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#include <stdio.h>
#include <string>
#include <emscripten.h>
#include <cassert>
#include <wchar.h>
typedef unsigned int utf32;
typedef unsigned short utf16;
// This code tests that Unicode std::wstrings can be marshalled between C++ and JS.
int main() {
std::wstring wstr = L"abc\u2603\u20AC\U0002007C123 --- abc\u2603\u20AC\U0002007C123"; // U+2603 is snowman, U+20AC is the Euro sign, U+2007C is a Chinese Han character that looks like three raindrops.
printf("sizeof(wchar_t): %d.\n", (int)sizeof(wchar_t));
if (sizeof(wchar_t) == 4) {
utf32 *memory = new utf32[wstr.length()+1];
EM_ASM_INT({
var str = Module.UTF32ToString($0);
Module.print(str);
Module.stringToUTF32(str, $1);
}, wstr.c_str(), memory);
// Compare memory to confirm that the string is intact after taking a route through JS side.
const utf32 *srcPtr = reinterpret_cast<const utf32 *>(wstr.c_str());
for(int i = 0;; ++i) {
assert(memory[i] == srcPtr[i]);
if (srcPtr[i] == 0)
break;
}
delete[] memory;
} else { // sizeof(wchar_t) == 2, and we're building with -fshort-wchar.
utf16 *memory = new utf16[2*wstr.length()+1];
EM_ASM_INT({
var str = Module.UTF16ToString($0);
Module.print(str);
Module.stringToUTF16(str, $1);
}, wstr.c_str(), memory);
// Compare memory to confirm that the string is intact after taking a route through JS side.
const utf16 *srcPtr = reinterpret_cast<const utf16 *>(wstr.c_str());
for(int i = 0;; ++i) {
assert(memory[i] == srcPtr[i]);
if (srcPtr[i] == 0)
break;
}
delete[] memory;
}
printf("OK.\n");
}
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