1 files changed, 7 insertions, 129 deletions

diff --git a/lib/libc/stdio/fwrite.c b/lib/libc/stdio/fwrite.c
index c21054da..8d81c7ac 100644
--- a/lib/libc/stdio/fwrite.c
+++ b/lib/libc/stdio/fwrite.c
@@ -1,134 +1,12 @@
-#include "__stdio.h" // for __FILE, _IO_ERR
-#include "stddef.h"  // for NULL
+#include <stdio.h>
 
-#include <atomic.h> // for LIBC_UNLOCK, LIBC_LOCK
-#include <errno.h>  // for errno, EOVERFLOW, EBADF, EINVAL, EIO
-#include <fcntl.h>  // for O_ACCMODE, O_RDONLY
-#include <stdio.h>  // for fflush, fwrite, BUFSIZ, FILE, _IOFBF, _IOLBF
-#include <string.h> // for memcpy, memchr
-#include <unistd.h> // for size_t, ssize_t, write
-
-char __stdout_buffer[BUFSIZ];
-void (*__stdio_cleanup)(void);
-
-size_t fwrite(const void *restrict ptr, size_t size, size_t nitems,
-	      FILE *restrict stream)
+size_t fwrite(const void *restrict ptr, size_t size, size_t nitems, FILE *restrict stream)
 {
-	size_t total_bytes;
-	size_t written = 0;
-	const char *data = (const char *)ptr;
-
-	if (ptr == NULL || stream == NULL || size == 0) {
-		if (size == 0) {
-			return nitems;
-		}
-		errno = EINVAL;
-		return 0;
-	}
-
-	if (__FILE(stream)->fd == -1 && __FILE(stream)->buf != NULL) {
-		if (__builtin_mul_overflow(size, nitems, &total_bytes)) {
-			errno = EOVERFLOW;
-			return 0;
-		}
-
-		size_t space_left =
-			__FILE(stream)->buf_size > __FILE(stream)->buf_len ?
-				__FILE(stream)->buf_size -
-					__FILE(stream)->buf_len - 1 :
-				0;
-
-		if (space_left == 0) {
-			return 0;
-		}
-
-		size_t to_copy = total_bytes < space_left ? total_bytes :
-							    space_left;
-
-		if (to_copy > 0) {
-			memcpy(__FILE(stream)->buf + __FILE(stream)->buf_len,
-			       data, to_copy);
-			__FILE(stream)->buf_len += to_copy;
-		}
-
-		return to_copy == total_bytes ? nitems : to_copy / size;
-	}
-
-	if (__builtin_mul_overflow(size, nitems, &total_bytes)) {
-		errno = EOVERFLOW;
-		return 0;
-	}
-
-	if ((__FILE(stream)->flags & O_ACCMODE) == O_RDONLY) {
-		errno = EBADF;
-		return 0;
-	}
-
-	if (__FILE(stream)->flags & _IO_ERR) {
-		errno = EIO;
-		return 0;
-	}
-
-	LIBC_LOCK(__FILE(stream)->lock);
-
-	if (__FILE(stream)->type == _IONBF) {
-		ssize_t result = write(__FILE(stream)->fd, data, total_bytes);
-		LIBC_UNLOCK(__FILE(stream)->lock);
-
-		if (result < 0) {
-			__FILE(stream)->flags |= _IO_ERR;
-			return 0;
-		}
-
-		return result == (ssize_t)total_bytes ? nitems : result / size;
-	}
-
-	size_t remaining = total_bytes;
-
-	while (remaining > 0) {
-		size_t space_available =
-			__FILE(stream)->buf_size - __FILE(stream)->buf_len;
-
-		if (space_available == 0) {
-			LIBC_UNLOCK(__FILE(stream)->lock);
-			if (fflush(stream) != 0) {
-				return written / size;
-			}
-			space_available = __FILE(stream)->buf_size;
-		}
-
-		size_t to_copy = remaining < space_available ? remaining :
-							       space_available;
-
-		memcpy(__FILE(stream)->buf + __FILE(stream)->buf_len,
-		       data + written, to_copy);
-		__FILE(stream)->buf_len += to_copy;
-		written += to_copy;
-		remaining -= to_copy;
-
-		if (__FILE(stream)->type == _IOLBF) {
-			char *newline_pos = memchr(
-				__FILE(stream)->buf + __FILE(stream)->buf_len -
-					to_copy,
-				'\n', to_copy);
-			if (newline_pos != NULL) {
-				LIBC_UNLOCK(__FILE(stream)->lock);
-				if (fflush(stream) != 0) {
-					return written / size;
-				}
-			}
-		}
-
-		else if (__FILE(stream)->type == _IOFBF &&
-			 __FILE(stream)->buf_len == __FILE(stream)->buf_size) {
-			LIBC_UNLOCK(__FILE(stream)->lock);
-			if (fflush(stream) != 0) {
-				return written / size;
-			}
-		}
-	}
+	size_t r;
 
-	LIBC_UNLOCK(__FILE(stream)->lock);
+	flockfile(stream);
+	r = fwrite_unlocked(ptr, size, nitems, stream);
+	funlockfile(stream);
 
-	return written == total_bytes ? nitems : written / size;
+	return r;
 }