snd_rawmidi_transmit_peek(9) [centos man page]

SND_RAWMIDI_TRANSMIT(9) 					     MIDI API						   SND_RAWMIDI_TRANSMIT(9)

NAME

       snd_rawmidi_transmit_peek - copy data from the internal buffer

SYNOPSIS

       int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream * substream, unsigned char * buffer, int count);

ARGUMENTS

       substream
	   the rawmidi substream

       buffer
	   the buffer pointer

       count
	   data size to transfer

DESCRIPTION

       Copies data from the internal output buffer to the given buffer.

       Call this in the interrupt handler when the midi output is ready, and call snd_rawmidi_transmit_ack after the transmission is finished.

RETURN

       The size of copied data, or a negative error code on failure.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   SND_RAWMIDI_TRANSMIT(9)

XmTextFieldGetSubstring(library call)									     XmTextFieldGetSubstring(library call)

NAME

       XmTextFieldGetSubstring -- A TextField function that retrieves a copy of a portion of the internal text buffer

SYNOPSIS

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

DESCRIPTION

       XmTextFieldGetSubstring	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 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 TextField 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 TextField and its associated resources, see XmTextField(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

       XmTextField(3) and XmTextFieldGetSubstringWcs(3).

													     XmTextFieldGetSubstring(library call)