From 665d4c9b6e3ff5e36439e33dc5a0ee2a7c84ccff Mon Sep 17 00:00:00 2001
From: Lieuwe Rooijakkers <lieuwerooijakkers@gmail.com>
Date: Sun, 21 Jul 2024 21:06:49 +0200
Subject: read_file: openOptions

---
 src/io/read_file.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

(limited to 'src/io/read_file.c')

diff --git a/src/io/read_file.c b/src/io/read_file.c
index c344f5b..414a6d8 100644
--- a/src/io/read_file.c
+++ b/src/io/read_file.c
@@ -13,7 +13,11 @@
     return NULL; \
   }
 
-struct filebuf *stream_to_filebuf(FILE *restrict stream) {
+struct filebuf *stream_to_filebuf(FILE *restrict stream, int openOptions) {
+  if (openOptions & O_NOALLOWSPONGE) {
+    return NULL;
+  }
+
   size_t sz = 0;
   size_t cap = 4096;
   char *buf = malloc(cap);
@@ -56,12 +60,19 @@ static void *fd_to_mmap(const int fd, struct stat sb) {
   return addr;
 }
 
-struct filebuf *file_to_filebuf(char *fname) {
+struct filebuf *file_to_filebuf(char *fname, int openOptions) {
   const int fd = open(fname, O_RDONLY);
+  if (fd == -1) {
+    return NULL;
+  }
+
+  if (openOptions & O_NOALLOWMAP) {
+    goto sponge;
+  }
 
   struct stat sb;
   if (fstat(fd, &sb) == -1) {
-    goto stream;
+    goto sponge;
   }
 
   void *addr;
@@ -73,9 +84,9 @@ struct filebuf *file_to_filebuf(char *fname) {
     return res;
   }
 
-stream:
+sponge:
   FILE *stream = fdopen(fd, "rb");
-  struct filebuf *res = stream_to_filebuf(stream);
+  struct filebuf *res = stream_to_filebuf(stream, openOptions);
   fclose(stream);
   return res;
 }
-- 
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