Virgin import (trimmed) of GNU Sort, textutils 2.0.21

1 files changed, 79 insertions, 0 deletions

diff --git a/contrib/gnu-sort/lib/memcoll.c b/contrib/gnu-sort/lib/memcoll.c
new file mode 100644
index 0000000..a2decfe
--- /dev/null
+++ b/contrib/gnu-sort/lib/memcoll.c
@@ -0,0 +1,79 @@
+/* Locale-specific memory comparison.
+   Copyright 1999, 2002 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* Contributed by Paul Eggert <eggert@twinsun.com>.  */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <errno.h>
+#ifndef errno
+extern int errno;
+#endif
+
+#include <sys/types.h>
+
+#if HAVE_STRING_H
+# include <string.h>
+#endif
+
+/* Compare S1 (with length S1LEN) and S2 (with length S2LEN) according
+   to the LC_COLLATE locale.  S1 and S2 do not overlap, and are not
+   adjacent.  Temporarily modify the bytes after S1 and S2, but
+   restore their original contents before returning.  Set errno to an
+   error number if there is an error, and to zero otherwise.  */
+int
+memcoll (char *s1, size_t s1len, char *s2, size_t s2len)
+{
+  int diff;
+  char n1 = s1[s1len];
+  char n2 = s2[s2len];
+
+  s1[s1len++] = '\0';
+  s2[s2len++] = '\0';
+
+  while (! (errno = 0, (diff = strcoll (s1, s2)) || errno))
+    {
+      /* strcoll found no difference, but perhaps it was fooled by NUL
+	 characters in the data.  Work around this problem by advancing
+	 past the NUL chars.  */
+      size_t size1 = strlen (s1) + 1;
+      size_t size2 = strlen (s2) + 1;
+      s1 += size1;
+      s2 += size2;
+      s1len -= size1;
+      s2len -= size2;
+
+      if (s1len == 0)
+	{
+	  if (s2len != 0)
+	    diff = -1;
+	  break;
+	}
+      else if (s2len == 0)
+	{
+	  diff = 1;
+	  break;
+	}
+    }
+
+  s1[s1len - 1] = n1;
+  s2[s2len - 1] = n2;
+
+  return diff;
+}