Cstring C++ find and replace

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Hello,

I have a C++ project (Microsoft Visual C++ 2008) that was developed years ago by a colleague of mine and I need to update something.

I have a CString that contains a json and I need to find and replace every combination of 4 consecutive numbers that is present with ****.

Example string

1234567 12 34 78 iioi78ccc8888 aaassd dededeed ed

Resulting string

****567 12 34 78 iioi78ccc**** aaassd dededeed ed

Can you suggest a function that can effectively do this, that is fully compatible with Microsoft Visual C++ 2008.

Thank you.

What I have tried:

My approach would be to use RegEX to find the list of 4 consecutive digits and to replace them but support for Microsoft Visual C++ 2008 is limited – as I was reading.

Posted 9-May-18 1:33am

micutzu

Updated 9-May-18 1:44am

Richard MacCutchan

v2

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Richard MacCutchan 9-May-18 7:33am

"support for Microsoft Visual C++ 2008 is limited"
In what way limited?

micutzu 9-May-18 7:44am

<regex>
Visual Studio 2010

2 solutions

Solution 1

See Standard C++ Library <regex>[^]

Posted 9-May-18 1:38am

Richard MacCutchan

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micutzu 9-May-18 7:44am

<regex>
Visual Studio 2010

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CPallini · Accepted Answer · 2018-05-09T01:46:00

Solution 2

You might as well write a simple function for doing that (just one pass on the buffer with a minimal state machine).

Posted 9-May-18 1:46am

CPallini

Comments

micutzu 9-May-18 7:48am

Right - but how to find (without regex) a combination of 4 consecutive numbers - like 8989 using Cstring functions - since Visual Studio 2008 is "jsut" 10 years old :)

CPallini 9-May-18 7:54am

looping over the buffer while taking note of 'last digit index'.