sshval now read both time and data at the same time

sshval.c

 #include<stdio.h>
 #include<stdlib.h>
-#include"svg.h"
+#include<math.h>
+#include"svgplot.h"
 
-#define LF 256
+#define LF 32
 
 long int numLines(FILE *FS){
-
   long int nl = 0L;
   int c = 0;
-  while((c=getc(FS)) != EOF){
+  while((c=fgetc(FS)) != EOF){
     if (c=='\n'){
       nl += 1;
     }
@@ -46,13 +46,17 @@ int Strcmp(char *sa, char *sb){
 
 int main(int argc, char *argv[]){
     
-  if (argc != 3){
+  if (argc != 5){
     printf("Usage %s filename (stationame)\n",argv[0]);
     return 1;
   }
     
   char *filename = argv[1];
   char *station  = argv[2];
+  char *datebeg  = argv[3];
+  char *datend   = argv[4];
+  int idbeg = atoi(datebeg);
+  int idend = atoi(datend);
 
   FILE *FS = NULL;
   FS = fopen(filename,"r");
@@ -60,14 +64,16 @@ int main(int argc, char *argv[]){
     printf("error in opening the file %s\n", filename);
     return 1;
   }
+
   long int nline = numLines(FS);
   
   char cc = ' ';
   char field[LF] ="";
+  char ifield[LF] ="";
   int ne = 0;
   int nfl = 0;
   int nl = 0;
-  //Here we calculate the number of the field from the header
+  //Here we calculate the number of the field from the CSV header
   while ((cc=fgetc(FS)) != EOF){
     if (cc != ','){
       if(cc=='\n'){
@@ -79,12 +85,10 @@ int main(int argc, char *argv[]){
       nfl += 1;
     }
   }
-
-  printf("number of fields is %d \n", nfl);
-
+  //printf("number of fields is %d \n", nfl);
   rewind(FS);
 
-  char **cfl = malloc(sizeof(char *)*nfl);
+  char **cfl = malloc(sizeof(char *)*nfl);  // each field is a array of character array
   
   nfl = 0;
   nl  = 0;
@@ -115,63 +119,89 @@ int main(int argc, char *argv[]){
 
   //now we read date time;
   ne = 0;
-  int ifld = 0;
   nl = 0;
+  int nit = 0;
+  int ifld = 0;
   int *icontent = NULL;
   float *fcontent = NULL;
   int ic = 0;
   for (int i=0; i < nfl; ++i){
     if (Strcmp(cfl[i],station)){
       ic = i;
-      if (ic == 0){
-	 icontent = malloc(sizeof(int) *(nline -1));
-      }
-      if (ic > 0) {
-	fcontent = malloc(sizeof(float) *(nline -1));
-      }
-      printf("%d \t %s\n",i,cfl[i]);
+      icontent = malloc(sizeof(int) *(nline -1));
+      fcontent = malloc(sizeof(float) *(nline -1));
       while ((cc=fgetc(FS)) != EOF){
 	if (cc != ','){
 	  if(cc=='\n'){
 	    ne = 0;
+	    nit = 0;
 	    nl += 1;
 	    ifld = 0;
 	  }
 	  else{
-	    if (ic == ifld ) {field[ne] = cc;ne += 1;}
+	    if (ic == ifld)  {field[ne]   = cc; ne  += 1;}
+	    if (ifld == 0)   {ifield[nit] = cc; nit += 1;}
 	  }
 	}
 	else{
-	  if (ic == ifld ) {
-	    if (ic == 0)icontent[nl] = atoi(field);
-	    if (ic >  0)fcontent[nl] = atof(field);
-	  }
+	  if (ifld == 0)  icontent[nl] = atoi(ifield);
+	  if (ic == ifld )fcontent[nl] = atof(field);
 	  ifld += 1;
 	  ne=0;
 	}
       }
     }
   }
-
-  if (icontent == NULL && ic == 0) printf("something wrong happend. perhaps the station %s is not in the csv file %s\n",station,filename);
-  if (fcontent == NULL && ic > 0 ) printf("something wrong happend. perhaps the station %s is not in the csv file %s\n",station,filename);
   
+  if (icontent == NULL || fcontent == NULL){ 
+    printf("something went wrong. Perhaps the station %s is not in the csv file %s\n",station,filename);
+    return 1;
+    fclose(FS);
+  }
   fclose(FS);
+
+  int ii = 0;
+  int ia = 0, ib = 0;
+  for(ii=0; ii < (nline-1);++ii){
+    if (icontent[ii] == 0 ) break; 
+  }
+
+  for(ia=0; ia < (ii+1);++ia){
+    if (icontent[ia] == idbeg) break; 
+  }
   
-  for(int i=0; i < (nline-1);++i){
-    if (icontent != NULL && ic == 0 && icontent[i] != 0 )printf("%d\n",icontent[i]);
-    if (fcontent != NULL && ic > 0)printf("%f\n",fcontent[i]);
+  for(ib=0; ib < (ii+1);++ib){
+    if (icontent[ib] == idend) break; 
   }
 
+  printf("%d\t%ld\t%d\t%d\n",ii,(nline -1),ia,ib); 
 
-  if (fcontent != NULL && ic > 0){
-    create_svg(fcontent, nline);
+
+  for (int i=ia; i <= ib;++i){
+    printf("%d\t%f\n",icontent[i],fcontent[i]);
   }
-    
-  free(cfl);
+
+
+  float rmax = sfmax(fcontent,ii+1);
+  float rmin = sfmin(fcontent,ii+1);
+ 
+  //printf("%f\t%f\n",rmin,rmax); 
+  svgmeta svgm;                                                                                                                                                                                              
   
-  if (icontent != NULL )free(icontent);
-  if (fcontent != NULL )free(fcontent);
+  FILE * filsvg = svg_init(900, 600, 0.0,(float)(ii+1),rmin,rmax,"ssh.html",&svgm);
+
+  float *xax = (float *) malloc(sizeof(float) *(ii+1));
 
+  for (int i=0; i < (ii+1);++i) xax[i] = (float)(i);
+  
+  if ( filsvg != NULL){                                                                                                                                                                                        
+    svg_add(filsvg,xax,fcontent,(ii+1),&svgm);
+    svg_close(filsvg);                                                                                                                                                                                            
+  }                                     
+      
+  free(cfl);
+  free(icontent);
+  free(fcontent);
+    
   return 0;
 }