1 files changed, 111 insertions, 0 deletions
diff --git a/src/filter_observer.cc b/src/filter_observer.cc
new file mode 100644
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--- /dev/null
+++ b/src/filter_observer.cc
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+/**
+ * Copyright (c) 2019, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "filter_observer.hh"
+
+#include "config.h"
+#include "log_format.hh"
+
+void
+line_filter_observer::logline_new_lines(const logfile& lf,
+                                        logfile::const_iterator ll_begin,
+                                        logfile::const_iterator ll_end,
+                                        shared_buffer_ref& sbr)
+{
+    size_t offset = std::distance(lf.begin(), ll_begin);
+
+    require(&lf == this->lfo_filter_state.tfs_logfile.get());
+
+    this->lfo_filter_state.resize(lf.size());
+    if (this->lfo_filter_stack.empty()) {
+        return;
+    }
+
+    for (; ll_begin != ll_end; ++ll_begin) {
+        if (lf.get_format() != nullptr) {
+            lf.get_format()->get_subline(*ll_begin, sbr);
+        }
+        for (auto& filter : this->lfo_filter_stack) {
+            if (filter->lf_deleted) {
+                continue;
+            }
+            if (offset
+                >= this->lfo_filter_state.tfs_filter_count[filter->get_index()])
+            {
+                filter->add_line(this->lfo_filter_state, ll_begin, sbr);
+            }
+        }
+    }
+}
+
+void
+line_filter_observer::logline_eof(const logfile& lf)
+{
+    for (auto& iter : this->lfo_filter_stack) {
+        if (iter->lf_deleted) {
+            continue;
+        }
+        iter->end_of_message(this->lfo_filter_state);
+    }
+}
+
+size_t
+line_filter_observer::get_min_count(size_t max) const
+{
+    size_t retval = max;
+
+    for (auto& filter : this->lfo_filter_stack) {
+        if (filter->lf_deleted) {
+            continue;
+        }
+        retval = std::min(
+            retval,
+            this->lfo_filter_state.tfs_filter_count[filter->get_index()]);
+    }
+
+    return retval;
+}
+
+void
+line_filter_observer::clear_deleted_filter_state()
+{
+    uint32_t used_mask = 0;
+
+    for (auto& filter : this->lfo_filter_stack) {
+        if (filter->lf_deleted) {
+            log_debug("skipping deleted %p %d %d",
+                      filter.get(),
+                      filter->get_index(),
+                      filter->get_lang());
+            continue;
+        }
+        used_mask |= (1UL << filter->get_index());
+    }
+    this->lfo_filter_state.clear_deleted_filter_state(used_mask);
+}