[cstring.syn] (original) (raw)

21 Strings library [strings]

21.5 Null-terminated sequence utilities [c.strings]

21.5.3 Header synopsis [cstring.syn]

namespace std { using size_t = see [support.types.layout];

void* memcpy(void* s1, const void* s2, size_t n); void* memmove(void* s1, const void* s2, size_t n); char* strcpy(char* s1, const char* s2); char* strncpy(char* s1, const char* s2, size_t n); char* strcat(char* s1, const char* s2); char* strncat(char* s1, const char* s2, size_t n); int memcmp(const void* s1, const void* s2, size_t n); int strcmp(const char* s1, const char* s2); int strcoll(const char* s1, const char* s2); int strncmp(const char* s1, const char* s2, size_t n); size_t strxfrm(char* s1, const char* s2, size_t n); const void* memchr(const void* s, int c, size_t n);
void* memchr(void* s, int c, size_t n);
const char* strchr(const char* s, int c);
char* strchr(char* s, int c);
size_t strcspn(const char* s1, const char* s2); const char* strpbrk(const char* s1, const char* s2);
char* strpbrk(char* s1, const char* s2);
const char* strrchr(const char* s, int c);
char* strrchr(char* s, int c);
size_t strspn(const char* s1, const char* s2); const char* strstr(const char* s1, const char* s2);
char* strstr(char* s1, const char* s2);
char* strtok(char* s1, const char* s2); void* memset(void* s, int c, size_t n); char* strerror(int errnum); size_t strlen(const char* s); }

#define NULL see [support.types.nullptr]

The contents and meaning of the header <cstring>are the same as the C standard library header <string.h>.

The functions memcpy and memmove are signal-safe .

Both functions implicitly create objects ([intro.object]) in the destination region of storage immediately prior to copying the sequence of characters to the destination.

[ Note

The functionsstrchr, strpbrk, strrchr, strstr, and memchr, have different signatures in this document, but they have the same behavior as in the C standard library .

— end note

]