1 files changed, 23 insertions, 0 deletions
diff --git a/src/libstddjb/cdb_init_map.c b/src/libstddjb/cdb_init_map.c
new file mode 100644
index 0000000..bf8eb9d
--- /dev/null
+++ b/src/libstddjb/cdb_init_map.c
@@ -0,0 +1,23 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <skalibs/cdb.h>
+
+int cdb_init_map (struct cdb *c, int fd, int domap)
+{
+  if (domap)
+  {
+    struct stat st ;
+    char *map ;
+    if (fstat(fd, &st) < 0) return 0 ;
+    map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0) ;
+    if (map == MAP_FAILED) return 0 ;
+    c->fd = -fd-2 ;
+    c->map = map ;
+    c->size = st.st_size ;
+  }
+  else c->fd = fd ;
+  return 1 ;
+}