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/*
TiMidity++ -- MIDI to WAVE converter and player
Copyright (C) 1999-2002 Masanao Izumo <mo@goice.co.jp>
Copyright (C) 1995 Tuukka Toivonen <tt@cgs.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
motif_pipe.c: written by Vincent Pagel (pagel@loria.fr) 10/4/95
pipe communication between motif interface and sound generator
Copied from the motif_p source. - Glenn Trigg, 29 Oct 1998
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdarg.h>
#include <errno.h>
#include <sys/ioctl.h>
#ifdef SOLARIS
#include <sys/filio.h>
#endif
#ifndef NO_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include <sys/time.h>
#include <sys/types.h>
#include "timidity.h"
#include "controls.h"
#include "gtk_h.h"
int pipeAppli[2],pipeGtk[2]; /* Pipe for communication with Gtk+ process */
int fpip_in, fpip_out; /* in and out depends in which process we are */
int pid; /* Pid for child process */
/* DATA VALIDITY CHECK */
#define INT_CODE 214
#define STRING_CODE 216
#define DEBUGPIPE
/***********************************************************************/
/* PIPE COMUNICATION */
/***********************************************************************/
static void
pipe_error(char *st)
{
fprintf(stderr,"CONNECTION PROBLEM WITH Gtk+ PROCESS IN %s BECAUSE:%s\n",
st,
strerror(errno));
exit(1);
}
/*****************************************
* INT *
*****************************************/
void
gtk_pipe_int_write(int c)
{
int len;
int code=INT_CODE;
#ifdef DEBUGPIPE
len = write(fpip_out,&code,sizeof(code));
if (len!=sizeof(code))
pipe_error("PIPE_INT_WRITE");
#endif
len = write(fpip_out,&c,sizeof(c));
if (len!=sizeof(int))
pipe_error("PIPE_INT_WRITE");
}
void
gtk_pipe_int_read(int *c)
{
int len;
#ifdef DEBUGPIPE
int code;
len = read(fpip_in,&code,sizeof(code));
if (len!=sizeof(code))
pipe_error("PIPE_INT_READ");
if (code!=INT_CODE)
fprintf(stderr,"BUG ALERT ON INT PIPE %i\n",code);
#endif
len = read(fpip_in,c, sizeof(int));
if (len!=sizeof(int)) pipe_error("PIPE_INT_READ");
}
/*****************************************
* STRINGS *
*****************************************/
void
gtk_pipe_string_write(char *str)
{
int len, slen;
#ifdef DEBUGPIPE
int code=STRING_CODE;
len = write(fpip_out,&code,sizeof(code));
if (len!=sizeof(code)) pipe_error("PIPE_STRING_WRITE");
#endif
slen=strlen(str);
len = write(fpip_out,&slen,sizeof(slen));
if (len!=sizeof(slen)) pipe_error("PIPE_STRING_WRITE");
len = write(fpip_out,str,slen);
if (len!=slen) pipe_error("PIPE_STRING_WRITE on string part");
}
void
gtk_pipe_string_read(char *str)
{
int len, slen;
#ifdef DEBUGPIPE
int code;
len = read(fpip_in,&code,sizeof(code));
if (len!=sizeof(code)) pipe_error("PIPE_STRING_READ");
if (code!=STRING_CODE) fprintf(stderr,"BUG ALERT ON STRING PIPE %i\n",code);
#endif
len = read(fpip_in,&slen,sizeof(slen));
if (len!=sizeof(slen)) pipe_error("PIPE_STRING_READ");
len = read(fpip_in,str,slen);
if (len!=slen) pipe_error("PIPE_STRING_READ on string part");
str[slen]='\0'; /* Append a terminal 0 */
}
int
gtk_pipe_read_ready(void)
{
fd_set fds;
int cnt;
struct timeval timeout;
FD_ZERO(&fds);
FD_SET(fpip_in, &fds);
timeout.tv_sec = timeout.tv_usec = 0;
if((cnt = select(fpip_in + 1, &fds, NULL, NULL, &timeout)) < 0)
{
perror("select");
return -1;
}
return cnt > 0 && FD_ISSET(fpip_in, &fds) != 0;
}
void
gtk_pipe_open(void)
{
int res;
res=pipe(pipeAppli);
if (res!=0) pipe_error("PIPE_APPLI CREATION");
res=pipe(pipeGtk);
if (res!=0) pipe_error("PIPE_GTK CREATION");
if ((pid=fork())==0) { /*child*/
close(pipeGtk[1]);
close(pipeAppli[0]);
fpip_in=pipeGtk[0];
fpip_out= pipeAppli[1];
Launch_Gtk_Process(fpip_in);
/* Won't come back from here */
fprintf(stderr,"WARNING: come back from Gtk+\n");
exit(0);
}
close(pipeGtk[0]);
close(pipeAppli[1]);
fpip_in= pipeAppli[0];
fpip_out= pipeGtk[1];
}
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