#include <stdio.h> 
#include <stdlib.h>

#include "fifth.h" 




/* asume grid is a valid grid with its 2D array allocated. set the
   value of grid.data[i][j] to val*/ 
void set(Grid * g, int i, int j,  float val) {



}

/* assume grid is a valid grid with data allocated. return the value
   in the grid at position i,j */
float get(Grid g, int i, int j) {



}


/* f is a file that has just been opened. read and initialize the
   header of g from file f */
void readHeader(FILE* f, Grid * g) {

  char foo[100]; 
  fscanf(f, "%s", foo);
  fscanf(f, "%d",  &(g->ncols)); 
  fscanf(f, "%s", foo);
  fscanf(f, "%d", &(g->nrows)); 

  fscanf(f, "%s", foo);
  fscanf(f, "%s", foo);
  fscanf(f, "%s", foo);
  fscanf(f, "%s", foo);
  fscanf(f, "%s", foo);
  fscanf(f, "%s", foo);
  fscanf(f, "%s", foo);
  fscanf(f, "%s", foo);

}

void printInfo(Grid g) {
  printf("ncols=%d, nrows=%d\n", g.ncols, g.nrows);
}


int main (int argc, char** args) {

  /* 
  printf("argc=%d\n", argc);
  int i;
  for (i=0; i < argc; i++) 
    printf("%s\n", args[i]);
  */
  int i, j; 
  if (argc != 3) {
    printf("usage: %s <elevGridName> <flowGridName>\n", args[0]);
    exit(1); 
  }
  char *elevfname, *flowfname;
  elevfname= args[1]; 
  flowfname=args[2];

  Grid elevgrid; 
  FILE *f; 
  f = fopen(elevfname, "r");
  if (f == NULL) {
    printf("cannot open file %s\n", elevfname);
    exit(1);
  }
  readHeader(f, &elevgrid);

  //allocate the elevgrid  data 
  elevgrid.data = (float**) malloc(elevgrid.nrows*sizeof(float*));
  if (elevgrid.data == NULL) {}
  for (i=0; i<elevgrid.nrows; i++) {
    elevgrid.data[i] = (float*)malloc(elevgrid.ncols*sizeof(float));
    if (elevgrid.data[i] == NULL) {}
  }
  //read the values form f into elevgrid  
  for (i=0; i< elevgrid.nrows; i++) 
    for (j=0; j< elevgrid.ncols; j++)  
      fscanf(f, "%f", &(elevgrid.data[i][j]));

  printInfo(elevgrid);

  return 0; 
}