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/** |
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* exception.h: Ermyth exceptions. |
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* |
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* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team |
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* Rights to this code are as documented in doc/pod/gplicense.pod. |
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* |
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* $Id: exception.h,v 1.6 2007-09-16 18:54:42 pippijn Exp $ |
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*/ |
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|
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#ifndef ERMYTH_EXCEPTION_H |
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#define ERMYTH_EXCEPTION_H |
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|
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#include <cstdarg> |
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#include <cstdio> |
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#include <algorithm> |
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#include <exception> |
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|
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#include <svsconfig.h> |
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|
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#define SRCINF ::impl::srcinf (__FILE__, __LINE__, CURFUNC) |
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|
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#define EBUFSIZE 1024 |
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|
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namespace impl |
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{ |
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struct srcinf |
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{ |
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srcinf (char const *filename, unsigned int linenumber, char const *function) |
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: m_info (info (filename, linenumber, function)) |
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{ |
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} |
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|
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unsigned int line() const throw() { return m_info.line; } |
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char const *file() const throw() { return m_info.file; } |
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char const *func() const throw() { return m_info.func; } |
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|
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srcinf &operator = (srcinf const &rhs) |
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{ |
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if (this != &rhs) |
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this->m_info = rhs.m_info; |
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return *this; |
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} |
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|
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srcinf (srcinf const &rhs) |
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{ |
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this->m_info = rhs.m_info; |
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} |
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|
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private: |
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struct info |
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{ |
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char const *file; |
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unsigned line; |
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char const *func; |
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|
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info () |
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: file (0), line (0), func (0) |
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{ |
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} |
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|
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info (char const *filename, unsigned linenumber, char const *function) |
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: file (filename ? filename : "<anonymous file>"), line (linenumber), func (function ? function : "<anonymous function> ()") |
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{ |
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} |
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}; |
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|
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info m_info; |
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}; |
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|
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struct exception : std::exception |
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{ |
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virtual const char *what() const throw () |
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{ |
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return m_what ? m_what : ""; |
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} |
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|
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protected: |
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void what (srcinf const &si, char const *fmt, va_list ap) throw () |
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{ |
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char buf[EBUFSIZE]; |
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char *bufptr = buf; |
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int l = snprintf (bufptr, EBUFSIZE - 1, "%s(#%d): %s: ", si.file (), si.line (), si.func ()); |
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vsnprintf (bufptr + l, EBUFSIZE - 1, fmt, ap); |
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what (buf); |
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} |
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|
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void what (char const *fmt, va_list ap) throw () |
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{ |
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char buf[EBUFSIZE]; |
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vsnprintf (buf, EBUFSIZE - 1, fmt, ap); |
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what (buf); |
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} |
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|
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void what (char const *w) throw () |
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{ |
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std::copy (w, w + EBUFSIZE, m_what); |
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} |
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|
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exception () |
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{ |
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} |
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|
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private: |
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char m_what[EBUFSIZE]; |
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}; |
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} // namespace impl |
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|
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#define ADD_EXCEPTION(name, base) \ |
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struct name ## _exception : base \ |
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{ \ |
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explicit name ## _exception () \ |
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{ \ |
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what (#name " exception thrown"); \ |
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} \ |
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\ |
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explicit name ## _exception (char const *fmt, ...) \ |
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{ \ |
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va_list ap; \ |
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va_start (ap, fmt); \ |
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what (fmt, ap); \ |
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va_end (ap); \ |
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} \ |
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\ |
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explicit name ## _exception (impl::srcinf const &si, char const *fmt, ...) \ |
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{ \ |
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va_list ap; \ |
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va_start (ap, fmt); \ |
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what (si, fmt, ap); \ |
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va_end (ap); \ |
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} \ |
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} |
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|
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ADD_EXCEPTION (nullpointer, impl::exception); |
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ADD_EXCEPTION (balloc, impl::exception); |
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ADD_EXCEPTION (module, impl::exception); |
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ADD_EXCEPTION (factory, impl::exception); |
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|
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#endif // ERMYTH_EXCEPTION_H |
