X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=man%2Fform_field_buffer.3x;h=566072f55ddb29f021ff716a26258a1800089605;hp=cac6a088e5ed4581c75bcb6934d704e5dde7d625;hb=ce7b402c144d2b6d3773ef5b42aad9daf1ad76fe;hpb=027ae42953e3186daed8f3882da73de48291b606 diff --git a/man/form_field_buffer.3x b/man/form_field_buffer.3x index cac6a088..566072f5 100644 --- a/man/form_field_buffer.3x +++ b/man/form_field_buffer.3x @@ -1,6 +1,6 @@ '\" t .\"*************************************************************************** -.\" Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. * +.\" Copyright (c) 1998-2006,2008 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 * @@ -27,7 +27,7 @@ .\" authorization. * .\"*************************************************************************** .\" -.\" $Id: form_field_buffer.3x,v 1.14 2006/11/04 17:12:00 tom Exp $ +.\" $Id: form_field_buffer.3x,v 1.15 2008/10/18 18:35:17 tom Exp $ .TH form_field_buffer 3X "" .SH NAME \fBform_field_buffer\fR - field buffer control @@ -46,17 +46,47 @@ int set_max_field(FIELD *field, int max); .br .SH DESCRIPTION The function \fBset_field_buffer\fR sets the numbered buffer of the given field -to contain a given string. Buffer 0 is the displayed value of the field; other -numbered buffers may be allocated by applications through the \fBnbuf\fR -argument of (see \fBform_field_new\fR(3X)) but are not manipulated by the forms -library. The function \fBfield_buffer\fR returns the address of the buffer. -Please note that this buffer has always the length of the buffer, that means -that it may typically contain trailing spaces. If you entered leading spaces -the buffer may also contain them. If you want the raw data, you must write your +to contain a given string: +.RS 3 +.TP 3 +- +Buffer 0 is the displayed value of the field. +.TP 3 +- +Other numbered buffers may be allocated by applications through the \fBnbuf\fR +argument of (see \fBform_field_new\fR(3X)) +but are not manipulated by the forms library. +.RE +.PP +The function \fBfield_buffer\fR returns a pointer to +the contents of the given numbered buffer: +.RS 3 +.TP 3 +- +The buffer contents always have the same length, +and are padded with trailing spaces +as needed to ensure this length is the same. +.TP 3 +- +The buffer may contain leading spaces, depending on how it was set. +.TP 3 +- +The buffer contents are set with \fBset_field_buffer\fP, +or as a side effect of any editing operations on the corresponding field. +.TP 3 +- +Editing operations are based on the \fIwindow\fP which displays the field, +rather than a \fIstring\fP. +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. Please note also, that subsequent operations on the form -will probably change the content of the buffer. So do not use it for long term -storage of the entered form data. +and trailing spaces. +.TP 3 +- +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. +.RE .PP The function \fBset_field_status\fR sets the associated status flag of \fIfield\fR; \fBfield_status\fR gets the current value. The status flag