Added SessionHeaderParser for faster session xml file content searching.

1 files changed, 178 insertions, 0 deletions

diff --git a/server/src/sessionheaderparser.cc b/server/src/sessionheaderparser.cc
new file mode 100644
index 0000000..93bd80b
--- /dev/null
+++ b/server/src/sessionheaderparser.cc
@@ -0,0 +1,178 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set et sw=2 ts=2: */
+/***************************************************************************
+ *            sessionheaderparser.cc
+ *
+ *  Thu Aug  9 09:06:32 CEST 2012
+ *  Copyright 2012 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of Pracro.
+ *
+ *  Pracro is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Pracro is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Pracro; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "sessionheaderparser.h"
+
+/*
+<session timestamp="1234567890"
+         status="readonly""
+         id="12345"
+         template="amd_forunders"
+         patientid="0000000000">
+   ...
+</session>
+*/
+
+#include <stdio.h>
+
+// For assert
+#include <assert.h>
+
+// For open and friends
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+// For vprintf and friends
+#include <stdarg.h>
+
+#include <errno.h>
+#include <string.h>
+
+#include "debug.h"
+#include "configuration.h"
+#include "exception.h"
+
+void SessionHeaderParser::error(const char* fmt, ...)
+{
+  ERR_LOG(session, "Error in SessionHeaderParser: ");
+
+  {
+    va_list argp;
+    va_start(argp, fmt);
+    ERR_LOG_VA(session, fmt, argp);
+    va_end(argp);
+
+    fprintf(stderr, "\n");
+  }
+
+  {
+    char *p;
+    va_list argp;
+    va_start(argp, fmt);
+    if(vasprintf(&p, fmt, argp) != -1) {
+      throw Exception("Error in SessionHeaderParser: " + std::string(p));
+      free(p);
+    }
+    va_end(argp);
+  }
+
+}
+
+SessionHeaderParser::SessionHeaderParser(std::string sessionfile)
+{
+  done = false;
+
+  file = sessionfile;
+
+  DEBUG(session, "Using session file: %s\n", sessionfile.c_str());
+
+  fd = open(sessionfile.c_str(), O_RDONLY);
+  if(fd == -1) error("Could not open file %s", sessionfile.c_str());
+}
+
+SessionHeaderParser::~SessionHeaderParser()
+{
+  if(fd != -1) close(fd);
+}
+
+void SessionHeaderParser::startTag(std::string name, attributes_t &attr)
+{
+  if(done) return;
+
+  if(name == "session") {
+    done = true;
+    if(attr.find("patientid") != attr.end()) patientid = attr["patientid"];
+    if(attr.find("template") != attr.end()) templ = attr["template"];
+  } else {
+    throw Exception("Missing root tag 'session' - found '" + name + "'");
+  }
+}
+
+int SessionHeaderParser::readData(char *data, size_t size)
+{
+  if(done) return 0; // If done is true we already found what we were looking
+                     //  for and can dismiss the rest of the document.
+
+  if(fd == -1) {
+    ERR_LOG(session, "Invalid file descriptor.\n");
+    return 0;
+  }
+  ssize_t r = read(fd, data, size);
+  if(r == -1) {
+    ERR_LOG(session, "Could not read...%s\n", strerror(errno));
+    return 0;
+  }
+  return r;
+}
+
+void SessionHeaderParser::parseError(const char *buf, size_t len, std::string error, int lineno)
+{
+  if(done) return; // If done is true we already found what we were looking
+                   //  for and can dismiss the rest of the document.
+
+  ERR_LOG(session, "SessionHeaderParser[%s] error at line %d: %s\n",
+          file.c_str(), lineno, error.c_str());
+  ERR_LOG(session, "\tBuffer %u bytes: [", len);
+  if(fwrite(buf, len, 1, stderr) != len) {}
+  ERR_LOG(session, "]\n");
+
+  char *slineno;
+  if(asprintf(&slineno, " at line %d\n", lineno) != -1) {
+    throw Exception(error + slineno);
+    free(slineno);
+  }
+}
+
+std::string SessionHeaderParser::getPatientID()
+{
+  return patientid;
+}
+
+std::string SessionHeaderParser::getTemplate()
+{
+  return templ;
+}
+
+#ifdef TEST_SESSIONHEADERPARSER
+//Additional dependency files
+//deps:
+//Required cflags (autoconf vars may be used)
+//cflags:
+//Required link options (autoconf vars may be used)
+//libs:
+#include "test.h"
+
+TEST_BEGIN;
+
+// TODO: Put some testcode here (see test.h for usable macros).
+TEST_TRUE(false, "No tests yet!");
+
+TEST_END;
+
+#endif/*TEST_SESSIONHEADERPARSER*/