RISC-V Access and Number Conversion in C

Deliverables due Tue Sep 5th by 11:59pm in your Project01 GitHub repo

Project01 will be interactively graded on Wed Sep 6th

Dev Environment Requirments

1. You need to show you can use ssh without passwords to access the euryale Ubuntu RISC-V vm.
2. You need to show you can run and access a Ubuntu RISC-V vm running on your computer using ssh without passwords.
3. You need to show you can access GitHub using ssh keys for your repos inside the Ubuntu RISC-V vms.
4. You need to show you can run the autograder in the Ubuntu RISC-V vms
5. You need to show you can use a console-based editor like micro or vim (not nano).

Number Conversion Requirements

1. You will implement a base conversion tool called project01. It converts numbers expressed in bases 2, 10, and 16 into the other two bases. Examples:

    $ ./project01 10 -o 2
    0b1010
    $ ./project01 0xFF -o 10
    255
    $ ./project01 0b11011110101011011011111011101111 -o 16
    0xDEADBEEF
    $ ./project01 0b11111111111111111111111111111111 -o 10
    4294967295
    $ ./project01 0x0000000B -o 10
    11
    $ ./project01 0b123 -o 2
    Bad input
   

2. You must implement the base conversions yourself, without using C library printf(%d), printf("%x"), scanf(), or atoi()
3. You must provide a Makefile which builds an executable called project01

Given

We will review processing command line arguments in C

Pseudocode for uint32_t string_to_int(char *str)

init retval to 0
init placeval to 1 (anything to the 0 power is 1)
determine the base of the str by looking at first two chars
    `0b` means base is 2, `0x` means base is 16, otherwise base is 10
loop over str from the highest index down to 0
    calculate the integer corresponding to the character at that index	
    calculate the value of that place by multiplying the integer * placeval
    add the value to the retval
    update to placeval to placeval * base
return the return value

Pseudocode for void int_to_string(uint32_t value, char *str, int base)

init buffer to empty
while value != 0
    quot = value / base
    rem = value % base
    calculate the character value of rem
    append the character value to the buffer
    value = quot
copy buffer into str in reverse order

Rubric

50% Dev Env Setup 50% Points determined by project01 autograder tests.

Get autograder here: https://github.com/phpeterson-usf/autograder

Get tests repo here: https://github.com/USF-CS315-F23/tests