+/* The original code is public domain -- Will Hartung 4/9/09 */
+/* Modifications, public domain as well, by Antti Haapala, 11/10/17
+ - Switched to getc on 5/23/19 */
+/* Modifications, public domain, by Elias Fleckenstein 24/04/2022 */
+
+#include <stdlib.h>
+#include <errno.h>
+#include "getline.h"
+
+// if typedef doesn't exist (msvc, blah)
+typedef intptr_t ssize_t;
+
+ssize_t getline(char **lineptr, size_t *n, FILE *stream) {
+ size_t pos;
+ int c;
+
+ if (lineptr == NULL || stream == NULL || n == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ c = getc(stream);
+ if (c == EOF) {
+ return -1;
+ }
+
+ if (*lineptr == NULL) {
+ *lineptr = malloc(128);
+ if (*lineptr == NULL) {
+ return -1;
+ }
+ *n = 128;
+ }
+
+ pos = 0;
+ while(c != EOF) {
+ if (pos + 1 >= *n) {
+ size_t new_size = *n + (*n >> 2);
+ if (new_size < 128) {
+ new_size = 128;
+ }
+ char *new_ptr = realloc(*lineptr, new_size);
+ if (new_ptr == NULL) {
+ return -1;
+ }
+ *n = new_size;
+ *lineptr = new_ptr;
+ }
+
+ ((unsigned char *)(*lineptr))[pos ++] = c;
+ if (c == '\n') {
+ break;
+ }
+ c = getc(stream);
+ }
+
+ (*lineptr)[pos] = '\0';
+ return pos;
+}