# strings.h ## **Overview** **Related Modules:** [UTILS](UTILS.md) **Description:** Declares commonly used functions for byte sequence operations. You can use the functions provided in this file to perform the mathematical operations required during development. Example operations include comparing, copying byte sequences, and setting a byte sequence to 0. You must pay attention to memory management during function calls. **Since:** 1.0 **Version:** 1.0 ## **Summary** ## Functions

Function Name

Description

bcmp (const void *s1, const void *s2, size_t n)

int 

Compares byte sequences.

bcopy (const void *src, void *dest, size_t n)

void 

Copies byte sequences.

bzero (void *s, size_t n)

void 

Sets byte sequences to zero.

index (const char *s, int c)

char * 

Searches for the first position of the matched character in a string.

rindex (const char *s, int c)

char * 

Searches for the last position of the matched character in a string.

ffs (int i)

int 

Searches for the first bit in a word of the integer type.

ffsl (long int i)

int 

Searches for the first bit in a word of the long integer type.

ffsll (long long int i)

int 

Searches for the first bit in a word of the 8-byte long integer type.

strcasecmp (const char *_l, const char *_r)

int 

Compares two strings (string 1 and string 2), regardless of the letter case.

strncasecmp (const char *_l, const char *_r, size_t n)

int 

Compares a specified length of two strings (string 1 and string 2), regardless of the letter case.