XmTextFieldGetSubstring(3X)XmTextFieldGetSubstring(3X)NAMEXmTextFieldGetSubstring — A TextField function that retrieves a copy of
a portion of the internal text buffer
SYNOPSIS
#include <Xm/TextF.h>
int XmTextFieldGetSubstring (widget, start, num_chars, buffer_size,
buffer) Widget widget; XmTextPositionstart;
int num_chars; int buffer_size;
char *buffer;
VERSION
This page documents version 1.2 of the Motif library.
DESCRIPTIONXmTextFieldGetSubstring retrieves a copy of a portion of the internal
text buffer of a TextField 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 con‐
tain the substring to be copied and a NULL terminator. Use the follow‐
ing equation to calculate the size of buffer the application should
provide:
buffer_size = (num_chars * MB_CUR_MAX) + 1 Specifies the TextField wid‐
get ID. 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.
Specifies the number of characters to be copied into the provided buf‐
fer. Specifies the size of the supplied buffer in bytes. This size
should account for a NULL terminator. Specifies the character buffer
into which the internal text buffer will be copied.
For a complete definition of TextField and its associated resources,
see XmTextField(3X).
RETURN VALUE
The function was successful. 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 unde‐
fined. 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 INFORMATIONXmTextField(3X) and XmTextFieldGetSubstringWcs(3X).
XmTextFieldGetSubstring(3X)