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// Copyright 2016 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <stdio.h>
#include <string.h>
#include <wchar.h>
#include <assert.h>
#include <emscripten.h>
#include <time.h>
EM_JS_DEPS(deps, "$UTF8ToString,emscripten_get_now");
double test(const char *str) {
double res = EM_ASM_DOUBLE({
var t0 = _emscripten_get_now();
var str = UTF8ToString($0);
var t1 = _emscripten_get_now();
// out('t: ' + (t1 - t0) + ', len(result): ' + str.length + ', result: ' + str.slice(0, 100));
return (t1-t0);
}, str);
return res;
}
char *utf8_corpus = 0;
long utf8_corpus_length = 0;
char *randomString(int len) {
if (!utf8_corpus) {
FILE *handle = fopen("utf8_corpus.txt", "rb");
fseek(handle, 0, SEEK_END);
utf8_corpus_length = ftell(handle);
assert(utf8_corpus_length > 0);
utf8_corpus = malloc(utf8_corpus_length+1);
fseek(handle, 0, SEEK_SET);
fread(utf8_corpus, 1, utf8_corpus_length, handle);
fclose(handle);
utf8_corpus[utf8_corpus_length] = '\0';
}
int startIdx = rand() % (utf8_corpus_length - len);
while (((unsigned char)utf8_corpus[startIdx] & 0xC0) == 0x80) {
++startIdx;
if (startIdx + len > utf8_corpus_length) len = utf8_corpus_length - startIdx;
}
assert(len > 0);
char *s = malloc(len+1);
memcpy(s, utf8_corpus + startIdx, len);
s[len] = '\0';
while (len > 0 && ((unsigned char)s[len-1] & 0xC0) == 0x80) { s[--len] = '\0'; }
while (len > 0 && ((unsigned char)s[len-1] & 0xC0) == 0xC0) { s[--len] = '\0'; }
assert(len >= 0);
return s;
}
int main() {
time_t seed = time(NULL);
printf("Random seed: %lld\n", seed);
srand(seed);
double t = 0;
double t2 = emscripten_get_now();
for (int i = 0; i < 100000; ++i) {
// Create strings of lengths 1-32, because the internals of text decoding
// have a cutoff of 16 for when to use TextDecoder, and we wish to test both
// (see UTF8ArrayToString).
char *str = randomString((i % 32) + 1);
t += test(str);
free(str);
}
double t3 = emscripten_get_now();
printf("OK. Time: %f (%f).\n", t, t3-t2);
return 0;
}
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