Initialize

err.cpp

@@ -0,0 +1,62 @@
+#if HAVE_UTILS_CONFIG_H
+#include "utils_config.h"
+#endif
+
+#include "err.h"
+#include "wchar_util.h"
+#include <string.h>
+#if _WIN32
+#include "Windows.h"
+#endif
+
+bool err::get_errno_message(std::string &out, int errnum) {
+#if _WIN32
+#if HAVE__WCSERROR_S
+    wchar_t buf[512];
+    if(!_wcserror_s(buf, errnum)) {
+        std::wstring ws(buf);
+        if(wchar_util::wstr_to_str(out, ws, CP_UTF8)) return true;
+    }
+#else
+    wchar_t* buf = _wcserror(errnum);
+    if (buf != nullptr) {
+        std::wstring ws(buf);
+        if(wchar_util::wstr_to_str(out, ws, CP_UTF8)) return true;
+    }
+#endif
+#if HAVE_STRERROR_S
+    char nbuf[1024];
+    if (!strerror_s(nbuf, errnum)) {
+        out = nbuf;
+        return true;
+    }
+#else
+    char* nbuf = strerror(errnum);
+    if (nbuf != nullptr) {
+        out = nbuf;
+        return true;
+    }
+#endif
+    return false;
+#else
+#if HAVE_GNU_STRERROR_R
+    char buf[1024];
+    char* re = strerror_r(errnum, buf, 1024);
+    out = re;
+    return true;
+#else
+#if HAVE_STRERROR_R
+    char buf[1024];
+    if (!strerror_r(errnum, buf, 1024)) {
+        out = buf;
+        return true;
+    }
+#endif
+    char *ret = strerror(errnum);
+    if (ret != nullptr) {
+        out = ret;
+    }
+    return ret != nullptr;
+#endif 
+#endif
+}