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- * @Id: form_field_buffer.3x,v 1.19 2010/12/04 18:38:55 tom Exp @
+ * @Id: form_field_buffer.3x,v 1.27 2020/10/24 09:27:17 tom Exp @
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-<H1>form_field_buffer 3x</H1>
-<HR>
+<H1 class="no-header">form_field_buffer 3X</H1>
<PRE>
-<STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG> <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>
+<B><A HREF="form_field_buffer.3X.html">form_field_buffer(3X)</A></B> <B><A HREF="form_field_buffer.3X.html">form_field_buffer(3X)</A></B>
-</PRE>
-<H2><a name="h2-NAME">NAME</a></H2><PRE>
- <STRONG>form_field_buffer</STRONG> - field buffer control
+</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
+ <B>form_field_buffer</B> - field buffer control
-</PRE>
-<H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
- <STRONG>#include</STRONG> <STRONG><form.h></STRONG>
+</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
+ <B>#include</B> <B><form.h></B>
- int set_field_buffer(FIELD *field, int buf, const char
- *value);
- char *field_buffer(const FIELD *field, int buffer);
- int set_field_status(FIELD *field, bool status);
- bool field_status(const FIELD *field);
- int set_max_field(FIELD *field, int max);
+ <B>int</B> <B>set_field_buffer(FIELD</B> <B>*</B><I>field</I><B>,</B> <B>int</B> <I>buf</I><B>,</B> <B>const</B> <B>char</B> <B>*</B><I>value</I><B>);</B>
+ <B>char</B> <B>*field_buffer(const</B> <B>FIELD</B> <B>*</B><I>field</I><B>,</B> <B>int</B> <I>buffer</I><B>);</B>
+ <B>int</B> <B>set_field_status(FIELD</B> <B>*</B><I>field</I><B>,</B> <B>bool</B> <I>status</I><B>);</B>
+ <B>bool</B> <B>field_status(const</B> <B>FIELD</B> <B>*</B><I>field</I><B>);</B>
-</PRE>
-<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
- The function <STRONG>set_field_buffer</STRONG> sets the numbered buffer of
- the given field to contain a given string:
+ <B>int</B> <B>set_max_field(FIELD</B> <B>*</B><I>field</I><B>,</B> <B>int</B> <I>max</I><B>);</B>
- <STRONG>o</STRONG> Buffer 0 is the displayed value of the field.
- <STRONG>o</STRONG> Other numbered buffers may be allocated by applica-
- tions through the <STRONG>nbuf</STRONG> argument of (see
- <STRONG><A HREF="form_field_new.3x.html">form_field_new(3x)</A></STRONG>) but are not manipulated by the
- forms library.
+</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
+ The function <B>set_field_buffer</B> sets the numbered buffer of the given
+ field to contain a given string:
- The function <STRONG>field_buffer</STRONG> returns a pointer to the con-
- tents of the given numbered buffer:
+ <B>o</B> Buffer 0 is the displayed value of the field.
- <STRONG>o</STRONG> The buffer contents always have the same length,
- and are padded with trailing spaces as needed to
- ensure this length is the same.
+ <B>o</B> Other numbered buffers may be allocated by applications through
+ the <B>nbuf</B> argument of (see <B><A HREF="form_field_new.3X.html">form_field_new(3X)</A></B>) but are not
+ manipulated by the forms library.
- <STRONG>o</STRONG> The buffer may contain leading spaces, depending on
- how it was set.
+ The function <B>field_buffer</B> returns a pointer to the contents of the
+ given numbered buffer:
- <STRONG>o</STRONG> The buffer contents are set with <STRONG>set_field_buffer</STRONG>,
- or as a side effect of any editing operations on
- the corresponding field.
+ <B>o</B> The buffer contents always have the same length, and are padded
+ with trailing spaces as needed to ensure this length is the
+ same.
- <STRONG>o</STRONG> Editing operations are based on the <EM>window</EM> which
- displays the field, rather than a <EM>string</EM>. The win-
- dow contains only printable characters, and is
- filled with blanks. If you want the raw data, you
- must write your own routine that copies the value
- out of the buffer and removes the leading and
- trailing spaces.
+ <B>o</B> The buffer may contain leading spaces, depending on how it was
+ set.
- <STRONG>o</STRONG> Because editing operations change the content of
- the buffer to correspond to the window, you should
- not rely on using buffers for long-term storage of
- form data.
+ <B>o</B> The buffer contents are set with <B>set_field_buffer</B>, or as a side
+ effect of any editing operations on the corresponding field.
- The function <STRONG>set_field_status</STRONG> sets the associated status
- flag of <EM>field</EM>; <STRONG>field_status</STRONG> gets the current value. The
- status flag is set to a nonzero value whenever the field
- changes.
+ <B>o</B> Editing operations are based on the <I>window</I> which displays the
+ field, rather than a <I>string</I>. The window contains only printable
+ characters, and is filled with blanks. If you want the raw
+ data, you must write your own routine that copies the value out
+ of the buffer and removes the leading and trailing spaces.
- The function <STRONG>set_max_field</STRONG> sets the maximum size for a
- dynamic field. An argument of 0 turns off any maximum
- size threshold for that field.
+ <B>o</B> Because editing operations change the content of the buffer to
+ correspond to the window, you should not rely on using buffers
+ for long-term storage of form data.
+ The function <B>set_field_status</B> sets the associated status flag of <I>field</I>;
+ <B>field_status</B> gets the current value. The status flag is set to a
+ nonzero value whenever the field changes.
-</PRE>
-<H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- The <STRONG>field_buffer</STRONG> function returns NULL on error. It sets
- errno according to their success:
+ The function <B>set_max_field</B> sets the maximum size for a dynamic field.
+ An argument of 0 turns off any maximum size threshold for that field.
+
+
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
+ The <B>field_buffer</B> function returns NULL on error. It sets <B>errno</B>
+ according to their success:
- <STRONG>E_OK</STRONG> The routine succeeded.
+ <B>E_OK</B> The routine succeeded.
- <STRONG>E_BAD_ARGUMENT</STRONG>
- Routine detected an incorrect or out-of-range argu-
- ment.
+ <B>E_BAD_ARGUMENT</B>
+ Routine detected an incorrect or out-of-range argument.
- The <STRONG>field_status</STRONG> function returns <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>.
+ The <B>field_status</B> function returns <B>TRUE</B> or <B>FALSE</B>.
The remaining routines return one of the following:
- <STRONG>E_OK</STRONG> The routine succeeded.
+ <B>E_OK</B> The routine succeeded.
- <STRONG>E_SYSTEM_ERROR</STRONG>
- System error occurred (see <STRONG>errno</STRONG>).
+ <B>E_SYSTEM_ERROR</B>
+ System error occurred (see <B>errno(3)</B>).
- <STRONG>E_BAD_ARGUMENT</STRONG>
- Routine detected an incorrect or out-of-range argu-
- ment.
+ <B>E_BAD_ARGUMENT</B>
+ Routine detected an incorrect or out-of-range argument.
-</PRE>
-<H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG> and related pages whose names begin "form_" for
- detailed descriptions of the entry points.
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <B><A HREF="curses.3X.html">curses(3X)</A></B> and related pages whose names begin "form_" for detailed
+ descriptions of the entry points.
-</PRE>
-<H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- The header file <STRONG><form.h></STRONG> automatically includes the header
- file
+</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+ The header file <B><form.h></B> automatically includes the header file
- When configured for wide characters, <STRONG>field_buffer</STRONG> returns
- a pointer to temporary storage (allocated and freed by the
- library). The application should not attempt to modify
- the data. It will be freed on the next call to <STRONG>field_buf-</STRONG>
- <STRONG>fer</STRONG> to return the same buffer. <STRONG><curses.h></STRONG>.
+ When configured for wide characters, <B>field_buffer</B> returns a pointer to
+ temporary storage (allocated and freed by the library). The
+ application should not attempt to modify the data. It will be freed on
+ the next call to <B>field_buffer</B> to return the same buffer. <B><curses.h></B>.
-</PRE>
-<H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- These routines emulate the System V forms library. They
- were not supported on Version 7 or BSD versions.
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+ These routines emulate the System V forms library. They were not
+ supported on Version 7 or BSD versions.
+ The <B>set_max_field</B> function checks for an ncurses extension
+ <B>O_INPUT_FIELD</B> which allows a dynamic field to shrink if the new limit
+ is smaller than the current field size.
-</PRE>
-<H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
- Juergen Pfeifer. Manual pages and adaptation for new
- curses by Eric S. Raymond.
+
+<
/PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
+ Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S.
+ Raymond.
- <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>
+ <B><A HREF="form_field_buffer.3X.html">form_field_buffer(3X)</A></B>
</PRE>
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