OS1/directories/csv_parser.c

#include "csv_parser.h"

struct node* parse_csv(char* name) {

  FILE * file;
  file = fopen(name, "r");
  if(!file) {
    printf("Your File was Stolen by the Gremlins\n");
    exit(66);

  }
// Buffer File For chars
  char* buffer;
  size_t buff_size = 1000;
  ssize_t chars = -2;
  buffer = malloc(buff_size * sizeof(char));

  // Deal with Top of CSV
  getline(&buffer, &buff_size, file);
  chars = getline(&buffer, &buff_size, file);

  struct node* head = appendv_node(NULL, parse_line(buffer));

  chars = getline(&buffer, &buff_size, file);

  // Actually Store the CSV
  while(chars != -1) {
  
    appendv_node(head, parse_line(buffer));

    chars = getline(&buffer, &buff_size, file);
  }

  // Free unecessary buffer files
  free(buffer);
  fclose(file);

  printf("Processed file %s and processed data for %d movies.\n\n", name, count_nodes(head));

  return head;

}

struct csv* parse_line(char* line) {

  struct csv* mov = malloc(sizeof(struct csv));

  // Deal with title
  char* sub = strtok(line, ",");
  mov->title = malloc(sizeof(char) *(strlen(sub) + 1));
  strcpy(mov->title, sub);

  mov->year = atoi(strtok(NULL, ","));

  // Allocate number of languages and save string
  sub = strtok(NULL, ",");
  mov->numlang = 1 + count_char(sub, ';');
  mov->languages = malloc(mov->numlang * sizeof(char*));

  char* lang = malloc(sizeof(char) * (strlen(sub) + 1));
  strcpy(lang, sub);

  mov->rating = atof(strtok(NULL, ""));


  // Finish parsing Languages
  for(int i = 0; i < mov->numlang; i++) {

    if(!i)
      sub = strtok( (lang+1), ";");
    else
      sub = strtok(NULL, ";");

    mov->languages[i] = malloc(sizeof(char) * (strlen(sub) + 1));
    strcpy(mov->languages[i], sub);

  }

  // Remove icky char from end of last string
  mov->languages[mov->numlang - 1][strlen(mov->languages[mov->numlang - 1]) - 1] = '\0';

  return mov;
}

// Debugging; not used
void print_movies(struct node* head) {

  if(!head) {
    printf("Yo F'd up mate (print_movies)");
    return;
  }

  struct node* node = head;

  while(1) {

    print_line(node->data);

    if(node->node)
      node = node->node;
    else
      return;
  }
}

// Debugging; not used
void print_line(struct csv* printer) {

  printf("%s, %i, ", printer->title, printer->year);
  for(int i = 0; i < printer->numlang; i++) {
    printf("%s:", printer->languages[i]);
  }
  printf(", %f\n", printer->rating);

}

// Counts number of times given char appears in string
int count_char(char* text, char cha) {

  int length = strlen(text);
  int num = 0;

  for(int i = 0; i < length; i++) {
    if(text[i] == cha)
      num++;
  }

  return num;
}