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8db0e1abee
Use a fast path for column width computation for ascii characters. Especially
relevant for llvm-objdump.
before:
% time ./bin/llvm-objdump -D -j .text /lib/libc.so.6 >/dev/null
./bin/llvm-objdump -D -j .text /lib/libc.so.6 > /dev/null 0.75s user 0.01s system 99% cpu 0.757 total
after:
% time ./bin/llvm-objdump -D -j .text /lib/libc.so.6 >/dev/null
./bin/llvm-objdump -D -j .text /lib/libc.so.6 > /dev/null 0.37s user 0.01s system 99% cpu 0.378 total
Differential Revision: https://reviews.llvm.org/D92180
108 lines
4.0 KiB
C++
108 lines
4.0 KiB
C++
//===- unittests/Support/UnicodeTest.cpp - Unicode.h tests ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Unicode.h"
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#include "llvm/Support/ConvertUTF.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace sys {
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namespace unicode {
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namespace {
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TEST(Unicode, columnWidthUTF8) {
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EXPECT_EQ(0, columnWidthUTF8(""));
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EXPECT_EQ(1, columnWidthUTF8(" "));
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EXPECT_EQ(1, columnWidthUTF8("a"));
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EXPECT_EQ(1, columnWidthUTF8("~"));
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EXPECT_EQ(6, columnWidthUTF8("abcdef"));
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EXPECT_EQ(-1, columnWidthUTF8("\x01"));
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EXPECT_EQ(-1, columnWidthUTF8("\t"));
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EXPECT_EQ(-1, columnWidthUTF8("aaaaaaaaaa\x01"));
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EXPECT_EQ(-1, columnWidthUTF8("\342\200\213")); // 200B ZERO WIDTH SPACE
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// 00AD SOFT HYPHEN is displayed on most terminals as a space or a dash. Some
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// text editors display it only when a line is broken at it, some use it as a
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// line-break hint, but don't display. We choose terminal-oriented
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// interpretation.
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EXPECT_EQ(1, columnWidthUTF8("\302\255"));
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EXPECT_EQ(0, columnWidthUTF8("\314\200")); // 0300 COMBINING GRAVE ACCENT
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EXPECT_EQ(1, columnWidthUTF8("\340\270\201")); // 0E01 THAI CHARACTER KO KAI
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EXPECT_EQ(2, columnWidthUTF8("\344\270\200")); // CJK UNIFIED IDEOGRAPH-4E00
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EXPECT_EQ(4, columnWidthUTF8("\344\270\200\344\270\200"));
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EXPECT_EQ(3, columnWidthUTF8("q\344\270\200"));
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EXPECT_EQ(3, columnWidthUTF8("\314\200\340\270\201\344\270\200"));
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// Invalid UTF-8 strings, columnWidthUTF8 should error out.
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EXPECT_EQ(-2, columnWidthUTF8("\344"));
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EXPECT_EQ(-2, columnWidthUTF8("\344\270"));
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EXPECT_EQ(-2, columnWidthUTF8("\344\270\033"));
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EXPECT_EQ(-2, columnWidthUTF8("\344\270\300"));
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EXPECT_EQ(-2, columnWidthUTF8("\377\366\355"));
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EXPECT_EQ(-2, columnWidthUTF8("qwer\344"));
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EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270"));
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EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270\033"));
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EXPECT_EQ(-2, columnWidthUTF8("qwer\344\270\300"));
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EXPECT_EQ(-2, columnWidthUTF8("qwer\377\366\355"));
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// UTF-8 sequences longer than 4 bytes correspond to unallocated Unicode
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// characters.
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EXPECT_EQ(-2, columnWidthUTF8("\370\200\200\200\200")); // U+200000
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EXPECT_EQ(-2, columnWidthUTF8("\374\200\200\200\200\200")); // U+4000000
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}
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TEST(Unicode, isPrintable) {
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EXPECT_FALSE(isPrintable(0)); // <control-0000>-<control-001F>
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EXPECT_FALSE(isPrintable(0x01));
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EXPECT_FALSE(isPrintable(0x1F));
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EXPECT_TRUE(isPrintable(' '));
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EXPECT_TRUE(isPrintable('A'));
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EXPECT_TRUE(isPrintable('~'));
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EXPECT_FALSE(isPrintable(0x7F)); // <control-007F>..<control-009F>
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EXPECT_FALSE(isPrintable(0x90));
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EXPECT_FALSE(isPrintable(0x9F));
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EXPECT_TRUE(isPrintable(0xAC));
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EXPECT_TRUE(isPrintable(0xAD)); // SOFT HYPHEN is displayed on most terminals
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// as either a space or a dash.
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EXPECT_TRUE(isPrintable(0xAE));
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EXPECT_TRUE(isPrintable(0x0377)); // GREEK SMALL LETTER PAMPHYLIAN DIGAMMA
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EXPECT_FALSE(isPrintable(0x0378)); // <reserved-0378>..<reserved-0379>
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EXPECT_FALSE(isPrintable(0x0600)); // ARABIC NUMBER SIGN
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EXPECT_FALSE(isPrintable(0x1FFFF)); // <reserved-1F774>..<noncharacter-1FFFF>
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EXPECT_TRUE(isPrintable(0x20000)); // CJK UNIFIED IDEOGRAPH-20000
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EXPECT_FALSE(isPrintable(0x10FFFF)); // noncharacter
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// test the validity of a fast path in columnWidthUTF8
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for (unsigned char c = 0; c < 128; ++c) {
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const UTF8 buf8[2] = {c, 0};
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const UTF8 *Target8 = &buf8[0];
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UTF32 buf32[1];
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UTF32 *Target32 = &buf32[0];
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auto status = ConvertUTF8toUTF32(&Target8, Target8 + 1, &Target32,
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Target32 + 1, strictConversion);
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EXPECT_TRUE(status == conversionOK);
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EXPECT_TRUE((columnWidthUTF8(reinterpret_cast<const char *>(buf8)) == 1) ==
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(bool)isPrintable(buf32[0]));
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}
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}
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} // namespace
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} // namespace unicode
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} // namespace sys
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} // namespace llvm
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