From d0e3528c8e07124964f873a733ab9b37f3ed0a0a Mon Sep 17 00:00:00 2001
From: Armin Novak <armin.novak@thincast.com>
Date: Wed, 9 Dec 2015 18:27:37 +0100
Subject: [PATCH] Added winpr_strerror function.

---
 winpr/include/winpr/debug.h  |  1 +
 winpr/libwinpr/utils/debug.c | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/winpr/include/winpr/debug.h b/winpr/include/winpr/debug.h
index 3d2cde6..362bafd 100644
--- a/winpr/include/winpr/debug.h
+++ b/winpr/include/winpr/debug.h
@@ -32,6 +32,7 @@ WINPR_API void* winpr_backtrace(DWORD size);
 WINPR_API void winpr_backtrace_free(void* buffer);
 WINPR_API char** winpr_backtrace_symbols(void* buffer, size_t* used);
 WINPR_API void winpr_backtrace_symbols_fd(void* buffer, int fd);
+WINPR_API char* winpr_strerror(DWORD dw, char* dmsg, size_t size);
 
 #ifdef __cplusplus
 }
diff --git a/winpr/libwinpr/utils/debug.c b/winpr/libwinpr/utils/debug.c
index d90d1e0..0b3150e 100644
--- a/winpr/libwinpr/utils/debug.c
+++ b/winpr/libwinpr/utils/debug.c
@@ -471,3 +471,29 @@ void winpr_log_backtrace(const char* tag, DWORD level, DWORD size)
 	winpr_backtrace_free(stack);
 }
 
+char* winpr_strerror(DWORD dw, char* dmsg, size_t size) {
+	LPTSTR msg = NULL;
+	DWORD rc;
+
+#if defined(_WIN32)
+	rc = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+			FORMAT_MESSAGE_FROM_SYSTEM |
+			FORMAT_MESSAGE_IGNORE_INSERTS,
+			NULL, dw, 0, (LPTSTR)&msg, 0, NULL);
+	if (rc) {
+#if defined(UNICODE)
+		WideCharToMultiByte(CP_ACP, 0, msg, rc, dmsg, size - 1, NULL, NULL);
+#else
+		memcpy(dmsg, msg, min(rc, size - 1));
+#endif
+		dmsg[min(rc, size - 1)] = 0;
+		LocalFree(msg);
+	} else {
+		_snprintf(dmsg, size, "FAILURE: %08X", GetLastError());
+	}
+#else
+	_snprintf(dmsg, size, "%s", strerror(dw));
+#endif
+
+	return dmsg;
+}
-- 
2.7.4