made some fixes

main.c

@@ -4,6 +4,7 @@
 #include <string.h>
 
 #define BUFFER_LENGTH 128
+#define LINE_LENGTH 1024
 #define HASH_BUCKETS 4000037
 #define MIN_COUNT 10000
 
@@ -18,7 +19,7 @@ void string_ncopy(char *dest, const char *src, size_t max_len) {
 
 typedef struct person {
     struct person *next;
-  char *name;
+    char name[BUFFER_LENGTH];
     int count;
 } person;
 
@@ -28,24 +29,6 @@ void newPerson(person *p, const char *name) {
     p->next = NULL;
 }
 
-void insert(person **head, person *node) {
-  if (*head == NULL) {
-    *head = node;
-  } else {
-    person *p = *head;
-    int p_exists = strcmp(p->name, node->name);
-    while (p->next != NULL && p_exists != 0) {
-      p = p->next;
-      p_exists = strcmp(p->name, node->name);
-    }
-    if (p_exists == 0) {
-      p->count++;
-    } else {
-      p->next = node;
-    }
-  }
-}
-
 void sorted_name_insert(person **head, char *name) {
     person *node = (person *) malloc(sizeof(person));
     newPerson(node, name);
@@ -54,26 +37,24 @@ void sorted_name_insert(person **head, char *name) {
     } else {
         person *p = *head;
         person *p_prev = NULL;
-    int p_exists = strcmp(p->name, name);
-    if (p_exists > 0) {
-      node->next = *head;
-      *head = node;
-      return;
-    }
-    while (p->next != NULL && p_exists != 0) {
-      p_exists = strcmp(p->next->name, name);
-      if (p_exists > 0) {
-        node->next = p->next;
-        p->next = node;
-        return;
-      }
+        int cmp = strcmp(p->name, name);
+        while (p->next != NULL && cmp < 0) {
+            p_prev = p;
             p = p->next;
+            cmp = strcmp(p->name, name);
         }
-    if (p_exists == 0) {
+        if (cmp == 0){
             p->count++;
             free(node);
+        }else if (p_prev == NULL) {
+            node->next = *head;
+            *head = node;
+        } else if (p->next != NULL && cmp < 0) {
+            node->next = p;
+            p_prev->next = node;
         } else {
             p->next = node;
+            node->next = NULL;
         }
     }
 }
@@ -111,6 +92,7 @@ void display(person *head) {
     }
 }
 
+//djb2 hash http://www.cse.yorku.ca/~oz/hash.html
 u_long hash(const unsigned char *str) {
     u_long hash = 5381;
     int c;
@@ -139,35 +121,37 @@ void parse_line(char *line, char *buffer) {
         }
         buffer[i] = '\0';
         if (strcmp(buffer, "author") == 0 || strcmp(buffer, "editor") == 0) {
+            memset(buffer, 0, BUFFER_LENGTH);
             while (*line_it != '>') {
                 line_it++;
             }
             line_it++;
-      char *surname_end = line_it, *surname_start;
-      while (*line_it != '<') {
+            char *surname_end = line_it, *surname_start = line_it;
+            while (*line_it && *line_it != '<') {
                 if (*line_it == ' ') {
                     surname_start = surname_end;
                     surname_end = line_it;
                 }
                 line_it++;
-        printf("%s\n", line_it);
             }
-      printf("line_it: %s\n", line_it);
-      printf("sn start: %s\n", surname_start);
-      printf("sn end: %s\n", surname_end);
-      if (!isdigit(surname_end + 1)) {
-        surname_start = surname_end + 1;
-        surname_end = line_it - 1;
-      } else {
-        surname_start++;
-        surname_end--;
+            bool only_numbers = true;
+            char *c = surname_end;
+            while (only_numbers && c != line_it) {
+                if (!isdigit(*c)) {
+                    only_numbers = false;
+                }
+                c++;
+            }
+
+            if (!only_numbers) {
+                surname_start = surname_end;
+                surname_end = line_it;
             }
-      i = 0;
             size_t name_length = surname_end - surname_start;
-      while (i < name_length) {
-        buffer[i] = surname_start[i];
-      }
-      buffer[i] = '\0';
+            memcpy(buffer, surname_start, name_length);
+            buffer[name_length] = '\0';
+        } else {
+            memset(buffer, 0, BUFFER_LENGTH);
         }
     }
 }
@@ -218,26 +202,30 @@ int main(void) {
         hashmap[i] = NULL;
     }
     FILE *fp = fopen("dblp.xml", "r");
+    // char *line = malloc(sizeof(char) * LINE_LENGTH);
+    // size_t line_len = LINE_LENGTH;
     char *line = NULL;
     size_t line_len = 0;
     char *buffer = (char *) malloc(sizeof(char) * BUFFER_LENGTH);
     if (fp) {
-    while (!(getline(&line, &line_len, fp) < 0)) {
+        while (getline(&line, &line_len, fp) >= 0) {
+            memset(buffer, 0, BUFFER_LENGTH);
             parse_line(line, buffer);
-      if (buffer != NULL) {
+            if (*buffer != '\0') {
                 hm_insert(hashmap, buffer);
             }
         }
         fclose(fp);
     } else {
-    while (!(getline(&line, &line_len, stdin) < 0)) {
-      printf("%s", line);
+        while (getline(&line, &line_len, stdin) >= 0) {
+            memset(buffer, 0, BUFFER_LENGTH);
             parse_line(line, buffer);
-      if (buffer != NULL) {
+            if (*buffer != '\0') {
                 hm_insert(hashmap, buffer);
             }
         }
     }
+    free(line);
     free(buffer);
     printf("Done parsing!\n");
     person *list = NULL;