From 46f8468c24a5d593214cb1f6d20a6500c340360a Mon Sep 17 00:00:00 2001
From: g0mb4 <gomba007@gmail.com>
Date: Sun, 18 Aug 2024 19:25:15 +0200
Subject: [PATCH] Add support for `fopen()`'s modes.

---
 oogabooga/third_party/stb_vorbis.c | 33 ++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/oogabooga/third_party/stb_vorbis.c b/oogabooga/third_party/stb_vorbis.c
index 13ca4d4..bbae01f 100644
--- a/oogabooga/third_party/stb_vorbis.c
+++ b/oogabooga/third_party/stb_vorbis.c
@@ -70,8 +70,37 @@ int fseek(File f, s64 offset, s64 origin) {
 }
 
 File fopen(const char *filename, const char *mode) {
-    // Handling modes
-    File f = os_file_open_s(STR(filename), O_READ);
+    Os_Io_Open_Flags flags = 0;
+
+    while (*mode) {
+      switch (*mode) {
+         case 'r': 
+            if (*(mode + 1) == '+') {
+               flags = O_READ | O_WRITE;
+            } else {
+               flags = O_READ;
+            }
+            break;
+
+         case 'w': 
+            if (*(mode + 1) == '+') {
+               flags = O_READ | O_WRITE | O_CREATE;
+            } else {
+               flags = O_WRITE | O_CREATE;
+            }
+            break;
+
+         case 'b':
+            // Do nothing.
+            break;
+
+         default: 
+            assert(0, "Unknown/unsupported fopen mode: %c", *mode);
+      }
+      mode++;
+    }
+
+    File f = os_file_open_s(STR(filename), flags);
     return f;
 }