Add Socket Libraries.

[mirror_edk2.git] / StdLib / PosixLib / Gen / dirname.c

diff --git a/StdLib/PosixLib/Gen/dirname.c b/StdLib/PosixLib/Gen/dirname.c
new file mode 100644 (file)
index 0000000..7fb4d39
--- /dev/null
+++ b/StdLib/PosixLib/Gen/dirname.c
@@ -0,0 +1,88 @@
+/** @file\r
+\r
+ * Copyright (c) 1997, 2002 The NetBSD Foundation, Inc.\r
+ * All rights reserved.\r
+ *\r
+ * This code is derived from software contributed to The NetBSD Foundation\r
+ * by Klaus Klein and Jason R. Thorpe.\r
+ *\r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions\r
+ * are met:\r
+ * 1. Redistributions of source code must retain the above copyright\r
+ *    notice, this list of conditions and the following disclaimer.\r
+ * 2. Redistributions in binary form must reproduce the above copyright\r
+ *    notice, this list of conditions and the following disclaimer in the\r
+ *    documentation and/or other materials provided with the distribution.\r
+ *\r
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS\r
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED\r
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\r
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS\r
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r
+ * POSSIBILITY OF SUCH DAMAGE.\r
+\r
+    NetBSD: dirname.c,v 1.10 2008/05/10 22:39:40 christos Exp\r
+ */\r
+#include  <LibConfig.h>\r
+\r
+#include <sys/cdefs.h>\r
+\r
+//#include "namespace.h"\r
+//#include <libgen.h>\r
+#include <limits.h>\r
+#include <string.h>\r
+\r
+#ifdef __weak_alias\r
+__weak_alias(dirname,_dirname)\r
+#endif\r
+\r
+#if !HAVE_DIRNAME\r
+char *\r
+dirname(char *path)\r
+{\r
+  static char singledot[] = ".";\r
+  static char result[PATH_MAX];\r
+  const char *lastp;\r
+  size_t len;\r
+\r
+  /*\r
+   * If `path' is a null pointer or points to an empty string,\r
+   * return a pointer to the string ".".\r
+   */\r
+  if ((path == NULL) || (*path == '\0'))\r
+    return (singledot);\r
+\r
+  /* Strip trailing slashes, if any. */\r
+  lastp = path + strlen(path) - 1;\r
+  while (lastp != path && *lastp == '/')\r
+    lastp--;\r
+\r
+  /* Terminate path at the last occurence of '/'. */\r
+  do {\r
+    if (*lastp == '/') {\r
+      /* Strip trailing slashes, if any. */\r
+      while (lastp != path && *lastp == '/')\r
+        lastp--;\r
+\r
+      /* ...and copy the result into the result buffer. */\r
+      len = (lastp - path) + 1 /* last char */;\r
+      if (len > (PATH_MAX - 1))\r
+        len = PATH_MAX - 1;\r
+\r
+      memcpy(result, path, len);\r
+      result[len] = '\0';\r
+\r
+      return (result);\r
+    }\r
+  } while (--lastp >= path);\r
+\r
+  /* No /'s found, return a pointer to the string ".". */\r
+  return (singledot);\r
+}\r
+#endif\r