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-rw-r--r--jam-files/engine/pwd.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/jam-files/engine/pwd.c b/jam-files/engine/pwd.c
new file mode 100644
index 00000000..90c8eb17
--- /dev/null
+++ b/jam-files/engine/pwd.c
@@ -0,0 +1,66 @@
+/* Copyright Vladimir Prus 2002, Rene Rivera 2005. Distributed under the Boost */
+/* Software License, Version 1.0. (See accompanying */
+/* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) */
+
+#include "jam.h"
+#include "lists.h"
+#include "newstr.h"
+#include "pathsys.h"
+#include "mem.h"
+
+#include <limits.h>
+#include <errno.h>
+
+/* MinGW on windows declares PATH_MAX in limits.h */
+#if defined(NT) && ! defined(__GNUC__)
+#include <direct.h>
+#define PATH_MAX _MAX_PATH
+#else
+#include <unistd.h>
+#if defined(__COMO__)
+ #include <linux/limits.h>
+#endif
+#endif
+
+#ifndef PATH_MAX
+ #define PATH_MAX 1024
+#endif
+
+/* The current directory can't change in bjam, so optimize this to cache
+** the result.
+*/
+static char * pwd_result = NULL;
+
+
+LIST*
+pwd(void)
+{
+ if (!pwd_result)
+ {
+ int buffer_size = PATH_MAX;
+ char * result_buffer = 0;
+ do
+ {
+ char * buffer = BJAM_MALLOC_RAW(buffer_size);
+ result_buffer = getcwd(buffer,buffer_size);
+ if (result_buffer)
+ {
+ #ifdef NT
+ pwd_result = short_path_to_long_path(result_buffer);
+ #else
+ pwd_result = newstr(result_buffer);
+ #endif
+ }
+ buffer_size *= 2;
+ BJAM_FREE_RAW(buffer);
+ }
+ while (!pwd_result && errno == ERANGE);
+
+ if (!pwd_result)
+ {
+ perror("can not get current directory");
+ return L0;
+ }
+ }
+ return list_new(L0, pwd_result);
+}