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- * @Id: form_field_validation.3x,v 1.33 2020/12/12 19:57:55 tom Exp @
+ * @Id: form_field_validation.3x,v 1.53 2024/03/16 15:35:01 tom Exp @
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-<H1 class="no-header">form_field_validation 3X</H1>
+<H1 class="no-header">form_field_validation 3x 2024-03-16 ncurses 6.4 Library calls</H1>
<PRE>
-<B><A HREF="form_field_validation.3X.html">form_field_validation(3X)</A></B> <B><A HREF="form_field_validation.3X.html">form_field_validation(3X)</A></B>
+<STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG> Library calls <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
- <B>form_field_validation</B> - data type validation for fields
+ <STRONG>form_field_validation</STRONG> - data type validation for fields
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
- <B>#include</B> <B><form.h></B>
+ <STRONG>#include</STRONG> <STRONG><form.h></STRONG>
- <B>void</B> <B>*field_arg(const</B> <B>FIELD</B> <B>*</B><I>field</I><B>);</B>
- <B>FIELDTYPE</B> <B>*field_type(const</B> <B>FIELD</B> <B>*</B><I>field</I><B>);</B>
- <B>int</B> <B>set_field_type(FIELD</B> <B>*</B><I>field</I><B>,</B> <B>FIELDTYPE</B> <B>*</B><I>type</I><B>,</B> <B>...);</B>
+ <STRONG>void</STRONG> <STRONG>*field_arg(const</STRONG> <STRONG>FIELD</STRONG> <STRONG>*</STRONG><EM>field</EM><STRONG>);</STRONG>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*field_type(const</STRONG> <STRONG>FIELD</STRONG> <STRONG>*</STRONG><EM>field</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>set_field_type(FIELD</STRONG> <STRONG>*</STRONG><EM>field</EM><STRONG>,</STRONG> <STRONG>FIELDTYPE</STRONG> <STRONG>*</STRONG><EM>type</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
- /* predefined field types */
- <B>FIELDTYPE</B> <B>*TYPE_ALNUM;</B>
- <B>FIELDTYPE</B> <B>*TYPE_ALPHA;</B>
- <B>FIELDTYPE</B> <B>*TYPE_ENUM;</B>
- <B>FIELDTYPE</B> <B>*TYPE_INTEGER;</B>
- <B>FIELDTYPE</B> <B>*TYPE_NUMERIC;</B>
- <B>FIELDTYPE</B> <B>*TYPE_REGEXP;</B>
- <B>FIELDTYPE</B> <B>*TYPE_IPV4;</B>
+ <EM>/*</EM> <EM>predefined</EM> <EM>field</EM> <EM>types</EM> <EM>*/</EM>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*TYPE_ALNUM;</STRONG>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*TYPE_ALPHA;</STRONG>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*TYPE_ENUM;</STRONG>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*TYPE_INTEGER;</STRONG>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*TYPE_NUMERIC;</STRONG>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*TYPE_REGEXP;</STRONG>
+ <STRONG>FIELDTYPE</STRONG> <STRONG>*TYPE_IPV4;</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
By default, no validation is done on form fields. You can associate a
- form with with a <I>field</I> <I>type</I>, making the form library validate input.
+ form with with a <EM>field</EM> <EM>type</EM>, making the form library validate input.
</PRE><H3><a name="h3-field_arg">field_arg</a></H3><PRE>
- Returns a pointer to the field's argument block. The <I>argument</I> <I>block</I> is
+ Returns a pointer to the field's argument block. The <EM>argument</EM> <EM>block</EM> is
an opaque structure containing a copy of the arguments provided in a
- <B>set_field_type</B> call.
+ <STRONG>set_field_type</STRONG> call.
</PRE><H3><a name="h3-field_type">field_type</a></H3><PRE>
- Returns a pointer to the <I>field</I> <I>type</I> associated with the form field,
- i.e., by calling <B>set_field_type</B>.
+ Returns a pointer to the <EM>field</EM> <EM>type</EM> associated with the form field,
+ i.e., by calling <STRONG>set_field_type</STRONG>.
</PRE><H3><a name="h3-set_field_type">set_field_type</a></H3><PRE>
- The function <B>set_field_type</B> associates a field type with a given form
+ The function <STRONG>set_field_type</STRONG> associates a field type with a given form
field. This is the type checked by validation functions. Most field
types are configurable, via arguments which the caller provides when
- calling <B>set_field_type</B>.
+ calling <STRONG>set_field_type</STRONG>.
Several field types are predefined by the form library.
-</PRE><H3><a name="h3-Predefined-types">Predefined types</a></H3><PRE>
+</PRE><H2><a name="h2-PREDEFINED-TYPES">PREDEFINED TYPES</a></H2><PRE>
It is possible to set up new programmer-defined field types. Field
- types are implemented via the <B>FIELDTYPE</B> data structure, which contains
+ types are implemented via the <STRONG>FIELDTYPE</STRONG> data structure, which contains
several pointers to functions.
- See the <B><A HREF="form_fieldtype.3X.html">form_fieldtype(3X)</A></B> manual page, which describes functions which
+ See the <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG> manual page, which describes functions which
can be used to construct a field-type dynamically.
The predefined types are as follows:
- TYPE_ALNUM
- Alphanumeric data. Required parameter:
- <B>o</B> a third <B>int</B> argument, a minimum field width.
+</PRE><H3><a name="h3-TYPE_ALNUM">TYPE_ALNUM</a></H3><PRE>
+ Alphanumeric data. Required parameter:
- TYPE_ALPHA
- Character data. Required parameter:
+ <STRONG>o</STRONG> a third <STRONG>int</STRONG> argument, a minimum field width.
- <B>o</B> a third <B>int</B> argument, a minimum field width.
- TYPE_ENUM
- Accept one of a specified set of strings. Required parameters:
+</PRE><H3><a name="h3-TYPE_ALPHA">TYPE_ALPHA</a></H3><PRE>
+ Character data. Required parameter:
- <B>o</B> a third <B>(char</B> <B>**)</B> argument pointing to a string list;
+ <STRONG>o</STRONG> a third <STRONG>int</STRONG> argument, a minimum field width.
- <B>o</B> a fourth <B>int</B> flag argument to enable case-sensitivity;
- <B>o</B> a fifth <B>int</B> 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.
+</PRE><H3><a name="h3-TYPE_ENUM">TYPE_ENUM</a></H3><PRE>
+ Accept one of a specified set of strings. Required parameters:
- The library copies the string list, so you may use a list that
- lives in automatic variables on the stack.
+ <STRONG>o</STRONG> a third <STRONG>(char</STRONG> <STRONG>**)</STRONG> argument pointing to a string list;
- TYPE_INTEGER
- Integer data, parsable to an integer by <B>atoi(3)</B>. Required
- parameters:
+ <STRONG>o</STRONG> a fourth <STRONG>int</STRONG> flag argument to enable case-sensitivity;
- <B>o</B> a third <B>int</B> argument controlling the precision,
+ <STRONG>o</STRONG> 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.
- <B>o</B> a fourth <B>long</B> argument constraining minimum value,
+ The library copies the string list, so you may use a list that lives in
+ automatic variables on the stack.
- <B>o</B> a fifth <B>long</B> 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 <B>printf</B>
- format specification ".*ld", where the "*" is replaced by the
- precision argument.
+</PRE><H3><a name="h3-TYPE_INTEGER">TYPE_INTEGER</a></H3><PRE>
+ Integer data, parsable to an integer by <STRONG>atoi(3)</STRONG>. Required parameters:
- For details of the precision handling see <B>printf(3)</B>.
+ <STRONG>o</STRONG> a third <STRONG>int</STRONG> argument controlling the precision,
- TYPE_NUMERIC
- Numeric data (may have a decimal-point part). Required
- parameters:
+ <STRONG>o</STRONG> a fourth <STRONG>long</STRONG> argument constraining minimum value,
- <B>o</B> a third <B>int</B> argument controlling the precision,
+ <STRONG>o</STRONG> 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.
- <B>o</B> a fourth <B>double</B> argument constraining minimum value,
+ On return, the field buffer is formatted according to the <STRONG>printf</STRONG> format
+ specification ".*ld", where the "*" is replaced by the precision
+ argument.
- <B>o</B> and a fifth <B>double</B> 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.
+ For details of the precision handling see <STRONG>printf(3)</STRONG>.
- 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(3)</B>.
+</PRE><H3><a name="h3-TYPE_NUMERIC">TYPE_NUMERIC</a></H3><PRE>
+ Numeric data (may have a decimal-point part). Required parameters:
- TYPE_REGEXP
- Regular expression data. Required parameter:
+ <STRONG>o</STRONG> a third <STRONG>int</STRONG> argument controlling the precision,
- <B>o</B> a third argument, a regular expression <B>(char</B> <B>*)</B> string. The
- data is valid if the regular expression matches it.
+ <STRONG>o</STRONG> a fourth <STRONG>double</STRONG> argument constraining minimum value,
- Regular expressions are in the format of <B>regcomp</B> and <B>regexec</B>.
+ <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.
- 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]* *$" which is good for leading and
- trailing spaces around the digits.
+ On return, the field buffer is formatted according to the <STRONG>printf</STRONG> format
+ specification ".*f", where the "*" is replaced by the precision
+ argument.
- TYPE_IPV4
- An Internet Protocol Version 4 address. Required parameter:
+ For details of the precision handling see <STRONG>printf(3)</STRONG>.
- <B>o</B> none
- The form library checks whether or not the buffer has the form
- <I>a.b.c.d</I>, where <I>a</I>, <I>b</I>, <I>c</I>, and <I>d</I> are numbers in the range 0 to 255.
- Trailing blanks in the buffer are ignored. The address itself is
- not validated.
+</PRE><H3><a name="h3-TYPE_REGEXP">TYPE_REGEXP</a></H3><PRE>
+ Regular expression data. Required parameter:
- This is an ncurses extension; this field type may not be available
- in other curses implementations.
+ <STRONG>o</STRONG> a third argument, a regular expression <STRONG>(char</STRONG> <STRONG>*)</STRONG> string. The data
+ is valid if the regular expression matches it.
+ Regular expressions are in the format of <STRONG>regcomp</STRONG> and <STRONG>regexec</STRONG>.
-</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- The functions <B>field_type</B> and <B>field_arg</B> return <B>NULL</B> on error. The
- function <B>set_field_type</B> returns one of the following:
+ The regular expression must match the whole field. If you have for
+ example, an eight character wide field, a regular expression "^[0-9]*$"
+ 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.
- <B>E_OK</B> The routine succeeded.
- <B>E_SYSTEM_ERROR</B>
- System error occurred (see <B>errno(3)</B>).
+</PRE><H3><a name="h3-TYPE_IPV4">TYPE_IPV4</a></H3><PRE>
+ An Internet Protocol Version 4 address. Required parameter:
+ <STRONG>o</STRONG> none
-</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <B><A HREF="curses.3X.html">curses(3X)</A></B>, <B><A HREF="form.3X.html">form(3X)</A></B>, <B><A HREF="form_fieldtype.3X.html">form_fieldtype(3X)</A></B>, <B><A HREF="form_variables.3X.html">form_variables(3X)</A></B>.
+ The form library checks whether or not the buffer has the form <EM>a.b.c.d</EM>,
+ where <EM>a</EM>, <EM>b</EM>, <EM>c</EM>, and <EM>d</EM> are numbers in the range 0 to 255. Trailing
+ blanks in the buffer are ignored. The address itself is not validated.
+
+ This is an <EM>ncurses</EM> extension; this field type may not be available in
+ other curses implementations.
-</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- The header file <B><form.h></B> automatically includes the header file
- <B><curses.h></B>.
+</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
+ function <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(3)</STRONG>).
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
Raymond.
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>, <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>, <STRONG><A HREF="form_variables.3x.html">form_variables(3x)</A></STRONG>
- <B><A HREF="form_field_validation.3X.html">form_field_validation(3X)</A></B>
+
+
+ncurses 6.4 2024-03-16 <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
<li><a href="#h3-field_arg">field_arg</a></li>
<li><a href="#h3-field_type">field_type</a></li>
<li><a href="#h3-set_field_type">set_field_type</a></li>
-<li><a href="#h3-Predefined-types">Predefined types</a></li>
+</ul>
+</li>
+<li><a href="#h2-PREDEFINED-TYPES">PREDEFINED TYPES</a>
+<ul>
+<li><a href="#h3-TYPE_ALNUM">TYPE_ALNUM</a></li>
+<li><a href="#h3-TYPE_ALPHA">TYPE_ALPHA</a></li>
+<li><a href="#h3-TYPE_ENUM">TYPE_ENUM</a></li>
+<li><a href="#h3-TYPE_INTEGER">TYPE_INTEGER</a></li>
+<li><a href="#h3-TYPE_NUMERIC">TYPE_NUMERIC</a></li>
+<li><a href="#h3-TYPE_REGEXP">TYPE_REGEXP</a></li>
+<li><a href="#h3-TYPE_IPV4">TYPE_IPV4</a></li>
</ul>
</li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
-<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
-<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-AUTHORS">AUTHORS</a></li>
+<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
</div>
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