Determines the size, in bytes, of the representation of a multibyte character.
This function is equivalent to the call mbrtowc(NULL, s, n, ps ? ps : &internal) for some hidden object internal of type mbstate_t, except that the expression ps is evaluated only once.
[edit] Parameters s - pointer to an element of a multibyte character string n - limit on the number of bytes in s that can be examined ps - pointer to the variable holding the conversion state [edit] Return valueThe first of the following that applies:
#include <locale.h>
#include <stdio.h>
#include <string.h>
#include <wchar.h>
int main(void)
{
// allow mbrlen() to work with UTF-8 multibyte encoding
setlocale(LC_ALL, "en_US.utf8");
// UTF-8 narrow multibyte encoding
const char* str = "æ°´";
size_t sz = strlen(str);
mbstate_t mb;
memset(&mb, 0, sizeof mb);
int len1 = mbrlen(str, 1, &mb);
if (len1 == -2)
printf("The first 1 byte of %s is an incomplete multibyte char"
" (mbrlen returns -2)\n", str);
int len2 = mbrlen(str + 1, sz - 1, &mb);
printf("The remaining %zu bytes of %s hold %d bytes of the multibyte"
" character\n", sz - 1, str, len2);
printf("Attempting to call mbrlen() in the middle of %s while in initial"
" shift state returns %zd\n", str, mbrlen(str + 1, sz - 1, &mb));
}
Output:
The first 1 byte of æ°´ is an incomplete multibyte char (mbrlen returns -2) The remaining 2 bytes of æ°´ hold 2 bytes of the multibyte character Attempting to call mbrlen() in the middle of æ°´ while in initial shift state returns -1[edit] References
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4