From f704739a7cd8785688f096a55f1ad40142ecdede Mon Sep 17 00:00:00 2001
From: apio <blobs.trading@gmail.com>
Date: Sat, 22 Jul 2023 11:34:05 +0200
Subject: [PATCH] libc: Implement setbuf(), setbuffer(), and setlinebuf()

These are all simple wrappers around setvbuf().
---
 libc/include/stdio.h |  9 +++++++++
 libc/src/stdio.cpp   | 15 +++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index f8f6961d..06fbd4b9 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -191,6 +191,15 @@ extern "C"
     /* Change a file's buffering mode and internal buffer. */
     int setvbuf(FILE* stream, char* buf, int mode, size_t size);
 
+    /* Change a file's internal buffer. */
+    void setbuf(FILE* stream, char* buf);
+
+    /* Change a file's internal buffer. */
+    void setbuffer(FILE* stream, char* buf, size_t size);
+
+    /* Change a file's buffering mode to line buffered. */
+    void setlinebuf(FILE* stream);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libc/src/stdio.cpp b/libc/src/stdio.cpp
index 6e84e267..e48e2900 100644
--- a/libc/src/stdio.cpp
+++ b/libc/src/stdio.cpp
@@ -729,4 +729,19 @@ extern "C"
 
         return 0;
     }
+
+    void setbuf(FILE* stream, char* buf)
+    {
+        setvbuf(stream, buf, buf ? _IOFBF : _IONBF, BUFSIZ);
+    }
+
+    void setbuffer(FILE* stream, char* buf, size_t size)
+    {
+        setvbuf(stream, buf, buf ? _IOFBF : _IONBF, size);
+    }
+
+    void setlinebuf(FILE* stream)
+    {
+        setvbuf(stream, NULL, _IOLBF, 0);
+    }
 }