Reference

string(3)

string specific functions

NAME

stpcpy, strcat, strncat, strchr, strrchr, strcmp, strncmp, strcasecmp, strncasecmp, strcpy, strncpy, strerror, strlen, strpbrk, strsep, strspn, strcspn, strstr, strtok, index, rindex – string specific functions

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <string.h>

char *

stpcpy(char *dst, const char *src);

char *

strcat(char *s, const char * append);

char *

strncat(char *s, const char *append, size_t count);

QChar *

strchr(QChar *s, int c);

QChar *

strrchr(QChar *s, int c);

int

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

int

strncmp(const char *s1, const char *s2, size_t count);

int

strcasecmp(const char *s1, const char *s2);

int

strncasecmp(const char *s1, const char *s2, size_t count);

char *

strcpy(char *dst, const char *src);

char *

strncpy(char *dst, const char *src, size_t count);

char *

strerror(int errno);

size_t

strlen(const char *s);

QChar *

strpbrk(QChar *s, const char *charset);

char *

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

size_t

strspn(const char *s, const char *charset);

size_t

strcspn(const char *s, const char *charset);

QChar *

strstr(QChar *big, const char *little);

char *

strtok(char *s, const char *delim);

char *

index(const char *s, int c);

char *

rindex(const char *s, int c);

DESCRIPTION

The string functions manipulate strings terminated by a null byte.

See the specific manual pages for more information. For manipulating variable length generic objects as byte strings (without the null byte check), see bstring(3).

Except as noted in their specific manual pages, the string functions do not test the destination for size limitations.

SEE ALSO

bstring(3), index(3), rindex(3), stpcpy(3), strcasecmp(3), strcat(3), strchr(3), strcmp(3), strcpy(3), strcspn(3), strerror(3), strlen(3), strpbrk(3), strrchr(3), strsep(3), strspn(3), strstr(3), strtok(3), simd(7)

STANDARDS

The strcat(), strncat(), strcmp(), strncmp(), strcpy(), strncpy(), strerror(), strlen(), strspn(), strcspn(), and strtok() functions conform to ISO/IEC 9899:1990 (“ISO C90”).

The strchr(), strrchr(), strpbrk(), and strstr() functions conform to ISO/IEC 9899:2024 (“ISO C23”), where they are specified as qualifier-preserving functions.

History