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0x14-bit_manipulation

README.md

C - Bit manipulation

In this project, I learned how to manipulate bits and use the bitwise operators >>, <<, &, |, and ^ in C.

Tests ✔️

  • tests: Folder of test files. Provided by Holberton School.

Helper File 🙌

  • _putchar.c: C function that writes a character to stdout.

Header File 📁

  • main.h: Header file containing prototypes for all functions written in the project.
File Prototype
0-binary_to_uint.c unsigned int binary_to_uint(const char *b);
1-print_binary.c void print_binary(unsigned long int n);
2-get_bit.c int get_bit(unsigned long int n, unsigned int index);
3-set_bit.c int set_bit(unsigned long int *n, unsigned int index);
4-clear_bit.c int clear_bit(unsigned long int *n, unsigned int index);
5-flip_bits.c unsigned int flip_bits(unsigned long int n, unsigned long int m);
100-get_endianness.c int get_endianness(void);

Tasks 📃

  • 0. 0

    • 0-binary_to_uint.c: C function that converts a binary number to an unsigned int.
    • The parameter b is a pointer to a string of 0 and 1 characters.
    • If b is NULL or there are one or more characters in b that are not 0 or 1 - returns 0.
    • Otherwise - returns the converted number.

  • 1. 1

    • 1-print_binary.c: C function that prints the binary representation of a number.

  • 2. 10

    • 2-get_bit.c: C function that returns the value of a bit at a given index.
    • Indices start at 0.
    • If an error occurs - returns -1.
    • Otherwise - returns the value of the bit at the given index.

  • 3. 11

    • 3-set_bit.c: C function that sets the value of a bit at a given index to 1.
    • If an error occurs - returns -1.
    • Otherwise - returns 1.

  • 4. 100

    • 4-clear_bit.c: C function that sets the value of a bit at a given index to 0.
    • If an error occurs - returns -1.
    • Otherwise - returns 1.

  • 5. 101

    • 5-flip_bits.c: C function that returns the number of bits needed to be flipped to get from one number to another.

  • 6. Endianness

    • 100-get_endianness.c: C function that checks the endianness.
    • If big-endian - returns 0.
    • If little-endian - returns 1.

  • 7. Crackme3