// file: /data/courses/ece_1111/lectures/current/lecture_13/functs_01.cu
//

// local include files
//
#include "example.h"

// function: vinit
//
// arguments:
//  int* v: input vector
//  int N: vector dimension
//
// return: returns a boolean indicating status
//
// This method does nothing.
//
bool vinit(int* v, int N) {

  // print to stdout
  //
  printf("vinit:: initializing the vector using the CPU\n");

  // initialize the vector
  //
  for (long i = 0; i < N; i++) {
    if ((i % 2) == 0) {
      *v++ = (long)1;
    }
    else {
      *v++ = (long)0;
    }
  }

  // exit gracefully
  //
  return true;
}

// function: vadd
//
// arguments:
//  int* c: (output) result
//  int* a: (input) first operand
//  int* b: (input) second operand
//  int N:  (input) the vector dimension
//
// return: a boolean indicating status
//
// This method adds two vectors.
//
bool vadd(int *c, int *a, int *b, int N) {

  // status
  //
  printf("... adding two vectors on the cpu ...\n");

  // iterate
  //
  for (int i = 0; i < N; i++) {
    c[i] = a[i] + b[i];
  }

  // exit gracefully
  //
  return true;
}