diff options
Diffstat (limited to 'lib/Support/Errno.cpp')
| -rw-r--r-- | lib/Support/Errno.cpp | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/lib/Support/Errno.cpp b/lib/Support/Errno.cpp index ed17f60..1eefa3e 100644 --- a/lib/Support/Errno.cpp +++ b/lib/Support/Errno.cpp @@ -39,28 +39,27 @@ std::string StrError(int errnum) { char buffer[MaxErrStrLen]; buffer[0] = '\0'; std::string str; + if (errnum == 0) + return str; + #ifdef HAVE_STRERROR_R // strerror_r is thread-safe. - if (errnum) -# if defined(__GLIBC__) && defined(_GNU_SOURCE) - // glibc defines its own incompatible version of strerror_r - // which may not use the buffer supplied. - str = strerror_r(errnum,buffer,MaxErrStrLen-1); -# else - strerror_r(errnum,buffer,MaxErrStrLen-1); - str = buffer; -# endif +#if defined(__GLIBC__) && defined(_GNU_SOURCE) + // glibc defines its own incompatible version of strerror_r + // which may not use the buffer supplied. + str = strerror_r(errnum, buffer, MaxErrStrLen - 1); +#else + strerror_r(errnum, buffer, MaxErrStrLen - 1); + str = buffer; +#endif #elif HAVE_DECL_STRERROR_S // "Windows Secure API" - if (errnum) { - strerror_s(buffer, MaxErrStrLen - 1, errnum); - str = buffer; - } + strerror_s(buffer, MaxErrStrLen - 1, errnum); + str = buffer; #elif defined(HAVE_STRERROR) // Copy the thread un-safe result of strerror into // the buffer as fast as possible to minimize impact // of collision of strerror in multiple threads. - if (errnum) - str = strerror(errnum); + str = strerror(errnum); #else // Strange that this system doesn't even have strerror // but, oh well, just use a generic message |