C Type Library
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C Type Library

The mikroPascal PRO for PIC32 provides a set of library functions for testing and mapping characters.

Library Functions

isalnum

Prototype

function isalnum(character : byte) : word
Description

Function returns 0xFF if the character is alphanumeric (A-Z, a-z, 0-9), otherwise returns zero.
Example 
res := isalnum('o');   // returns 0xFF
res := isalnum('\r');  // returns 0

isalpha

Prototype

function isalpha(character : byte) : word
Description

Function returns 0xFF if the character is alphabetic (A-Z, a-z), otherwise returns zero.
Example 
res := isalpha('A');  // returns 0xFF
res := isalpha('1');  // returns 0

iscntrl

Prototype

function iscntrl(character : byte) : word
Description

Function returns 0xFF if the character is a control or delete character(decimal 0-31 and 127), otherwise returns zero.
Example 
res := iscntrl('\r');  // returns 0xFF
res := iscntrl('o');   // returns 0

isdigit

Prototype

function isdigit(character : byte) : word
Description

Function returns 0xFF if the character is a digit (0-9), otherwise returns zero.
Example 
res := isdigit('1');  // returns 0xFF
res := isdigit('o');  // returns 0

isgraph

Prototype

function isgraph(character : byte) : word
Description

Function returns 0xFF if the character is a printable, excluding the space (decimal 32), otherwise returns zero.
Example 
res := isgraph('o');  // returns 0xFF
res := isgraph(' ');  // returns 0

islower

Prototype

function islower(character : byte) : word
Description

Function returns 0xFF if the character is a lowercase letter (a-z), otherwise returns zero.
Example 
res := islower('0');  // returns 0xFF
res := islower('A');  // returns 0

ispunct

Prototype

function ispunct(character : byte) : word
Description

Function returns 0xFF if the character is a punctuation (decimal 32-47, 58-63, 91-96, 123-126), otherwise returns zero.
Example 
res := ispunct('.');  // returns 0xFF
res := ispunct('1');  // returns 0

isspace

Prototype

function isspace(character : byte) : word
Description

Function returns 0xFF if the character is a white space (space, tab, CR, HT, VT, NL, FF), otherwise returns zero.
Example 
res := isspace(' ');  // returns 0xFF
res := isspace('1');  // returns 0

isupper

Prototype

function isupper(character : byte) : word
Description

Function returns 0xFF if the character is an uppercase letter (A-Z), otherwise returns zero.
Example 
res := isupper('A');  // returns 0xFF
res := isupper('a');  // returns 0

isxdigit

Prototype

function isxdigit(character : byte) : word
Description

Function returns 0xFF if the character is a hex digit (0-9, A-F, a-f), otherwise returns zero.
Example 
res := isxdigit('A');  // returns 0xFF
res := isxdigit('P');  // returns 0

toupper

Prototype

function toupper(character : byte) : byte
Description

If the character is a lowercase letter (a-z), the function returns an uppercase letter. Otherwise, the function returns an unchanged input parameter.
Example 
res := toupper('a');  // returns A
res := toupper('B');  // returns B

tolower

Prototype

function tolower(character : byte) : byte
Description

If the character is an uppercase letter (A-Z), function returns a lowercase letter. Otherwise, function returns an unchanged input parameter.
Example 
res := tolower('A');  // returns a
res := tolower('b');  // returns b
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