From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/string%2Fmultibyte%2Fmbrtoc16.html | 76 ---------------------------- 1 file changed, 76 deletions(-) delete mode 100644 devdocs/c/string%2Fmultibyte%2Fmbrtoc16.html (limited to 'devdocs/c/string%2Fmultibyte%2Fmbrtoc16.html') diff --git a/devdocs/c/string%2Fmultibyte%2Fmbrtoc16.html b/devdocs/c/string%2Fmultibyte%2Fmbrtoc16.html deleted file mode 100644 index df3061d9..00000000 --- a/devdocs/c/string%2Fmultibyte%2Fmbrtoc16.html +++ /dev/null @@ -1,76 +0,0 @@ -

mbrtoc16

Defined in header <uchar.h> 
size_t mbrtoc16( char16_t* restrict pc16, const char* restrict s,
-                 size_t n, mbstate_t* restrict ps );
-		 (since C11)

Converts a single code point from its narrow multibyte character representation to its variable-length 16-bit wide character representation (typically, UTF-16).

-

If s is not a null pointer, inspects at most n bytes of the multibyte character string, beginning with the byte pointed to by s to determine the number of bytes necessary to complete the next multibyte character (including any shift sequences, and taking into account the current multibyte conversion state *ps). If the function determines that the next multibyte character in s is complete and valid, converts it to the corresponding 16-bit wide character and stores it in *pc16 (if pc16 is not null).

-

If the multibyte character in *s corresponds to a multi-char16_t sequence (e.g. a surrogate pair in UTF-16), then after the first call to this function, *ps is updated in such a way that the next call to mbrtoc16 will write out the additional char16_t, without considering *s.

-

If s is a null pointer, the values of n and pc16 are ignored and the call is equivalent to mbrtoc16(NULL, "", 1, ps).

-

If the wide character produced is the null character, the conversion state *ps represents the initial shift state.

-

If the macro __STDC_UTF_16__ is defined, the 16-bit encoding used by this function is UTF-16; otherwise, it is implementation-defined. The macro is always defined and the encoding is always UTF-16.(since C23) In any case, the multibyte character encoding used by this function is specified by the currently active C locale.

-

Parameters

- - - - -
pc16 - pointer to the location where the resulting 16-bit wide character will be written
s - pointer to the multibyte character string used as input
n - limit on the number of bytes in s that can be examined
ps - pointer to the conversion state object used when interpreting the multibyte string

Return value

The first of the following that applies:

-

Example

#include <locale.h>
-#include <stdio.h>
-#include <uchar.h>
- 
-mbstate_t state;
- 
-int main(void)
-{
-    setlocale(LC_ALL, "en_US.utf8");
-    const char in[] = u8"zß水🍌"; // or "z\u00df\u6c34\U0001F34C"
-    const size_t in_sz = sizeof in / sizeof *in;
- 
-    printf("Processing %zu UTF-8 code units: [ ", in_sz);
-    for (size_t n = 0; n < in_sz; ++n)
-        printf("%#x ", (unsigned char)in[n]);
-    puts("]");
- 
-    char16_t out[in_sz];
-    const char *p_in = in, *end = in + in_sz;
-    char16_t *p_out = out;
-    for (size_t rc; (rc = mbrtoc16(p_out, p_in, end - p_in, &state));)
-    {
-        if (rc == (size_t)-1)     // invalid input
-            break;
-        else if(rc == (size_t)-2) // truncated input
-            break;
-        else if(rc == (size_t)-3) // UTF-16 high surrogate
-            p_out += 1;
-        else
-        {
-            p_in += rc;
-            p_out += 1;
-        };
-    }
- 
-    const size_t out_sz = p_out - out + 1;
-    printf("into %zu UTF-16 code units: [ ", out_sz);
-    for (size_t x = 0; x < out_sz; ++x)
-        printf("%#x ", out[x]);
-    puts("]");
-}

Output:

-
Processing 11 UTF-8 code units: [ 0x7a 0xc3 0x9f 0xe6 0xb0 0xb4 0xf0 0x9f 0x8d 0x8c 0 ]
-into 6 UTF-16 code units: [ 0x7a 0xdf 0x6c34 0xd83c 0xdf4c 0 ]

References

See also

- -
-
(C11)
 converts a 16-bit wide character to narrow multibyte string
(function)
C++ documentation for mbrtoc16
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/string/multibyte/mbrtoc16 -

-
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