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130 lines
4.4 KiB
130 lines
4.4 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: examples/cpp/backends/example.cpp.backends.file/example.cpp.backends.file.cpp
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*
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* Purpose: C++ example program for Pantheios. Demonstrates:
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*
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* - use of pantheios_be_file_setFilePath()
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* - use of pantheios::logputs() in bail-out conditions
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*
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* Created: 29th November 2006
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* Updated: 7th December 2010
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*
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* www: http://www.pantheios.org/
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*
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* License: This source code is placed into the public domain 2006
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* by Synesis Software Pty Ltd. There are no restrictions
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* whatsoever to your use of the software.
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*
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* This software is provided "as is", and any warranties,
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* express or implied, of any kind and for any purpose, are
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* disclaimed.
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*
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* ////////////////////////////////////////////////////////////////////// */
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#define PANTHEIOS_NO_INCLUDE_OS_AND_3PTYLIB_STRING_ACCESS // Faster compilation
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/* Pantheios Header Files */
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#include <pantheios/pantheios.hpp> // Pantheios C++ main header
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#include <pantheios/inserters/args.hpp> // for pantheios::args
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#include <pantheios/backends/bec.file.h> // be.file header
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/* Standard C/C++ Header Files */
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#include <exception> // for std::exception
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#include <new> // for std::bad_alloc
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#include <string> // for std::string
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#include <stdlib.h> // for exit codes
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/* ////////////////////////////////////////////////////////////////////// */
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/* Define the stock front-end process identity, so that it links when using
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* fe.N, fe.simple, etc. */
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PANTHEIOS_EXTERN_C const PAN_CHAR_T PANTHEIOS_FE_PROCESS_IDENTITY[] = PANTHEIOS_LITERAL_STRING("example.cpp.backends.file");
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/* ////////////////////////////////////////////////////////////////////// */
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#define PSTR(x) PANTHEIOS_LITERAL_STRING(x)
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/* ////////////////////////////////////////////////////////////////////// */
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int main(int argc, char **argv)
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{
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// Use of be.file involves several steps:
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//
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// 1. Linking to the back-end, either explicitly or implicitly
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// 2. Setting the log file path for the given back-end(s)
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// 3. Making log statements
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// 4. Changing the log file path for the given back-end(s)
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// 5. Closing the log file for the given back-end(s)
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// In this case, linking is performed either by the build makefile or the
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// IDE project file, to the be.file back-end.
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//
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// In this case, only one back-end is specified, so the back-end
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// identifier PANTHEIOS_BEID_ALL (=== 0) is used.
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//
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// In this case, the log file path is set to 'log.single', and the file is
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// truncated with the flag and mask PANTHEIOS_BE_FILE_F_TRUNCATE.
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//
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// In this case, we explicitly close the log-file, then open it again,
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// just for illustrative purposes.
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try
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{
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#ifndef PANTHEIOS_USE_WIDE_STRINGS
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pantheios::log_DEBUG("main(", pantheios::args(argc, argv), ")");
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#else /* ? !PANTHEIOS_USE_WIDE_STRINGS */
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STLSOFT_SUPPRESS_UNUSED(argc); STLSOFT_SUPPRESS_UNUSED(argv);
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#endif /* !PANTHEIOS_USE_WIDE_STRINGS */
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pantheios::log_NOTICE(PSTR("stmt 1"));
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// Set the file name for the only back-end, truncating the file's
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// existing contents, if any.
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pantheios_be_file_setFilePath(PSTR("single.log"), PANTHEIOS_BE_FILE_F_TRUNCATE, PANTHEIOS_BE_FILE_F_TRUNCATE, PANTHEIOS_BEID_ALL);
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pantheios::log_NOTICE(PSTR("stmt 2"));
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// Close the file, by setting the path to NULL.
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pantheios_be_file_setFilePath(NULL, PANTHEIOS_BEID_ALL);
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pantheios::log_NOTICE(PSTR("stmt 3"));
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// (Re)set the file name for the only back-end, and change it to append
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// to the file's existing contents. Note that this must be done by
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// changing the truncate bit in the mask to 0.
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pantheios_be_file_setFilePath(PSTR("single.log"), PANTHEIOS_BE_FILE_F_TRUNCATE, 0, PANTHEIOS_BEID_ALL);
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pantheios::log_NOTICE(PSTR("stmt 4"));
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pantheios::log_DEBUG(PSTR("exiting main()"));
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return EXIT_SUCCESS;
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}
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catch(std::bad_alloc&)
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{
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pantheios::log(pantheios::alert, PSTR("out of memory"));
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}
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catch(std::exception& x)
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{
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pantheios::log_CRITICAL(PSTR("Exception: "), x);
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}
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catch(...)
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{
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pantheios::logputs(pantheios::emergency, PSTR("Unexpected unknown error"));
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}
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return EXIT_FAILURE;
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}
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/* ///////////////////////////// end of file //////////////////////////// */
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