X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/8f3853baea6191788da6befb437e92ba246c86a3..b105ca65292e4af6ca2093351fd2a61180054e14:/apt-pkg/contrib/error.cc

diff --git a/apt-pkg/contrib/error.cc b/apt-pkg/contrib/error.cc
index 7dad11689..c06ea8364 100644
--- a/apt-pkg/contrib/error.cc
+++ b/apt-pkg/contrib/error.cc
@@ -13,19 +13,23 @@
    ##################################################################### */
 									/*}}}*/
 // Include Files							/*{{{*/
+#include <config.h>
+
 #include <apt-pkg/error.h>
 
+#include <stdarg.h>
+#include <stddef.h>
+#include <list>
 #include <iostream>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-
 #include <string>
 #include <cstring>
+#include <algorithm>
 
-#include "config.h"
-   									/*}}}*/
+									/*}}}*/
 
 // Global Error Object							/*{{{*/
 /* If the implementation supports posix threads then the accessor function
@@ -58,124 +62,111 @@
 // 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::FatalE, Errno, WarningE, NoticeE and DebugE - Add to the list/*{{{*/
+#define GEMessage(NAME, TYPE) \
+bool GlobalError::NAME (const char *Function, const char *Description,...) { \
+	va_list args; \
+	size_t msgSize = 400; \
+	int const errsv = errno; \
+	bool retry; \
+	do { \
+		va_start(args,Description); \
+		retry = InsertErrno(TYPE, Function, Description, args, errsv, msgSize); \
+		va_end(args); \
+	} while (retry); \
+	return false; \
 }
+GEMessage(FatalE, FATAL)
+GEMessage(Errno, ERROR)
+GEMessage(WarningE, WARNING)
+GEMessage(NoticeE, NOTICE)
+GEMessage(DebugE, DEBUG)
+#undef GEMessage
 									/*}}}*/
 // GlobalError::InsertErrno - Get part of the errortype string from errno/*{{{*/
 bool GlobalError::InsertErrno(MsgType const &type, const char *Function,
 				const char *Description,...) {
 	va_list args;
-	va_start(args,Description);
-	return InsertErrno(type, Function, Description, args);
+	size_t msgSize = 400;
+	int const errsv = errno;
+	bool retry;
+	do {
+		va_start(args,Description);
+		retry = InsertErrno(type, Function, Description, args, errsv, msgSize);
+		va_end(args);
+	} while (retry);
+	return false;
 }
 									/*}}}*/
 // GlobalError::InsertErrno - formats an error message with the errno	/*{{{*/
 bool GlobalError::InsertErrno(MsgType type, const char* Function,
-			      const char* Description, va_list &args) {
-	int const errsv = errno;
-	char* S = (char*) malloc(400);
-	size_t const Ssize = snprintf(S, 400, "%s - %s (%i: %s)", Description,
-				      Function, errsv, strerror(errsv)) + 1;
-
-	if (Ssize > 400) {
+			      const char* Description, va_list &args,
+			      int const errsv, size_t &msgSize) {
+	char* S = (char*) malloc(msgSize);
+	int const n = snprintf(S, msgSize, "%s - %s (%i: %s)", Description,
+			       Function, errsv, strerror(errsv));
+	if (n > -1 && ((unsigned int) n) < msgSize);
+	else {
+		if (n > -1)
+			msgSize = n + 1;
+		else
+			msgSize *= 2;
 		free(S);
-		S = (char*) malloc(Ssize);
-		snprintf(S, Ssize, "%s - %s (%i: %s)", Description,
-			 Function, errsv, strerror(errsv));
+		return true;
 	}
 
-	bool const geins = Insert(type, S, args);
+	bool const geins = Insert(type, S, args, msgSize);
 	free(S);
 	return geins;
 }
 									/*}}}*/
-// 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::Fatal, Error, Warning, Notice and Debug - Add to the list/*{{{*/
+#define GEMessage(NAME, TYPE) \
+bool GlobalError::NAME (const char *Description,...) { \
+	va_list args; \
+	size_t msgSize = 400; \
+	bool retry; \
+	do { \
+		va_start(args,Description); \
+		retry = Insert(TYPE, Description, args, msgSize); \
+		va_end(args); \
+	} while (retry); \
+	return false; \
 }
+GEMessage(Fatal, FATAL)
+GEMessage(Error, ERROR)
+GEMessage(Warning, WARNING)
+GEMessage(Notice, NOTICE)
+GEMessage(Debug, DEBUG)
+#undef GEMessage
 									/*}}}*/
 // GlobalError::Insert - Add a errotype message to the list		/*{{{*/
 bool GlobalError::Insert(MsgType const &type, const char *Description,...)
 {
 	va_list args;
-	va_start(args,Description);
-	return Insert(type, Description, args);
+	size_t msgSize = 400;
+	bool retry;
+	do {
+		va_start(args,Description);
+		retry = Insert(type, Description, args, msgSize);
+		va_end(args);
+	} while (retry);
+	return false;
 }
 									/*}}}*/
 // GlobalError::Insert - Insert a new item at the end			/*{{{*/
 bool GlobalError::Insert(MsgType type, const char* Description,
-			 va_list &args) {
-	char* S = (char*) malloc(400);
-	size_t const Ssize = vsnprintf(S, 400, Description, args) + 1;
-
-	if (Ssize > 400) {
-		free(S);
-		S = (char*) malloc(Ssize);
-		vsnprintf(S, Ssize, Description, args);
+			 va_list &args, size_t &msgSize) {
+	char* S = (char*) malloc(msgSize);
+	int const n = vsnprintf(S, msgSize, Description, args);
+	if (n > -1 && ((unsigned int) n) < msgSize);
+	else {
+		if (n > -1)
+			msgSize = n + 1;
+		else
+			msgSize *= 2;
+ 		free(S);
+		return true;
 	}
 
 	Item const m(S, type);
@@ -206,7 +197,7 @@ bool GlobalError::PopMessage(std::string &Text) {
 
 	// check if another error message is pending
 	for (std::list<Item>::const_iterator m = Messages.begin();
-	     m != Messages.end(); m++)
+	     m != Messages.end(); ++m)
 		if (m->Type == ERROR || m->Type == FATAL)
 			return Ret;
 
@@ -220,12 +211,13 @@ void GlobalError::DumpErrors(std::ostream &out, MsgType const &threshold,
 	if (mergeStack == true)
 		for (std::list<MsgStack>::const_reverse_iterator s = Stacks.rbegin();
 		     s != Stacks.rend(); ++s)
-			Messages.insert(Messages.begin(), s->Messages.begin(), s->Messages.end());
+			std::copy(s->Messages.begin(), s->Messages.end(), std::front_inserter(Messages));
+
+	std::for_each(Messages.begin(), Messages.end(), [&threshold, &out](Item const &m) {
+		if (m.Type >= threshold)
+			out << m << std::endl;
+	});
 
-	for (std::list<Item>::const_iterator m = Messages.begin();
-	     m != Messages.end(); m++)
-		if (m->Type >= threshold)
-			out << (*m) << std::endl;
 	Discard();
 }
 									/*}}}*/
@@ -233,28 +225,24 @@ void GlobalError::DumpErrors(std::ostream &out, MsgType const &threshold,
 void GlobalError::Discard() {
 	Messages.clear();
 	PendingFlag = false;
-};
+}
 									/*}}}*/
 // GlobalError::empty - does our error list include anything?		/*{{{*/
-bool GlobalError::empty(MsgType const &trashhold) const {
+bool GlobalError::empty(MsgType const &threshold) 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;
+	return std::find_if(Messages.begin(), Messages.end(), [&threshold](Item const &m) {
+		return m.Type >= threshold;
+	}) == Messages.end();
 }
 									/*}}}*/
 // GlobalError::PushToStack						/*{{{*/
 void GlobalError::PushToStack() {
-	MsgStack pack(Messages, PendingFlag);
-	Stacks.push_back(pack);
+	Stacks.emplace_back(Messages, PendingFlag);
 	Discard();
 }
 									/*}}}*/
@@ -270,7 +258,7 @@ void GlobalError::RevertToStack() {
 // GlobalError::MergeWithStack						/*{{{*/
 void GlobalError::MergeWithStack() {
 	MsgStack pack = Stacks.back();
-	Messages.insert(Messages.begin(), pack.Messages.begin(), pack.Messages.end());
+	Messages.splice(Messages.begin(), pack.Messages);
 	PendingFlag = PendingFlag || pack.PendingFlag;
 	Stacks.pop_back();
 }