9 #define BUFFER_LIMIT (64*1024)
10 #define READ_SIZE (1024)
17 size_t wbuf_length, wbuf_index, wbuf_valid_length;
20 size_t rbuf_length, rbuf_index, rbuf_valid_length;
22 void (*callback)(struct ioline*io, const char *s, void *userdata);
26 static void io_callback(struct iochannel*io, void *userdata);
27 static int do_write(struct ioline *l);
29 struct ioline* ioline_new(struct iochannel *io) {
33 l = malloc(sizeof(struct ioline));
39 l->wbuf_length = l->wbuf_index = l->wbuf_valid_length = 0;
42 l->rbuf_length = l->rbuf_index = l->rbuf_valid_length = 0;
47 iochannel_set_callback(io, io_callback, l);
52 void ioline_free(struct ioline *l) {
54 iochannel_free(l->io);
60 void ioline_puts(struct ioline *l, const char *c) {
65 if (len > BUFFER_LIMIT - l->wbuf_valid_length)
66 len = BUFFER_LIMIT - l->wbuf_valid_length;
71 if (len > l->wbuf_length - l->wbuf_valid_length) {
72 size_t n = l->wbuf_valid_length+len;
73 char *new = malloc(n);
75 memcpy(new, l->wbuf+l->wbuf_index, l->wbuf_valid_length);
81 } else if (len > l->wbuf_length - l->wbuf_valid_length - l->wbuf_index) {
82 memmove(l->wbuf, l->wbuf+l->wbuf_index, l->wbuf_valid_length);
86 memcpy(l->wbuf+l->wbuf_index+l->wbuf_valid_length, c, len);
87 l->wbuf_valid_length += len;
92 void ioline_set_callback(struct ioline*l, void (*callback)(struct ioline*io, const char *s, void *userdata), void *userdata) {
93 assert(l && callback);
94 l->callback = callback;
95 l->userdata = userdata;
98 static int do_read(struct ioline *l) {
104 if (!iochannel_is_readable(l->io))
107 len = l->rbuf_length - l->rbuf_index - l->rbuf_valid_length;
109 if (len < READ_SIZE) {
110 size_t n = l->rbuf_valid_length+READ_SIZE;
112 if (n >= BUFFER_LIMIT)
115 if (l->rbuf_length >= n) {
116 if (l->rbuf_valid_length)
117 memmove(l->rbuf, l->rbuf+l->rbuf_index, l->rbuf_valid_length);
119 char *new = malloc(n);
120 if (l->rbuf_valid_length)
121 memcpy(new, l->rbuf+l->rbuf_index, l->rbuf_valid_length);
130 len = l->rbuf_length - l->rbuf_index - l->rbuf_valid_length;
132 if ((r = iochannel_read(l->io, l->rbuf+l->rbuf_index+l->rbuf_valid_length, len)) <= 0)
135 e = memchr(l->rbuf+l->rbuf_index+l->rbuf_valid_length, '\n', r);
136 l->rbuf_valid_length += r;
138 if (!e && l->rbuf_valid_length >= BUFFER_LIMIT)
139 e = l->rbuf+BUFFER_LIMIT-1;
142 p = l->rbuf+l->rbuf_index;
146 l->callback(l, p, l->userdata);
148 l->rbuf_index += m+1;
149 l->rbuf_valid_length -= m+1;
151 if (l->rbuf_valid_length == 0)
157 static int do_write(struct ioline *l) {
161 if (!l->wbuf_valid_length || !iochannel_is_writable(l->io))
164 if ((r = iochannel_write(l->io, l->wbuf+l->wbuf_index, l->wbuf_valid_length)) < 0)
167 l->wbuf_valid_length -= r;
168 if (l->wbuf_valid_length == 0)
174 static void io_callback(struct iochannel*io, void *userdata) {
175 struct ioline *l = userdata;
178 if (!l->dead && do_read(l) < 0)
181 if (!l->dead && do_write(l) < 0)
188 l->callback(l, NULL, l->userdata);