http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/wvstreams/wvlog.h

/* -*- Mode: C++ -*- * Worldvisions Weaver Software: * Copyright (C) 1997-2002 Net Integration Technologies, Inc. * * A generic data-logger class with support for multiple receivers. If * no WvLogRcv objects have been created (see wvlogrcv.h) the default is * to log to stderr. * * WvLog supports partial- and multiple-line log messages. For example, * log.print("test "); * log.print("string\nfoo"); * will print: * appname(lvl): test string * appname(lvl): foo */ #ifndef __WVLOG_H #define __WVLOG_H #include "wvstream.h" #include <errno.h> #ifdef _WIN32 typedef int pid_t; #endif class WvLog; // a WvLogRcv registers itself with WvLog and prints, captures, // or transmits log messages. class WvLogRcvBase { friend class WvLog; protected: const char *appname(WvStringParm log) const; virtual void log(WvStringParm source, int loglevel, const char *_buf, size_t len) = 0; private: static void cleanup_on_fork(pid_t p); static void static_init(); public: bool force_new_line; WvLogRcvBase(); virtual ~WvLogRcvBase(); }; DeclareWvList(WvLogRcvBase); /** * A WvLog stream accepts log messages from applications and forwards them * to all registered WvLogRcv's. */ class WvLog : public WvStream { friend class WvLogRcvBase; public: enum LogLevel { Critical = 0, Error, Warning, Notice, Info, Debug, Debug1=Debug, Debug2, Debug3, Debug4, Debug5, NUM_LOGLEVELS }; WvString app; protected: LogLevel loglevel; static WvLogRcvBaseList receivers; static int num_receivers, num_logs; static WvLogRcvBase *default_receiver; public: WvLog(WvStringParm _app, LogLevel _loglevel = Info); WvLog(const WvLog &l); virtual ~WvLog(); /** fd==-1, but this stream is always ok */ virtual bool isok() const; /* always writable */ virtual bool pre_select(SelectInfo &si); /** * change the loglevel. This returns the object again, so you can * make convenient statements like log.lvl(WvLog::Warning).print(...) */ WvLog &lvl(LogLevel _loglevel) { loglevel = _loglevel; return *this; } /** change the loglevel and then print a message. */ size_t operator() (LogLevel _loglevel, WvStringParm s) { LogLevel l = loglevel; size_t x = lvl(_loglevel).write(s); lvl(l); return x; } /** change the loglevel and then print a formatted message */ size_t operator() (LogLevel _loglevel, WVSTRING_FORMAT_DECL) { LogLevel l = loglevel; size_t x = lvl(_loglevel).print(WVSTRING_FORMAT_CALL); lvl(l); return x; } /** * although these appear in WvStream, they need to be re-listed here * since the above operator()s caused them to be hidden */ size_t operator() (WvStringParm s) { return WvStream::operator()(s); } size_t operator() (WVSTRING_FORMAT_DECL) { return WvStream::operator()(WVSTRING_FORMAT_CALL); } /** * split off a new WvLog object with the requested loglevel. This way * you can have log at two or more levels without having to retype * log.lvl(WvLog::blahblah) all the time. */ WvLog split(LogLevel _loglevel) const { return WvLog(app, _loglevel); } /** * we override the unbuffered write function, so lines also include the * application and log level. */ virtual size_t uwrite(const void *buf, size_t len); /** a useful substitute for the normal C perror() function */ void perror(WvStringParm s) { print("%s: %s\n", s, strerror(errno)); } }; #endif // __WVLOG_H