Add test case demonstrating a Win10 15048 ReadConsoleOutput bug
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Ryan Prichard
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47e7e005e8
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201
misc/winbug-15048.cc
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201
misc/winbug-15048.cc
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/*
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Test program demonstrating a problem in Windows 15048's ReadConsoleOutput API.
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To compile:
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cl /nologo /EHsc winbug-15048.cc shell32.lib
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Example of regressed input:
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Case 1:
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> chcp 932
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> winbug-15048 -face-gothic 3044
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Correct output:
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1**34 (nb: U+3044 replaced with '**' to avoid MSVC encoding warning)
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5678
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ReadConsoleOutputW (both rows, 3 cols)
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row 0: U+0031(0007) U+3044(0107) U+3044(0207) U+0033(0007)
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row 1: U+0035(0007) U+0036(0007) U+0037(0007) U+0038(0007)
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ReadConsoleOutputW (both rows, 4 cols)
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row 0: U+0031(0007) U+3044(0107) U+3044(0207) U+0033(0007) U+0034(0007)
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row 1: U+0035(0007) U+0036(0007) U+0037(0007) U+0038(0007) U+0020(0007)
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ReadConsoleOutputW (second row)
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row 1: U+0035(0007) U+0036(0007) U+0037(0007) U+0038(0007) U+0020(0007)
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...
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Win10 15048 bad output:
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1**34
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5678
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ReadConsoleOutputW (both rows, 3 cols)
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row 0: U+0031(0007) U+3044(0007) U+0033(0007) U+0035(0007)
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row 1: U+0036(0007) U+0037(0007) U+0038(0007) U+0000(0000)
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ReadConsoleOutputW (both rows, 4 cols)
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row 0: U+0031(0007) U+3044(0007) U+0033(0007) U+0034(0007) U+0035(0007)
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row 1: U+0036(0007) U+0037(0007) U+0038(0007) U+0020(0007) U+0000(0000)
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ReadConsoleOutputW (second row)
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row 1: U+0035(0007) U+0036(0007) U+0037(0007) U+0038(0007) U+0020(0007)
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...
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The U+3044 character (HIRAGANA LETTER I) occupies two columns, but it only
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fills one record in the ReadConsoleOutput output buffer, which has the
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effect of shifting the first cell of the second row into the last cell of
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the first row. Ordinarily, the first and second cells would also have the
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COMMON_LVB_LEADING_BYTE and COMMON_LVB_TRAILING_BYTE attributes set, which
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allows winpty to detect the double-column character.
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Case 2:
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> chcp 437
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> winbug-15048 -face "Lucida Console" -h 4 221A
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The same issue happens with U+221A (SQUARE ROOT), but only in certain
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fonts. The console seems to think this character occupies two columns
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if the font is sufficiently small. The Windows console properties dialog
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doesn't allow fonts below 5 pt, but winpty tries to use 2pt and 4pt Lucida
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Console to allow very large console windows.
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Case 3:
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> chcp 437
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> winbug-15048 -face "Lucida Console" -h 12 FF12
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The console selection system thinks U+FF12 (FULLWIDTH DIGIT TWO) occupies
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two columns, which happens to be correct, but it's displayed as a single
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column unrecognized character. It otherwise behaves the same as the other
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cases.
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*/
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#include <windows.h>
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#include <assert.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <string>
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#define COUNT_OF(array) (sizeof(array) / sizeof((array)[0]))
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// See https://en.wikipedia.org/wiki/List_of_CJK_fonts
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const wchar_t kMSGothic[] = { 0xff2d, 0xff33, 0x0020, 0x30b4, 0x30b7, 0x30c3, 0x30af, 0 }; // Japanese
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const wchar_t kNSimSun[] = { 0x65b0, 0x5b8b, 0x4f53, 0 }; // Simplified Chinese
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const wchar_t kMingLight[] = { 0x7d30, 0x660e, 0x9ad4, 0 }; // Traditional Chinese
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const wchar_t kGulimChe[] = { 0xad74, 0xb9bc, 0xccb4, 0 }; // Korean
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static void set_font(const wchar_t *name, int size) {
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const HANDLE conout = GetStdHandle(STD_OUTPUT_HANDLE);
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CONSOLE_FONT_INFOEX fontex {};
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fontex.cbSize = sizeof(fontex);
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fontex.dwFontSize.Y = size;
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fontex.FontWeight = 400;
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fontex.FontFamily = 0x36;
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wcsncpy(fontex.FaceName, name, COUNT_OF(fontex.FaceName));
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assert(SetCurrentConsoleFontEx(conout, FALSE, &fontex));
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}
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static void usage(const wchar_t *prog) {
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printf("Usage: %ls [options]\n", prog);
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printf(" -h HEIGHT\n");
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printf(" -face FACENAME\n");
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printf(" -face-{gothic|simsun|minglight|gulimche) [JP,CN-sim,CN-tra,KR]\n");
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printf(" hhhh -- print U+hhhh\n");
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exit(1);
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}
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static void dump_region(SMALL_RECT region, const char *name) {
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const HANDLE conout = GetStdHandle(STD_OUTPUT_HANDLE);
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CHAR_INFO buf[1000];
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memset(buf, 0xcc, sizeof(buf));
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const int w = region.Right - region.Left + 1;
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const int h = region.Bottom - region.Top + 1;
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assert(ReadConsoleOutputW(
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conout, buf, { (short)w, (short)h }, { 0, 0 },
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®ion));
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printf("\n");
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printf("ReadConsoleOutputW (%s)\n", name);
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for (int y = 0; y < h; ++y) {
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printf("row %d: ", region.Top + y);
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for (int i = 0; i < region.Left * 13; ++i) {
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printf(" ");
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}
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for (int x = 0; x < w; ++x) {
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const int i = y * w + x;
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printf("U+%04x(%04x) ", buf[i].Char.UnicodeChar, buf[i].Attributes);
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}
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printf("\n");
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}
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}
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int main() {
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wchar_t *cmdline = GetCommandLineW();
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int argc = 0;
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wchar_t **argv = CommandLineToArgvW(cmdline, &argc);
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const wchar_t *font_name = L"Lucida Console";
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int font_height = 8;
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int test_ch = 0xff12; // U+FF12 FULLWIDTH DIGIT TWO
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for (int i = 1; i < argc; ++i) {
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const std::wstring arg = argv[i];
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const std::wstring next = i + 1 < argc ? argv[i + 1] : L"";
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if (arg == L"-face" && i + 1 < argc) {
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font_name = argv[i + 1];
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i++;
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} else if (arg == L"-face-gothic") {
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font_name = kMSGothic;
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} else if (arg == L"-face-simsun") {
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font_name = kNSimSun;
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} else if (arg == L"-face-minglight") {
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font_name = kMingLight;
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} else if (arg == L"-face-gulimche") {
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font_name = kGulimChe;
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} else if (arg == L"-h" && i + 1 < argc) {
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font_height = _wtoi(next.c_str());
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i++;
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} else if (arg.c_str()[0] != '-') {
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test_ch = wcstol(arg.c_str(), NULL, 16);
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} else {
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printf("Unrecognized argument: %ls\n", arg.c_str());
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usage(argv[0]);
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}
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}
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const HANDLE conout = GetStdHandle(STD_OUTPUT_HANDLE);
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set_font(font_name, font_height);
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system("cls");
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DWORD actual = 0;
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wchar_t output[] = L"1234\n5678\n";
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output[1] = test_ch;
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WriteConsoleW(conout, output, 10, &actual, nullptr);
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dump_region({ 0, 0, 3, 1 }, "both rows, 3 cols");
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dump_region({ 0, 0, 4, 1 }, "both rows, 4 cols");
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dump_region({ 0, 1, 4, 1 }, "second row");
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dump_region({ 0, 0, 4, 0 }, "first row");
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dump_region({ 1, 0, 4, 0 }, "first row, skip 1");
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dump_region({ 2, 0, 4, 0 }, "first row, skip 2");
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dump_region({ 3, 0, 4, 0 }, "first row, skip 3");
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set_font(font_name, 14);
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return 0;
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}
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