1 files changed, 64 insertions, 0 deletions
diff --git a/gnu/lib/libg++/iostream/sgetline.C b/gnu/lib/libg++/iostream/sgetline.C
new file mode 100644
index 00000000000..04745969223
--- /dev/null
+++ b/gnu/lib/libg++/iostream/sgetline.C
@@ -0,0 +1,64 @@
+//    This is part of the iostream library, providing input/output for C++.
+//    Copyright (C) 1991 Per Bothner.
+//
+//    This library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Library General Public
+//    License as published by the Free Software Foundation; either
+//    version 2 of the License, or (at your option) any later version.
+//
+//    This library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Library General Public License for more details.
+//
+//    You should have received a copy of the GNU Library General Public
+//    License along with this library; if not, write to the Free
+//    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+#include "ioprivate.h"
+
+// Algorithm based on that used by Berkeley pre-4.4 fgets implementation.
+
+// Read chars into buf (of size n), until delim is seen.
+// Return number of chars read (at most n-1).
+// If extract_delim < 0, leave delimiter unread.
+// If extract_delim > 0, insert delim in output.
+
+long streambuf::sgetline(char* buf, size_t n, char delim, int extract_delim)
+{
+    register char *ptr = buf;
+    if (n <= 0)
+	return EOF;
+    n--; // Leave space for final '\0'.
+    do {
+	int len = egptr() - gptr();
+	if (len <= 0)
+	    if (underflow() == EOF)
+		break;
+	    else
+		len = egptr() - gptr();
+	if (len >= (int)n)
+	    len = n;
+	char *t = (char*)memchr((void*)_gptr, delim, len);
+	if (t != NULL) {
+	    size_t old_len = ptr-buf;
+	    len = t - _gptr;
+	    if (extract_delim >= 0) {
+		t++;
+		old_len++;
+		if (extract_delim > 0)
+		    len++;
+	    }
+	    memcpy((void*)ptr, (void*)_gptr, len);
+	    ptr[len] = 0;
+	    _gptr = t;
+	    return old_len + len;
+	}
+	memcpy((void*)ptr, (void*)_gptr, len);
+	_gptr += len;
+	ptr += len;
+	n -= len;
+    } while (n != 0);
+    *ptr = 0;
+    return ptr - buf;
+}