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// Copyright 2017 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 <stdarg.h>
#include <wchar.h>
#define MAX_CHARS_SMALL 256
#define MAX_CHARS_BIG 8096
void PrintWide ( const wchar_t * format, ... )
{
wchar_t buffer[MAX_CHARS_SMALL];
memset(buffer, 0, MAX_CHARS_SMALL);
va_list args;
va_start ( args, format );
wprintf(L"format starts with 0x%x\n", *(int*)format);
wprintf(L"fmt continues with 0x%x\n", *(((int*)format) + 1));
wprintf(L"fmt continues with 0x%x\n", *(((int*)format) + 2));
int r = vswprintf ( buffer, MAX_CHARS_SMALL-1, format, args );
wprintf(L"vswprintf told us %d\n", r);
wprintf(L"vswoutput st-rts with 0x%x\n", *(int*)buffer);
wprintf(L"vsw continues with 0x%x\n", *(((int*)buffer) + 1));
wprintf(L"vsw continues with 0x%x\n", *(((int*)buffer) + 2));
wprintf(buffer);
va_end ( args );
}
void PrintBigWide ( const wchar_t * format, ... )
{
wchar_t buffer[MAX_CHARS_BIG] = { 0 };
va_list args;
va_start ( args, format );
int ret = vswprintf ( buffer, MAX_CHARS_BIG-1, format, args );
va_end ( args );
wprintf(L"PrintBigWide wrote %d wchars:\n", ret);
wprintf(buffer);
}
int main ()
{
FILE *f = fopen("test.dat", "wb");
int num = fwprintf(f, L"hello %d", 5);
wprintf(L"fwprintf told us %d\n", num);
fclose(f);
f = fopen("test.dat", "rb");
fseek(f, 0, SEEK_END);
int size = ftell(f);
fclose(f);
wprintf(L"file size is %d\n", size);
wchar_t str[] = L"test string has %d wide characters.\n";
wprintf(L"str starts with 0x%x\n", *(int*)str);
wprintf(L"str continues with 0x%x\n", *(((int*)str) + 1));
wprintf(L"str continues with 0x%x\n", *(((int*)str) + 2));
PrintWide ( str, wcslen(str) );
PrintWide ( str, wcslen(str) );
PrintWide ( str, wcslen(str) );
wchar_t long_str[] = L"test string has %d wide characters.\n"
"Internally the variadic print functions use a 256 char buffer, so this is a string that's longer than 256 chars, "
"so in case this breaks we have a test case. As discovered in #9305 vswprintf had been broken for some time, "
"but was never picked up as the test strings were all shorter then 256 chars. So hopefully this long rambly string "
"will help guard against that bug being re-introduced.\n";
PrintBigWide ( long_str, wcslen(long_str) );
wprintf (L"Characters: %lc %lc \n", L'a', 65);
wprintf (L"Decimals: %d %ld\n", 1977, 650000L);
wprintf (L"Preceding with blanks: %10d \n", 1977);
wprintf (L"Preceding with zeros: %010d \n", 1977);
wprintf (L"Some different radixes: %d %x %o %#x %#o \n", 100, 100, 100, 100, 100);
wprintf (L"floats: %4.2f %+.0e %E \n", 3.1416, 3.1416, 3.1416);
wprintf (L"Width trick: %*d \n", 5, 10);
wprintf (L"%ls \n", L"A wide string");
wchar_t buffer [100];
memset(buffer, 0, sizeof(buffer));
int cx;
cx = swprintf(buffer, 100, L"The half of %d is %d", 80, 80/2);
wprintf(L"swprintf told us %d\n", cx);
for (int i = 0; i < 10; i++) wprintf(L"pre %d\n", ((int*)buffer)[i]);
swprintf (buffer+cx, 100-cx-1, L", and the half of that is %d.\n", 80/2/2);
for (int i = 0; i < 10; i++) wprintf(L"post %d\n", ((int*)buffer)[i]);
wprintf(buffer);
return 0;
}
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