1 files changed, 97 insertions, 0 deletions
diff --git a/lib/libc/iconv/citrus_mmap.c b/lib/libc/iconv/citrus_mmap.c
new file mode 100644
index 0000000..dd5d059
--- /dev/null
+++ b/lib/libc/iconv/citrus_mmap.c
@@ -0,0 +1,97 @@
+/* $FreeBSD$ */
+/* $NetBSD: citrus_mmap.c,v 1.3 2005/01/19 00:52:37 mycroft Exp $ */
+
+/*-
+ * Copyright (c)2003 Citrus Project,
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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 AUTHOR 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 AUTHOR 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.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "citrus_namespace.h"
+#include "citrus_region.h"
+#include "citrus_mmap.h"
+
+int
+_citrus_map_file(struct _citrus_region * __restrict r,
+    const char * __restrict path)
+{
+	struct stat st;
+	void *head;
+	int fd, ret;
+
+	ret = 0;
+
+	_region_init(r, NULL, 0);
+
+	if ((fd = open(path, O_RDONLY)) == -1)
+		return (errno);
+	if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) {
+		ret = errno;
+		goto error;
+	}
+
+	if (fstat(fd, &st)  == -1) {
+		ret = errno;
+		goto error;
+	}
+	if (!S_ISREG(st.st_mode)) {
+		ret = EOPNOTSUPP;
+		goto error;
+	}
+
+	head = mmap(NULL, (size_t)st.st_size, PROT_READ, MAP_FILE|MAP_PRIVATE,
+	    fd, (off_t)0);
+	if (head == MAP_FAILED) {
+		ret = errno;
+		goto error;
+	}
+	_region_init(r, head, (size_t)st.st_size);
+
+error:
+	(void)close(fd);
+	return (ret);
+}
+
+void
+_citrus_unmap_file(struct _citrus_region *r)
+{
+
+	if (_region_head(r) != NULL) {
+		(void)munmap(_region_head(r), _region_size(r));
+		_region_init(r, NULL, 0);
+	}
+}