XmTextGetSubstring(3)

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)

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