_ENUM
|
|
Accept one of a specified set of strings. Requires a third \fB(char **)\fR
|
|
argument pointing to a string list; a fourth \fBint\fR flag argument to enable
|
|
case-sensitivity; and a fifth \fBint\fR flag argument specifying whether a partial
|
|
match must be a unique one (if this flag is off, a prefix matches the first
|
|
of any set of more than one list elements with that prefix). Please notice
|
|
that the string list is not copied, only a reference to it is stored in the
|
|
field. So you should avoid using a list that lives in automatic variables
|
|
on the stack.
|
|
.TP 5
|
|
TYPE_INTEGER
|
|
Integer data, parsable to an integer by \fBatoi(3)\fR. Requires a third
|
|
\fBint\fR argument controlling the precision, a fourth \fBlong\fR argument
|
|
constraining minimum value, and a fifth \fBlong\fR constraining maximum value.
|
|
If the maximum value is less than or equal to the minimum value, the range is
|
|
simply ignored. On return the field buffer is formatted according to the
|
|
\fBprintf\fR format specification ".*ld", where the '*' is replaced by the
|
|
precision argument.
|
|
For details of the precision handling see \fBprintf's\fR man-page.
|
|
.TP 5
|
|
TYPE_NUMERIC
|
|
Numeric data (may have a decimal-point part). Requires a third
|
|
\fBint\fR argument controlling the precision, a fourth \fBdouble\fR
|
|
argument constraining minimum value, and a fifth \fBdouble\fR constraining
|
|
maximum value. If your system supports locales, the decimal point character
|
|
to be used must be the one specified by your locale.
|
|
If the maximum value is less than or equal to the minimum value, the range is
|
|
simply ignored. On return the field buffer is formatted according to the
|
|
\fBprintf\fR format specification ".*f", where the '*' is replaced by the
|
|
precision argument.
|
|
For details of the precision handling see \fBprintf's\fR man-page.
|
|
.TP 5
|
|
TYPE_REGEXP
|
|
Regular expression data. Requires a regular expression \fB(char *)\fR third argument;
|
|
the data is valid if the regular expression matches it. Regular expressions
|
|
are in the format of \fBregcomp\fR and \fBregexec\fR. Please notice
|
|
that the regular expression must match the whole field. If you have for
|
|
example an eight character wide field, a regular expression "^[0-9]*$" always
|
|
means that you have to fill all eight positions with digits. If you want to
|
|
allow fewer digits, you may use for example "^[0-9]* *$" which is good for
|
|
trailing spaces (up to an empty field), or "^ *[0-9]* *$" which is good for
|
|
leading and trailing spaces around the digits.
|
|
.TP 5
|
|
TYPE_IPV4
|
|
An Internet Protocol Version 4 address. This requires no additional argument. It
|
|
is checked whether or not the buffer has the form a.b.c.d, where a,b,c and d are
|
|
numbers between 0 and 255. Trailing blanks in the buffer are ignored. The address
|
|
itself is not validated. Please note that this is an ncurses extension. This
|
|
field type may not be available in other curses implementations.
|
|
.PP
|
|
It is possible to set up new programmer-defined field types. See the
|
|
\fBform_fieldtype\fR(3X) manual page.
|
|
.SH RETURN VALUE
|
|
The functions \fBfield_type\fR and \fBfield_arg\fR return \fBNULL\fR on
|
|
error. The function \fBset_field_type\fR returns one of the following:
|
|
.TP 5
|
|
.B E_OK
|
|
The routine succeeded.
|
|
.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.
|
|
.SH PORTABILITY
|
|
These routines emulate the System V forms library. They were not supported on
|
|
Version 7 or BSD versions.
|
|
.SH AUTHORS
|
|
Juergen Pfeifer. Manual pages and adaptation for new curses by Eric
|
|
S. Raymond.
|
|
.\"#
|
|
.\"# The following sets edit modes for GNU EMACS
|
|
.\"# Local Variables:
|
|
.\"# mode:nroff
|
|
.\"# fill-column:79
|
|
.\"# End:
|