33 static int midibuf_is_empty(struct midi_buffer *this)  in midibuf_is_empty()  argument
35 	return (this->pos_read == this->pos_write) && !this->full;  in midibuf_is_empty()
38 static int midibuf_is_full(struct midi_buffer *this)  in midibuf_is_full()  argument
40 	return this->full;  in midibuf_is_full()
43 void line6_midibuf_reset(struct midi_buffer *this)  in line6_midibuf_reset()  argument
45 	this->pos_read = this->pos_write = this->full = 0;  in line6_midibuf_reset()
46 	this->command_prev = -1;  in line6_midibuf_reset()
49 int line6_midibuf_init(struct midi_buffer *this, int size, int split)  in line6_midibuf_init()  argument
51 	this->buf = kmalloc(size, GFP_KERNEL);  in line6_midibuf_init()
53 	if (this->buf == NULL)  in line6_midibuf_init()
56 	this->size = size;  in line6_midibuf_init()
57 	this->split = split;  in line6_midibuf_init()
58 	line6_midibuf_reset(this);  in line6_midibuf_init()
62 int line6_midibuf_bytes_free(struct midi_buffer *this)  in line6_midibuf_bytes_free()  argument
65 	    midibuf_is_full(this) ?  in line6_midibuf_bytes_free()
67 	    (this->pos_read - this->pos_write + this->size - 1) % this->size +  in line6_midibuf_bytes_free()
71 int line6_midibuf_bytes_used(struct midi_buffer *this)  in line6_midibuf_bytes_used()  argument
74 	    midibuf_is_empty(this) ?  in line6_midibuf_bytes_used()
76 	    (this->pos_write - this->pos_read + this->size - 1) % this->size +  in line6_midibuf_bytes_used()
80 int line6_midibuf_write(struct midi_buffer *this, unsigned char *data,  in line6_midibuf_write()  argument
87 	if (midibuf_is_full(this) || (length <= 0))  in line6_midibuf_write()
96 	bytes_free = line6_midibuf_bytes_free(this);  in line6_midibuf_write()
102 		length1 = this->size - this->pos_write;  in line6_midibuf_write()
106 			memcpy(this->buf + this->pos_write, data, length);  in line6_midibuf_write()
107 			this->pos_write += length;  in line6_midibuf_write()
111 			memcpy(this->buf + this->pos_write, data, length1);  in line6_midibuf_write()
112 			memcpy(this->buf, data + length1, length2);  in line6_midibuf_write()
113 			this->pos_write = length2;  in line6_midibuf_write()
116 		if (this->pos_write == this->pos_read)  in line6_midibuf_write()
117 			this->full = 1;  in line6_midibuf_write()
123 int line6_midibuf_read(struct midi_buffer *this, unsigned char *data,  in line6_midibuf_read()  argument
137 	if (midibuf_is_empty(this))  in line6_midibuf_read()
140 	bytes_used = line6_midibuf_bytes_used(this);  in line6_midibuf_read()
145 	length1 = this->size - this->pos_read;  in line6_midibuf_read()
147 	command = this->buf[this->pos_read];  in line6_midibuf_read()
157 			this->buf[this->pos_read] = fixed;  in line6_midibuf_read()
165 		this->command_prev = command;  in line6_midibuf_read()
167 		if (this->command_prev > 0) {  in line6_midibuf_read()
169 			    midibuf_message_length(this->command_prev);  in line6_midibuf_read()
185 				if (this->buf[this->pos_read + i] & 0x80)  in line6_midibuf_read()
194 				if (this->buf[this->pos_read + i] & 0x80)  in line6_midibuf_read()
201 					if (this->buf[i] & 0x80)  in line6_midibuf_read()
213 		if (!this->split)  in line6_midibuf_read()
224 		memcpy(data + repeat, this->buf + this->pos_read, length);  in line6_midibuf_read()
225 		this->pos_read += length;  in line6_midibuf_read()
229 		memcpy(data + repeat, this->buf + this->pos_read, length1);  in line6_midibuf_read()
230 		memcpy(data + repeat + length1, this->buf, length2);  in line6_midibuf_read()
231 		this->pos_read = length2;  in line6_midibuf_read()
235 		data[0] = this->command_prev;  in line6_midibuf_read()
237 	this->full = 0;  in line6_midibuf_read()
241 int line6_midibuf_ignore(struct midi_buffer *this, int length)  in line6_midibuf_ignore()  argument
243 	int bytes_used = line6_midibuf_bytes_used(this);  in line6_midibuf_ignore()
248 	this->pos_read = (this->pos_read + length) % this->size;  in line6_midibuf_ignore()
249 	this->full = 0;  in line6_midibuf_ignore()
253 void line6_midibuf_destroy(struct midi_buffer *this)  in line6_midibuf_destroy()  argument
255 	kfree(this->buf);  in line6_midibuf_destroy()
256 	this->buf = NULL;  in line6_midibuf_destroy()