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<HTML>
+<HEAD>
+<TITLE>form_field_validation 3x</TITLE>
+<link rev=made href="mailto:bug-ncurses@gnu.org">
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+</HEAD>
<BODY>
+<H1>form_field_validation 3x</H1>
+<HR>
<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
+<STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG> <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>
+
+
+
</PRE>
<H2>NAME</H2><PRE>
- <B>form_field_validation</B> - data type validation for fields
+ <STRONG>form_field_validation</STRONG> - data type validation for fields
</PRE>
<H2>SYNOPSIS</H2><PRE>
- <B>#include</B> <B><form.h></B>
+ <STRONG>#include</STRONG> <STRONG><form.h></STRONG>
int set_field_type(FIELD *field, FIELDTYPE *type, ...);
FIELDTYPE *field_type(const FIELD *field);
void *field_arg(const FIELD *field);
+ FIELDTYPE *TYPE_ALNUM;
+ FIELDTYPE *TYPE_ALPHA;
+ FIELDTYPE *TYPE_ENUM;
+ FIELDTYPE *TYPE_INTEGER;
+ FIELDTYPE *TYPE_NUMERIC;
+ FIELDTYPE *TYPE_REGEXP;
+ FIELDTYPE *TYPE_IPV4;
+
</PRE>
<H2>DESCRIPTION</H2><PRE>
- The function <B>set_field_type</B> declares a data type for a
+ The function <STRONG>set_field_type</STRONG> declares a data type for a
given form field. This is the type checked by validation
- functions. The types are as follows:
+ functions. The predefined types are as follows:
TYPE_ALNUM
- Alphanumeric data. Requires a third <B>int</B> argument, a
+ Alphanumeric data. Requires a third <STRONG>int</STRONG> argument, a
minimum field width.
TYPE_ALPHA
- Character data. Requires a third <B>int</B> argument, a
+ Character data. Requires a third <STRONG>int</STRONG> argument, a
minimum field width.
TYPE_ENUM
Accept one of a specified set of strings. Requires a
- third <B>(char</B> <B>**)</B> argument pointing to a string list; a
- fourth <B>int</B> flag argument to enable case-sensitivity;
- and a fifth <B>int</B> flag argument specifying whether 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 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 to use a list that lives in automatic variables
+ avoid using a list that lives in automatic variables
on the stack.
TYPE_INTEGER
- Integer data, parsable to an integer by <B>atoi(3)</B>.
- Requires a third <B>int</B> argument controlling the preci-
- sion, a fourth <B>long</B> argument constraining minimum
- value, and a fifth <B>long</B> constraining maximum value.
- If the maximum value is less or equal the minimum
- value, the range is simply ignored. On return the
- field buffer is formatted according to the <B>printf</B>
+ Integer data, parsable to an integer by <STRONG>atoi(3)</STRONG>.
+ Requires a third <STRONG>int</STRONG> argument controlling the preci-
+ sion, 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 <B>printf's</B> man-page.
+ the precision handling see <STRONG>printf's</STRONG> man-page.
TYPE_NUMERIC
Numeric data (may have a decimal-point part).
- Requires a third <B>int</B> argument controlling the preci-
- sion, a fourth <B>double</B> argument constraining minimum
- value, and a fifth <B>double</B> constraining maximum value.
- If your system supports locale's, the decimal point
+ Requires a third <STRONG>int</STRONG> argument controlling the preci-
+ sion, a fourth <STRONG>double</STRONG> argument constraining minimum
+ value, and a fifth <STRONG>double</STRONG> 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 or equal
- the minimum value, the range is simply ignored. On
- return the field buffer is formatted according to the
- <B>printf</B> format specification ".*f", where the '*' is
- replaced by the precision argument. For details of
- the precision handling see <B>printf's</B> man-page.
+ 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's</STRONG>
+ man-page.
TYPE_REGEXP
- Regular expression data. Requires a regular expres-
- sion <B>(char</B> <B>*)</B> third argument; the data is valid if
- the regular expression matches it. Regular expres-
- sions are in the format of <B><A HREF="regcomp.3x.html">regcomp(3x)</A></B> and
- <B><A HREF="regexec.3x.html">regexec(3x)</A></B>. Please notice that the regular expres-
- sion must match the whole field. If you have for
- example an eight character wide field, a regular
- expression "^[0-9]*$" always means that you have to
- fill all eight positions with digits. If you want to
- allow fewer digits, you may use for example "^[0-9]*
+ Regular expression data. Requires a regular expres-
+ sion <STRONG>(char</STRONG> <STRONG>*)</STRONG> third argument; the data is valid if
+ the regular expression matches it. Regular expres-
+ sions are in the format of <STRONG><A HREF="regcomp.3x.html">regcomp(3x)</A></STRONG> and
+ <STRONG><A HREF="regexec.3x.html">regexec(3x)</A></STRONG>. Please notice that the regular expres-
+ sion must match the whole field. If you have for
+ example an eight character wide field, a regular
+ expression "^[0-9]*$" 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
+ 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 additional argument. It is checked whether or not
- the buffer has the form a.b.c.d, where a,b,c and d
+ 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 vali-
+ buffer are ignored. The address itself is not vali-
dated. Please note that this is an ncurses extension.
- This field type may not be available in other curses
+ This field type may not be available in other curses
implementations.
- It is possible to set up new programmer-defined field
- types. See the <B><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></B> manual page.
+ 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>RETURN VALUE</H2><PRE>
- The functions <B>field_type</B> and <B>field_arg</B> return <B>NULL</B> on
- error. The function <B>set_field_type</B> returns one of the fol-
+ The functions <STRONG>field_type</STRONG> and <STRONG>field_arg</STRONG> return <STRONG>NULL</STRONG> on
+ error. The function <STRONG>set_field_type</STRONG> returns one of the fol-
lowing:
- <B>E_OK</B> The routine succeeded.
+ <STRONG>E_OK</STRONG> The routine succeeded.
- <B>E_SYSTEM_ERROR</B>
- System error occurred (see <B>errno</B>).
+ <STRONG>E_SYSTEM_ERROR</STRONG>
+ System error occurred (see <STRONG>errno</STRONG>).
</PRE>
<H2>SEE ALSO</H2><PRE>
- <B><A HREF="ncurses.3x.html">curses(3x)</A></B>, <B><A HREF="form.3x.html">form(3x)</A></B>.
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>.
</PRE>
<H2>NOTES</H2><PRE>
- The header file <B><form.h></B> automatically includes the header
- file <B><curses.h></B>.
+ The header file <STRONG><form.h></STRONG> automatically includes the header
+ file <STRONG><curses.h></STRONG>.
</PRE>
<H2>PORTABILITY</H2><PRE>
- These routines emulate the System V forms library. They
+ These routines emulate the System V forms library. They
were not supported on Version 7 or BSD versions.
</PRE>
<H2>AUTHORS</H2><PRE>
- Juergen Pfeifer. Manual pages and adaptation for new
+ Juergen Pfeifer. Manual pages and adaptation for new
curses by Eric S. Raymond.
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+ <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>
</PRE>
<HR>
<ADDRESS>
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