gold/testsuite/leb128_unittest.cc

   1 // leb_unittest.cc -- test read_signed_LEB_128 and read_unsigned_LEB_128
   2
   3 // Copyright (C) 2012-2021 Free Software Foundation, Inc.
   4 // Written by Cary Coutant <ccoutant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 #include "gold.h"
  24
  25 #include <sys/types.h>
  26
  27 #include "int_encoding.h"
  28
  29 #include "test.h"
  30
  31 namespace gold_testsuite
  32 {
  33
  34 using namespace gold;
  35
  36 bool
  37 Leb128_test(Test_report*)
  38 {
  39   size_t len;
  40
  41   // Unsigned tests.
  42   static unsigned char u1[] = { 0 };            // 0
  43   static unsigned char u2[] = { 1 };            // 1
  44   static unsigned char u3[] = { 126 };          // 126
  45   static unsigned char u4[] = { 127 };          // 127
  46   static unsigned char u5[] = { 0x80+0, 1 };    // 128
  47   static unsigned char u6[] = { 0x80+1, 1 };    // 129
  48   static unsigned char u7[] = { 0x80+57, 100 }; // 12857
  49   static unsigned char u8[] = { 0x80, 0x80, 0x80, 0x80,
  50                                 0x80, 0x80, 0x80, 0x80,
  51                                 0x80, 1};       // 1ULL << 63
  52
  53   // Signed tests.
  54   static unsigned char s1[] = { 0 };            // 0
  55   static unsigned char s2[] = { 1 };            // 1
  56   static unsigned char s3[] = { 0x7e };         // -2
  57   static unsigned char s4[] = { 0x80+127, 0 };  // 127
  58   static unsigned char s5[] = { 0x80+1, 0x7f }; // -127
  59   static unsigned char s6[] = { 0x80+0, 1 };    // 128
  60   static unsigned char s7[] = { 0x80+0, 0x7f }; // -128
  61   static unsigned char s8[] = { 0x80+1, 1 };    // 129
  62   static unsigned char s9[] = { 0xff, 0x7e };   // -129
  63
  64   CHECK(read_unsigned_LEB_128(u1, &len) == 0 && len == sizeof(u1));
  65   CHECK(read_unsigned_LEB_128(u2, &len) == 1 && len == sizeof(u2));
  66   CHECK(read_unsigned_LEB_128(u3, &len) == 126 && len == sizeof(u3));
  67   CHECK(read_unsigned_LEB_128(u4, &len) == 127 && len == sizeof(u4));
  68   CHECK(read_unsigned_LEB_128(u5, &len) == 128 && len == sizeof(u5));
  69   CHECK(read_unsigned_LEB_128(u6, &len) == 129 && len == sizeof(u6));
  70   CHECK(read_unsigned_LEB_128(u7, &len) == 12857 && len == sizeof(u7));
  71   CHECK(read_unsigned_LEB_128(u8, &len) == (1ULL << 63) && len == sizeof(u8));
  72
  73   CHECK(read_signed_LEB_128(s1, &len) == 0 && len == sizeof(s1));
  74   CHECK(read_signed_LEB_128(s2, &len) == 1 && len == sizeof(s2));
  75   CHECK(read_signed_LEB_128(s3, &len) == -2 && len == sizeof(s3));
  76   CHECK(read_signed_LEB_128(s4, &len) == 127 && len == sizeof(s4));
  77   CHECK(read_signed_LEB_128(s5, &len) == -127 && len == sizeof(s5));
  78   CHECK(read_signed_LEB_128(s6, &len) == 128 && len == sizeof(s6));
  79   CHECK(read_signed_LEB_128(s7, &len) == -128 && len == sizeof(s7));
  80   CHECK(read_signed_LEB_128(s8, &len) == 129 && len == sizeof(s8));
  81   CHECK(read_signed_LEB_128(s9, &len) == -129 && len == sizeof(s9));
  82
  83   return true;
  84 }
  85
  86 Register_test leb128_register("LEB128", Leb128_test);
  87
  88 } // End namespace gold_testsuite.