1 files changed, 147 insertions, 0 deletions
diff --git a/src/base/lnav_log.hh b/src/base/lnav_log.hh
new file mode 100644
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+++ b/src/base/lnav_log.hh
@@ -0,0 +1,147 @@
+/**
+ * Copyright (c) 2014, 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.
+ *
+ * @file lnav_log.hh
+ */
+
+#ifndef lnav_log_hh
+#define lnav_log_hh
+
+#include <string>
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+
+#ifndef lnav_dead2
+#    define lnav_dead2 __attribute__((noreturn))
+#endif
+
+#include "optional.hpp"
+
+struct termios;
+
+enum class lnav_log_level_t : uint32_t {
+    TRACE,
+    DEBUG,
+    INFO,
+    WARNING,
+    ERROR,
+};
+
+void log_argv(int argc, char* argv[]);
+void log_host_info();
+void log_rusage_raw(enum lnav_log_level_t level,
+                    const char* src_file,
+                    int line_number,
+                    const struct rusage& ru);
+void log_msg(enum lnav_log_level_t level,
+             const char* src_file,
+             int line_number,
+             const char* fmt,
+             ...);
+void log_msg_extra(const char* fmt, ...);
+void log_msg_extra_complete();
+void log_install_handlers();
+void log_abort() lnav_dead2;
+void log_pipe_err(int fd);
+void log_set_thread_prefix(std::string prefix);
+
+struct log_state_dumper {
+public:
+    log_state_dumper();
+
+    virtual ~log_state_dumper();
+
+    virtual void log_state(){
+
+    };
+
+    log_state_dumper(const log_state_dumper&) = delete;
+    log_state_dumper& operator=(const log_state_dumper&) = delete;
+};
+
+struct log_crash_recoverer {
+public:
+    log_crash_recoverer();
+
+    virtual ~log_crash_recoverer();
+
+    virtual void log_crash_recover() = 0;
+};
+
+extern nonstd::optional<FILE*> lnav_log_file;
+extern const char* lnav_log_crash_dir;
+extern nonstd::optional<const struct termios*> lnav_log_orig_termios;
+extern enum lnav_log_level_t lnav_log_level;
+
+#define log_msg_wrapper(level, fmt...) \
+    do { \
+        if (lnav_log_level <= level) { \
+            log_msg(level, __FILE__, __LINE__, fmt); \
+        } \
+    } while (false)
+
+#define log_rusage(level, ru) log_rusage_raw(level, __FILE__, __LINE__, ru);
+
+#define log_error(fmt...) log_msg_wrapper(lnav_log_level_t::ERROR, fmt);
+
+#define log_warning(fmt...) log_msg_wrapper(lnav_log_level_t::WARNING, fmt);
+
+#define log_info(fmt...) log_msg_wrapper(lnav_log_level_t::INFO, fmt);
+
+#define log_debug(fmt...) log_msg_wrapper(lnav_log_level_t::DEBUG, fmt);
+
+#define log_trace(fmt...) log_msg_wrapper(lnav_log_level_t::TRACE, fmt);
+
+#define require(e) ((void) ((e) ? 0 : lnav_require(#e, __FILE__, __LINE__)))
+#define lnav_require(e, file, line) \
+    (log_msg( \
+         lnav_log_level_t::ERROR, file, line, "failed precondition `%s'", e), \
+     log_abort(), \
+     1)
+
+#define ensure(e) ((void) ((e) ? 0 : lnav_ensure(#e, __FILE__, __LINE__)))
+#define lnav_ensure(e, file, line) \
+    (log_msg( \
+         lnav_log_level_t::ERROR, file, line, "failed postcondition `%s'", e), \
+     log_abort(), \
+     1)
+
+#define log_perror(e) \
+    ((void) ((e != -1) ? 0 : lnav_log_perror(#e, __FILE__, __LINE__)))
+#define lnav_log_perror(e, file, line) \
+    (log_msg(lnav_log_level_t::ERROR, \
+             file, \
+             line, \
+             "syscall failed `%s' -- %s", \
+             e, \
+             strerror(errno)), \
+     1)
+
+#endif