Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 7/13/2023
Public
Document Table of Contents

String and Block Copy Intrinsics

The following table lists and describes string and block copy intrinsics that you can use on systems based on IA-32 and Intel® 64 architectures. They may invoke library functions that are more highly optimized for Intel® microprocessors than for non-Intel microprocessors.

NOTE:

strncpy() and strncmp() functions are implemented as intrinsics depending on compiler version and compiler switches like optimization level.

Intrinsic

Description

char *_strset(char *, _int32)

Sets all characters in a string to a fixed value.

int memcmp(const void *cs, const void *ct, size_t n)

Compares two regions of memory.

Return:

  • <0 if cs<ct

  • 0 if cs=ct

  • >0 if cs>ct

void *memcpy(void *s, const void *ct, size_t n)

Copies from memory. Returns s.

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

Sets memory to a fixed value. Returns s.

char *strcat(char *s, const char *ct)

Appends to a string. Returns s.

int strcmp(const char *, const char *)

Compares two strings. Return <0 if cs<ct, 0 if cs=ct, or >0 if cs>ct.

char *strcpy(char *s, const char *ct)

Copies a string. Returns s.

size_t strlen(const char *cs)

Returns the length of string cs.

int strncmp(char *, char *, int)

Compare two strings, but only specified number of characters.

int strncpy(char *, char *, int)

Copies a string, but only specified number of characters.