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Standard library header <string.h>

From cppreference.com
< c‎ | header
 
C
 
Standard Library headers
 

This header provides functions for handling null-terminated byte strings.

Contents

Macros

 implementation-defined null pointer constant
(macro constant) [edit]

Types

 unsigned integer type returned by the sizeof operator
(typedef) [edit]

Functions

String manipulation
(C11)
 copies one string to another
(function) [edit]
(C11)
 copies a certain amount of characters from one string to another
(function) [edit]
(C11)
 concatenates two strings
(function) [edit]
(C11)
 concatenates a certain amount of characters of two strings
(function) [edit]
transform a string so that strcmp would produce the same result as strcoll
(function) [edit]
(C23)
 allocates a copy of a string
(function) [edit]
(C23)
 allocates a copy of a string of specified size
(function) [edit]
String examination
(C11)
 returns the length of a given string
(function) [edit]
compares two strings
(function) [edit]
compares a certain amount of characters of two strings
(function) [edit]
compares two strings in accordance to the current locale
(function) [edit]
finds the first occurrence of a character
(function) [edit]
finds the last occurrence of a character
(function) [edit]
returns the length of the maximum initial segment that consists
of only the characters found in another byte string
(function) [edit]
returns the length of the maximum initial segment that consists
of only the characters not found in another byte string
(function) [edit]
finds the first location of any character in one string, in another string
(function) [edit]
finds the first occurrence of a substring of characters
(function) [edit]
(C11)
 finds the next token in a byte string
(function) [edit]
Character array manipulation
searches an array for the first occurrence of a character
(function) [edit]
compares two buffers
(function) [edit]
(C23)(C11)
 fills a buffer with a character
(function) [edit]
(C11)
 copies one buffer to another
(function) [edit]
(C11)
 moves one buffer to another
(function) [edit]
(C23)
 copies one buffer to another, stopping after the specified delimiter
(function) [edit]
Miscellaneous
(C11)(C11)
 returns a text version of a given error code
(function) [edit]

[edit] Synopsis

#define __STDC_VERSION_STRING_H__ 202311L
 
#define NULL /* see description */
 
typedef /* see description */ size_t;
 
void* memcpy(void* restrict s1, const void* restrict s2, size_t n);
void* memccpy(void* restrict s1, const void* restrict s2, int c, size_t n);
void* memmove(void* s1, const void* s2, size_t n);
char* strcpy(char* restrict s1, const char* restrict s2);
char* strncpy(char* restrict s1, const char* restrict s2, size_t n);
char* strdup(const char* s);
char* strndup(const char* s, size_t n);
char* strcat(char* restrict s1, const char* restrict s2);
char* strncat(char* restrict s1, const char* restrict s2, size_t n);
int memcmp(const void* s1, const void* s2, size_t n);
int