Symbian
Symbian Developer Library

SYMBIAN OS V9.4

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#include <CTYPE.H>
Link against: estlib.lib

_CTYPE_H_

_CTYPE_H_

Description

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isascii

isascii (c) ((unsigned)(c)<=0177)

Description

not strict ansi, but popular nevertheless

Parameters

c

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toascii

toascii (c) ((c)&0177)

Description

Parameters

c

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isalnum(int)

IMPORT_C int isalnum(int c);

Description

Tests whether the character is alphabetic or a decimal digit.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

non-zero for true and zero for false. If the parameter is not in the domain of the function, the return result is undefined.

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isalpha(int)

IMPORT_C int isalpha(int c);

Description

Test for an alphabetic character. For Unicode, the function returns TRUE for all letters, including those from syllabaries and ideographic scripts. The function returns FALSE for letter-like characters that are in fact diacritics. Specifically, the function returns TRUE for categories: ELuCategory, ELtCategory, ELlCategory, and ELoCategory; it returns FALSE for all other categories including ELmCategory.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is alphabetic; false, otherwise.

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iscntrl(int)

IMPORT_C int iscntrl(int c);

Description

Tests whether the character is a control character. For Unicode, the function returns TRUE for all characters in the categories: ECcCategory, ECfCategory, ECsCategory, ECoCategory and ECnCategoryCc.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is a control character; false, otherwise.

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isdigit(int)

IMPORT_C int isdigit(int c);

Description

Tests whether the character is a standard decimal digit. For Unicode, this function returns TRUE only for the digits '0'...'9' (U+0030...U+0039), not for other digits in scripts like Arabic, Tamil, etc.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is a standard decimal digit; false, otherwise.

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isgraph(int)

IMPORT_C int isgraph(int c);

Description

Tests whether the character is a graphic character. For Unicode, graphic characters include printable characters but not the space character. Specifically, graphic characters are any character except those in categories: EZsCategory,EZlCategory,EZpCategory, ECcCategory,ECfCategory,ECsCategory, ECoCategory, and ,ECnCategory. Note that for ISO Latin-1, all alphanumeric and punctuation characters are graphic.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is a graphic character; false, otherwise.

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islower(int)

IMPORT_C int islower(int c);

Description

Tests if character is a lowercase letter.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is lowercase; false, otherwise.

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isprint(int)

IMPORT_C int isprint(int c);

Description

Tests whether the character is a printable character. For Unicode, printable characters are any character except those in categories: ECcCategory, ECfCategory, ECsCategory, ECoCategory and ECnCategory. Note that for ISO Latin-1, all alphanumeric and punctuation characters, plus space, are printable.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is printable; false, otherwise.

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ispunct(int)

IMPORT_C int ispunct(int c);

Description

Tests whether the character is a punctuation character. For Unicode, punctuation characters are any character in the categories: EPcCategory, EPdCategory, EPsCategory, EPeCategory, EPiCategory, EPfCategory, EPoCategory.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is punctuation; false, otherwise.

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isspace(int)

IMPORT_C int isspace(int c);

Description

Tests whether the character is a white space character. White space includes spaces, tabs and separators. For Unicode, the function returns TRUE for all characters in the categories: EZsCategory, EZlCategory and EZpCategory, and also for the characters 0x0009 (horizontal tab), 0x000A (linefeed), 0x000B (vertical tab), 0x000C (form feed), and 0x000D (carriage return).

Parameters

int c

an integer whose value is representable as an unsigned char,

Return value

int

True, if the character is white space; false, otherwise.

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isupper(int)

IMPORT_C int isupper(int c);

Description

Tests whether the character is uppercase.

Parameters

int c

an integer whose value is representable as an unsigned char.

Return value

int

True, if the character is uppercase; false, otherwise.

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isxdigit(int)

IMPORT_C int isxdigit(int c);

Description

Tests whether the character is a hexadecimal digit (0-9, a-f, A-F).

Parameters

int c

the character to check.

Return value

int

True, if the character is a hexadecimal digit; false, otherwise.

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tolower(int)

IMPORT_C int tolower(int c);

Description

Tests whether the character is lowercase.

Parameters

int c

an argument to convert.

Return value

int

TBool True, if the character is lowercase; false, otherwise.

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toupper(int)

IMPORT_C int toupper(int c);

Description

Returns the character value after conversion to uppercase or the character's own value, if no uppercase form exists. The character object itself is not changed.

Parameters

int c

an argument to convert

Return value

int

The character value after conversion to uppercase.

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