| //===-- Windows.cpp -------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // This file provides Windows support functions |
| |
| #include "lldb/Host/PosixApi.h" |
| #include "lldb/Host/windows/windows.h" |
| |
| #include "llvm/Support/ConvertUTF.h" |
| |
| #include <cassert> |
| #include <cctype> |
| #include <cerrno> |
| #include <cstdarg> |
| #include <cstdio> |
| #include <cstdlib> |
| #include <cstring> |
| #include <io.h> |
| |
| int vasprintf(char **ret, const char *fmt, va_list ap) { |
| char *buf; |
| int len; |
| size_t buflen; |
| va_list ap2; |
| |
| va_copy(ap2, ap); |
| len = vsnprintf(NULL, 0, fmt, ap2); |
| |
| if (len >= 0 && |
| (buf = (char *)malloc((buflen = (size_t)(len + 1)))) != NULL) { |
| len = vsnprintf(buf, buflen, fmt, ap); |
| *ret = buf; |
| } else { |
| *ret = NULL; |
| len = -1; |
| } |
| |
| va_end(ap2); |
| return len; |
| } |
| |
| #ifdef _MSC_VER |
| |
| #if _MSC_VER < 1900 |
| namespace lldb_private { |
| int vsnprintf(char *buffer, size_t count, const char *format, va_list argptr) { |
| int old_errno = errno; |
| int r = ::vsnprintf(buffer, count, format, argptr); |
| int new_errno = errno; |
| buffer[count - 1] = '\0'; |
| if (r == -1 || r == count) { |
| FILE *nul = fopen("nul", "w"); |
| int bytes_written = ::vfprintf(nul, format, argptr); |
| fclose(nul); |
| if (bytes_written < count) |
| errno = new_errno; |
| else { |
| errno = old_errno; |
| r = bytes_written; |
| } |
| } |
| return r; |
| } |
| } // namespace lldb_private |
| #endif |
| |
| #endif // _MSC_VER |