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Using a 2nd argument instead of va_copy().

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This seems to be the only reasonable C++03-only solution.
This commit is contained in:
madmaxoft 2014-01-15 18:28:51 +01:00
parent 3fd19df9fd
commit dd6c5779ec
7 changed files with 46 additions and 32 deletions
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6
lib/inifile/iniFile.cpp
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@ -446,10 +446,12 @@ bool cIniFile::SetValueF(const AString & a_KeyName, const AString & a_ValueName,
bool cIniFile::SetValueV(const AString & a_KeyName, const AString & a_ValueName, const char * a_Format, ...) bool cIniFile::SetValueV(const AString & a_KeyName, const AString & a_ValueName, const char * a_Format, ...)
{ {
va_list args; va_list args, argsCopy;
va_start(args, a_Format); va_start(args, a_Format);
va_start(argsCopy, a_Format);
AString Data; AString Data;
AppendVPrintf(Data, a_Format, args); AppendVPrintf(Data, a_Format, args, argsCopy);
va_end(argsCopy);
va_end(args); va_end(args);
return SetValue(a_KeyName, a_ValueName, Data); return SetValue(a_KeyName, a_ValueName, Data);
} }

6
src/CommandOutput.cpp
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@ -16,9 +16,11 @@
void cCommandOutputCallback::Out(const char * a_Fmt, ...) void cCommandOutputCallback::Out(const char * a_Fmt, ...)
{ {
AString Output; AString Output;
va_list args; va_list args, argsCopy;
va_start(args, a_Fmt); va_start(args, a_Fmt);
AppendVPrintf(Output, a_Fmt, args); va_start(argsCopy, a_Fmt);
AppendVPrintf(Output, a_Fmt, args, argsCopy);
va_end(argsCopy);
va_end(args); va_end(args);
Output.append("\n"); Output.append("\n");
Out(Output); Out(Output);

10
src/Log.cpp
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@ -99,10 +99,10 @@ void cLog::ClearLog()
void cLog::Log(const char * a_Format, va_list argList) void cLog::Log(const char * a_Format, va_list argList, va_list argListCopy)
{ {
AString Message; AString Message;
AppendVPrintf(Message, a_Format, argList); AppendVPrintf(Message, a_Format, argList, argListCopy);
time_t rawtime; time_t rawtime;
time ( &rawtime ); time ( &rawtime );
@ -149,9 +149,11 @@ void cLog::Log(const char * a_Format, va_list argList)
void cLog::Log(const char * a_Format, ...) void cLog::Log(const char * a_Format, ...)
{ {
va_list argList; va_list argList, argListCopy;
va_start(argList, a_Format); va_start(argList, a_Format);
Log( a_Format, argList ); va_start(argListCopy, a_Format);
Log(a_Format, argList, argListCopy);
va_end(argListCopy);
va_end(argList); va_end(argList);
} }

2
src/Log.h
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@ -14,7 +14,7 @@ private:
public: public:
cLog(const AString & a_FileName); cLog(const AString & a_FileName);
~cLog(); ~cLog();
void Log(const char* a_Format, va_list argList ); void Log(const char * a_Format, va_list argList, va_list argListCopy);
void Log(const char * a_Format, ...); void Log(const char * a_Format, ...);
// tolua_begin // tolua_begin
void SimpleLog(const char * a_String); void SimpleLog(const char * a_String);

6
src/OSSupport/File.cpp
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@ -440,9 +440,11 @@ AString cFile::ReadWholeFile(const AString & a_FileName)
int cFile::Printf(const char * a_Fmt, ...) int cFile::Printf(const char * a_Fmt, ...)
{ {
AString buf; AString buf;
va_list args; va_list args, argsCopy;
va_start(args, a_Fmt); va_start(args, a_Fmt);
AppendVPrintf(buf, a_Fmt, args); va_start(argsCopy, a_Fmt);
AppendVPrintf(buf, a_Fmt, args, argsCopy);
va_end(argsCopy);
va_end(args); va_end(args);
return Write(buf.c_str(), buf.length()); return Write(buf.c_str(), buf.length());
} }

28
src/StringUtils.cpp
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@ -18,7 +18,7 @@
AString & AppendVPrintf(AString & str, const char *format, va_list args) AString & AppendVPrintf(AString & str, const char *format, va_list args, va_list argsCopy)
{ {
ASSERT(format != NULL); ASSERT(format != NULL);
@ -28,10 +28,6 @@ AString & AppendVPrintf(AString & str, const char *format, va_list args)
// MS CRT provides secure printf that doesn't behave like in the C99 standard // MS CRT provides secure printf that doesn't behave like in the C99 standard
if ((len = _vsnprintf_s(buffer, ARRAYCOUNT(buffer), _TRUNCATE, format, args)) != -1) if ((len = _vsnprintf_s(buffer, ARRAYCOUNT(buffer), _TRUNCATE, format, args)) != -1)
#else // _MSC_VER #else // _MSC_VER
// We need to store a copy of the args, because on AMD64 in GCC the vsnprintf() is allowed to make changes to it (WTF?)
// Ref.: issue #541, http://www.bailopan.net/blog/?p=30
va_list args2;
va_copy(args2, args);
if ((len = vsnprintf(buffer, ARRAYCOUNT(buffer), format, args)) < ARRAYCOUNT(buffer)) if ((len = vsnprintf(buffer, ARRAYCOUNT(buffer), format, args)) < ARRAYCOUNT(buffer))
#endif // else _MSC_VER #endif // else _MSC_VER
{ {
@ -53,9 +49,9 @@ AString & AppendVPrintf(AString & str, const char *format, va_list args)
// Allocate a buffer and printf into it: // Allocate a buffer and printf into it:
std::vector<char> Buffer(len + 1); std::vector<char> Buffer(len + 1);
#ifdef _MSC_VER #ifdef _MSC_VER
vsprintf_s((char *)&(Buffer.front()), Buffer.size(), format, args); vsprintf_s((char *)&(Buffer.front()), Buffer.size(), format, argsCopy);
#else // _MSC_VER #else // _MSC_VER
vsnprintf((char *)&(Buffer.front()), Buffer.size(), format, args2); vsnprintf((char *)&(Buffer.front()), Buffer.size(), format, argsCopy);
#endif // else _MSC_VER #endif // else _MSC_VER
str.append(&(Buffer.front()), Buffer.size() - 1); str.append(&(Buffer.front()), Buffer.size() - 1);
return str; return str;
@ -68,9 +64,11 @@ AString & AppendVPrintf(AString & str, const char *format, va_list args)
AString & Printf(AString & str, const char * format, ...) AString & Printf(AString & str, const char * format, ...)
{ {
str.clear(); str.clear();
va_list args; va_list args, argsCopy;
va_start(args, format); va_start(args, format);
std::string &retval = AppendVPrintf(str, format, args); va_start(argsCopy, format);
std::string &retval = AppendVPrintf(str, format, args, argsCopy);
va_end(argsCopy);
va_end(args); va_end(args);
return retval; return retval;
} }
@ -82,9 +80,11 @@ AString & Printf(AString & str, const char * format, ...)
AString Printf(const char * format, ...) AString Printf(const char * format, ...)
{ {
AString res; AString res;
va_list args; va_list args, argsCopy;
va_start(args, format); va_start(args, format);
AppendVPrintf(res, format, args); va_start(argsCopy, format);
AppendVPrintf(res, format, args, argsCopy);
va_end(argsCopy);
va_end(args); va_end(args);
return res; return res;
} }
@ -95,9 +95,11 @@ AString Printf(const char * format, ...)
AString & AppendPrintf(AString &str, const char *format, ...) AString & AppendPrintf(AString &str, const char *format, ...)
{ {
va_list args; va_list args, argsCopy;
va_start(args, format); va_start(args, format);
std::string &retval = AppendVPrintf(str, format, args); va_start(argsCopy, format);
std::string &retval = AppendVPrintf(str, format, args, argsCopy);
va_end(argsCopy);
va_end(args); va_end(args);
return retval; return retval;
} }

8
src/StringUtils.h
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@ -21,8 +21,12 @@ typedef std::list<AString> AStringList;
/// Add the formated string to the existing data in the string /** Add the formated string to the existing data in the string
extern AString & AppendVPrintf(AString & str, const char * format, va_list args); It is silly to need to specify the arguments twice, but it is required for x64 / GCC:
Ref.: issue #541, http://www.bailopan.net/blog/?p=30
va_copy is not available until C++11, so we need to make do with passing a duplicate.
*/
extern AString & AppendVPrintf(AString & str, const char * format, va_list args, va_list argsCopy);
/// Output the formatted text into the string /// Output the formatted text into the string
extern AString & Printf (AString & str, const char * format, ...); extern AString & Printf (AString & str, const char * format, ...);