fix dccp sender/receiver
[paraslash.git] / write_common.c
1 /*
2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file write_common.c common functions of para_audiod and para_write */
20
21 #include "para.h"
22 #include "string.h"
23 #include "list.h"
24 #include "sched.h"
25 #include "write.h"
26 #include "error.h"
27
28 const char *writer_names[] ={WRITER_NAMES};
29 struct writer writers[NUM_SUPPORTED_WRITERS] = {WRITER_ARRAY};
30
31 static void wng_post_select(__a_unused struct sched *s, struct task *t)
32 {
33 struct writer_node_group *g = t->private_data;
34 int i;
35 size_t min_written = 0;
36
37 FOR_EACH_WRITER_NODE(i, g) {
38 struct writer_node *wn = &g->writer_nodes[i];
39 t->ret = wn->task.ret;
40 if (t->ret < 0) {
41 g->eof = 1;
42 return;
43 }
44 if (!i)
45 min_written = t->ret;
46 else
47 min_written = PARA_MIN(min_written, t->ret);
48 }
49 *g->loaded -= min_written;
50 if (!*g->loaded && *g->input_eof) {
51 g->eof = 1;
52 t->ret = -E_WNG_EOF;
53 } else
54 t->ret = 1;
55 if (*g->loaded && min_written)
56 memmove(g->buf, g->buf + min_written, *g->loaded);
57 }
58
59 int wng_open(struct writer_node_group *g)
60 {
61 int i, ret = 1;
62
63 PARA_NOTICE_LOG("opening wng %p with %d writer(s)\n", g, g->num_writers);
64 FOR_EACH_WRITER_NODE(i, g) {
65 struct writer_node *wn = &g->writer_nodes[i];
66 wn->wng = g;
67 ret = wn->writer->open(wn);
68 if (ret < 0)
69 goto out;
70 wn->chunk_bytes = ret;
71 g->max_chunk_bytes = PARA_MAX(g->max_chunk_bytes, ret);
72 wn->task.pre_select = wn->writer->pre_select;
73 wn->task.post_select = wn->writer->post_select;
74 wn->task.private_data = wn;
75 register_task(&wn->task);
76 }
77 sprintf(g->task.status, "%s", "writer node group");
78 g->eof = 0;
79 register_task(&g->task);
80 out:
81 return ret;
82 }
83
84 void wng_unregister(struct writer_node_group *g)
85 {
86 int i;
87
88 FOR_EACH_WRITER_NODE(i, g) {
89 struct writer_node *wn = &g->writer_nodes[i];
90 unregister_task(&wn->task);
91 }
92 unregister_task(&g->task);
93 g->eof = 1;
94 }
95
96 void wng_close(struct writer_node_group *g)
97 {
98 int i;
99
100 if (!g)
101 return;
102 PARA_NOTICE_LOG("closing wng with %d writer(s)\n", g->num_writers);
103 FOR_EACH_WRITER_NODE(i, g) {
104 struct writer_node *wn = &g->writer_nodes[i];
105 wn->writer->close(wn);
106 }
107 free(g->written);
108 free(g->writer_nodes);
109 free(g);
110 }
111
112 struct writer_node_group *wng_new(unsigned num_writers)
113 {
114 struct writer_node_group *g = para_calloc(sizeof(struct writer_node_group));
115 g->num_writers = num_writers;
116 g->writer_nodes = para_calloc(num_writers
117 * sizeof(struct writer_node));
118 g->written = para_calloc(num_writers * sizeof(size_t));
119 g->task.private_data = g;
120 g->task.post_select = wng_post_select;
121 g->task.flags = POST_ADD_TAIL;
122 return g;
123 }
124
125 void init_supported_writers(void)
126 {
127 int i;
128
129 FOR_EACH_WRITER(i)
130 writers[i].init(&writers[i]);
131 }
132
133 void *check_writer_arg(char *wa, int *writer_num)
134 {
135 int i;
136
137 *writer_num = -E_WRITE_COMMON_SYNTAX;
138 PARA_INFO_LOG("checking %s\n", wa);
139 FOR_EACH_WRITER(i) {
140 const char *name = writer_names[i];
141 size_t len = strlen(name);
142 char c;
143 if (strlen(wa) < len)
144 continue;
145 if (strncmp(name, wa, len))
146 continue;
147 c = wa[len];
148 if (c && c != ' ')
149 continue;
150 if (c && !writers[i].parse_config)
151 return NULL;
152 *writer_num = i;
153 return writers[i].parse_config(c? wa + len + 1 : "");
154 }
155 PARA_ERROR_LOG("%s", "writer not found\n");
156 return NULL;
157 }
158
159 struct writer_node_group *setup_default_wng(void)
160 {
161 struct writer_node_group *wng = wng_new(1);
162 enum writer_enum default_writer;
163
164 if (NUM_SUPPORTED_WRITERS == 1)
165 default_writer = FILE_WRITE;
166 else
167 default_writer = 1;
168 wng->writer_nodes[0].writer = &writers[default_writer];
169 sprintf(wng->writer_nodes[0].task.status, "%s",
170 writer_names[default_writer]);
171 PARA_INFO_LOG("using default writer: %s %p\n",
172 writer_names[default_writer], writers[default_writer].parse_config);
173 wng->writer_nodes[0].conf = writers[default_writer].parse_config("");
174 return wng;
175 }