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| * @Id: form_field_buffer.3x,v 1.14 2006/11/04 17:12:00 tom Exp @ |
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| <TITLE>form_field_buffer 3x</TITLE> |
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| <H1>form_field_buffer 3x</H1> |
| <HR> |
| <PRE> |
| <!-- Manpage converted by man2html 3.0.1 --> |
| <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> |
| |
| |
| |
| |
| </PRE> |
| <H2>NAME</H2><PRE> |
| <STRONG>form_field_buffer</STRONG> - field buffer control |
| |
| |
| </PRE> |
| <H2>SYNOPSIS</H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><form.h></STRONG> |
| 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); |
| |
| |
| </PRE> |
| <H2>DESCRIPTION</H2><PRE> |
| The function <STRONG>set_field_buffer</STRONG> 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 <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. The function <STRONG>field_buffer</STRONG> 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 own routine that copies the |
| value out of the buffer and removes the leading and trail- |
| ing 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. |
| |
| 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. |
| |
| 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. |
| |
| |
| </PRE> |
| <H2>RETURN VALUE</H2><PRE> |
| The <STRONG>field_buffer</STRONG> function returns NULL on error. It sets |
| errno according to their success: |
| |
| <STRONG>E_OK</STRONG> The routine succeeded. |
| |
| <STRONG>E_BAD_ARGUMENT</STRONG> |
| Routine detected an incorrect or out-of-range argu- |
| ment. |
| |
| The <STRONG>field_status</STRONG> function returns <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>. |
| |
| The remaining routines return one of the following: |
| |
| <STRONG>E_OK</STRONG> The routine succeeded. |
| |
| <STRONG>E_SYSTEM_ERROR</STRONG> |
| System error occurred (see <STRONG>errno</STRONG>). |
| |
| <STRONG>E_BAD_ARGUMENT</STRONG> |
| Routine detected an incorrect or out-of-range argu- |
| ment. |
| |
| |
| </PRE> |
| <H2>SEE ALSO</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>NOTES</H2><PRE> |
| The header file <STRONG><form.h></STRONG> 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_buffer</STRONG> to return the same buffer. <STRONG><curses.h></STRONG>. |
| |
| |
| </PRE> |
| <H2>PORTABILITY</H2><PRE> |
| 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 |
| curses by Eric S. Raymond. |
| |
| |
| |
| <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG> |
| </PRE> |
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