74 строки
2.5 KiB
C++
74 строки
2.5 KiB
C++
#include <stdio.h>
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#include <string>
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#include <emscripten.h>
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#include <cassert>
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#include <wchar.h>
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typedef unsigned int utf32;
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typedef unsigned short utf16;
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// This code tests that Unicode std::wstrings can be marshalled between C++ and JS.
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int main() {
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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.
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printf("sizeof(wchar_t): %d.\n", (int)sizeof(wchar_t));
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if (sizeof(wchar_t) == 4) {
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utf32 *memory = new utf32[wstr.length()+1];
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EM_ASM_INT({
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var str = Module.UTF32ToString($0);
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Module.print(str);
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var numBytesWritten = Module.stringToUTF32(str, $1, $2);
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if (numBytesWritten != 23*4) throw 'stringToUTF32 wrote an invalid length ' + numBytesWritten;
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}, wstr.c_str(), memory, (wstr.length()+1)*sizeof(utf32));
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// Compare memory to confirm that the string is intact after taking a route through JS side.
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const utf32 *srcPtr = reinterpret_cast<const utf32 *>(wstr.c_str());
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for(int i = 0;; ++i) {
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assert(memory[i] == srcPtr[i]);
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if (srcPtr[i] == 0)
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break;
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}
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EM_ASM_INT({
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var str = Module.UTF32ToString($0);
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Module.print(str);
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var numBytesWritten = Module.stringToUTF32(str, $1, $2);
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if (numBytesWritten != 5*4) throw 'stringToUTF32 wrote an invalid length ' + numBytesWritten;
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}, wstr.c_str(), memory, 6*sizeof(utf32));
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assert(memory[5] == 0);
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delete[] memory;
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} else { // sizeof(wchar_t) == 2, and we're building with -fshort-wchar.
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utf16 *memory = new utf16[2*wstr.length()+1];
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EM_ASM_INT({
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var str = Module.UTF16ToString($0);
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Module.print(str);
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var numBytesWritten = Module.stringToUTF16(str, $1, $2);
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if (numBytesWritten != 25*2) throw 'stringToUTF16 wrote an invalid length ' + numBytesWritten;
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}, wstr.c_str(), memory, (2*wstr.length()+1)*sizeof(utf16));
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// Compare memory to confirm that the string is intact after taking a route through JS side.
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const utf16 *srcPtr = reinterpret_cast<const utf16 *>(wstr.c_str());
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for(int i = 0;; ++i) {
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assert(memory[i] == srcPtr[i]);
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if (srcPtr[i] == 0)
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break;
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}
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EM_ASM_INT({
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var str = Module.UTF16ToString($0);
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Module.print(str);
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var numBytesWritten = Module.stringToUTF16(str, $1, $2);
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if (numBytesWritten != 5*2) throw 'stringToUTF16 wrote an invalid length ' + numBytesWritten;
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}, wstr.c_str(), memory, 6*sizeof(utf16));
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assert(memory[5] == 0);
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delete[] memory;
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}
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printf("OK.\n");
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}
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