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authorManuel Novoa III <mjn3@codepoet.org>2004-02-11 23:48:50 +0000
committerManuel Novoa III <mjn3@codepoet.org>2004-02-11 23:48:50 +0000
commit082e680bd54e999f2bb4eb77141958938b1e9ee9 (patch)
tree203c45b85ca608e1550d8ffc459456fc9cf0b30b /libc/stdio/fopencookie.c
parent17c21765b4a97c6f0b74ba8466073e5a3f97cdee (diff)
New stdio core. Should be more maintainable. Fixes a couple of bugs.
Codepaths streamlined. Improved performance for nonthreaded apps when linked with a thread-enabled libc. Minor iconv bug and some locale/thread related startup issues fixed. These showed up in getting a gcj-compiled java helloworld app running. Removed some old extension functions... _stdio_fdout and _stdio_fsfopen.
Diffstat (limited to 'libc/stdio/fopencookie.c')
-rw-r--r--libc/stdio/fopencookie.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/libc/stdio/fopencookie.c b/libc/stdio/fopencookie.c
new file mode 100644
index 000000000..73a5a028a
--- /dev/null
+++ b/libc/stdio/fopencookie.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#include "_stdio.h"
+
+#ifndef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
+#error no custom streams!
+#endif
+
+/* NOTE: GLIBC difference!!! -- fopencookie
+ * According to the info pages, glibc allows seeking within buffers even if
+ * no seek function is supplied. We don't. */
+
+/* NOTE: GLIBC difference!!! -- fopencookie
+ * When compiled without large file support, the offset pointer for the
+ * cookie_seek function is off_t * and not off64_t * as for glibc. */
+
+/* NOTE: GLIBC difference!!! -- fopencookie (bcc only)
+ * Since bcc doesn't support passing of structs, we define fopencookie as a
+ * macro in terms of _fopencookie which takes a struct * for the io functions
+ * instead.
+ */
+
+/* Currently no real reentrancy issues other than a possible double close(). */
+
+#ifndef __BCC__
+FILE *fopencookie(void * __restrict cookie, const char * __restrict mode,
+ cookie_io_functions_t io_functions)
+#else
+FILE *_fopencookie(void * __restrict cookie, const char * __restrict mode,
+ register cookie_io_functions_t *io_functions)
+#endif
+{
+ FILE *stream;
+
+ /* Fake an fdopen guaranteed to pass the _stdio_fopen basic agreement
+ * check without an fcntl call. */
+ stream = _stdio_fopen(((intptr_t)(INT_MAX-1)), mode, NULL, INT_MAX);
+ if (stream) {
+ stream->__filedes = -1;
+#ifndef __BCC__
+ stream->__gcs = io_functions;
+#else
+ stream->__gcs.read = io_functions->read;
+ stream->__gcs.write = io_functions->write;
+ stream->__gcs.seek = io_functions->seek;
+ stream->__gcs.close = io_functions->close;
+#endif
+ stream->__cookie = cookie;
+
+ __STDIO_STREAM_VALIDATE(stream);
+ }
+
+ return stream;
+}