Node Iterator and Start Input Error Checking

movies/input.c

@@ -0,0 +1,21 @@
+#include "input.h"
+
+int integer_input(char* val) {
+
+  int num;
+  char *error = "";
+
+  do {
+  printf("\n%s\n%s",error, val);
+  fflush(stdout);
+  
+  char buf[128];
+  read(STDIN_FILENO, buf, 127);
+  num = atoi(buf);
+
+  error = "Input Error, try again.";
+
+  } while(!num);
+
+  return num;
+}

movies/input.h

@@ -0,0 +1,11 @@
+
+#include "stdio.h"
+#include "stdlib.h"
+#include "unistd.h"
+
+#ifndef INPUT
+#define INPUT
+
+int integer_input(char*);
+
+#endif

movies/makefile

@@ -1,8 +1,8 @@
 CC=gcc --std=c99 -g
 output=movies
 
-all: movies.c csv_parser.o node.o
-	$(CC) movies.c csv_parser.o node.o -o $(output)
+all: movies.c csv_parser.o node.o input.o
+	$(CC) movies.c csv_parser.o node.o input.o -o $(output)
 
 csv_parser.o: csv_parser.c csv_parser.h 
 	$(CC) -c csv_parser.c -o csv_parser.o
@@ -10,6 +10,9 @@ csv_parser.o: csv_parser.c csv_parser.h
 node.o: node.c node.h
 	$(CC) -c node.c -o node.o
 
+input.o: input.h input.c
+	$(CC) -c input.c -o input.o
+
 run: 
 	./movies movies_sample_1.csv
 

movies/movies.c

@@ -39,23 +39,39 @@ int main(int argc, char** argv) {
 
 int menu() {
 
-  int option = 0;
-
   printf("1. Show movies released in the specified year\n");
   printf("2. Show highest rated movie for each year\n");
   printf("3. Show the title and year of release of all movies in a specific language\n");
   printf("4. Exit from the program\n\n");
 
-  while(option > 4 || option < 1) {
-    printf("Enter a choice from 1 to 4: ");
-    scanf("%i", &option);
-  }
+  int option;
+  do {
+    option = integer_input("Enter a choice from 1 to 4: ");
+  } while(option > 4 || option < 1);
 
   return option;
 }
 
+int year_print(struct csv* data, void* val) {
+
+  if(data->year != *(int*)val)
+    return 0;
+
+  printf("%s\n", data->title);
+  return 1;
+}
+
 void movie_year(struct node* head) {
-  printf("stub\n");
+
+  void* f =  &year_print;
+  int* val = malloc(sizeof(int));
+
+  *val = integer_input("Enter year to search movies from: ");
+
+
+  iterate_nodes(head, f, val);
+
+  printf("\n\n");
 
 }
 

movies/movies.h

@@ -8,6 +8,7 @@
 
 #include "csv_parser.h"
 #include "node.h"
+#include "input.h"
 
 int menu();
 

movies/node.c

@@ -45,3 +45,19 @@ int count_nodes(struct node* head) {
   return num;
 }
 
+void iterate_nodes(struct node* head, void *func (void*, void*), void* val) {
+
+  if(!head)
+    return;
+
+  if(head->node)
+    func(head->data, val);
+
+  struct node* temp = head;
+
+  while(temp->node) {
+    temp = temp->node;
+    func(temp->data, val);
+  }
+}
+

movies/node.h

@@ -14,4 +14,6 @@ struct node* appendv_node(struct node*, void*);
 
 int count_nodes(struct node*);
 
+void iterate_nodes(struct node*, void *func(void*, void*), void*);
+
 #endif