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-rw-r--r--src/common/misc.cpp44
1 files changed, 29 insertions, 15 deletions
diff --git a/src/common/misc.cpp b/src/common/misc.cpp
index 1d5393597..495385b9e 100644
--- a/src/common/misc.cpp
+++ b/src/common/misc.cpp
@@ -12,27 +12,41 @@
#include "common/common_funcs.h"
-// Generic function to get last error message.
-// Call directly after the command or use the error num.
-// This function might change the error code.
-std::string GetLastErrorMsg() {
- static constexpr std::size_t buff_size = 255;
- char err_str[buff_size];
-
+std::string NativeErrorToString(int e) {
#ifdef _WIN32
- FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, nullptr, GetLastError(),
- MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), err_str, buff_size, nullptr);
- return std::string(err_str, buff_size);
-#elif defined(__GLIBC__) && (_GNU_SOURCE || (_POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600))
+ LPSTR err_str;
+
+ DWORD res = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER |
+ FORMAT_MESSAGE_IGNORE_INSERTS,
+ nullptr, e, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ reinterpret_cast<LPSTR>(&err_str), 1, nullptr);
+ if (!res) {
+ return "(FormatMessageA failed to format error)";
+ }
+ std::string ret(err_str);
+ LocalFree(err_str);
+ return ret;
+#else
+ char err_str[255];
+#if defined(__GLIBC__) && (_GNU_SOURCE || (_POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600))
// Thread safe (GNU-specific)
- const char* str = strerror_r(errno, err_str, buff_size);
+ const char* str = strerror_r(e, err_str, sizeof(err_str));
return std::string(str);
#else
// Thread safe (XSI-compliant)
- const int success = strerror_r(errno, err_str, buff_size);
- if (success != 0) {
- return {};
+ int second_err = strerror_r(e, err_str, sizeof(err_str));
+ if (second_err != 0) {
+ return "(strerror_r failed to format error)";
}
return std::string(err_str);
+#endif // GLIBC etc.
+#endif // _WIN32
+}
+
+std::string GetLastErrorMsg() {
+#ifdef _WIN32
+ return NativeErrorToString(GetLastError());
+#else
+ return NativeErrorToString(errno);
#endif
}