string.h File Reference

#include <stddef.h>

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Functions
void *	memcpy (void *dest, const void *src, size_t len)
void *	memset (void *dest, int val, size_t len)
int	strcmp (const char *s1, const char *s2)
size_t	strlen (const char *str)
char *	strcpy (char *dest, const char *src)
char *	strtok (const char *str, const char *delim)
char *	strrev (char *str)
void	int_to_ascii (int n, char *str)
void	hex_to_ascii (unsigned int n, char *str)
void	append (char *s, char n)
void	backspace (char *s)

Function Documentation

append()

void append	(	char *	s,
		char	n
	)

Appends a character to a string

Parameters

s	The string
n	The character to append

backspace()

void backspace

(

char *

s

)

Deletes the last character of a string

Parameters

s	The string

hex_to_ascii()

void hex_to_ascii	(	unsigned int	n,
		char *	str
	)

Converts a number to a base 16 string

Parameters

n	The number to convert
str	A buffer to hold the converted number

int_to_ascii()

void int_to_ascii	(	int	n,
		char *	str
	)

Converts a number to a base 10 string

Parameters

n	The number to convert
str	A buffer to hold the converted number

memcpy()

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

Copies a block of memory from one address to another

Parameters

dest	The destination address
src	The source address
len	The length of the block

Returns

the destination address

memset()

void* memset	(	void *	dest,
		int	val,
		size_t	len
	)

Sets a block of memory to a byte

Parameters

dest	The block to set
val	The byte to set it to
len	The length of the block

Returns

the destination address

strcmp()

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

Compares two strings

Parameters

s1	String 1 to compare
s2	String 2 to compare

Returns

0 if the strings are the same, otherwise the difference between the values of the first non-identical character

strcpy()

char* strcpy	(	char *	dest,
		const char *	src
	)

Copies a string from one address to another

Parameters

dest	The destination string
src	The source string

Returns

the destination string

strlen()

size_t strlen

(

const char *

str

)

Gets the length of a string

Parameters

str	The string to get the length of

Returns

the length of the string

strrev()

char* strrev

(

char *

str

)

Reverses a string in place

Parameters

str	The string to reverse

Returns

the string

strtok()

char* strtok	(	const char *	str,
		const char *	delim
	)

Reads characters from a string until it hits a delimeter character

Parameters

str	The string to read from (or NULL if you are continuing tokenization)
delim	A stribg containing possible delimeter characters.

Returns

the read characters, not including the delmimeter. This string will be overwritten by sucessive calls to strtok.