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/* demo_utf8towc() against libc mbrtowc()
*
* Copyright 2017 Rob Landley <rob@landley.net>
USE_DEMO_UTF8TOWC(NEWTOY(demo_utf8towc, 0, TOYFLAG_USR|TOYFLAG_BIN))
config DEMO_UTF8TOWC
bool "demo_utf8towc"
default n
help
usage: demo_utf8towc
Print differences between toybox's utf8 conversion routines vs libc du jour.
*/
#include "toys.h"
void demo_utf8towc_main(void)
{
mbstate_t mb;
int len1, len2;
unsigned u, h, wc2;
wchar_t wc1;
memset(&mb, 0, sizeof(mb));
for (u = 1; u<=0x10ffff; u++) {
char *str = (void *)&h;
wc1 = wc2 = 0;
len2 = 4;
h = htonl(u);
while (!*str) str++, len2--;
len1 = mbrtowc(&wc1, str, len2, &mb);
if (len1<0) memset(&mb, 0, sizeof(mb));
len2 = utf8towc(&wc2, str, len2);
if (len1 != len2 || wc1 != wc2)
printf("%x %d %x %d %x\n", u, len1, wc1, len2, wc2);
}
}
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