New module 'dummy'.

[gnulib.git] / lib / path-concat.c

diff --git a/lib/path-concat.c b/lib/path-concat.c
index d6dafc9..db96deb 100644 (file)
--- a/lib/path-concat.c
+++ b/lib/path-concat.c
@@ -1,5 +1,7 @@
 /* path-concat.c -- concatenate two arbitrary pathnames
-   Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+
+   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 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
@@ -21,31 +23,24 @@
 # include <config.h>
 #endif
 
+/* Specification.  */
+#include "path-concat.h"
+
 #ifndef HAVE_MEMPCPY
 # define mempcpy(D, S, N) ((void *) ((char *) memcpy (D, S, N) + (N)))
 #endif
 
 #include <stdio.h>
-#if HAVE_STRING_H
-# include <string.h>
-#endif
-#include <sys/types.h>
+#include <stdlib.h>
+#include <string.h>
 
-char *malloc ();
-#ifndef strdup
-char *strdup ();
-#endif
-
-#ifndef DIRECTORY_SEPARATOR
-# define DIRECTORY_SEPARATOR '/'
-#endif
-
-#ifndef ISSLASH
-# define ISSLASH(C) ((C) == DIRECTORY_SEPARATOR)
+#if HAVE_UNISTD_H
+# include <unistd.h>
 #endif
 
+#include "strdup.h"
+#include "dirname.h"
 #include "xalloc.h"
-#include "path-concat.h"
 
 /* Concatenate two pathname components, DIR and BASE, in
    newly-allocated storage and return the result.  Return 0 if out of
@@ -65,8 +60,8 @@ path_concat (const char *dir, const char *base, char **base_in_result)
 {
   char *p;
   char *p_concat;
-  size_t base_len;
-  size_t dir_len;
+  size_t baselen;
+  size_t dirlen;
 
   if (!dir)
     {
@@ -77,27 +72,28 @@ path_concat (const char *dir, const char *base, char **base_in_result)
     }
 
   /* DIR is not empty. */
-  base_len = strlen (base);
-  dir_len = strlen (dir);
+  baselen = base_len (base);
+  dirlen = strlen (dir);
 
-  p_concat = malloc (dir_len + base_len + 2);
+  p_concat = malloc (dirlen + baselen + 2);
   if (!p_concat)
     return 0;
 
-  p = mempcpy (p_concat, dir, dir_len);
+  p = mempcpy (p_concat, dir, dirlen);
 
-  if (dir_len > 0)
+  if (FILESYSTEM_PREFIX_LEN (dir) < dirlen)
     {
-      if (ISSLASH (*(p - 1)) && ISSLASH(*base))
+      if (ISSLASH (*(p - 1)) && ISSLASH (*base))
        --p;
-      else if (!ISSLASH (*(p - 1)) && !ISSLASH(*base))
+      else if (!ISSLASH (*(p - 1)) && !ISSLASH (*base))
        *p++ = DIRECTORY_SEPARATOR;
     }
 
   if (base_in_result)
     *base_in_result = p;
 
-  memcpy (p, base, base_len + 1);
+  memcpy (p, base, baselen);
+  p[baselen] = '\0';
 
   return p_concat;
 }
@@ -108,7 +104,7 @@ char *
 xpath_concat (const char *dir, const char *base, char **base_in_result)
 {
   char *res = path_concat (dir, base, base_in_result);
-  if (res)
-    return res;
-  xalloc_die ();
+  if (! res)
+    xalloc_die ();
+  return res;
 }