1 files changed, 84 insertions, 0 deletions
diff --git a/libc/stdio/fgets.c b/libc/stdio/fgets.c
new file mode 100644
index 000000000..6bcfc2957
--- /dev/null
+++ b/libc/stdio/fgets.c
@@ -0,0 +1,84 @@
+/* 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"
+
+#ifdef __DO_UNLOCKED
+
+weak_alias(__fgets_unlocked,fgets_unlocked);
+#ifndef __UCLIBC_HAS_THREADS__
+weak_alias(__fgets_unlocked,fgets);
+#endif
+
+
+char *__fgets_unlocked(char *__restrict s, int n,
+					   register FILE * __restrict stream)
+{
+	register char *p;
+	int c;
+
+	__STDIO_STREAM_VALIDATE(stream);
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning CONSIDER: What should fgets do if n <= 0?
+#endif /* __UCLIBC_MJN3_ONLY__ */
+	/* Should we assert here?  Or set errno?  Or just fail... */
+	if (n <= 0) {
+/* 		__set_errno(EINVAL); */
+		goto ERROR;
+	}
+
+	p = s;
+
+	while (--n) {
+		if (__STDIO_STREAM_CAN_USE_BUFFER_GET(stream)) {
+			if ((*p++ = __STDIO_STREAM_BUFFER_GET(stream)) == '\n') {
+				break;
+			}
+		} else {
+			if ((c = __fgetc_unlocked(stream)) == EOF) {
+				if (__FERROR_UNLOCKED(stream)) {
+					goto ERROR;
+				}
+				break;
+			}
+			if ((*p++ = c) == '\n') {
+				break;
+			}
+		}
+	}
+
+#ifdef __UCLIBC_MJN3_ONLY__
+#warning CONSIDER: If n==1 and not at EOF, should fgets return an empty string?
+#endif /* __UCLIBC_MJN3_ONLY__ */
+	if (p > s) {
+		*p = 0;
+		return s;
+	}
+
+ ERROR:
+	return NULL;
+}
+
+#elif defined __UCLIBC_HAS_THREADS__
+
+char *fgets(char *__restrict s, int n,
+			register FILE * __restrict stream)
+{
+	char *retval;
+	__STDIO_AUTO_THREADLOCK_VAR;
+
+	__STDIO_AUTO_THREADLOCK(stream);
+
+	retval = __fgets_unlocked(s, n, stream);
+
+	__STDIO_AUTO_THREADUNLOCK(stream);
+
+	return retval;
+}
+
+#endif