util_string.c File Reference

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>

Go to the source code of this file.

Functions
bool	StringStartsWith (char *str, char *seq)
bool	HexToString (uint8_t *bin, uint8_t binsz, char **result)
char *	StringToHexString (char *bin, unsigned int binsz, char **result)

Function Documentation

HexToString()

bool HexToString	(	uint8_t *	bin,
		uint8_t	binsz,
		char **	result
	)

Definition at line 37 of file util_string.c.

                                                              {
    char hex_str[] = "0123456789abcdef";
    uint8_t i;

    // ALLOCATE MEMORY
    // Hex to string/char array: one value becomes two chars (*2)
    //   +1 because of NULL termination
    // "*result =" ~ Value at memory location gets changed
    if (!(*result = (char *)malloc(binsz * 2 + 1))){
        return (false); // Returned when NULL
    }

    // Add NULL termination
    (*result)[binsz * 2] = 0; // Last memory location, "0" ~ '\0'

    // CHECK MEMORY
    if (!binsz){
        return (false); // Returned when NULL
    }

    // FILL WITH DATA
    for (i = 0; i < binsz; i++){
      (*result)[i * 2 + 0] = hex_str[(bin[i] >> 4) & 0x0F];
      (*result)[i * 2 + 1] = hex_str[(bin[i]     ) & 0x0F];
    }

    return (true);
}

StringStartsWith()

bool StringStartsWith	(	char *	str,
		char *	seq
	)

Definition at line 27 of file util_string.c.

                                             {
    uint8_t i;
    for(i=0; i<strlen(seq); i++){
        if(*(str+i) != *(seq+i)){
            return (false);
        }
    }
    return (true);
}

StringToHexString()

char* StringToHexString	(	char *	bin,
		unsigned int	binsz,
		char **	result
	)

Definition at line 66 of file util_string.c.

                                                                        {
    char hex_str[] = "0123456789abcdef";
    unsigned int i;

    if (!(*result = (char *)malloc(binsz * 2 + 1))){
        return (NULL);
    }

    (*result)[binsz * 2] = 0;

    if (!binsz){
        return (NULL);
    }

    for (i = 0; i < binsz; i++){
      (*result)[i * 2 + 0] = hex_str[(bin[i] >> 4) & 0x0F];
      (*result)[i * 2 + 1] = hex_str[(bin[i]     ) & 0x0F];
    }

    return (*result);
}