code.delx.au - pulseaudio/blob - polyp/cli.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <assert.h>
  29 #include <stdlib.h>
  30
  31 #include "ioline.h"
  32 #include "cli.h"
  33 #include "module.h"
  34 #include "sink.h"
  35 #include "source.h"
  36 #include "client.h"
  37 #include "sink-input.h"
  38 #include "source-output.h"
  39 #include "tokenizer.h"
  40 #include "strbuf.h"
  41 #include "namereg.h"
  42 #include "cli-text.h"
  43 #include "cli-command.h"
  44 #include "xmalloc.h"
  45 #include "log.h"
  46
  47 #define PROMPT ">>> "
  48
  49 struct pa_cli {
  50     struct pa_core *core;
  51     struct pa_ioline *line;
  52
  53     void (*eof_callback)(struct pa_cli *c, void *userdata);
  54     void *userdata;
  55
  56     struct pa_client *client;
  57
  58     int fail, kill_requested, defer_kill;
  59 };
  60
  61 static void line_callback(struct pa_ioline *line, const char *s, void *userdata);
  62 static void client_kill(struct pa_client *c);
  63
  64 struct pa_cli* pa_cli_new(struct pa_core *core, struct pa_iochannel *io, struct pa_module *m) {
  65     char cname[256];
  66     struct pa_cli *c;
  67     assert(io);
  68
  69     c = pa_xmalloc(sizeof(struct pa_cli));
  70     c->core = core;
  71     c->line = pa_ioline_new(io);
  72     assert(c->line);
  73
  74     c->userdata = NULL;
  75     c->eof_callback = NULL;
  76
  77     pa_iochannel_socket_peer_to_string(io, cname, sizeof(cname));
  78     c->client = pa_client_new(core, "CLI", cname);
  79     assert(c->client);
  80     c->client->kill = client_kill;
  81     c->client->userdata = c;
  82     c->client->owner = m;
  83
  84     pa_ioline_set_callback(c->line, line_callback, c);
  85     pa_ioline_puts(c->line, "Welcome to polypaudio! Use \"help\" for usage information.\n"PROMPT);
  86
  87     c->fail = c->kill_requested = c->defer_kill = 0;
  88
  89     return c;
  90 }
  91
  92 void pa_cli_free(struct pa_cli *c) {
  93     assert(c);
  94     pa_ioline_close(c->line);
  95     pa_ioline_unref(c->line);
  96     pa_client_free(c->client);
  97     pa_xfree(c);
  98 }
  99
 100 static void client_kill(struct pa_client *client) {
 101     struct pa_cli *c;
 102     assert(client && client->userdata);
 103     c = client->userdata;
 104
 105     pa_log(__FILE__": CLI client killed.\n");
 106     if (c->defer_kill)
 107         c->kill_requested = 1;
 108     else {
 109         if (c->eof_callback)
 110             c->eof_callback(c, c->userdata);
 111     }
 112 }
 113
 114 static void line_callback(struct pa_ioline *line, const char *s, void *userdata) {
 115     struct pa_strbuf *buf;
 116     struct pa_cli *c = userdata;
 117     char *p;
 118     assert(line && c);
 119
 120     if (!s) {
 121         pa_log(__FILE__": CLI got EOF from user.\n");
 122         if (c->eof_callback)
 123             c->eof_callback(c, c->userdata);
 124
 125         return;
 126     }
 127
 128     buf = pa_strbuf_new();
 129     assert(buf);
 130     c->defer_kill++;
 131     pa_cli_command_execute_line(c->core, s, buf, &c->fail);
 132     c->defer_kill--;
 133     pa_ioline_puts(line, p = pa_strbuf_tostring_free(buf));
 134     pa_xfree(p);
 135
 136     if (c->kill_requested) {
 137         if (c->eof_callback)
 138             c->eof_callback(c, c->userdata);
 139     } else
 140         pa_ioline_puts(line, PROMPT);
 141 }
 142
 143 void pa_cli_set_eof_callback(struct pa_cli *c, void (*cb)(struct pa_cli*c, void *userdata), void *userdata) {
 144     assert(c);
 145     c->eof_callback = cb;
 146     c->userdata = userdata;
 147 }