sis.c

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/*
 * This file is part of Titan2Reader
 *
 * Copyright (C) 2006, Sebastien Judenherc <sebastien.judenherc@agecodagis.com>
 *
 * 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
 *
 */


/*
        reference document for the sismalp format: PICK00FR.DOC
        http://sismalp.obs.ujf-grenoble.fr/ftp-sismalp/msdos
*/

#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <ctype.h>
#include <math.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <assert.h>
#include <signal.h>

#define CR 13
#define LF 10

#include "common.h"

int64_t avg[MAX_CHANNEL];
int64_t ndata[MAX_CHANNEL];

FILE *sisBinFile=NULL;
char sisBinFileName[255];
int sisOffset[MAX_CHANNEL];

#define BLOCK_LENGTH 1024
#define BLOCK_SIZE (BLOCK_LENGTH/sizeof(int32_t))

FILE* OpenSisBinFile(void)
{
        int i;
        // initialize the remaing channels
        for (i=0; i<MAX_CHANNEL; i++)
        {
                // if this channel has samples in the queue but none
                // processed, then process it
                if ((HWConfig.srObs[i].npts>0)&&(infoHeader[i].npts==0))
                {
                        // reset the average computation
                        avg[i]=0;
                        ndata[i]=0;
                        InitInfoHeader(i);
                }
        }
        if (sisBinFile==NULL)
        {
                int fd;
                strcpy(sisBinFileName,"titanfileXXXXXX");
                fd=OpenTempFile(sisBinFileName);
                assert((sisBinFile=fdopen(fd,"wb"))!=NULL);
                setvbuf(sisBinFile,NULL,_IOFBF,FILE_BUFFER_SIZE);
        }
        return(sisBinFile);
}

void AbortSisBinFile(void)
{
        if (sisBinFile)
        {
                fclose(sisBinFile);
                sisBinFile=NULL;
        }
        unlink(sisBinFileName);
}

void AddSisData(int channel)
{
        int i;
        int end=HWConfig.srObs[channel].npts;
        if (channel>MAX_CHANNEL)
        {
                PrintError("channel number out of bounds\n");
                return;
        }
        if ((HWConfig.srObs[channel].npts==0)||(HWConfig.srExp[channel].npts==0))
        {
                return;
        }
        if (end+infoHeader[channel].npts>999999)
        {
                CloseSisFile();
        }

        if (OpenSisBinFile())
        {
                if (end>HWConfig.srExp[channel].npts)
                {
                        end=HWConfig.srExp[channel].npts;
                }
                for (i=0; i<end; i++)
                {
                        int32_t d=HWConfig.data[channel][i];
                        if (fwrite(&channel,sizeof(int32_t),1,sisBinFile)!=1)
                        {
                                PrintError("unable to write to %s: %m\n",
                                                sisBinFileName);
                                AbortSisBinFile();
                                exit(0);
                        }
                        if (fwrite(&d,sizeof(int32_t),1, sisBinFile)!=1)
                        {
                                PrintError("unable to write to %s: %m\n",
                                                sisBinFileName);
                                AbortSisBinFile();
                                exit(0);
                        }
                        // add to the average computation
                        if (removeMean)
                        {
                                avg[channel]+=d;
                                ndata[channel]++;
                        }
                }
                infoHeader[channel].npts+=end;
        }
}

char *time2strSismalp(double temps)
{
        static char ligne[40];
        time_t T0;
        struct tm tm0;
        T0=(time_t)temps;
        memcpy(&tm0,gmtime(&T0),sizeof(struct tm));
        memset(ligne,0,40);
        strftime(ligne,40,"%d.%m.%Y %H:%M:%S.",&tm0);
        sprintf(ligne+strlen(ligne),"%03d",(int)(1000.*(temps-(double)T0)));
        return(ligne);
}


void CloseSisFile(void)
{
        int32_t i,ch,d,len;
        int ok=-1;
        char sisFileName[255];
        char ndxFileName[255];
        FILE *fsis=NULL, *fndx=NULL;
        int ptsCnt[MAX_CHANNEL];

        if (sisBinFile==NULL)
        {
                return;
        }
        // close the temp file
        fclose(sisBinFile);
        sisBinFile=NULL;
        // look for the first used channel and update all channels
        for (i=0; i<MAX_CHANNEL; i++)
        {
                // compute the average
                if (ndata[i])
                {
                        avg[i]/=ndata[i];
                        // dump the offsets if removeMean was used
                        PrintLog("offset[%2d]=%d\n",i,(int)(avg[i]));
                }
                // update header
                ptsCnt[i]=0;
                if (infoHeader[i].npts>=128)
                {
                        UpdateInfoHeader(i);
                        if (ok<0)
                        {
                                ok=i;
                        }
                }
                else
                {
                        infoHeader[i].npts=0;
                }
        }
        // stop if no valid channel was found
        if (ok<0)
        {
                return;
        }
        // open the sis and ndx files
        strcpy(sisFileName,FileName("", ".SIS", ok, fileNameOptions&(~ADD_CHANNEL_CODE)));
        strcpy(ndxFileName,sisFileName);
        memcpy(ndxFileName+strlen(ndxFileName)-3,"NDX",3);

        fsis=fopen(sisFileName,"wb");
        if (fsis==NULL)
        {
                goto end_sis;
        }
        fndx=fopen(ndxFileName,"wt");
        if (fndx==NULL)
        {
                goto end_sis;
        }

        // compute the total length of fsis and make the sis file grow
        // up to the expected length. We cannont use truncate since it
        // is not portable.
        len=0;
        // for each channel, dump the data and update the ndx header
        sisOffset[0]=1;
        for (i=0; i<MAX_CHANNEL; i++)
        {
                char compChar[MAX_CHANNEL]="ZNEabcdefghiklmnoprqstuvwx";
                // compute the offsets for the file
                if (i==0)
                {
                        sisOffset[i]=1;
                }
                else
                {
                        sisOffset[i]=sisOffset[i-1]+(infoHeader[i-1].npts+(BLOCK_SIZE-1))/BLOCK_SIZE;
                }
                if (infoHeader[i].npts<=0)
                {
                        continue;
                }
                len+=(infoHeader[i].npts+(BLOCK_SIZE-1))/BLOCK_SIZE;
                // update the header in the ndx file
                fprintf(fndx,"%8s%6d%6d%6d%8.3f  %s%c%c",
                                infoHeader[i].station,
                                infoHeader[i].npts,
                                sisOffset[i],
                                (infoHeader[i].npts+(BLOCK_SIZE-1))/BLOCK_SIZE,
                                (double)oldHWConfig.srExp[i].base/(double)oldHWConfig.srExp[i].div,
                                time2strSismalp(infoHeader[i].correctedTime),
                                CR,LF);
                fprintf(fndx,"TIT%04d 3 %c 32 0 %c 14.00"
                                "%c%c",
                                //"                                      %c%c",
                                i,compChar[i],' ',CR,LF);
        }

        // build a file with null bytes
        d=0;
        for (i=0; i<len*BLOCK_SIZE; i++)
        {
                fwrite(&d,sizeof(int32_t),1,fsis);
        }

        
        // reopen the temp file for reading
        sisBinFile=fopen(sisBinFileName,"rb");
        if (sisBinFile)
        {
                while (fread(&ch,sizeof(int32_t),1,sisBinFile)==1)
                {
                        int64_t offset;
                        if (infoHeader[ch].npts<0)
                        {
                                continue;
                        }
                        // now read the data and dump the sis file
                        if (ch>=MAX_CHANNEL)
                        {
                                PrintError("corrupted temp file, aborting\n");
                                goto end_sis;
                        }
                        if (fread(&d,sizeof(int32_t),1,sisBinFile)!=1)
                        {
                                goto end_sis;
                        }
                        // compute the appropriate position and seek
                        offset=(((sisOffset[ch]-1)*BLOCK_SIZE)+ptsCnt[ch])*4;
                        if (0!=fseek(fsis,offset, SEEK_SET))
                        {
                                PrintError("seek: %m\n");
                        }
                        if (removeMean)
                        {
                                d-=avg[ch];
                        }
                        fwrite(&d,4,1,fsis);
                        ptsCnt[ch]++;
                }
                fclose(sisBinFile);
        }
        else
        {
                PrintError("%s: %m\n",sisBinFileName);
        }
        sisBinFile=NULL;
end_sis:
        // close all the open file
        if (fsis)
        {
                fclose(fsis);
        }
        if (fndx)
        {
                fclose(fndx);
        }
        PrintLog("OUTPUT: %s, %s\n",ndxFileName,sisFileName);
        if (sisBinFile)
        {
                fclose(sisBinFile);
        }

        // remove the temp file
        unlink(sisBinFileName);
        for (i=0; i<MAX_CHANNEL; i++)
        {
                infoHeader[i].npts=0;
        }
        if (skipTime>-1)
        {
                FILE *f;
                f=fopen("skip","wt");
                if (f!=NULL)
                {
                        fprintf(f,"%d",(int)(correctedTime.usecond>>32)-60);
                        fclose(f);
                }
        }
}

---