include/string.h File Reference

Standard string operations. More...

#include <types.h>

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Functions
void *	memcpy (void *dest, const void *src, size_t n)
	Copy memory area.
void *	memset (void *s, int c, size_t n)
	Initialize memory area.
void *	memchr (const void *s, int c, size_t n)
	Search a memory area for a character.
int	strcmp (const char *s1, const char *s2)
	Compare the two strings s1 and s2.
size_t	strlen (const char *s)
	Calculate the length of the string s.
char *	strchr (const char *s, int c)
	Locate the character c in the string s.

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Detailed Description

Standard string operations.

• Compiler: IAR EWAVR32 and GNU GCC for AVR32
• Supported devices: All devices
• AppNote:

Author:

Atmel Corporation: http://www.atmel.com
Support and FAQ: http://support.atmel.no/

Definition in file string.h.

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Function Documentation

void* memchr	(	const void *	s,
		int	c,
		size_t	n
	)

Search a memory area for a character.

Scan the memory area from s to s + n (non-inclusive) for the occurrence of c.

Parameters:

	s	Pointer to start of memory area.
	c	Character to look for.
	n	Size of memory area.

Returns:

Pointer to the matching character or NULL if c doesn't occur in the given memory area.

void* memcpy	(	void *	dest,
		const void *	src,
		size_t	n
	)

Copy memory area.

Copy n bytes from src to dest.

Parameters:

	dest	Pointer to the destination memory area.
	src	Pointer to the source memory area.
	n	The number of bytes to copy.

Returns:

The dest parameter.

Referenced by console_drv_write(), and udc_ep0_write_sync().

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

Initialize memory area.

Fill the first n bytes of the memory area s with the constant byte value c.

Parameters:

	s	Pointer to the memory area to be filled.
	c	The byte value to use as fill value.
	n	The number of bytes to initialize.

Returns:

The s parameter.

Referenced by aesblk_alloc_req(), block_copy_alloc(), dummy_blkdev_init(), journal_init(), sdmmc_blkdev_init_new(), sdmmc_mcihost_init(), sdmmc_probe_init(), and usb_func_add_config().

char* strchr	(	const char *	s,
		int	c
	)

Locate the character c in the string s.

Parameters:

	s	A NUL-terminated string.
	c	The character to look for.

Returns:

A pointer to the first occurrence of the character c in the string s or NULL if c was not found.

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

Compare the two strings s1 and s2.

Parameters:

	s1	A NUL-terminated string.
	s2	Another NUL-terminated string.

Return values:

	<0	s1 is less than s2.
	0	s1 equals s2.
	>0	s1 is greater than s2.

size_t strlen

(

const char *

s

)

Calculate the length of the string s.

Parameters:

s

A NUL-terminated string.

Returns:

The number of characters in s before the terminating '\0' character.

Referenced by console_drv_putstr().