From a769c765cfaf1e930d973fab3907fa10ebb3f50b Mon Sep 17 00:00:00 2001
From: erg <devnull@localhost>
Date: Thu, 3 May 2007 19:09:15 +0000
Subject: [PATCH] Add modifications for ast to build on Windows

---
 lib/ast/compat_unistd.h | 51 +++++++++++++++++++++++++++++++++++++++++
 lib/ast/pathaccess.c    |  4 ++++
 lib/ast/pathexists.c    |  3 +++
 lib/ast/pathfind.c      |  2 ++
 lib/ast/pathgetlink.c   |  8 ++++++-
 5 files changed, 67 insertions(+), 1 deletion(-)
 create mode 100644 lib/ast/compat_unistd.h

diff --git a/lib/ast/compat_unistd.h b/lib/ast/compat_unistd.h
new file mode 100644
index 000000000..09087dfd0
--- /dev/null
+++ b/lib/ast/compat_unistd.h
@@ -0,0 +1,51 @@
+/* $Id$ $Revision$ */
+/* vim:set shiftwidth=4 ts=8: */
+
+/**********************************************************
+*      This software is part of the graphviz package      *
+*                http://www.graphviz.org/                 *
+*                                                         *
+*            Copyright (c) 1994-2004 AT&T Corp.           *
+*                and is licensed under the                *
+*            Common Public License, Version 1.0           *
+*                      by AT&T Corp.                      *
+*                                                         *
+*        Information and Software Systems Research        *
+*              AT&T Research, Florham Park NJ             *
+**********************************************************/
+
+#ifndef UNISTD_H
+#define UNISTD_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define	F_OK	0
+#define	R_OK	4
+#define	W_OK	2
+#define	X_OK	1
+
+#define      S_ISDIR(m)      (((m) & 0170000) == 0040000) 
+
+#define	S_IRWXU 	(S_IRUSR | S_IWUSR | S_IXUSR)
+#define		S_IRUSR	0000400	/* read permission, owner */
+#define		S_IWUSR	0000200	/* write permission, owner */
+#define		S_IXUSR 0000100/* execute/search permission, owner */
+#define	S_IRWXG		(S_IRGRP | S_IWGRP | S_IXGRP)
+#define		S_IRGRP	0000040	/* read permission, group */
+#define		S_IWGRP	0000020	/* write permission, grougroup */
+#define		S_IXGRP 0000010/* execute/search permission, group */
+#define	S_IRWXO		(S_IROTH | S_IWOTH | S_IXOTH)
+#define		S_IROTH	0000004	/* read permission, other */
+#define		S_IWOTH	0000002	/* write permission, other */
+#define		S_IXOTH 0000001/* execute/search permission, other */
+
+extern int access (const char*, int);
+extern char* getcwd (char*, int);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/ast/pathaccess.c b/lib/ast/pathaccess.c
index 5541f3fed..0d7077bc1 100644
--- a/lib/ast/pathaccess.c
+++ b/lib/ast/pathaccess.c
@@ -26,7 +26,11 @@
  */
 
 #include <ast.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#else
+#include <compat_unistd.h>
+#endif
 #include <sys/types.h>
 #include <sys/stat.h>
 
diff --git a/lib/ast/pathexists.c b/lib/ast/pathexists.c
index 3e795dfe5..eb8489769 100644
--- a/lib/ast/pathexists.c
+++ b/lib/ast/pathexists.c
@@ -30,6 +30,9 @@
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#ifdef WIN32
+#include <compat_unistd.h>
+#endif
 /* #include "lclib.h" */
 /* #include <ls.h> */
 
diff --git a/lib/ast/pathfind.c b/lib/ast/pathfind.c
index cd598f719..c1d1a61c1 100644
--- a/lib/ast/pathfind.c
+++ b/lib/ast/pathfind.c
@@ -27,6 +27,8 @@
 #include <ast.h>
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#else
+#include <compat_unistd.h>
 #endif
 #ifdef HAVE_STRINGS_H
 #include <strings.h>
diff --git a/lib/ast/pathgetlink.c b/lib/ast/pathgetlink.c
index 7a666b6a9..754625df8 100644
--- a/lib/ast/pathgetlink.c
+++ b/lib/ast/pathgetlink.c
@@ -31,7 +31,9 @@
 #endif
 
 #ifdef HAVE_UNISTD_H
-# include <unistd.h>
+#include <unistd.h>
+#else
+#include <compat_unistd.h>
 #endif
 
 /*
@@ -41,6 +43,9 @@
 
 int pathgetlink(const char *name, char *buf, int siz)
 {
+#ifdef WIN32
+	return (-1);
+#else
     int n;
 
     if ((n = readlink(name, buf, siz)) < 0)
@@ -94,4 +99,5 @@ int pathgetlink(const char *name, char *buf, int siz)
     }
 #endif
     return (n);
+#endif
 }
-- 
2.40.0