23 int bipbuf_unused(const bipbuf_t* me)  in bipbuf_unused()  argument
25     if (1 == me->b_inuse)  in bipbuf_unused()
27         return me->a_start - me->b_end;  in bipbuf_unused()
29         return me->size - me->a_end;  in bipbuf_unused()
32 int bipbuf_size(const bipbuf_t* me)  in bipbuf_size()  argument
34     return me->size;  in bipbuf_size()
37 int bipbuf_used(const bipbuf_t* me)  in bipbuf_used()  argument
39     return (me->a_end - me->a_start) + me->b_end;  in bipbuf_used()
42 void bipbuf_init(bipbuf_t* me, const unsigned int size)  in bipbuf_init()  argument
44     me->a_start = me->a_end = me->b_end = 0;  in bipbuf_init()
45     me->size = size;  in bipbuf_init()
46     me->b_inuse = 0;  in bipbuf_init()
51     bipbuf_t *me = malloc(bipbuf_sizeof(size));  in bipbuf_new()  local
52     if (!me)  in bipbuf_new()
54     bipbuf_init(me, size);  in bipbuf_new()
55     return me;  in bipbuf_new()
58 void bipbuf_free(bipbuf_t* me)  in bipbuf_free()  argument
60     free(me);  in bipbuf_free()
63 int bipbuf_is_empty(const bipbuf_t* me)  in bipbuf_is_empty()  argument
65     return me->a_start == me->a_end;  in bipbuf_is_empty()
70 static void __check_for_switch_to_b(bipbuf_t* me)  in __check_for_switch_to_b()  argument
72     if (me->size - me->a_end < me->a_start - me->b_end)  in __check_for_switch_to_b()
73         me->b_inuse = 1;  in __check_for_switch_to_b()
77 unsigned char *bipbuf_request(bipbuf_t* me, const int size)  in bipbuf_request()  argument
79     if (bipbuf_unused(me) < size)  in bipbuf_request()
81     if (1 == me->b_inuse)  in bipbuf_request()
83         return (unsigned char *)me->data + me->b_end;  in bipbuf_request()
87         return (unsigned char *)me->data + me->a_end;  in bipbuf_request()
91 int bipbuf_push(bipbuf_t* me, const int size)  in bipbuf_push()  argument
93     if (bipbuf_unused(me) < size)  in bipbuf_push()
96     if (1 == me->b_inuse)  in bipbuf_push()
98         me->b_end += size;  in bipbuf_push()
102         me->a_end += size;  in bipbuf_push()
105     __check_for_switch_to_b(me);  in bipbuf_push()
109 int bipbuf_offer(bipbuf_t* me, const unsigned char *data, const int size)  in bipbuf_offer()  argument
112     if (bipbuf_unused(me) < size)  in bipbuf_offer()
115     if (1 == me->b_inuse)  in bipbuf_offer()
117         memcpy(me->data + me->b_end, data, size);  in bipbuf_offer()
118         me->b_end += size;  in bipbuf_offer()
122         memcpy(me->data + me->a_end, data, size);  in bipbuf_offer()
123         me->a_end += size;  in bipbuf_offer()
126     __check_for_switch_to_b(me);  in bipbuf_offer()
130 unsigned char *bipbuf_peek(const bipbuf_t* me, const unsigned int size)  in bipbuf_peek()  argument
133     if (me->size < me->a_start + size)  in bipbuf_peek()
136     if (bipbuf_is_empty(me))  in bipbuf_peek()
139     return (unsigned char *)me->data + me->a_start;  in bipbuf_peek()
142 unsigned char *bipbuf_peek_all(const bipbuf_t* me, unsigned int *size)  in bipbuf_peek_all()  argument
144     if (bipbuf_is_empty(me))  in bipbuf_peek_all()
147     *size = me->a_end - me->a_start;  in bipbuf_peek_all()
148     return (unsigned char*)me->data + me->a_start;  in bipbuf_peek_all()
151 unsigned char *bipbuf_poll(bipbuf_t* me, const unsigned int size)  in bipbuf_poll()  argument
153     if (bipbuf_is_empty(me))  in bipbuf_poll()
157     if (me->size < me->a_start + size)  in bipbuf_poll()
160     void *end = me->data + me->a_start;  in bipbuf_poll()
161     me->a_start += size;  in bipbuf_poll()
164     if (me->a_start == me->a_end)  in bipbuf_poll()
167         if (1 == me->b_inuse)  in bipbuf_poll()
169             me->a_start = 0;  in bipbuf_poll()
170             me->a_end = me->b_end;  in bipbuf_poll()
171             me->b_end = me->b_inuse = 0;  in bipbuf_poll()
175             me->a_start = me->a_end = 0;  in bipbuf_poll()
178     __check_for_switch_to_b(me);  in bipbuf_poll()