A null-terminated wide string is a sequence of valid wide characters, ending with a null-character.
Functions
Character classification | |
| Defined in header <wctype.h> | |
|---|---|
| (C95) | checks if a wide character is alphanumeric (function) |
| (C95) | checks if a wide character is alphabetic (function) |
| (C95) | checks if a wide character is an lowercase character (function) |
| (C95) | checks if a wide character is an uppercase character (function) |
| (C95) | checks if a wide character is a digit (function) |
| (C95) | checks if a character is a hexadecimal character (function) |
| (C95) | checks if a wide character is a control character (function) |
| (C95) | checks if a wide character is a graphical character (function) |
| (C95) | checks if a wide character is a space character (function) |
| (C99) | checks if a wide character is a blank character (function) |
| (C95) | checks if a wide character is a printing character (function) |
| (C95) | checks if a wide character is a punctuation character (function) |
| (C95) | classifies a wide character according to the specified LC_CTYPE category (function) |
| (C95) | looks up a character classification category in the current C locale (function) |
Character manipulation | |
| Defined in header <wctype.h> | |
| (C95) | converts a wide character to lowercase (function) |
| (C95) | converts a wide character to uppercase (function) |
| (C95) | performs character mapping according to the specified LC_CTYPE mapping category (function) |
| (C95) | looks up a character mapping category in the current C locale (function) |
| ASCII values (hex) | characters | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 - 8 | 0x00-0x08 | control codes (NUL, etc.) | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 9 | 0x09 | tab (\t) | ≠0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10 - 13 | 0x0A-0x0D | whitespaces (\n,\v,\f,\r) | ≠0 | 0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 14 - 31 | 0x0E-0x1F | control codes | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 32 | 0x20 | space | 0 | ≠0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 33 - 47 | 0x21-0x2F | !"#$%&'()*+,-./ | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 48 - 57 | 0x30-0x39 | 0123456789 | 0 | ≠0 | 0 | 0 | ≠0 | 0 | ≠0 | 0 | 0 | 0 | ≠0 | ≠0 |
| 58 - 64 | 0x3a-0x40 | :;<=>?@ | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 65 - 70 | 0x41-0x46 | ABCDEF | 0 | ≠0 | 0 | 0 | ≠0 | 0 | ≠0 | ≠0 | ≠0 | 0 | 0 | ≠0 |
| 71 - 90 | 0x47-0x5A | GHIJKLMNOPQRSTUVWXYZ | 0 | ≠0 | 0 | 0 | ≠0 | 0 | ≠0 | ≠0 | ≠0 | 0 | 0 | 0 |
| 91 - 96 | 0x5B-0x60 | [\]^_` | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 97 -102 | 0x61-0x66 | abcdef | 0 | ≠0 | 0 | 0 | ≠0 | 0 | ≠0 | ≠0 | 0 | ≠0 | 0 | ≠0 |
| 103-122 | 0x67-0x7A | ghijklmnopqrstuvwxyz | 0 | ≠0 | 0 | 0 | ≠0 | 0 | ≠0 | ≠0 | 0 | ≠0 | 0 | 0 |
| 123-126 | 0x7B-0x7E | {|}~ | 0 | ≠0 | 0 | 0 | ≠0 | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 127 | 0x7F | backspace character (DEL) | ≠0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Conversions to numeric formats | |
| Defined in header <wchar.h> | |
|---|---|
| (C95)(C99) | converts a wide string to an integer value (function) |
| (C95)(C99) | converts a wide string to an unsigned integer value (function) |
| (C99)(C95)(C99) | converts a wide string to a floating point value (function) |
| Defined in header <inttypes.h> | |
| (C99)(C99) | converts a wide string to intmax_t or uintmax_t (function) |
String manipulation | |
| Defined in header <wchar.h> | |
|---|---|
| (C95)(C11) | copies one wide string to another (function) |
| (C95)(C11) | copies a certain amount of wide characters from one string to another (function) |
| (C95)(C11) | appends a copy of one wide string to another (function) |
| (C95)(C11) | appends a certain amount of wide characters from one wide string to another (function) |
| (C95) | transform a wide string so that wcscmp would produce the same result as wcscoll (function) |
String examination | |
| Defined in header <wchar.h> | |
| (C95)(C11) | returns the length of a wide string (function) |
| (C95) | compares two wide strings (function) |
| (C95) | compares a certain amount of characters from two wide strings (function) |
| (C95) | compares two wide strings in accordance to the current locale (function) |
| (C95) | finds the first occurrence of a wide character in a wide string (function) |
| (C95) | finds the last occurrence of a wide character in a wide string (function) |
| (C95) | returns the length of the maximum initial segment that consists of only the wide characters found in another wide string (function) |
| (C95) | returns the length of the maximum initial segment that consists of only the wide chars not found in another wide string (function) |
| (C95) | finds the first location of any wide character in one wide string, in another wide string (function) |
| (C95) | finds the first occurrence of a wide string within another wide string (function) |
| (C95)(C11) | finds the next token in a wide string (function) |
Wide character array manipulation | |
| Defined in header <wchar.h> | |
|---|---|
| (C95)(C11) | copies a certain amount of wide characters between two non-overlapping arrays (function) |
| (C95)(C11) | copies a certain amount of wide characters between two, possibly overlapping, arrays (function) |
| (C95) | compares a certain amount of wide characters from two arrays (function) |
| (C95) | finds the first occurrence of a wide character in a wide character array (function) |
| (C95) | copies the given wide character to every position in a wide character array (function) |
Types
| Defined in header <stddef.h> | |
|---|---|
wchar_t | integer type that can hold any valid wide character |
| Defined in header <wctype.h> | |
wint_t(C95) | integer type that can hold any valid wide character and at least one more value |
wctrans_t(C95) | scalar type that holds locale-specific character mapping |
wctype_t(C95) | scalar type that holds locale-specific character classification |
Macros
| Defined in header <wchar.h> | |
|---|---|
| WEOF (C95) | a non-character value of type wint_t used to indicate errors (macro constant) |
| WCHAR_MIN (C95) | the smallest valid value of wchar_t (macro constant) |
| WCHAR_MAX (C95) | the largest valid value of wchar_t (macro constant) |
References
- C11 standard (ISO/IEC 9899:2011):
- 7.19 Common definitions <stddef.h> (p: 288)
- 7.29 Extended multibyte and wide character utilities <wchar.h> (p: 402-446)
- 7.30 Wide character classification and mapping utilities <wctype.h> (p: 447-454)
- 7.31.16 Extended multibyte and wide character utilities <wchar.h> (p: 456)
- 7.31.17 Wide character classification and mapping utilities <wctype.h> (p: 457)
- K.3.3 Common definitions <stddef.h> (p: 585)
- K.3.9 Extended multibyte and wide character utilities <wchar.h> (p: 627-651)
- C99 standard (ISO/IEC 9899:1999):
- 7.17 Common definitions <stddef.h> (p: 254)
- 7.24 Extended multibyte and wide character utilities <wchar.h> (p: 348-392)
- 7.25 Wide character classification and mapping utilities <wctype.h> (p: 393-400)
- 7.26.12 Extended multibyte and wide character utilities <wchar.h> (p: 402)
- 7.26.13 Wide character classification and mapping utilities <wctype.h> (p: 402)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.1.5 Common definitions <stddef.h>
See also
C++ documentation for Null-terminated wide strings |
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