/*

#define DEFINE_UNICODE    FALSE

#define CUR_PATH_SEPARATOR_CHR  '\\'

#define CUR_PATH_SEPARATOR_STR  "\\"

#define PATH_ALLOC_COMBINE  PathAllocCombineA

*/

/**

 * FIXME: These implementations of the PathAllocCombine functions have

 * several issues:

 * - pszPathIn or pszMore may be NULL (but not both)

 * - no check if pszMore is fully qualified (if so, it must be directly

 *   copied to the output buffer without being combined with pszPathIn.

 * - if pszMore begins with a _single_ backslash it must be combined with

 *   only the root of the path pointed to by pszPathIn and there's no code

 *   to extract the root of pszPathIn.

 * - the function will crash with some short string lengths of the parameters

 */

#include <stdlib.h>

#include <string.h>

#include <winpr/wtypes.h>

#include <winpr/string.h>

#include <winpr/error.h>

#include <winpr/wlog.h>

#if DEFINE_UNICODE

HRESULT PATH_ALLOC_COMBINE(PCWSTR pszPathIn, PCWSTR pszMore,

                           WINPR_ATTR_UNUSED unsigned long dwFlags, PWSTR* ppszPathOut)

{

  WLog_WARN("TODO", "has known bugs and needs fixing.");

  if (!ppszPathOut)

    return E_INVALIDARG;

  if (!pszPathIn && !pszMore)

    return E_INVALIDARG;

  if (!pszMore)

    return E_FAIL; /* valid but not implemented, see top comment */

  if (!pszPathIn)

    return E_FAIL; /* valid but not implemented, see top comment */

  const size_t pszPathInLength = _wcslen(pszPathIn);

  const size_t pszMoreLength = _wcslen(pszMore);

  /* prevent segfaults - the complete implementation below is buggy */

  if (pszPathInLength < 3)

    return E_FAIL;

  const BOOL backslashIn =

      (pszPathIn[pszPathInLength - 1] == CUR_PATH_SEPARATOR_CHR) ? TRUE : FALSE;

  const BOOL backslashMore = (pszMore[0] == CUR_PATH_SEPARATOR_CHR) ? TRUE : FALSE;

  if (backslashMore)

  {

    if ((pszPathIn[1] == ':') && (pszPathIn[2] == CUR_PATH_SEPARATOR_CHR))

    {

      const WCHAR colon[] = { ':', '\0' };

      const size_t pszPathOutLength = sizeof(WCHAR) + pszMoreLength;

      const size_t sizeOfBuffer = (pszPathOutLength + 1) * sizeof(WCHAR);

      PWSTR pszPathOut = (PWSTR)calloc(sizeOfBuffer, sizeof(WCHAR));

      if (!pszPathOut)

        return E_OUTOFMEMORY;

      _wcsncat(pszPathOut, &pszPathIn[0], 1);

      _wcsncat(pszPathOut, colon, ARRAYSIZE(colon));

      _wcsncat(pszPathOut, pszMore, pszMoreLength);

      *ppszPathOut = pszPathOut;

      return S_OK;

    }

  }

  else

  {

    const size_t pszPathOutLength = pszPathInLength + pszMoreLength;

    const size_t sizeOfBuffer = (pszPathOutLength + 1) * 2;

    PWSTR pszPathOut = (PWSTR)calloc(sizeOfBuffer, 2);

    if (!pszPathOut)

      return E_OUTOFMEMORY;

    _wcsncat(pszPathOut, pszPathIn, pszPathInLength);

    if (!backslashIn)

      _wcsncat(pszPathOut, CUR_PATH_SEPARATOR_STR, ARRAYSIZE(CUR_PATH_SEPARATOR_STR));

    _wcsncat(pszPathOut, pszMore, pszMoreLength);

    *ppszPathOut = pszPathOut;

    return S_OK;

  }

  return E_FAIL;

}

Unexecuted instantiation: PathAllocCombineW

Unexecuted instantiation: UnixPathAllocCombineW

Unexecuted instantiation: NativePathAllocCombineW

#else

HRESULT PATH_ALLOC_COMBINE(PCSTR pszPathIn, PCSTR pszMore, WINPR_ATTR_UNUSED unsigned long dwFlags,

                           PSTR* ppszPathOut)

{

  WLog_WARN("TODO", "has known bugs and needs fixing.");

  if (!ppszPathOut)

    return E_INVALIDARG;

  if (!pszPathIn && !pszMore)

    return E_INVALIDARG;

  if (!pszMore)

    return E_FAIL; /* valid but not implemented, see top comment */

  if (!pszPathIn)

    return E_FAIL; /* valid but not implemented, see top comment */

  const size_t pszPathInLength = strlen(pszPathIn);

  const size_t pszMoreLength = strlen(pszMore);

  /* prevent segfaults - the complete implementation below is buggy */

  if (pszPathInLength < 3)

    return E_FAIL;

  const BOOL backslashIn =

      (pszPathIn[pszPathInLength - 1] == CUR_PATH_SEPARATOR_CHR) ? TRUE : FALSE;

  const BOOL backslashMore = (pszMore[0] == CUR_PATH_SEPARATOR_CHR) ? TRUE : FALSE;

  if (backslashMore)

  {

    if ((pszPathIn[1] == ':') && (pszPathIn[2] == CUR_PATH_SEPARATOR_CHR))

    {

      const size_t pszPathOutLength = 2 + pszMoreLength;

      const size_t sizeOfBuffer = (pszPathOutLength + 1) * 2;

      PSTR pszPathOut = calloc(sizeOfBuffer, 2);

      if (!pszPathOut)

        return E_OUTOFMEMORY;

      (void)sprintf_s(pszPathOut, sizeOfBuffer, "%c:%s", pszPathIn[0], pszMore);

      *ppszPathOut = pszPathOut;

      return S_OK;

    }

  }

  else

  {

    const size_t pszPathOutLength = pszPathInLength + pszMoreLength;

    const size_t sizeOfBuffer = (pszPathOutLength + 1) * 2;

    PSTR pszPathOut = calloc(sizeOfBuffer, 2);

    if (!pszPathOut)

      return E_OUTOFMEMORY;

    if (backslashIn)

      (void)sprintf_s(pszPathOut, sizeOfBuffer, "%s%s", pszPathIn, pszMore);

    else

      (void)sprintf_s(pszPathOut, sizeOfBuffer, "%s%s%s", pszPathIn, CUR_PATH_SEPARATOR_STR,

                      pszMore);

    *ppszPathOut = pszPathOut;

    return S_OK;

  }

  return E_FAIL;

}

Unexecuted instantiation: PathAllocCombineA

Unexecuted instantiation: UnixPathAllocCombineA

Unexecuted instantiation: NativePathAllocCombineA

#endif

/*

#undef DEFINE_UNICODE

#undef CUR_PATH_SEPARATOR_CHR

#undef CUR_PATH_SEPARATOR_STR

#undef PATH_ALLOC_COMBINE

*/