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-rw-r--r--src/logic/amgc_map_input.c51
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);
+}