feat: added ripemd160.cpp

[ShreeHarish]

Description of Change

Implemented the RIPEMD160 hashing, per request #2795

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added tests and example, test must pass
• Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes: Implemented the RIPEMD160 hashing algorithm. Implemented using threads for parallel processing.

[ShreeHarish]

updated all changes that was posted in this PR

[ShreeHarish]

updated recently requested changes

[ShreeHarish]

Kindly ping me for any other clarifications

[ShreeHarish]

I have some warnings in functions with switch cases that the control may reach the end of a fucntion without returning anything. But all of them are internal functions and it can be proved that the control can never reach the end of the function without returning anything. How can we handle this?

can this be ignored or should I handle to not produce any warnings?

Example of the warning is provided below.

C-Plus-Plus\hashing\ripemd_160.cpp:66:5: warning: control reaches end of non-void function [-Wreturn-type]
66 | }
| ^

[realstealthninja]

I have some warnings in functions with switch cases that the control may reach the end of a fucntion without returning anything. But all of them are internal functions and it can be proved that the control can never reach the end of the function without returning anything. How can we handle this?

can this be ignored or should I handle to not produce any warnings?

Example of the warning is provided below.

C-Plus-Plus\hashing\ripemd_160.cpp:66:5: warning: control reaches end of non-void function [-Wreturn-type]
66 | }
| ^

If j > 5 your function wont return anything. Throw and error in a default case. Probably an invalid argument error also add a @note to the functions with the switch statement stating that j must be less than 5

[ShreeHarish]

resolved warnings

[ShreeHarish]

Kindly ping me for any other clarifications

[realstealthninja]

LGTM. Thanks for this pr!

[ShreeHarish]

@Panquesito7 can you review the code if its good to go?

[ShreeHarish]

/Users/runner/work/C-Plus-Plus/C-Plus-Plus/hashing/ripemd_160.cpp:354:50: error: must explicitly qualify name of member function when taking its address
[ 37%] Linking CXX executable quadratic_probing_hash_table
std::thread compute_for_block_thread(&compute_for_block, this, &A,
^~~~~~~~~~~~~~~~~~
RIPEMD160::

Got this error when running on mac environment.

I modified the code as

std::thread compute_for_block_thread(&RIPEMD160::compute_for_block, this, &A,

If there is still any issue, kindly ping me.

[realstealthninja]

@ShreeHarish