41 static int midibuf_is_empty(struct midi_buffer *this)  in midibuf_is_empty()  argument
43 	return (this->pos_read == this->pos_write) && !this->full;  in midibuf_is_empty()
46 static int midibuf_is_full(struct midi_buffer *this)  in midibuf_is_full()  argument
48 	return this->full;  in midibuf_is_full()
51 void line6_midibuf_reset(struct midi_buffer *this)  in line6_midibuf_reset()  argument
53 	this->pos_read = this->pos_write = this->full = 0;  in line6_midibuf_reset()
54 	this->command_prev = -1;  in line6_midibuf_reset()
57 int line6_midibuf_init(struct midi_buffer *this, int size, int split)  in line6_midibuf_init()  argument
59 	this->buf = kmalloc(size, GFP_KERNEL);  in line6_midibuf_init()
61 	if (this->buf == NULL)  in line6_midibuf_init()
64 	this->size = size;  in line6_midibuf_init()
65 	this->split = split;  in line6_midibuf_init()
66 	line6_midibuf_reset(this);  in line6_midibuf_init()
70 int line6_midibuf_bytes_free(struct midi_buffer *this)  in line6_midibuf_bytes_free()  argument
73 	    midibuf_is_full(this) ?  in line6_midibuf_bytes_free()
75 	    (this->pos_read - this->pos_write + this->size - 1) % this->size +  in line6_midibuf_bytes_free()
79 int line6_midibuf_bytes_used(struct midi_buffer *this)  in line6_midibuf_bytes_used()  argument
82 	    midibuf_is_empty(this) ?  in line6_midibuf_bytes_used()
84 	    (this->pos_write - this->pos_read + this->size - 1) % this->size +  in line6_midibuf_bytes_used()
88 int line6_midibuf_write(struct midi_buffer *this, unsigned char *data,  in line6_midibuf_write()  argument
95 	if (midibuf_is_full(this) || (length <= 0))  in line6_midibuf_write()
104 	bytes_free = line6_midibuf_bytes_free(this);  in line6_midibuf_write()
110 		length1 = this->size - this->pos_write;  in line6_midibuf_write()
114 			memcpy(this->buf + this->pos_write, data, length);  in line6_midibuf_write()
115 			this->pos_write += length;  in line6_midibuf_write()
119 			memcpy(this->buf + this->pos_write, data, length1);  in line6_midibuf_write()
120 			memcpy(this->buf, data + length1, length2);  in line6_midibuf_write()
121 			this->pos_write = length2;  in line6_midibuf_write()
124 		if (this->pos_write == this->pos_read)  in line6_midibuf_write()
125 			this->full = 1;  in line6_midibuf_write()
131 int line6_midibuf_read(struct midi_buffer *this, unsigned char *data,  in line6_midibuf_read()  argument
145 	if (midibuf_is_empty(this))  in line6_midibuf_read()
148 	bytes_used = line6_midibuf_bytes_used(this);  in line6_midibuf_read()
153 	length1 = this->size - this->pos_read;  in line6_midibuf_read()
156 	command = this->buf[this->pos_read];  in line6_midibuf_read()
160 		this->command_prev = command;  in line6_midibuf_read()
162 		if (this->command_prev > 0) {  in line6_midibuf_read()
164 			    midibuf_message_length(this->command_prev);  in line6_midibuf_read()
180 				if (this->buf[this->pos_read + i] & 0x80)  in line6_midibuf_read()
189 				if (this->buf[this->pos_read + i] & 0x80)  in line6_midibuf_read()
196 					if (this->buf[i] & 0x80)  in line6_midibuf_read()
208 		if (!this->split)  in line6_midibuf_read()
219 		memcpy(data + repeat, this->buf + this->pos_read, length);  in line6_midibuf_read()
220 		this->pos_read += length;  in line6_midibuf_read()
224 		memcpy(data + repeat, this->buf + this->pos_read, length1);  in line6_midibuf_read()
225 		memcpy(data + repeat + length1, this->buf, length2);  in line6_midibuf_read()
226 		this->pos_read = length2;  in line6_midibuf_read()
230 		data[0] = this->command_prev;  in line6_midibuf_read()
232 	this->full = 0;  in line6_midibuf_read()
236 int line6_midibuf_ignore(struct midi_buffer *this, int length)  in line6_midibuf_ignore()  argument
238 	int bytes_used = line6_midibuf_bytes_used(this);  in line6_midibuf_ignore()
243 	this->pos_read = (this->pos_read + length) % this->size;  in line6_midibuf_ignore()
244 	this->full = 0;  in line6_midibuf_ignore()
248 void line6_midibuf_destroy(struct midi_buffer *this)  in line6_midibuf_destroy()  argument
250 	kfree(this->buf);  in line6_midibuf_destroy()
251 	this->buf = NULL;  in line6_midibuf_destroy()