NAME

       XmTextGetSubstring  —  A  Text  function  that  retrieves a copy of a portion of the internal text buffer
       "XmTextGetSubstring" "Text functions" "XmTextGetSubstring"

SYNOPSIS

       #include <Xm/Text.h>
       int XmTextGetSubstring(
       Widget widget,
       XmTextPosition start,
       int num_chars,
       int buffer_size,
       char *buffer);

DESCRIPTION

       XmTextGetSubstring retrieves a copy of a portion of the internal  text  buffer  of  a  Text  widget.  The
       function  copies a specified number of characters from a given start position in the internal text buffer
       into a buffer provided by the application. A NULL terminator is placed at the end of the copied data.

       The size of the required buffer depends on the maximum number of bytes per character (MB_CUR_MAX) for the
       current locale.  MB_CUR_MAX is a macro defined in stdlib.h. The buffer should be large enough to  contain
       the  substring  to  be  copied and a NULL terminator. Use the following equation to calculate the size of
       buffer the application should provide:

       buffer_size = (num_chars* MB_CUR_MAX) + 1
       (void)

       widget    Specifies the Text widget ID.

       start     Specifies the beginning character position from which the data will be retrieved.  This  is  an
                 integer  number  of  characters  from  the  beginning  of  the text buffer. The first character
                 position is 0 (zero).

       num_chars Specifies the number of characters to be copied into the provided buffer.

       buffer_size
                 Specifies the size of the supplied buffer in  bytes.  This  size  should  account  for  a  NULL
                 terminator.

       buffer    Specifies the character buffer into which the internal text buffer will be copied.

       For a complete definition of Text and its associated resources, see XmText(3).

RETURN

       XmCOPY_SUCCEEDED
                 The function was successful.

       XmCOPY_FAILED
                 The  function  failed because it was unable to copy the specified number of characters into the
                 buffer provided.  The buffer size may be insufficient. The contents of buffer are undefined.

       XmCOPY_TRUNCATED
                 The requested number of characters extended beyond the internal  buffer.  The  function  copied
                 characters  between  start  and the end of the widget's buffer and terminated the string with a
                 NULL terminator; fewer than num_chars characters were copied.

RELATED

       XmText(3) and XmTextGetSubstringWcs(3).

                                                                                           XmTextGetSubstring(3)