1 files changed, 66 insertions, 0 deletions
diff --git a/libc/stdio/_READ.c b/libc/stdio/_READ.c
new file mode 100644
index 000000000..7d3c38ce6
--- /dev/null
+++ b/libc/stdio/_READ.c
@@ -0,0 +1,66 @@
+/* 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"
+
+/* Given a reading stream without its end-of-file indicator set and
+ * with no buffered input or ungots, read at most 'bufsize' bytes
+ * into 'buf' (which may be the stream's __bufstart).
+ * If a read error occurs, set the stream's error indicator.
+ * If EOF is encountered, set the stream's end-of-file indicator.
+ *
+ * Returns the number of bytes read, even in EOF and error cases.
+ *
+ * Notes:
+ *   Calling with bufsize == 0 is NOT permitted (unlike __stdio_WRITE).
+ *   NOT THREADSAFE!  Assumes stream already locked if necessary.
+ */
+
+size_t __stdio_READ(register FILE *stream,
+					unsigned char *buf, size_t bufsize)
+{
+	ssize_t rv = 0;
+
+	__STDIO_STREAM_VALIDATE(stream);
+	assert(stream->__filedes >= -1);
+	assert(__STDIO_STREAM_IS_READING(stream));
+	assert(!__STDIO_STREAM_BUFFER_RAVAIL(stream)); /* Buffer must be empty. */
+	assert(!(stream->__modeflags & __FLAG_UNGOT));
+	assert(bufsize);
+
+	if (!__FEOF_UNLOCKED(stream)) {
+		if (bufsize > SSIZE_MAX) {
+			bufsize = SSIZE_MAX;
+		}
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning EINTR?
+#endif
+/* 	RETRY: */
+		if ((rv = __READ(stream, buf, bufsize)) <= 0) {
+			if (rv == 0) {
+				__STDIO_STREAM_SET_EOF(stream);
+			} else {
+/* 				if (errno == EINTR) goto RETRY; */
+				__STDIO_STREAM_SET_ERROR(stream);
+				rv = 0;
+			}
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning TODO: Make custom stream read return check optional.
+#endif
+#ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
+		} else {
+			assert(rv <= bufsize);
+			if (rv > bufsize) {	/* Read more than bufsize! */
+				abort();
+			}
+#endif
+		}
+	}
+
+	return rv;
+}