feat: grow dynamic array

1 files changed, 14 insertions, 1 deletions

diff --git a/io.c b/io.c
index 6c92b20..ae02a0d 100644
--- a/io.c
+++ b/io.c
@@ -14,11 +14,24 @@ InFile* read_all(const char* filename) {
     if (!in) {
         return NULL;
     }
-    char* buf = calloc(1024 * 1024, sizeof(char));
+
+    size_t buf_size = 1024 * 10;
+    char* buf = calloc(buf_size, sizeof(char));
     char* cur = buf;
     char* tmp = calloc(1024, sizeof(char));
+
     while (fgets(tmp, 1024, in)) {
         size_t len = strlen(tmp);
+        size_t used_size = cur - buf;
+
+        if (buf_size <= used_size + len) {
+            size_t old_size = buf_size;
+            buf_size *= 2;
+            buf = realloc(buf, buf_size);
+            memset(buf + old_size, 0, buf_size - old_size);
+            cur = buf + used_size;
+        }
+
         memcpy(cur, tmp, len);
         cur += len;
     }