Checkpointing some stuff. No way it'll build yet.

utils/cloudio/SMFileFactory.cpp

@@ -0,0 +1,91 @@
+# copy licensing stuff here
+
+#include <sys/types.h>
+#include "SMFileFactory.h"
+#include "SMComm.h"
+
+using namespace std;
+
+
+namespace idbdatafile {
+
+#define _toUint64(ptr_to_eight_bytes) *((uint64_t *) ptr_to_eight_bytes)
+
+IDBDataFile* SMFileFactory::open(const char *filename, const char *mode, uint opts, uint colWidth)
+{
+    bool _read = false;
+    bool _write = false;
+    bool at_eof = false;
+    bool create = false;
+    bool truncate = false;
+    bool append_only = false;
+    string s_filename = filename;
+
+    // strip 'b' chars from mode
+    char newmode[8] = {'\0'};  // there'd better not be 7 chars in the mode string
+    int i = 0;
+    for (char *c = mode; *c != '\0' && i < 8; c++)
+        if (*c != 'b')
+            newmode[i++] = *c;
+    if (i == 8)
+        return NULL;
+    
+    // I hate dealing with C-lib file IO.  This is ugly but fast.
+    switch (_toUint64(newmode)) {
+        case _toUint64("r\0\0\0\0\0\0\0"):
+            _read = true;
+            break;
+        case _toUint64("r+\0\0\0\0\0\0"):
+            _read = true;
+            _write = true;
+            break;
+        case _toUint64("w\0\0\0\0\0\0\0"):
+            _write = true;
+            truncate = true;
+            create = true;
+            break;
+        case _toUint64("w+\0\0\0\0\0\0"):
+            _read = true;
+            _write = true;
+            truncate = true;
+            create = true;
+            break;
+        case _toUint64("a\0\0\0\0\0\0\0"):
+            _write = true;
+            create = true;
+            at_eof = true;
+            break;
+        case _toUint64("a+\0\0\0\0\0\0"):
+            _read = true;
+            _write = true;
+            create = true;
+            append_only = true;
+            break;
+        default:
+            return NULL;
+    }
+    
+    uint posix_flags = 0;
+    if (_read && write)
+        posix_flags |= O_RDWR;
+    else if (_read)
+        posix_flags |= O_RDONLY;
+    else if (_write)
+        posix_flags |= O_WRONLY;
+        
+    posix_flags |= (create ? O_CREAT : 0);
+    posix_flags |= (truncate ? O_TRUNC : 0);
+    posix_flage |= (at_eof ? O_APPEND : 0);
+    
+    SMComm *comm = SMComm::get();
+    struct stat _stat;
+    int err = comm->open(s_filename, posix_flags, &stat);
+    if (!err)
+        return NULL;
+        
+    SMDataFile *ret = new SMDataFile(s_filename, posix_flags, append_only, stat);
+    return ret;
+}
+
+
+}