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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
Global Error Class - Global error mechanism
We use a simple STL vector to store each error record. A PendingFlag
is kept which indicates when the vector contains a Sever error.
This source is placed in the Public Domain, do with it what you will
It was originally written by Jason Gunthorpe.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/error.h>
#include <iostream>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <string>
#include <cstring>
#include "config.h"
/*}}}*/
// Global Error Object /*{{{*/
/* If the implementation supports posix threads then the accessor function
is compiled to be thread safe otherwise a non-safe version is used. A
Per-Thread error object is maintained in much the same manner as libc
manages errno */
#if defined(_POSIX_THREADS) && defined(HAVE_PTHREAD)
#include <pthread.h>
static pthread_key_t ErrorKey;
static void ErrorDestroy(void *Obj) {delete (GlobalError *)Obj;};
static void KeyAlloc() {pthread_key_create(&ErrorKey,ErrorDestroy);};
GlobalError *_GetErrorObj() {
static pthread_once_t Once = PTHREAD_ONCE_INIT;
pthread_once(&Once,KeyAlloc);
void *Res = pthread_getspecific(ErrorKey);
if (Res == 0)
pthread_setspecific(ErrorKey,Res = new GlobalError);
return (GlobalError *)Res;
}
#else
GlobalError *_GetErrorObj() {
static GlobalError *Obj = new GlobalError;
return Obj;
}
#endif
/*}}}*/
// GlobalError::GlobalError - Constructor /*{{{*/
GlobalError::GlobalError() : PendingFlag(false) {}
/*}}}*/
// GlobalError::FatalE - Get part of the error string from errno /*{{{*/
bool GlobalError::FatalE(const char *Function,const char *Description,...) {
va_list args;
va_start(args,Description);
return InsertErrno(FATAL, Function, Description, args);
}
/*}}}*/
// GlobalError::Errno - Get part of the error string from errno /*{{{*/
bool GlobalError::Errno(const char *Function,const char *Description,...) {
va_list args;
va_start(args,Description);
return InsertErrno(ERROR, Function, Description, args);
}
/*}}}*/
// GlobalError::WarningE - Get part of the warning string from errno /*{{{*/
bool GlobalError::WarningE(const char *Function,const char *Description,...) {
va_list args;
va_start(args,Description);
return InsertErrno(WARNING, Function, Description, args);
}
/*}}}*/
// GlobalError::NoticeE - Get part of the notice string from errno /*{{{*/
bool GlobalError::NoticeE(const char *Function,const char *Description,...) {
va_list args;
va_start(args,Description);
return InsertErrno(NOTICE, Function, Description, args);
}
/*}}}*/
// GlobalError::DebugE - Get part of the debug string from errno /*{{{*/
bool GlobalError::DebugE(const char *Function,const char *Description,...) {
va_list args;
va_start(args,Description);
return InsertErrno(DEBUG, Function, Description, args);
}
/*}}}*/
// GlobalError::InsertErrno - formats an error message with the errno /*{{{*/
bool GlobalError::InsertErrno(MsgType type, const char* Function,
const char* Description, va_list const &args) {
char S[400];
vsnprintf(S,sizeof(S),Description,args);
snprintf(S + strlen(S),sizeof(S) - strlen(S),
" - %s (%i: %s)", Function, errno, strerror(errno));
return Insert(type, S, args);
}
/*}}}*/
// GlobalError::Fatal - Add a fatal error to the list /*{{{*/
bool GlobalError::Fatal(const char *Description,...) {
va_list args;
va_start(args,Description);
return Insert(FATAL, Description, args);
}
/*}}}*/
// GlobalError::Error - Add an error to the list /*{{{*/
bool GlobalError::Error(const char *Description,...) {
va_list args;
va_start(args,Description);
return Insert(ERROR, Description, args);
}
/*}}}*/
// GlobalError::Warning - Add a warning to the list /*{{{*/
bool GlobalError::Warning(const char *Description,...) {
va_list args;
va_start(args,Description);
return Insert(WARNING, Description, args);
}
/*}}}*/
// GlobalError::Notice - Add a notice to the list /*{{{*/
bool GlobalError::Notice(const char *Description,...)
{
va_list args;
va_start(args,Description);
return Insert(NOTICE, Description, args);
}
/*}}}*/
// GlobalError::Debug - Add a debug to the list /*{{{*/
bool GlobalError::Debug(const char *Description,...)
{
va_list args;
va_start(args,Description);
return Insert(DEBUG, Description, args);
}
/*}}}*/
// GlobalError::Insert - Insert a new item at the end /*{{{*/
bool GlobalError::Insert(MsgType type, const char* Description,
va_list const &args) {
char S[400];
vsnprintf(S,sizeof(S),Description,args);
Item const m(S, type);
Messages.push_back(m);
if (type == ERROR || type == FATAL)
PendingFlag = true;
if (type == FATAL || type == DEBUG)
std::clog << m << std::endl;
return false;
}
/*}}}*/
// GlobalError::PopMessage - Pulls a single message out /*{{{*/
bool GlobalError::PopMessage(std::string &Text) {
if (Messages.empty() == true)
return false;
Item const msg = Messages.front();
Messages.pop_front();
bool const Ret = (msg.Type == ERROR || msg.Type == FATAL);
Text = msg.Text;
if (PendingFlag == false || Ret == false)
return Ret;
// check if another error message is pending
for (std::list<Item>::const_iterator m = Messages.begin();
m != Messages.end(); m++)
if (m->Type == ERROR || m->Type == FATAL)
return Ret;
PendingFlag = false;
return Ret;
}
/*}}}*/
// GlobalError::DumpErrors - Dump all of the errors/warns to cerr /*{{{*/
void GlobalError::DumpErrors(std::ostream &out, MsgType const &trashhold) {
for (std::list<Item>::const_iterator m = Messages.begin();
m != Messages.end(); m++)
if (m->Type >= trashhold)
out << (*m) << std::endl;
Discard();
}
/*}}}*/
// GlobalError::Discard - Discard /*{{{*/
void GlobalError::Discard() {
Messages.clear();
PendingFlag = false;
};
/*}}}*/
// GlobalError::empty - does our error list include anything? /*{{{*/
bool GlobalError::empty(MsgType const &trashhold) const {
if (PendingFlag == true)
return false;
if (Messages.empty() == true)
return true;
for (std::list<Item>::const_iterator m = Messages.begin();
m != Messages.end(); m++)
if (m->Type >= trashhold)
return false;
return true;
}
/*}}}*/
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