intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 96 insertions, 0 deletions

diff --git a/util/system/error.cpp b/util/system/error.cpp
new file mode 100644
index 00000000000..f778ec42cbe
--- /dev/null
+++ b/util/system/error.cpp
@@ -0,0 +1,96 @@
+#include "tls.h"
+#include "error.h"
+
+#include <util/string/strip.h>
+#include <util/generic/strfcpy.h>
+
+#include <cerrno>
+#include <cstdio>
+#include <cstring>
+
+#if defined(_win_)
+    #include <util/network/socket.h>
+    #include <util/generic/singleton.h>
+    #include "winint.h"
+#elif defined(_unix_)
+    #include <unistd.h>
+#endif
+
+void ClearLastSystemError() {
+#if defined(_win_)
+    SetLastError(0);
+#else
+    errno = 0;
+#endif
+}
+
+int LastSystemError() {
+#if defined(_win_)
+    int ret = GetLastError();
+
+    if (ret)
+        return ret;
+
+    ret = WSAGetLastError();
+
+    if (ret)
+        return ret;
+    // when descriptors number are over maximum, errno set in this variable
+    ret = *(_errno());
+    return ret;
+
+#else
+    return errno;
+#endif
+}
+
+#if defined(_win_)
+namespace {
+    struct TErrString {
+        inline TErrString() noexcept {
+            data[0] = 0;
+        }
+
+        char data[1024];
+    };
+}
+#endif
+
+const char* LastSystemErrorText(int code) {
+#if defined(_win_)
+    TErrString& text(*Singleton<TErrString>());
+    LastSystemErrorText(text.data, sizeof(text.data), code);
+
+    return text.data;
+#else
+    return strerror(code);
+#endif
+}
+
+#ifdef _win_
+static char* Strip(char* s) {
+    size_t len = strlen(s);
+    const char* ptr = s;
+    Strip(ptr, len);
+    if (ptr != s)
+        memmove(s, ptr, len);
+    s[len] = 0;
+    return s;
+}
+#endif // _win_
+
+void LastSystemErrorText(char* str, size_t size, int code) {
+#if defined(_win_)
+    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, code, 0, str, DWORD(size), 0);
+    Strip(str);
+#elif defined(_sun_)
+    strfcpy(str, strerror(code), size);
+#elif defined(_freebsd_) || defined(_darwin_) || defined(_musl_) || defined(_bionic_)
+    strerror_r(code, str, size);
+#elif defined(_linux_) | defined(_cygwin_)
+    char* msg = strerror_r(code, str, size);
+    strncpy(str, msg, size);
+#else
+    #error port me gently!
+#endif
+}