fix: reuse functions for c

Author: martabal

c/day03.c

@@ -1,3 +1,4 @@
+#include "helpers.h"
 #include <ctype.h>
 #include <stdbool.h>
 #include <stdio.h>
@@ -156,24 +157,6 @@ static int parse_with_rules(const char *message) {
   return count;
 }
 
-static char *read_file(const char *file_path) {
-  FILE *file = fopen(file_path, "r");
-  if (!file) {
-    perror("Unable to open file");
-    exit(EXIT_FAILURE);
-  }
-
-  fseek(file, 0, SEEK_END);
-  long file_size = ftell(file);
-  rewind(file);
-
-  char *content = malloc(file_size + 1);
-  fread(content, 1, file_size, file);
-  content[file_size] = '\0';
-  fclose(file);
-  return content;
-}
-
 int main() {
   char *message = read_file("crates/day03/input.txt");
 

c/day05.c

@@ -1,3 +1,4 @@
+#include "helpers.h"
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -209,31 +210,6 @@ static int check_and_sort_page_order(const struct PrintQueueChecker *checker) {
   return sum;
 }
 
-static char *read_file(const char *filename) {
-  FILE *file = fopen(filename, "r");
-  if (file == NULL) {
-    fprintf(stderr, "Unable to open file: %s\n", filename);
-    exit(1);
-  }
-
-  fseek(file, 0, SEEK_END);
-  long file_size = ftell(file);
-  rewind(file);
-
-  char *buffer = (char *)malloc(file_size + 1);
-  if (buffer == NULL) {
-    fclose(file);
-    fprintf(stderr, "Memory allocation failed\n");
-    exit(1);
-  }
-
-  size_t read_size = fread(buffer, 1, file_size, file);
-  buffer[read_size] = '\0';
-
-  fclose(file);
-  return buffer;
-}
-
 static void free_print_queue_checker(struct PrintQueueChecker *checker) {
   for (int i = 0; i < checker->rule_count; i++) {
     free(checker->rules[i].values);

c/helpers.h

@@ -0,0 +1,29 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static char *read_file(const char *filename) {
+  FILE *file = fopen(filename, "r");
+  if (file == NULL) {
+    fprintf(stderr, "Unable to open file: %s\n", filename);
+    exit(1);
+  }
+
+  fseek(file, 0, SEEK_END);
+  long file_size = ftell(file);
+  rewind(file);
+
+  char *buffer = (char *)malloc(file_size + 1);
+  if (buffer == NULL) {
+    fclose(file);
+    fprintf(stderr, "Memory allocation failed\n");
+    exit(1);
+  }
+
+  size_t read_size = fread(buffer, 1, file_size, file);
+  buffer[read_size] = '\0';
+
+  fclose(file);
+  return buffer;
+}