Converting differences between VS 2010 and 2015

Hi I have this code that was written in VS2010:

unsigned long CHwFingerprint::toHash(wstring& wmisignature)

{

    if (wmisignature.empty())

        wmisignature = _empty;



    hash<wstring> str_hash;

    unsigned long hash = (unsigned long)str_hash(wmisignature);

    return hash;

}

*wstring is just a Unicode string that we created and can be used as CString...

Now I get different results when I use this code in VS 2015.
For example if wmisignature=HMT351U6CFR8C-PB
Then the results will be as follow:

VS 2010: hash= 229184272

VS 2015: hash= 4005003184

Any ideas why?

edited Jan 1 at 11:40

Joey Mallone

2,23841833

asked Jan 1 at 9:06

Lee Shadmi

add a comment |

Hi I have this code that was written in VS2010:

unsigned long CHwFingerprint::toHash(wstring& wmisignature)

{

    if (wmisignature.empty())

        wmisignature = _empty;



    hash<wstring> str_hash;

    unsigned long hash = (unsigned long)str_hash(wmisignature);

    return hash;

}

*wstring is just a Unicode string that we created and can be used as CString...

Now I get different results when I use this code in VS 2015.
For example if wmisignature=HMT351U6CFR8C-PB
Then the results will be as follow:

VS 2010: hash= 229184272

VS 2015: hash= 4005003184

Any ideas why?

edited Jan 1 at 11:40

Joey Mallone

2,23841833

asked Jan 1 at 9:06

Lee Shadmi

add a comment |

Hi I have this code that was written in VS2010:

unsigned long CHwFingerprint::toHash(wstring& wmisignature)

{

    if (wmisignature.empty())

        wmisignature = _empty;



    hash<wstring> str_hash;

    unsigned long hash = (unsigned long)str_hash(wmisignature);

    return hash;

}

*wstring is just a Unicode string that we created and can be used as CString...

Now I get different results when I use this code in VS 2015.
For example if wmisignature=HMT351U6CFR8C-PB
Then the results will be as follow:

VS 2010: hash= 229184272

VS 2015: hash= 4005003184

Any ideas why?

edited Jan 1 at 11:40

Joey Mallone

2,23841833

asked Jan 1 at 9:06

Lee Shadmi

Hi I have this code that was written in VS2010:

unsigned long CHwFingerprint::toHash(wstring& wmisignature)

{

    if (wmisignature.empty())

        wmisignature = _empty;



    hash<wstring> str_hash;

    unsigned long hash = (unsigned long)str_hash(wmisignature);

    return hash;

}

*wstring is just a Unicode string that we created and can be used as CString...

Now I get different results when I use this code in VS 2015.
For example if wmisignature=HMT351U6CFR8C-PB
Then the results will be as follow:

VS 2010: hash= 229184272

VS 2015: hash= 4005003184

Any ideas why?

c++ visual-studio-2010 visual-studio-2015 type-conversion

edited Jan 1 at 11:40

Joey Mallone

2,23841833

asked Jan 1 at 9:06

Lee Shadmi

edited Jan 1 at 11:40

Joey Mallone

2,23841833

asked Jan 1 at 9:06

Lee Shadmi

edited Jan 1 at 11:40

Joey Mallone

2,23841833

edited Jan 1 at 11:40

Joey Mallone

2,23841833

edited Jan 1 at 11:40

Joey Mallone

2,23841833

asked Jan 1 at 9:06

Lee Shadmi

asked Jan 1 at 9:06

Lee Shadmi

asked Jan 1 at 9:06

Lee Shadmi

add a comment |

2 Answers
2

active

oldest

votes

The actual hash functions are implementation-dependent, so may differ from compilers...

and since C++14:

Hash functions are only required to produce the same result for the same input within a single execution of a program; this allows salted hashes that prevent collision denial-of-service attacks.

answered Jan 1 at 9:17

Jarod42

118k12103189

add a comment |

Right click the project and select properties.
Under configuration->General->Platform Tool Set, change to v100.

answered Jan 1 at 12:16

Moti Hamo

8413

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

The actual hash functions are implementation-dependent, so may differ from compilers...

and since C++14:

Hash functions are only required to produce the same result for the same input within a single execution of a program; this allows salted hashes that prevent collision denial-of-service attacks.

answered Jan 1 at 9:17

Jarod42

118k12103189

add a comment |

The actual hash functions are implementation-dependent, so may differ from compilers...

and since C++14:

Hash functions are only required to produce the same result for the same input within a single execution of a program; this allows salted hashes that prevent collision denial-of-service attacks.

answered Jan 1 at 9:17

Jarod42

118k12103189

add a comment |

The actual hash functions are implementation-dependent, so may differ from compilers...

and since C++14:

Hash functions are only required to produce the same result for the same input within a single execution of a program; this allows salted hashes that prevent collision denial-of-service attacks.

answered Jan 1 at 9:17

Jarod42

118k12103189

The actual hash functions are implementation-dependent, so may differ from compilers...

and since C++14:

Hash functions are only required to produce the same result for the same input within a single execution of a program; this allows salted hashes that prevent collision denial-of-service attacks.

answered Jan 1 at 9:17

Jarod42

118k12103189

answered Jan 1 at 9:17

Jarod42

118k12103189

answered Jan 1 at 9:17

Jarod42

118k12103189

answered Jan 1 at 9:17

Jarod42

118k12103189

add a comment |

Right click the project and select properties.
Under configuration->General->Platform Tool Set, change to v100.

answered Jan 1 at 12:16

Moti Hamo

8413

add a comment |

Right click the project and select properties.
Under configuration->General->Platform Tool Set, change to v100.

answered Jan 1 at 12:16

Moti Hamo

8413

add a comment |

Right click the project and select properties.
Under configuration->General->Platform Tool Set, change to v100.

answered Jan 1 at 12:16

Moti Hamo

8413

Right click the project and select properties.
Under configuration->General->Platform Tool Set, change to v100.

answered Jan 1 at 12:16

Moti Hamo

8413

answered Jan 1 at 12:16

Moti Hamo

8413

answered Jan 1 at 12:16

Moti Hamo

8413

answered Jan 1 at 12:16

Moti Hamo

8413

add a comment |

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