1 files changed, 92 insertions, 0 deletions

diff --git a/src/questions.c b/src/questions.c
new file mode 100644
index 0000000..88671a7
--- /dev/null
+++ b/src/questions.c
@@ -0,0 +1,92 @@
+#include "questions.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_LINE 512
+
+static int add_question(char ***arr, size_t *count, const char *text) {
+  char **tmp = realloc(*arr, (*count + 1) * sizeof(char *));
+  if (!tmp)
+    return EXIT_FAILURE;
+  *arr = tmp;
+
+  (*arr)[*count] = malloc(strlen(text) + 1);
+  if (!(*arr)[*count])
+    return EXIT_FAILURE;
+
+  strcpy((*arr)[*count], text);
+  (*count)++;
+  return EXIT_SUCCESS;
+}
+
+int load_questions(const char *filename, QuestionSet *qs) {
+  if (!filename || !qs)
+    return EXIT_FAILURE;
+
+  FILE *f = fopen(filename, "r");
+  if (!f)
+    return EXIT_FAILURE;
+
+  qs->general = NULL;
+  qs->major = NULL;
+  qs->general_count = 0;
+  qs->major_count = 0;
+
+  char line[MAX_LINE];
+  enum { NONE, GENERAL, MAJOR } mode = NONE;
+
+  while (fgets(line, sizeof(line), f)) {
+    line[strcspn(line, "\n")] = '\0';
+    if (line[0] == '\0')
+      continue;
+
+    if (strcmp(line, "#GENERAL") == 0) {
+      mode = GENERAL;
+      continue;
+    }
+    if (strcmp(line, "#MAJOR") == 0) {
+      mode = MAJOR;
+      continue;
+    }
+
+    int res = EXIT_FAILURE;
+    switch (mode) {
+    case GENERAL:
+      res = add_question(&qs->general, &qs->general_count, line);
+      break;
+    case MAJOR:
+      res = add_question(&qs->major, &qs->major_count, line);
+      break;
+    default:
+      continue; // ignore lines before section
+    }
+
+    if (res != EXIT_SUCCESS) {
+      fclose(f);
+      free_questions(qs);
+      return EXIT_FAILURE;
+    }
+  }
+
+  fclose(f);
+  return (qs->general_count && qs->major_count) ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+void free_questions(QuestionSet *qs) {
+  if (!qs)
+    return;
+
+  for (size_t i = 0; i < qs->general_count; i++)
+    free(qs->general[i]);
+  for (size_t i = 0; i < qs->major_count; i++)
+    free(qs->major[i]);
+
+  free(qs->general);
+  free(qs->major);
+
+  qs->general = NULL;
+  qs->major = NULL;
+  qs->general_count = 0;
+  qs->major_count = 0;
+}