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30 .\" $Id: form_variables.3x,v 1.9 2021/12/25 21:50:36 tom Exp $
31 .TH form_variables 3X ""
42 \- form system global variables
47 \fB#include <form.h>\fP
49 \fBFIELDTYPE * TYPE_ALNUM;\fP
50 \fBFIELDTYPE * TYPE_ALPHA;\fP
51 \fBFIELDTYPE * TYPE_ENUM;\fP
52 \fBFIELDTYPE * TYPE_INTEGER;\fP
53 \fBFIELDTYPE * TYPE_IPV4;\fP
54 \fBFIELDTYPE * TYPE_NUMERIC;\fP
55 \fBFIELDTYPE * TYPE_REGEXP;\fP
58 These are building blocks for the form library,
59 defining fields that can be created using
60 the \fBform_fieldtype\fP(3X) functions.
61 Each provides functions for field- and character-validation,
62 according to the given datatype.
64 This holds alphanumeric data.
66 This holds alphabetic data.
68 This holds an enumerated type.
70 This holds a decimal integer.
72 This holds an IPv4 internet address, e.g., "127.0.0.1".
74 This holds a decimal number, with optional sign and decimal point.
76 This holds a regular expression.
78 The \fBTYPE_IPV4\fP variable is an extension not provided by older
79 implementations of the form library.