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 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 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 "clitext.h"
  43 #include "cli-command.h"
  44 #include "xmalloc.h"
  45
  46 struct pa_cli {
  47     struct pa_core *core;
  48     struct pa_ioline *line;
  49
  50     void (*eof_callback)(struct pa_cli *c, void *userdata);
  51     void *userdata;
  52
  53     struct pa_client *client;
  54
  55     int fail, verbose, kill_requested, defer_kill;
  56 };
  57
  58 static void line_callback(struct pa_ioline *line, const char *s, void *userdata);
  59
  60 static const char prompt[] = ">>> ";
  61
  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");
  86     pa_ioline_puts(c->line, prompt);
  87
  88     c->fail = c->kill_requested = c->defer_kill = 0;
  89     c->verbose = 1;
  90
  91     return c;
  92 }
  93
  94 void pa_cli_free(struct pa_cli *c) {
  95     assert(c);
  96     pa_ioline_free(c->line);
  97     pa_client_free(c->client);
  98     pa_xfree(c);
  99 }
 100
 101 static void client_kill(struct pa_client *client) {
 102     struct pa_cli *c;
 103     assert(client && client->userdata);
 104     c = client->userdata;
 105
 106     fprintf(stderr, "CLI client killed.\n");
 107     if (c->defer_kill)
 108         c->kill_requested = 1;
 109     else {
 110         if (c->eof_callback)
 111             c->eof_callback(c, c->userdata);
 112     }
 113 }
 114
 115 static void line_callback(struct pa_ioline *line, const char *s, void *userdata) {
 116     struct pa_strbuf *buf;
 117     struct pa_cli *c = userdata;
 118     char *p;
 119     assert(line && c);
 120
 121     if (!s) {
 122         fprintf(stderr, "CLI got EOF from user.\n");
 123         if (c->eof_callback)
 124             c->eof_callback(c, c->userdata);
 125
 126         return;
 127     }
 128
 129     buf = pa_strbuf_new();
 130     assert(buf);
 131     c->defer_kill++;
 132     pa_cli_command_execute_line(c->core, s, buf, &c->fail, &c->verbose);
 133     c->defer_kill--;
 134     pa_ioline_puts(line, p = pa_strbuf_tostring_free(buf));
 135     pa_xfree(p);
 136
 137     if (c->kill_requested) {
 138         if (c->eof_callback)
 139             c->eof_callback(c, c->userdata);
 140     } else
 141         pa_ioline_puts(line, prompt);
 142 }
 143
 144 void pa_cli_set_eof_callback(struct pa_cli *c, void (*cb)(struct pa_cli*c, void *userdata), void *userdata) {
 145     assert(c && cb);
 146     c->eof_callback = cb;
 147     c->userdata = userdata;
 148 }