string.h

strdupa(x)   strcpy(alloca(strlen(x)+1),x)

Copies a string to a new position.

memcpy (void *__restrict dest, const void *__restrict src, size_t n)

void * 

Copies a string (overlapping not allowed).

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

void * 

Copies a string (overlapping allowed).

memset (void *s, int c, size_t n)

void * 

Copies a character to the specified memory area.

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

int 

Compares two memory areas.

memchr (const void *s, int c, size_t n)

void * 

Searches for a character in the specified memory area.

strcpy (char *dest, const char *src)

char * 

Copies a string.

strncpy (char *dest, const char *src, size_t n)

char * 

Copies n characters of a string.

strcat (char *dest, const char *src)

char * 

Appends a string to another one.

strncat (char *dest, const char *src, size_t n)

char * 

Appends the first n bytes of a string to another one.

strcmp (const char *s1, const char *s2)

int 

Compares two strings by characters.

strncmp (const char *s1, const char *s2, size_t n)

int 

Compares the first n characters of two strings.

strcoll (const char *s1, const char *s2)

int 

Compares two strings by character for the program's current locale.

strcoll_l (const char *s1, const char *s2, locale_t locale)

int 

Compares two strings by character for the specified locale.

strxfrm (char *dest, const char *src, size_t n)

size_t 

Converts the first n characters of the source string pointed to by src based on the program's current locale specified by LC_COLLATE, and places them in the destination string pointed to by dest.

strchr (const char *s, int c)

char * 

Locates the first occurrence of a character in a string.

strrchr (const char *s, int c)

char * 

Locates the last occurrence of a character in a string.

strcspn (const char *s, const char *reject)

size_t 

Obtains the length of the initial segment of a string that contains characters not in reject.

strspn (const char *s, const char *accept)

size_t 

Obtains the length of the initial segment of a string that contains characters in accept.

strpbrk (const char *s, const char *accept)

char * 

Searches for any of a set of characters in a string.

strstr (const char *haystack, const char *needle)

char * 

Searches for a needle string in its haystack string.

strtok (char *str, const char *delim)

char * 

Separates a string into a series of tokens separated by a delimiter.

strlen (const char *s)

size_t 

Calculates the length of a string.

strerror (int errnum)

char * 

Obtains an error description string of the specified error code.

strtok_r (char *str, const char *delim, char **saveptr)

char * 

Separates a string into a series of tokens separated by a delimiter, with the saveptr parameter specified.

strerror_l (int errnum, locale_t locale)

char * 

Obtains an error description string of the specified error code for the specified locale.

strerror_r (int errnum, char *buf, size_t buflen)

char * 

Obtains an error description string of the specified error code.

stpcpy (char *dest, const char *src)

char * 

Copies a string.

stpncpy (char *dest, const char *src, size_t n)

char * 

Copies n characters of a string.

strnlen (const char *s, size_t maxlen)

size_t 

Calculates the length of a string.

strdup (const char *s)

char * 

Copies a string to a new position.

strndup (const char *s, size_t n)

char * 

Copies n characters of a string to a new position.

strsignal (int sig)

char * 

Returns a string describing the signal number.

memccpy (void *__restrict dest, const void *__restrict src, int c, size_t n)

void * 

Copies a memory area to another one.

strsep (char **stringp, const char *delim)

char * 

Separates a string into a series of tokens separated by a delimiter.

strlcat (char *d, const char *s, size_t n)

size_t 

Appends the first n bytes of a string to another one.

strlcpy (char *d, const char *s, size_t n)

size_t 

Copies a string.

strverscmp (const char *s1, const char *s2)

int 

Compares strings of two versions (string 1 and string 2) and returns the comparison result.

strcasestr (const char *haystack, const char *needle)

char * 

Searches for a needle string in its haystack string and returns a pointer.

memmem (const void *haystack, size_t haystacklen, const void *needle, size_t needlelen)

void * 

Searches for a needle string in its haystack string.

memrchr (const void *s, int c, size_t n)

void * 

Searches for a character in the specified memory area.

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

void * 

Copies a string (overlapping not allowed).