Null-terminated wide strings
A null-terminated wide string is a sequence of valid wide characters, ending with a null character.
Functions
Character classification |
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Defined in header <cwctype> |
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|---|---|
| checks if a wide character is alphanumeric (function) |
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| checks if a wide character is alphabetic (function) |
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| checks if a wide character is lowercase (function) |
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| checks if a wide character is an uppercase character (function) |
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| checks if a wide character is a digit (function) |
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| checks if a wide character is a hexadecimal character (function) |
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| checks if a wide character is a control character (function) |
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| checks if a wide character is a graphical character (function) |
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| checks if a wide character is a space character (function) |
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(C++11)
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checks if a wide character is a blank character (function) |
| checks if a wide character is a printing character (function) |
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| checks if a wide character is a punctuation character (function) |
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classifies a wide character according to the specified LC_CTYPE category (function) |
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| looks up a character classification category in the current C locale (function) |
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Character manipulation |
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Defined in header <cwctype> |
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| converts a wide character to lowercase (function) |
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| converts a wide character to uppercase (function) |
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performs character mapping according to the specified LC_CTYPE mapping category (function) |
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| looks up a character mapping category in the current C locale (function) |
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| ASCII values | characters | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| decimal | hexadecimal | octal | |||||||||||||
| 0–8 | \x0–\x8 |
\0–\10 |
control codes (NUL, etc.) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 9 | \x9 |
\11 |
tab (\t) |
≠0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 10–13 | \xA–\xD |
\12–\15 |
whitespaces (\n, \v, \f, \r) |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 14–31 | \xE–\x1F |
\16–\37 |
control codes | ≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 32 | \x20 |
\40 |
space | 0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 33–47 | \x21–\x2F |
\41–\57 |
!"#$%&'()*+,-./ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 48–57 | \x30–\x39 |
\60–\71 |
0123456789 |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
0 |
0 |
0 |
≠0 |
≠0 |
| 58–64 | \x3A–\x40 |
\72–\100 |
:;<=>?@ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 65–70 | \x41–\x46 |
\101–\106 |
ABCDEF |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
≠0 |
| 71–90 | \x47–\x5A |
\107–\132 |
GHIJKLMNOPQRSTUVWXYZ |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
≠0 |
0 |
0 |
0 |
| 91–96 | \x5B–\x60 |
\133–\140 |
[\]^_` |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 97–102 | \x61–\x66 |
\141–\146 |
abcdef |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
≠0 |
| 103–122 | \x67–\x7A |
\147–\172 |
ghijklmnopqrstuvwxyz |
0 |
≠0 |
0 |
0 |
≠0 |
0 |
≠0 |
≠0 |
0 |
≠0 |
0 |
0 |
| 123–126 | \x7B–\x7E |
\172–\176 |
{|}~ |
0 |
≠0 |
0 |
0 |
≠0 |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 127 | \x7F |
\177 |
backspace character (DEL) |
≠0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Conversions to numeric formats |
|
Defined in header <cwchar> |
|
|---|---|
| converts a wide string to an integer value (function) |
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| converts a wide string to an unsigned integer value (function) |
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| converts a wide string to a floating-point value (function) |
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Defined in header <cinttypes> |
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|
(C++11)(C++11)
|
converts a wide string to std::intmax_t or std::uintmax_t (function) |
String manipulation |
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Defined in header <cwchar> |
|
|---|---|
| copies one wide string to another (function) |
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| copies a certain amount of wide characters from one string to another (function) |
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| appends a copy of one wide string to another (function) |
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| appends a certain amount of wide characters from one wide string to another (function) |
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transform a wide string so that wcscmp would produce the same result as wcscoll (function) |
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String examination |
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Defined in header <cwchar> |
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| returns the length of a wide string (function) |
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| compares two wide strings (function) |
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| compares a certain amount of characters from two wide strings (function) |
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| compares two wide strings in accordance to the current locale (function) |
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| finds the first occurrence of a wide character in a wide string (function) |
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| finds the last occurrence of a wide character in a wide string (function) |
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| returns the length of the maximum initial segment that consists of only the wide characters found in another wide string (function) |
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| returns the length of the maximum initial segment that consists of only the wide not found in another wide string (function) |
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| finds the first location of any wide character in one wide string, in another wide string (function) |
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| finds the first occurrence of a wide string within another wide string (function) |
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| finds the next token in a wide string (function) |
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Wide character array manipulation |
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Defined in header <cwchar> |
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|---|---|
| copies a certain amount of wide characters between two non-overlapping arrays (function) |
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| copies a certain amount of wide characters between two, possibly overlapping, arrays (function) |
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| compares a certain amount of wide characters from two arrays (function) |
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| finds the first occurrence of a wide character in a wide character array (function) |
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| copies the given wide character to every position in a wide character array (function) |
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Types
Defined in header <cwctype> |
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|---|---|
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wctrans_t
|
scalar type that holds locale-specific character mapping (typedef) |
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wctype_t
|
scalar type that holds locale-specific character classification (typedef) |
Defined in header <cwctype> |
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Defined in header <cwchar> |
|
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wint_t
|
integer type that can hold any valid wide character and at least one more value (typedef) |
Macros
Defined in header <cwchar> |
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|---|---|
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WEOF
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a non-character value of type std::wint_t used to indicate errors (macro constant) |
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WCHAR_MIN
|
the smallest valid value of wchar_t (macro constant) |
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WCHAR_MAX
|
the largest valid value of wchar_t (macro constant) |
See also
C documentation for Null-terminated wide strings |
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