From 46ed1b34cbb7ea137527429f664df09f93fff134 Mon Sep 17 00:00:00 2001
From: Linus Dierheimer <Linus@Dierheimer.de>
Date: Sat, 27 Mar 2021 17:55:16 +0100
Subject: [PATCH] much faster reading of large files

---
 src/common.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/common.c b/src/common.c
index ccfa0a0f8..ec67fc2e9 100644
--- a/src/common.c
+++ b/src/common.c
@@ -226,14 +226,14 @@ void ffGetFileContent(const char* fileName, FFstrbuf* buffer)
         return;
 
     ssize_t readed;
-    while((readed = read(fd, buffer->chars, buffer->allocated)) == buffer->allocated)
+    while((readed = read(fd, buffer->chars + buffer->length, buffer->allocated - buffer->length)) == (buffer->allocated - buffer->length))
     {
+        buffer->length += readed;
         ffStrbufEnsureCapacity(buffer, buffer->allocated * 2);
-        lseek(fd, 0, SEEK_SET);
     }
 
     if(readed >= 0)
-        buffer->length = readed;
+        buffer->length += readed;
 
     ffStrbufTrimRight(buffer, '\n');
     ffStrbufTrimRight(buffer, ' ');