<!--
****************************************************************************
- * Copyright (c) 1998-2006,2010 Free Software Foundation, Inc. *
+ * Copyright (c) 1998-2018,2019 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 *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************
- * @Id: form_field_validation.3x,v 1.20 2010/12/04 18:38:55 tom Exp @
+ * @Id: form_field_validation.3x,v 1.24 2019/01/20 20:31:42 tom Exp @
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
-<meta name="generator" content="Manpage converted by man2html - see http://invisible-island.net/scripts/readme.html#others_scripts">
+<meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts">
<TITLE>form_field_validation 3x</TITLE>
-<link rev=made href="mailto:bug-ncurses@gnu.org">
+<link rel="author" href="mailto:bug-ncurses@gnu.org">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</HEAD>
<BODY>
width.
TYPE_ENUM
- Accept one of a specified set of strings. Requires a third <STRONG>(char</STRONG>
- <STRONG>**)</STRONG> argument pointing to a string list; a fourth <STRONG>int</STRONG> flag argument
- to enable case-sensitivity; and a fifth <STRONG>int</STRONG> flag argument specify-
- ing 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
- copied. So you may use a list that lives in automatic variables on
- the stack.
+ Accept one of a specified set of strings. Requires additional
+ parameters:
+
+ <STRONG>o</STRONG> a third <STRONG>(char</STRONG> <STRONG>**)</STRONG> argument pointing to a string list;
+
+ <STRONG>o</STRONG> a fourth <STRONG>int</STRONG> flag argument to enable case-sensitivity;
+
+ <STRONG>o</STRONG> and a fifth <STRONG>int</STRONG> 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.
+
+ The library copies the string list, so you may use a list that
+ lives in automatic variables on the stack.
TYPE_INTEGER
- Integer data, parsable to an integer by <STRONG>atoi(3)</STRONG>. Requires a third
- <STRONG>int</STRONG> argument controlling the precision, a fourth <STRONG>long</STRONG> argument
- constraining minimum value, and a fifth <STRONG>long</STRONG> 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 <STRONG>printf</STRONG> format specification ".*ld",
- where the '*' is replaced by the precision argument. For details
- of the precision handling see <STRONG>printf's</STRONG> man-page.
+ Integer data, parsable to an integer by <STRONG>atoi(3)</STRONG>. Requires addi-
+ tional parameters:
+
+ <STRONG>o</STRONG> a third <STRONG>int</STRONG> argument controlling the precision,
+
+ <STRONG>o</STRONG> a fourth <STRONG>long</STRONG> argument constraining minimum value,
+
+ <STRONG>o</STRONG> and a fifth <STRONG>long</STRONG> 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 <STRONG>printf</STRONG> format specification ".*ld", where the
+ "*" is replaced by the precision argument.
+
+ For details of the precision handling see <STRONG>printf(3)</STRONG>.
TYPE_NUMERIC
- Numeric data (may have a decimal-point part). Requires a third <STRONG>int</STRONG>
- argument controlling the precision, a fourth <STRONG>double</STRONG> argument con-
- straining minimum value, and a fifth <STRONG>double</STRONG> constraining maximum
- value. If your system supports locales, the decimal point charac-
- ter 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 <STRONG>printf</STRONG> format specification ".*f", where the '*'
- is replaced by the precision argument. For details of the preci-
- sion handling see <STRONG>printf's</STRONG> man-page.
+ Numeric data (may have a decimal-point part). This requires addi-
+ tional parameters:
+
+ <STRONG>o</STRONG> a third <STRONG>int</STRONG> argument controlling the precision,
+
+ <STRONG>o</STRONG> a fourth <STRONG>double</STRONG> argument constraining minimum value,
+
+ <STRONG>o</STRONG> and a fifth <STRONG>double</STRONG> constraining maximum value. If your system
+ supports locales, the decimal point character 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
+ <STRONG>printf</STRONG> format specification ".*f", where the "*" is replaced
+ by the precision argument.
+
+ For details of the precision handling see <STRONG>printf(3)</STRONG>.
TYPE_REGEXP
- Regular expression data. Requires a regular expression <STRONG>(char</STRONG> <STRONG>*)</STRONG>
- third argument; the data is valid if the regular expression
- matches it. Regular expressions are in the format of <STRONG>regcomp</STRONG> and
- <STRONG>regexec</STRONG>. 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]* *$"
- which is good for leading and trailing spaces around the digits.
+ Regular expression data. Requires a regular expression <STRONG>(char</STRONG> <STRONG>*)</STRONG>
+ third argument. The data is valid if the regular expression
+ matches it.
+
+ Regular expressions are in the format of <STRONG>regcomp</STRONG> and <STRONG>regexec</STRONG>.
+
+ The regular expression must match the whole field. If you have
+ for example, an eight character wide field, a regular expression
+ "^[0-9]*$" 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.
TYPE_IPV4
- An Internet Protocol Version 4 address. This requires no addi-
- tional 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.
+ An Internet Protocol Version 4 address. This requires no addi-
+ tional argument. The library checks 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.
+
+ This is an ncurses extension; this field type may not be available
+ in other curses implementations.
It is possible to set up new programmer-defined field types. See the
<STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG> manual page.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- The functions <STRONG>field_type</STRONG> and <STRONG>field_arg</STRONG> return <STRONG>NULL</STRONG> on error. The func-
+ The functions <STRONG>field_type</STRONG> and <STRONG>field_arg</STRONG> return <STRONG>NULL</STRONG> on error. The func-
tion <STRONG>set_field_type</STRONG> returns one of the following:
<STRONG>E_OK</STRONG> The routine succeeded.
<STRONG>E_SYSTEM_ERROR</STRONG>
- System error occurred (see <STRONG>errno</STRONG>).
+ System error occurred (see <STRONG>errno(3)</STRONG>).
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>