lv_string.h

lv_memcpy

Copies a block of memory from a source address to a destination address.

void * lv_memcpy(void *dst, const void *src, size_t len)

Returns: void * — Pointer to the destination array.

lv_memset

Fills a block of memory with a specified value.

void lv_memset(void *dst, uint8_t v, size_t len)

lv_memmove

Move a block of memory from source to destination.

void * lv_memmove(void *dst, const void *src, size_t len)

Returns: void * — Pointer to the destination array.

lv_memcmp

This function will compare two memory blocks.

int lv_memcmp(const void *p1, const void *p2, size_t len)

Returns: int — The difference between the value of the first unmatching byte.

lv_memzero

Same as memset(dst, 0x00, len).

static void lv_memzero(void *dst, size_t len)

lv_strlen

Computes the length of the string str up to (but not including) the terminating null character.

size_t lv_strlen(const char *str)

Returns: size_t — The length of the string in bytes.

lv_strnlen

Computes the length of the string str up to (but not including) the terminating null character, or the given maximum length.

size_t lv_strnlen(const char *str, size_t max_len)

Returns: size_t — The length of the string in bytes.

lv_strlcpy

Copies up to dst_size-1 (non-null) characters from src to dst. A null terminator is always added.

size_t lv_strlcpy(char *dst, const char *src, size_t dst_size)

Returns: size_t — The length of src. The return value is equivalent to the value returned by lv_strlen(src)

lv_strncpy

Copies up to dest_size characters from the string pointed to by src to the character array pointed to by dst and fills the remaining length with null bytes.

char * lv_strncpy(char *dst, const char *src, size_t dest_size)

Returns: char * — A pointer to the destination array, which is dst.

lv_strcpy

Copies the string pointed to by src, including the terminating null character, to the character array pointed to by dst.

char * lv_strcpy(char *dst, const char *src)

Returns: char * — A pointer to the destination array, which is dst.

lv_strcmp

This function will compare two strings without specified length.

int lv_strcmp(const char *s1, const char *s2)

Returns: int — the difference between the value of the first unmatching character.

lv_strncmp

This function will compare two strings up to the given length.

int lv_strncmp(const char *s1, const char *s2, size_t len)

Returns: int — the difference between the value of the first unmatching character.

lv_streq

Returns true if the two strings are equal. Just a wrapper around strcmp for convenience.

static bool lv_streq(const char *s1, const char *s2)

Returns: bool — true: the strings are equal; false: otherwise

lv_strdup

Duplicate a string by allocating a new one and copying the content.

char * lv_strdup(const char *src)

Returns: char * — A pointer to the new allocated string. NULL if failed.

lv_strndup

Duplicate a string by allocating a new one and copying the content up to the end or the specified maximum length, whichever comes first.

char * lv_strndup(const char *src, size_t max_len)

Returns: char * — Pointer to a newly allocated null-terminated string. NULL if failed.

lv_strcat

Copies the string pointed to by src, including the terminating null character, to the end of the string pointed to by dst.

char * lv_strcat(char *dst, const char *src)

Returns: char * — A pointer to the destination string, which is dst.

lv_strncat

Copies up to src_len characters from the string pointed to by src to the end of the string pointed to by dst. A terminating null character is appended to dst even if no null character was encountered in src after src_len characters were copied.

char * lv_strncat(char *dst, const char *src, size_t src_len)

Returns: char * — A pointer to the destination string, which is dst.

lv_strchr

Searches for the first occurrence of character c in the string str.

char * lv_strchr(const char *str, int c)

Returns: char * — A pointer to the first occurrence of character c in the string str, or a null pointer if c is not found.