Standard library header <cstring>
This header was originally in the C standard library as <string.h>.
This header is for C-style null-terminated byte strings.
Macros |
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| implementation-defined null pointer constant (macro constant) |
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Types |
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unsigned integer type returned by the sizeof operator (typedef) |
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Functions |
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String manipulation |
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| copies one string to another (function) |
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| copies a certain amount of characters from one string to another (function) |
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| concatenates two strings (function) |
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| concatenates a certain amount of characters of two strings (function) |
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transform a string so that strcmp would produce the same result as strcoll (function) |
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(C++26) | allocates a copy of a string (function) |
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(C++26) | allocates a copy of a string of specified size (function) |
String examination |
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| returns the length of a given string (function) |
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| compares two strings (function) |
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| compares a certain number of characters from two strings (function) |
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| compares two strings in accordance to the current locale (function) |
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| finds the first occurrence of a character (function) |
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| finds the last occurrence of a character (function) |
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| returns the length of the maximum initial segment that consists of only the characters found in another byte string (function) |
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| returns the length of the maximum initial segment that consists of only the characters not found in another byte string (function) |
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| finds the first location of any character from a set of separators (function) |
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| finds the first occurrence of a substring of characters (function) |
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| finds the next token in a byte string (function) |
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Character array manipulation |
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| searches an array for the first occurrence of a character (function) |
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| compares two buffers (function) |
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(C++26) | fills a buffer with a character (function) |
| copies one buffer to another (function) |
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| moves one buffer to another (function) |
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(C++26) | copies one buffer to another, stopping after the specified delimiter (function) |
Miscellaneous |
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| returns a text version of a given error code (function) |
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Notes
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NULLis also defined in the following headers: -
std::size_tis also defined in the following headers:
Synopsis
#define __STDC_VERSION_STRING_H__ 202311L
namespace std {
using size_t = /* implementation-defined */; // freestanding
void* memcpy(void* s1, const void* s2, size_t n); // freestanding
void* memccpy(void* s1, const void* s2, int c, size_t n); // freestanding
void* memmove(void* s1, const void* s2, size_t n); // freestanding
char* strcpy(char* s1, const char* s2); // freestanding
char* strncpy(char* s1, const char* s2, size_t n); // freestanding
char* strdup(const char* s);
char* strndup(const char* s, size_t size);
char* strcat(char* s1, const char* s2); // freestanding
char* strncat(char* s1, const char* s2, size_t n); // freestanding
int memcmp(const void* s1, const void* s2, size_t n); // freestanding
int strcmp(const char* s1, const char* s2); // freestanding
int strcoll(const char* s1, const char* s2);
int strncmp(const char* s1, const char* s2, size_t n); // freestanding
size_t strxfrm(char* s1, const char* s2, size_t n);
const void* memchr(const void* s, int c, size_t n); // freestanding
void* memchr(void* s, int c, size_t n); // freestanding
const char* strchr(const char* s, int c); // freestanding
char* strchr(char* s, int c); // freestanding
size_t strcspn(const char* s1, const char* s2); // freestanding
const char* strpbrk(const char* s1, const char* s2); // freestanding
char* strpbrk(char* s1, const char* s2); // freestanding
const char* strrchr(const char* s, int c); // freestanding
char* strrchr(char* s, int c); // freestanding
size_t strspn(const char* s1, const char* s2); // freestanding
const char* strstr(const char* s1, const char* s2); // freestanding
char* strstr(char* s1, const char* s2); // freestanding
char* strtok(char* s1, const char* s2);
void* memset(void* s, int c, size_t n); // freestanding
void* memset_explicit(void* s, int c, size_t n); // freestanding
char* strerror(int errnum);
size_t strlen(const char* s); // freestanding
}
#define NULL /* implementation-defined */ // freestanding
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