Fix for issue 11: Update support for mseeds with variable record

ckMseed/ckMseed.py

@@ -951,7 +951,23 @@ class MainWindow(QWidget):
                         if msfile.isMseed():
                             try:
                                 # simple test to determine if correct size file
-                                numblocks = msfile.numblocks
+                                # numblocks = msfile.numblocks
+                                filesize = msfile.filesize
+                                blksize = msfile.blksize
+                                (numblocks, odd_size) = divmod(
+                                    filesize, blksize)
+                                if odd_size:
+                                    warn = ("WARNING: File size is not an "
+                                            "integer number of block size (4096).")
+                                    warn += " Start/End times cannot be displayed."
+                                    warn += " To fix variable record length, use fixhdr."
+                                    warn1 = "\t File:" + fullname
+                                    self.write_error(warn, "Size", "red")
+                                    self.write_error(warn1, "Size")
+                                    self.add_to_dict(
+                                        self.error_dict, "Size", directory, _file)
+                                    self.num_errors = self.num_errors + 1
+
                             except Exception:
                                 err = ("ERROR: Cannot determine file and "
                                        "block sizes.")
@@ -980,12 +996,27 @@ class MainWindow(QWidget):
                             if not self.scan_type:
                                 filelist = [_file]
                             else:
-                                (startepoch, endepoch) = msfile.FirstLastTime()
-                                endepoch += 1
-                                start = lstrftime('%Y:%j:%H:%M:%S',
-                                                  lgmtime(startepoch))
-                                end = lstrftime('%Y:%j:%H:%M:%S',
-                                                lgmtime(endepoch))
+                                if odd_size:
+                                    start, end, startepoch, endepoch = ('', '', '', '')
+                                else:
+                                    try:
+                                        (startepoch, endepoch) = msfile.FirstLastTime()
+                                    except Exception as e:
+                                        err = ("ERROR: Cannot determine start and "
+                                               "end times.")
+                                        err1 = "\t File:" + fullname
+                                        self.write_error(err, "Read/Write", "red")
+                                        self.write_error(err1, "Read/Write")
+                                        self.add_to_dict(
+                                            self.error_dict, "Read/Write", directory, _file)
+                                        self.num_errors = self.num_errors + 1
+                                        continue
+
+                                    endepoch += 1
+                                    start = lstrftime('%Y:%j:%H:%M:%S',
+                                                      lgmtime(startepoch))
+                                    end = lstrftime('%Y:%j:%H:%M:%S',
+                                                    lgmtime(endepoch))
                                 if self.scan_type == 1:
                                     filelist = [_file, start, end]
                                 else:
@@ -999,14 +1030,18 @@ class MainWindow(QWidget):
                             if not self.scan_type:
                                 self.stat_chan_loc_dict[fileid] = []
                             else:
-                                try:
-                                    if startepoch < self.stat_chan_loc_dict[fileid][0][0]:
-                                        self.stat_chan_loc_dict[fileid][0][0] = startepoch
-                                    if endepoch > self.stat_chan_loc_dict[fileid][0][1]:
-                                        self.stat_chan_loc_dict[fileid][0][1] = endepoch
-                                except KeyError:
+                                if odd_size:
                                     self.stat_chan_loc_dict[fileid] = []
                                     self.stat_chan_loc_dict[fileid].append([startepoch, endepoch])
+                                else:
+                                    try:
+                                        if startepoch < self.stat_chan_loc_dict[fileid][0][0]:
+                                            self.stat_chan_loc_dict[fileid][0][0] = startepoch
+                                        if endepoch > self.stat_chan_loc_dict[fileid][0][1]:
+                                            self.stat_chan_loc_dict[fileid][0][1] = endepoch
+                                    except KeyError:
+                                        self.stat_chan_loc_dict[fileid] = []
+                                        self.stat_chan_loc_dict[fileid].append([startepoch, endepoch])
 
                             # build endian lists
                             if msfile.byteorder == "big":
@@ -1083,10 +1118,15 @@ class MainWindow(QWidget):
                 if not self.scan_type:
                     pass
                 else:
-                    start = time.strftime('%Y:%j:%H:%M:%S', time.gmtime(
-                        self.stat_chan_loc_dict[key][0][0]))
-                    end = time.strftime('%Y:%j:%H:%M:%S', time.gmtime(
-                        self.stat_chan_loc_dict[key][0][1]))
+                    # variable record length
+                    start, end = ('', '')
+                    try:
+                        start = time.strftime('%Y:%j:%H:%M:%S', time.gmtime(
+                            self.stat_chan_loc_dict[key][0][0]))
+                        end = time.strftime('%Y:%j:%H:%M:%S', time.gmtime(
+                            self.stat_chan_loc_dict[key][0][1]))
+                    except Exception as e:
+                        pass
                     scan_info.append(start)
                     scan_info.append(end)
                     # templist = list(map(str, (start, end)))