mbsinit - cppreference.com (original) (raw)

If ps is not a null pointer, the mbsinit function determines whether the pointed-to mbstate_t object describes the initial conversion state.

[edit] Notes

Although a zero-initialized mbstate_t always represents the initial conversion state, there may be other values of mbstate_t that also represent the initial conversion state.

[edit] Parameters

ps	-	pointer to the mbstate_t object to examine

[edit] Return value

0 if ps is not a null pointer and does not represent the initial conversion state, nonzero value otherwise.

[edit] Example

#include <locale.h> #include <string.h> #include <stdio.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 = u8"水"; // or u8"\u6c34" or "\xe6\xb0\xb4" static mbstate_t mb; // zero-initialize (void)mbrlen(&str[0], 1, &mb); if (!mbsinit(&mb)) { printf("After processing the first 1 byte of %s,\n" "the conversion state is not initial\n\n", str); } (void)mbrlen(&str[1], strlen(str), &mb); if (mbsinit(&mb)) { printf("After processing the remaining 2 bytes of %s,\n" "the conversion state is initial conversion state\n", str); } }

Output:

After processing the first 1 byte of 水, the conversion state is not initial After processing the remaining 2 bytes of 水, the conversion state is initial conversion state

[edit] References