1 files changed, 133 insertions, 0 deletions
diff --git a/vere/ext/nasm/nasmlib/realpath.c b/vere/ext/nasm/nasmlib/realpath.c
new file mode 100644
index 0000000..eaa148a
--- /dev/null
+++ b/vere/ext/nasm/nasmlib/realpath.c
@@ -0,0 +1,133 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2016 The NASM Authors - All Rights Reserved
+ *   See the file AUTHORS included with the NASM distribution for
+ *   the specific copyright holders.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following
+ *   conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *
+ *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * realpath.c	As system-independent as possible implementation of realpath()
+ */
+
+#include "compiler.h"
+
+#include <errno.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+#include "nasmlib.h"
+
+#ifdef HAVE_CANONICALIZE_FILE_NAME
+
+/*
+ * GNU-specific, but avoids the realpath(..., NULL)
+ * portability problem if it exists.
+ */
+char *nasm_realpath(const char *rel_path)
+{
+    char *rp = canonicalize_file_name(rel_path);
+    return rp ? rp : nasm_strdup(rel_path);
+}
+
+#elif defined(HAVE_REALPATH)
+
+/*
+ * POSIX.1-2008 defines realpath(..., NULL); POSIX.1-2001 doesn't guarantee
+ * that a NULL second argument is supported.
+ */
+
+char *nasm_realpath(const char *rel_path)
+{
+    char *rp;
+
+    rp = realpath(rel_path, NULL);
+
+    /* Not all implementations of realpath() support a NULL second argument */
+    if (!rp && errno == EINVAL) {
+        long path_max = -1;
+        char *rp;
+
+#if defined(HAVE_PATHCONF) && defined(_PC_PATH_MAX)
+        path_max = pathconf(rel_path, _PC_PATH_MAX); /* POSIX */
+#endif
+
+        if (path_max < 0) {
+#ifdef PATH_MAX
+            path_max = PATH_MAX;    /* SUSv2 */
+#elif defined(MAXPATHLEN)
+            path_max = MAXPATHLEN;  /* Solaris */
+#else
+            path_max = 65536;    /* Crazily high, we hope */
+#endif
+        }
+
+        rp = nasm_malloc(path_max);
+
+        if (!realpath(rel_path, rp)) {
+            nasm_free(rp);
+            rp = NULL;
+        } else {
+            /* On some systems, pathconf() can return a very large value */
+
+            rp[path_max - 1] = '\0'; /* Just in case overrun is possible */
+            rp = nasm_realloc(rp, strlen(rp) + 1);
+        }
+    }
+
+    return rp ? rp : nasm_strdup(rel_path);
+}
+
+#elif defined(HAVE__FULLPATH)
+
+/*
+ * win32/win64 API
+ */
+
+char *nasm_realpath(const char *rel_path)
+{
+    char *rp = _fullpath(NULL, rel_path, 0);
+    return rp ? rp : nasm_strdup(rel_path);
+}
+
+#else
+
+/*
+ * There is nothing we know how to do here, so hope it just works anyway.
+ */
+
+char *nasm_realpath(const char *rel_path)
+{
+    return nasm_strdup(rel_path);
+}
+
+#endif