1 files changed, 51 insertions, 0 deletions
diff --git a/src/logic/amgc_map_input.c b/src/logic/amgc_map_input.c
new file mode 100644
index 0000000..0499c35
--- /dev/null
+++ b/src/logic/amgc_map_input.c
@@ -0,0 +1,51 @@
+/**********************************************************/
+/*  apimagic: cparser-based API normalization utility     */
+/*  Copyright (C) 2015--2016  Z. Gilboa                   */
+/*  Released under GPLv2 and GPLv3; see COPYING.APIMAGIC. */
+/**********************************************************/
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <apimagic/apimagic.h>
+
+int amgc_map_input(
+	int			fd,
+	const char *		path,
+	int			prot,
+	struct amgc_input *	map)
+{
+	struct stat	stat;
+	bool		fnew;
+	int		ret;
+
+	if ((fnew = (fd < 0)))
+		fd  = open(path,O_RDONLY | O_CLOEXEC);
+
+	if (fd < 0)
+		return -1;
+
+	if ((ret = fstat(fd,&stat) < 0) && fnew)
+		close(fd);
+
+	if (ret < 0)
+		return -1;
+
+	map->size = stat.st_size;
+	map->addr = mmap(0,map->size,prot,MAP_PRIVATE,fd,0);
+
+	if (fnew)
+		close(fd);
+
+	return (map->addr == MAP_FAILED) ? -1 : 0;
+}
+
+int amgc_unmap_input(struct amgc_input * map)
+{
+	return munmap(map->addr,map->size);
+}