1 files changed, 105 insertions, 0 deletions
diff --git a/tksao/fitsy++/smmap.C b/tksao/fitsy++/smmap.C
new file mode 100644
index 0000000..e1c1fcc
--- /dev/null
+++ b/tksao/fitsy++/smmap.C
@@ -0,0 +1,105 @@
+// Copyright (C) 1999-2016
+// Smithsonian Astrophysical Observatory, Cambridge, MA, USA
+// For conditions of distribution and use, see copyright notice in "copyright"
+
+#include "smmap.h"
+
+#ifndef __WIN32
+
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+FitsSMMap::FitsSMMap(const char* hdr, const char* fn)
+{
+  // reset
+  valid_ =0;
+
+  // header
+  {
+    // Map the header.
+    int file = open(hdr, O_RDONLY);
+    if (file == -1)
+      return;
+
+    struct stat info;
+    if (fstat(file, &info) < 0)
+      return;
+
+    // check for empty file
+    if (info.st_size == 0)
+      return;
+
+    // map it
+    hmapsize_ = info.st_size;
+    hmapdata_ = (char*)mmap(NULL, hmapsize_, PROT_READ, MAP_SHARED, file, 0);
+
+    // close the file
+    close(file);
+
+    // are we valid?
+    if ((long)hmapdata_ == -1)
+      return;
+  }
+
+  // data
+  {
+    // parse the fn and options
+    parse(fn);
+    if (!valid_)
+      return;
+
+    // reset
+    valid_ =0;
+
+    if (!pName_)
+      return;
+
+    // Map the file.
+    int file = open(pName_, O_RDONLY);
+    if (file == -1)
+      return;
+
+    struct stat info;
+    if (fstat(file, &info) < 0)
+      return;
+
+    // check for empty file
+    if (info.st_size == 0)
+      return;
+
+    // map it
+    mapsize_ = info.st_size;
+    mapdata_ = (char*)mmap(NULL, mapsize_, PROT_READ, MAP_SHARED, file, 0);
+
+    // close the file
+    close(file);
+
+    // are we valid?
+    if ((long)mapdata_ == -1)
+      return;
+  }
+
+  // so far, so good
+  valid_ = 1;
+}
+
+FitsSMMap::~FitsSMMap()
+{
+  if (mapdata_>0)
+    munmap((caddr_t)mapdata_, mapsize_);
+}
+
+#else
+
+FitsSMMap::FitsSMMap(const char* hdr, const char* fn)
+{
+  valid_ =0;
+}
+
+FitsSMMap::~FitsSMMap() {}
+
+#endif