C-library functions:

atoi

int atoi(char *s);

atoib

int atoib(char *s, int b);

dtoi

int dtoi(char *decstr, int *nbr);

utoi

int utoi(char *decstr,int *nbr);

otoi

int otoi(char *octstr, int *nbr);

xtoi

int xtoi(char *hexstr, int *nbr);

itoa

void itoa(int n, char * pstr);

itoab

void itoab(int n, char *s, int b);

itod

char * itod(int nbr, char str[], int sz);

itoo

char * itoo(int nbr, char str[], int sz);

itou

char * itou(int nbr, char str[], int sz);

itox

char * itox(int nbr, char str[], int sz);

bcopy

void bcopy(char *pSrc, char *pDest, int num);

bzero

int bzero(char * ptr, int nbytes);

memset

void memset(char *pMem, char ch, int num);

Fills a memory-area (num bytes from address pMem) with the given byte-value ch.

reverse

void reverse(char *s);

strcat

void strcat(char * str1,char * str2);

strchr

char * strchr(char * str, int chr);

strcmp

int strcmp(char *s, char *t);

toascii

int toascii(int c);

tolower

int tolower(int c);

toupper

int toupper(int c);

is-family

Syntax
int isalnum( int c );
int isalpha( int c );
int isascii( int c );
int isatty( int c );
int iscntrl( int c );
int iscons( int c );
int isdigit( int c );
int isgraph( int c );
int islower( int c );
int isodigit( int c );
int isprint( int c );
int ispunct( int c );
int isspace( int c );
int isupper( int c );
int isxdigit( int c );
int iswhite( int c );

Parameter Description
c: Integer to be tested


Each function in the is family tests a given integer value, returning a nonzero value if the integer satisfies the test condition and 0 if it does not. The ASCII character set is assumed.

The is functions and their test conditions are listed below:

Function	Test Condition
isalnum	Alphanumeric ('A'-'Z', 'a'-'z', or '0'-'9')
isalpha	Letter ('A'-'Z' or 'a'-'z')
isascii	ASCII character (0x00 - 0x7F)
isatty	c is a device
iscntrl	Control character (0x00 - 0x1F or 0x7F)
iscons	c is the console device
isdigit	Digit ('0'-'9')
isgraph	Printable character except space (0x21 - 0x7E)
islower	Lowercase letter ('a'-'z')
isodigit	Octal digit ('0'-'7')
isprint	Printable character (0x20 - 0x7E)
ispunct	Punctuation character (all but alphanumeric and control characters)
isspace	White-space character (0x09 - 0x0D or 0x20)
isupper	Uppercase letter ('A'-'Z')
iswhite	c <= 0x20, c >= 0x7F
isxdigit	Hexadecimal digit ('A'-'F','a'-'f', or '0'-'9')

The isascii routine produces meaningful results for all integer values. However, the remaining routines produce a defined result only for integer values corresponding to the ASCII character set (that is, only where isascii holds true).


Return Value

These routines return a nonzero value if the integer satisfies the test condition and 0 if it does not.