1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862
|
//===-- CommandLine.cpp - Command line parser implementation --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class implements a command line argument processor that is useful when
// creating a tool. It provides a simple, minimalistic interface that is easily
// extensible and supports nonlocal (library) command line options.
//
// Note that rather than trying to figure out what this code does, you could try
// reading the library documentation located in docs/CommandLine.html
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/CommandLine.h"
#include "llvm-c/Support.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Config/config.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
#include <map>
using namespace llvm;
using namespace cl;
#define DEBUG_TYPE "commandline"
//===----------------------------------------------------------------------===//
// Template instantiations and anchors.
//
namespace llvm {
namespace cl {
template class basic_parser<bool>;
template class basic_parser<boolOrDefault>;
template class basic_parser<int>;
template class basic_parser<unsigned>;
template class basic_parser<unsigned long long>;
template class basic_parser<double>;
template class basic_parser<float>;
template class basic_parser<std::string>;
template class basic_parser<char>;
template class opt<unsigned>;
template class opt<int>;
template class opt<std::string>;
template class opt<char>;
template class opt<bool>;
}
} // end namespace llvm::cl
// Pin the vtables to this file.
void GenericOptionValue::anchor() {}
void OptionValue<boolOrDefault>::anchor() {}
void OptionValue<std::string>::anchor() {}
void Option::anchor() {}
void basic_parser_impl::anchor() {}
void parser<bool>::anchor() {}
void parser<boolOrDefault>::anchor() {}
void parser<int>::anchor() {}
void parser<unsigned>::anchor() {}
void parser<unsigned long long>::anchor() {}
void parser<double>::anchor() {}
void parser<float>::anchor() {}
void parser<std::string>::anchor() {}
void parser<char>::anchor() {}
//===----------------------------------------------------------------------===//
namespace {
class CommandLineParser {
public:
// Globals for name and overview of program. Program name is not a string to
// avoid static ctor/dtor issues.
std::string ProgramName;
const char *ProgramOverview;
// This collects additional help to be printed.
std::vector<const char *> MoreHelp;
SmallVector<Option *, 4> PositionalOpts;
SmallVector<Option *, 4> SinkOpts;
StringMap<Option *> OptionsMap;
Option *ConsumeAfterOpt; // The ConsumeAfter option if it exists.
// This collects the different option categories that have been registered.
SmallPtrSet<OptionCategory *, 16> RegisteredOptionCategories;
CommandLineParser() : ProgramOverview(nullptr), ConsumeAfterOpt(nullptr) {}
void ParseCommandLineOptions(int argc, const char *const *argv,
const char *Overview);
void addLiteralOption(Option &Opt, const char *Name) {
if (!Opt.hasArgStr()) {
if (!OptionsMap.insert(std::make_pair(Name, &Opt)).second) {
errs() << ProgramName << ": CommandLine Error: Option '" << Name
<< "' registered more than once!\n";
report_fatal_error("inconsistency in registered CommandLine options");
}
}
}
void addOption(Option *O) {
bool HadErrors = false;
if (O->ArgStr[0]) {
// Add argument to the argument map!
if (!OptionsMap.insert(std::make_pair(O->ArgStr, O)).second) {
errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr
<< "' registered more than once!\n";
HadErrors = true;
}
}
// Remember information about positional options.
if (O->getFormattingFlag() == cl::Positional)
PositionalOpts.push_back(O);
else if (O->getMiscFlags() & cl::Sink) // Remember sink options
SinkOpts.push_back(O);
else if (O->getNumOccurrencesFlag() == cl::ConsumeAfter) {
if (ConsumeAfterOpt) {
O->error("Cannot specify more than one option with cl::ConsumeAfter!");
HadErrors = true;
}
ConsumeAfterOpt = O;
}
// Fail hard if there were errors. These are strictly unrecoverable and
// indicate serious issues such as conflicting option names or an
// incorrectly
// linked LLVM distribution.
if (HadErrors)
report_fatal_error("inconsistency in registered CommandLine options");
}
void removeOption(Option *O) {
SmallVector<const char *, 16> OptionNames;
O->getExtraOptionNames(OptionNames);
if (O->ArgStr[0])
OptionNames.push_back(O->ArgStr);
for (auto Name : OptionNames)
OptionsMap.erase(StringRef(Name));
if (O->getFormattingFlag() == cl::Positional)
for (auto Opt = PositionalOpts.begin(); Opt != PositionalOpts.end();
++Opt) {
if (*Opt == O) {
PositionalOpts.erase(Opt);
break;
}
}
else if (O->getMiscFlags() & cl::Sink)
for (auto Opt = SinkOpts.begin(); Opt != SinkOpts.end(); ++Opt) {
if (*Opt == O) {
SinkOpts.erase(Opt);
break;
}
}
else if (O == ConsumeAfterOpt)
ConsumeAfterOpt = nullptr;
}
bool hasOptions() {
return (!OptionsMap.empty() || !PositionalOpts.empty() ||
nullptr != ConsumeAfterOpt);
}
void updateArgStr(Option *O, const char *NewName) {
if (!OptionsMap.insert(std::make_pair(NewName, O)).second) {
errs() << ProgramName << ": CommandLine Error: Option '" << O->ArgStr
<< "' registered more than once!\n";
report_fatal_error("inconsistency in registered CommandLine options");
}
OptionsMap.erase(StringRef(O->ArgStr));
}
void printOptionValues();
void registerCategory(OptionCategory *cat) {
assert(std::count_if(RegisteredOptionCategories.begin(),
RegisteredOptionCategories.end(),
[cat](const OptionCategory *Category) {
return cat->getName() == Category->getName();
}) == 0 &&
"Duplicate option categories");
RegisteredOptionCategories.insert(cat);
}
private:
Option *LookupOption(StringRef &Arg, StringRef &Value);
};
} // namespace
static ManagedStatic<CommandLineParser> GlobalParser;
void cl::AddLiteralOption(Option &O, const char *Name) {
GlobalParser->addLiteralOption(O, Name);
}
extrahelp::extrahelp(const char *Help) : morehelp(Help) {
GlobalParser->MoreHelp.push_back(Help);
}
void Option::addArgument() {
GlobalParser->addOption(this);
FullyInitialized = true;
}
void Option::removeArgument() { GlobalParser->removeOption(this); }
void Option::setArgStr(const char *S) {
if (FullyInitialized)
GlobalParser->updateArgStr(this, S);
ArgStr = S;
}
// Initialise the general option category.
OptionCategory llvm::cl::GeneralCategory("General options");
void OptionCategory::registerCategory() {
GlobalParser->registerCategory(this);
}
//===----------------------------------------------------------------------===//
// Basic, shared command line option processing machinery.
//
/// LookupOption - Lookup the option specified by the specified option on the
/// command line. If there is a value specified (after an equal sign) return
/// that as well. This assumes that leading dashes have already been stripped.
Option *CommandLineParser::LookupOption(StringRef &Arg, StringRef &Value) {
// Reject all dashes.
if (Arg.empty())
return nullptr;
size_t EqualPos = Arg.find('=');
// If we have an equals sign, remember the value.
if (EqualPos == StringRef::npos) {
// Look up the option.
StringMap<Option *>::const_iterator I = OptionsMap.find(Arg);
return I != OptionsMap.end() ? I->second : nullptr;
}
// If the argument before the = is a valid option name, we match. If not,
// return Arg unmolested.
StringMap<Option *>::const_iterator I =
OptionsMap.find(Arg.substr(0, EqualPos));
if (I == OptionsMap.end())
return nullptr;
Value = Arg.substr(EqualPos + 1);
Arg = Arg.substr(0, EqualPos);
return I->second;
}
/// LookupNearestOption - Lookup the closest match to the option specified by
/// the specified option on the command line. If there is a value specified
/// (after an equal sign) return that as well. This assumes that leading dashes
/// have already been stripped.
static Option *LookupNearestOption(StringRef Arg,
const StringMap<Option *> &OptionsMap,
std::string &NearestString) {
// Reject all dashes.
if (Arg.empty())
return nullptr;
// Split on any equal sign.
std::pair<StringRef, StringRef> SplitArg = Arg.split('=');
StringRef &LHS = SplitArg.first; // LHS == Arg when no '=' is present.
StringRef &RHS = SplitArg.second;
// Find the closest match.
Option *Best = nullptr;
unsigned BestDistance = 0;
for (StringMap<Option *>::const_iterator it = OptionsMap.begin(),
ie = OptionsMap.end();
it != ie; ++it) {
Option *O = it->second;
SmallVector<const char *, 16> OptionNames;
O->getExtraOptionNames(OptionNames);
if (O->ArgStr[0])
OptionNames.push_back(O->ArgStr);
bool PermitValue = O->getValueExpectedFlag() != cl::ValueDisallowed;
StringRef Flag = PermitValue ? LHS : Arg;
for (size_t i = 0, e = OptionNames.size(); i != e; ++i) {
StringRef Name = OptionNames[i];
unsigned Distance = StringRef(Name).edit_distance(
Flag, /*AllowReplacements=*/true, /*MaxEditDistance=*/BestDistance);
if (!Best || Distance < BestDistance) {
Best = O;
BestDistance = Distance;
if (RHS.empty() || !PermitValue)
NearestString = OptionNames[i];
else
NearestString = (Twine(OptionNames[i]) + "=" + RHS).str();
}
}
}
return Best;
}
/// CommaSeparateAndAddOccurrence - A wrapper around Handler->addOccurrence()
/// that does special handling of cl::CommaSeparated options.
static bool CommaSeparateAndAddOccurrence(Option *Handler, unsigned pos,
StringRef ArgName, StringRef Value,
bool MultiArg = false) {
// Check to see if this option accepts a comma separated list of values. If
// it does, we have to split up the value into multiple values.
if (Handler->getMiscFlags() & CommaSeparated) {
StringRef Val(Value);
StringRef::size_type Pos = Val.find(',');
while (Pos != StringRef::npos) {
// Process the portion before the comma.
if (Handler->addOccurrence(pos, ArgName, Val.substr(0, Pos), MultiArg))
return true;
// Erase the portion before the comma, AND the comma.
Val = Val.substr(Pos + 1);
Value.substr(Pos + 1); // Increment the original value pointer as well.
// Check for another comma.
Pos = Val.find(',');
}
Value = Val;
}
if (Handler->addOccurrence(pos, ArgName, Value, MultiArg))
return true;
return false;
}
/// ProvideOption - For Value, this differentiates between an empty value ("")
/// and a null value (StringRef()). The later is accepted for arguments that
/// don't allow a value (-foo) the former is rejected (-foo=).
static inline bool ProvideOption(Option *Handler, StringRef ArgName,
StringRef Value, int argc,
const char *const *argv, int &i) {
// Is this a multi-argument option?
unsigned NumAdditionalVals = Handler->getNumAdditionalVals();
// Enforce value requirements
switch (Handler->getValueExpectedFlag()) {
case ValueRequired:
if (!Value.data()) { // No value specified?
if (i + 1 >= argc)
return Handler->error("requires a value!");
// Steal the next argument, like for '-o filename'
assert(argv && "null check");
Value = argv[++i];
}
break;
case ValueDisallowed:
if (NumAdditionalVals > 0)
return Handler->error("multi-valued option specified"
" with ValueDisallowed modifier!");
if (Value.data())
return Handler->error("does not allow a value! '" + Twine(Value) +
"' specified.");
break;
case ValueOptional:
break;
}
// If this isn't a multi-arg option, just run the handler.
if (NumAdditionalVals == 0)
return CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value);
// If it is, run the handle several times.
bool MultiArg = false;
if (Value.data()) {
if (CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value, MultiArg))
return true;
--NumAdditionalVals;
MultiArg = true;
}
while (NumAdditionalVals > 0) {
if (i + 1 >= argc)
return Handler->error("not enough values!");
assert(argv && "null check");
Value = argv[++i];
if (CommaSeparateAndAddOccurrence(Handler, i, ArgName, Value, MultiArg))
return true;
MultiArg = true;
--NumAdditionalVals;
}
return false;
}
static bool ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
int Dummy = i;
return ProvideOption(Handler, Handler->ArgStr, Arg, 0, nullptr, Dummy);
}
// Option predicates...
static inline bool isGrouping(const Option *O) {
return O->getFormattingFlag() == cl::Grouping;
}
static inline bool isPrefixedOrGrouping(const Option *O) {
return isGrouping(O) || O->getFormattingFlag() == cl::Prefix;
}
// getOptionPred - Check to see if there are any options that satisfy the
// specified predicate with names that are the prefixes in Name. This is
// checked by progressively stripping characters off of the name, checking to
// see if there options that satisfy the predicate. If we find one, return it,
// otherwise return null.
//
static Option *getOptionPred(StringRef Name, size_t &Length,
bool (*Pred)(const Option *),
const StringMap<Option *> &OptionsMap) {
StringMap<Option *>::const_iterator OMI = OptionsMap.find(Name);
// Loop while we haven't found an option and Name still has at least two
// characters in it (so that the next iteration will not be the empty
// string.
while (OMI == OptionsMap.end() && Name.size() > 1) {
Name = Name.substr(0, Name.size() - 1); // Chop off the last character.
OMI = OptionsMap.find(Name);
}
if (OMI != OptionsMap.end() && Pred(OMI->second)) {
Length = Name.size();
return OMI->second; // Found one!
}
return nullptr; // No option found!
}
/// HandlePrefixedOrGroupedOption - The specified argument string (which started
/// with at least one '-') does not fully match an available option. Check to
/// see if this is a prefix or grouped option. If so, split arg into output an
/// Arg/Value pair and return the Option to parse it with.
static Option *
HandlePrefixedOrGroupedOption(StringRef &Arg, StringRef &Value,
bool &ErrorParsing,
const StringMap<Option *> &OptionsMap) {
if (Arg.size() == 1)
return nullptr;
// Do the lookup!
size_t Length = 0;
Option *PGOpt = getOptionPred(Arg, Length, isPrefixedOrGrouping, OptionsMap);
if (!PGOpt)
return nullptr;
// If the option is a prefixed option, then the value is simply the
// rest of the name... so fall through to later processing, by
// setting up the argument name flags and value fields.
if (PGOpt->getFormattingFlag() == cl::Prefix) {
Value = Arg.substr(Length);
Arg = Arg.substr(0, Length);
assert(OptionsMap.count(Arg) && OptionsMap.find(Arg)->second == PGOpt);
return PGOpt;
}
// This must be a grouped option... handle them now. Grouping options can't
// have values.
assert(isGrouping(PGOpt) && "Broken getOptionPred!");
do {
// Move current arg name out of Arg into OneArgName.
StringRef OneArgName = Arg.substr(0, Length);
Arg = Arg.substr(Length);
// Because ValueRequired is an invalid flag for grouped arguments,
// we don't need to pass argc/argv in.
assert(PGOpt->getValueExpectedFlag() != cl::ValueRequired &&
"Option can not be cl::Grouping AND cl::ValueRequired!");
int Dummy = 0;
ErrorParsing |=
ProvideOption(PGOpt, OneArgName, StringRef(), 0, nullptr, Dummy);
// Get the next grouping option.
PGOpt = getOptionPred(Arg, Length, isGrouping, OptionsMap);
} while (PGOpt && Length != Arg.size());
// Return the last option with Arg cut down to just the last one.
return PGOpt;
}
static bool RequiresValue(const Option *O) {
return O->getNumOccurrencesFlag() == cl::Required ||
O->getNumOccurrencesFlag() == cl::OneOrMore;
}
static bool EatsUnboundedNumberOfValues(const Option *O) {
return O->getNumOccurrencesFlag() == cl::ZeroOrMore ||
O->getNumOccurrencesFlag() == cl::OneOrMore;
}
static bool isWhitespace(char C) { return strchr(" \t\n\r\f\v", C); }
static bool isQuote(char C) { return C == '\"' || C == '\''; }
static bool isGNUSpecial(char C) { return strchr("\\\"\' ", C); }
void cl::TokenizeGNUCommandLine(StringRef Src, StringSaver &Saver,
SmallVectorImpl<const char *> &NewArgv,
bool MarkEOLs) {
SmallString<128> Token;
for (size_t I = 0, E = Src.size(); I != E; ++I) {
// Consume runs of whitespace.
if (Token.empty()) {
while (I != E && isWhitespace(Src[I])) {
// Mark the end of lines in response files
if (MarkEOLs && Src[I] == '\n')
NewArgv.push_back(nullptr);
++I;
}
if (I == E)
break;
}
// Backslashes can escape backslashes, spaces, and other quotes. Otherwise
// they are literal. This makes it much easier to read Windows file paths.
if (I + 1 < E && Src[I] == '\\' && isGNUSpecial(Src[I + 1])) {
++I; // Skip the escape.
Token.push_back(Src[I]);
continue;
}
// Consume a quoted string.
if (isQuote(Src[I])) {
char Quote = Src[I++];
while (I != E && Src[I] != Quote) {
// Backslashes are literal, unless they escape a special character.
if (Src[I] == '\\' && I + 1 != E && isGNUSpecial(Src[I + 1]))
++I;
Token.push_back(Src[I]);
++I;
}
if (I == E)
break;
continue;
}
// End the token if this is whitespace.
if (isWhitespace(Src[I])) {
if (!Token.empty())
NewArgv.push_back(Saver.save(Token.c_str()));
Token.clear();
continue;
}
// This is a normal character. Append it.
Token.push_back(Src[I]);
}
// Append the last token after hitting EOF with no whitespace.
if (!Token.empty())
NewArgv.push_back(Saver.save(Token.c_str()));
// Mark the end of response files
if (MarkEOLs)
NewArgv.push_back(nullptr);
}
/// Backslashes are interpreted in a rather complicated way in the Windows-style
/// command line, because backslashes are used both to separate path and to
/// escape double quote. This method consumes runs of backslashes as well as the
/// following double quote if it's escaped.
///
/// * If an even number of backslashes is followed by a double quote, one
/// backslash is output for every pair of backslashes, and the last double
/// quote remains unconsumed. The double quote will later be interpreted as
/// the start or end of a quoted string in the main loop outside of this
/// function.
///
/// * If an odd number of backslashes is followed by a double quote, one
/// backslash is output for every pair of backslashes, and a double quote is
/// output for the last pair of backslash-double quote. The double quote is
/// consumed in this case.
///
/// * Otherwise, backslashes are interpreted literally.
static size_t parseBackslash(StringRef Src, size_t I, SmallString<128> &Token) {
size_t E = Src.size();
int BackslashCount = 0;
// Skip the backslashes.
do {
++I;
++BackslashCount;
} while (I != E && Src[I] == '\\');
bool FollowedByDoubleQuote = (I != E && Src[I] == '"');
if (FollowedByDoubleQuote) {
Token.append(BackslashCount / 2, '\\');
if (BackslashCount % 2 == 0)
return I - 1;
Token.push_back('"');
return I;
}
Token.append(BackslashCount, '\\');
return I - 1;
}
void cl::TokenizeWindowsCommandLine(StringRef Src, StringSaver &Saver,
SmallVectorImpl<const char *> &NewArgv,
bool MarkEOLs) {
SmallString<128> Token;
// This is a small state machine to consume characters until it reaches the
// end of the source string.
enum { INIT, UNQUOTED, QUOTED } State = INIT;
for (size_t I = 0, E = Src.size(); I != E; ++I) {
// INIT state indicates that the current input index is at the start of
// the string or between tokens.
if (State == INIT) {
if (isWhitespace(Src[I])) {
// Mark the end of lines in response files
if (MarkEOLs && Src[I] == '\n')
NewArgv.push_back(nullptr);
continue;
}
if (Src[I] == '"') {
State = QUOTED;
continue;
}
if (Src[I] == '\\') {
I = parseBackslash(Src, I, Token);
State = UNQUOTED;
continue;
}
Token.push_back(Src[I]);
State = UNQUOTED;
continue;
}
// UNQUOTED state means that it's reading a token not quoted by double
// quotes.
if (State == UNQUOTED) {
// Whitespace means the end of the token.
if (isWhitespace(Src[I])) {
NewArgv.push_back(Saver.save(Token.c_str()));
Token.clear();
State = INIT;
// Mark the end of lines in response files
if (MarkEOLs && Src[I] == '\n')
NewArgv.push_back(nullptr);
continue;
}
if (Src[I] == '"') {
State = QUOTED;
continue;
}
if (Src[I] == '\\') {
I = parseBackslash(Src, I, Token);
continue;
}
Token.push_back(Src[I]);
continue;
}
// QUOTED state means that it's reading a token quoted by double quotes.
if (State == QUOTED) {
if (Src[I] == '"') {
State = UNQUOTED;
continue;
}
if (Src[I] == '\\') {
I = parseBackslash(Src, I, Token);
continue;
}
Token.push_back(Src[I]);
}
}
// Append the last token after hitting EOF with no whitespace.
if (!Token.empty())
NewArgv.push_back(Saver.save(Token.c_str()));
// Mark the end of response files
if (MarkEOLs)
NewArgv.push_back(nullptr);
}
// It is called byte order marker but the UTF-8 BOM is actually not affected
// by the host system's endianness.
static bool hasUTF8ByteOrderMark(ArrayRef<char> S) {
return (S.size() >= 3 && S[0] == '\xef' && S[1] == '\xbb' && S[2] == '\xbf');
}
static bool ExpandResponseFile(const char *FName, StringSaver &Saver,
TokenizerCallback Tokenizer,
SmallVectorImpl<const char *> &NewArgv,
bool MarkEOLs = false) {
ErrorOr<std::unique_ptr<MemoryBuffer>> MemBufOrErr =
MemoryBuffer::getFile(FName);
if (!MemBufOrErr)
return false;
MemoryBuffer &MemBuf = *MemBufOrErr.get();
StringRef Str(MemBuf.getBufferStart(), MemBuf.getBufferSize());
// If we have a UTF-16 byte order mark, convert to UTF-8 for parsing.
ArrayRef<char> BufRef(MemBuf.getBufferStart(), MemBuf.getBufferEnd());
std::string UTF8Buf;
if (hasUTF16ByteOrderMark(BufRef)) {
if (!convertUTF16ToUTF8String(BufRef, UTF8Buf))
return false;
Str = StringRef(UTF8Buf);
}
// If we see UTF-8 BOM sequence at the beginning of a file, we shall remove
// these bytes before parsing.
// Reference: http://en.wikipedia.org/wiki/UTF-8#Byte_order_mark
else if (hasUTF8ByteOrderMark(BufRef))
Str = StringRef(BufRef.data() + 3, BufRef.size() - 3);
// Tokenize the contents into NewArgv.
Tokenizer(Str, Saver, NewArgv, MarkEOLs);
return true;
}
/// \brief Expand response files on a command line recursively using the given
/// StringSaver and tokenization strategy.
bool cl::ExpandResponseFiles(StringSaver &Saver, TokenizerCallback Tokenizer,
SmallVectorImpl<const char *> &Argv,
bool MarkEOLs) {
unsigned RspFiles = 0;
bool AllExpanded = true;
// Don't cache Argv.size() because it can change.
for (unsigned I = 0; I != Argv.size();) {
const char *Arg = Argv[I];
// Check if it is an EOL marker
if (Arg == nullptr) {
++I;
continue;
}
if (Arg[0] != '@') {
++I;
continue;
}
// If we have too many response files, leave some unexpanded. This avoids
// crashing on self-referential response files.
if (RspFiles++ > 20)
return false;
// Replace this response file argument with the tokenization of its
// contents. Nested response files are expanded in subsequent iterations.
// FIXME: If a nested response file uses a relative path, is it relative to
// the cwd of the process or the response file?
SmallVector<const char *, 0> ExpandedArgv;
if (!ExpandResponseFile(Arg + 1, Saver, Tokenizer, ExpandedArgv,
MarkEOLs)) {
// We couldn't read this file, so we leave it in the argument stream and
// move on.
AllExpanded = false;
++I;
continue;
}
Argv.erase(Argv.begin() + I);
Argv.insert(Argv.begin() + I, ExpandedArgv.begin(), ExpandedArgv.end());
}
return AllExpanded;
}
/// ParseEnvironmentOptions - An alternative entry point to the
/// CommandLine library, which allows you to read the program's name
/// from the caller (as PROGNAME) and its command-line arguments from
/// an environment variable (whose name is given in ENVVAR).
///
void cl::ParseEnvironmentOptions(const char *progName, const char *envVar,
const char *Overview) {
// Check args.
assert(progName && "Program name not specified");
assert(envVar && "Environment variable name missing");
// Get the environment variable they want us to parse options out of.
const char *envValue = getenv(envVar);
if (!envValue)
return;
// Get program's "name", which we wouldn't know without the caller
// telling us.
SmallVector<const char *, 20> newArgv;
BumpPtrAllocator A;
BumpPtrStringSaver Saver(A);
newArgv.push_back(Saver.save(progName));
// Parse the value of the environment variable into a "command line"
// and hand it off to ParseCommandLineOptions().
TokenizeGNUCommandLine(envValue, Saver, newArgv);
int newArgc = static_cast<int>(newArgv.size());
ParseCommandLineOptions(newArgc, &newArgv[0], Overview);
}
void cl::ParseCommandLineOptions(int argc, const char *const *argv,
const char *Overview) {
GlobalParser->ParseCommandLineOptions(argc, argv, Overview);
}
void CommandLineParser::ParseCommandLineOptions(int argc,
const char *const *argv,
const char *Overview) {
assert(hasOptions() && "No options specified!");
// Expand response files.
SmallVector<const char *, 20> newArgv(argv, argv + argc);
BumpPtrAllocator A;
BumpPtrStringSaver Saver(A);
ExpandResponseFiles(Saver, TokenizeGNUCommandLine, newArgv);
argv = &newArgv[0];
argc = static_cast<int>(newArgv.size());
// Copy the program name into ProgName, making sure not to overflow it.
ProgramName = sys::path::filename(argv[0]);
ProgramOverview = Overview;
bool ErrorParsing = false;
// Check out the positional arguments to collect information about them.
unsigned NumPositionalRequired = 0;
// Determine whether or not there are an unlimited number of positionals
bool HasUnlimitedPositionals = false;
if (ConsumeAfterOpt) {
assert(PositionalOpts.size() > 0 &&
"Cannot specify cl::ConsumeAfter without a positional argument!");
}
if (!PositionalOpts.empty()) {
// Calculate how many positional values are _required_.
bool UnboundedFound = false;
for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
Option *Opt = PositionalOpts[i];
if (RequiresValue(Opt))
++NumPositionalRequired;
else if (ConsumeAfterOpt) {
// ConsumeAfter cannot be combined with "optional" positional options
// unless there is only one positional argument...
if (PositionalOpts.size() > 1)
ErrorParsing |= Opt->error(
"error - this positional option will never be matched, "
"because it does not Require a value, and a "
"cl::ConsumeAfter option is active!");
} else if (UnboundedFound && !Opt->ArgStr[0]) {
// This option does not "require" a value... Make sure this option is
// not specified after an option that eats all extra arguments, or this
// one will never get any!
//
ErrorParsing |= Opt->error("error - option can never match, because "
"another positional argument will match an "
"unbounded number of values, and this option"
" does not require a value!");
errs() << ProgramName << ": CommandLine Error: Option '" << Opt->ArgStr
<< "' is all messed up!\n";
errs() << PositionalOpts.size();
}
UnboundedFound |= EatsUnboundedNumberOfValues(Opt);
}
HasUnlimitedPositionals = UnboundedFound || ConsumeAfterOpt;
}
// PositionalVals - A vector of "positional" arguments we accumulate into
// the process at the end.
//
SmallVector<std::pair<StringRef, unsigned>, 4> PositionalVals;
// If the program has named positional arguments, and the name has been run
// across, keep track of which positional argument was named. Otherwise put
// the positional args into the PositionalVals list...
Option *ActivePositionalArg = nullptr;
// Loop over all of the arguments... processing them.
bool DashDashFound = false; // Have we read '--'?
for (int i = 1; i < argc; ++i) {
Option *Handler = nullptr;
Option *NearestHandler = nullptr;
std::string NearestHandlerString;
StringRef Value;
StringRef ArgName = "";
// Check to see if this is a positional argument. This argument is
// considered to be positional if it doesn't start with '-', if it is "-"
// itself, or if we have seen "--" already.
//
if (argv[i][0] != '-' || argv[i][1] == 0 || DashDashFound) {
// Positional argument!
if (ActivePositionalArg) {
ProvidePositionalOption(ActivePositionalArg, argv[i], i);
continue; // We are done!
}
if (!PositionalOpts.empty()) {
PositionalVals.push_back(std::make_pair(argv[i], i));
// All of the positional arguments have been fulfulled, give the rest to
// the consume after option... if it's specified...
//
if (PositionalVals.size() >= NumPositionalRequired && ConsumeAfterOpt) {
for (++i; i < argc; ++i)
PositionalVals.push_back(std::make_pair(argv[i], i));
break; // Handle outside of the argument processing loop...
}
// Delay processing positional arguments until the end...
continue;
}
} else if (argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] == 0 &&
!DashDashFound) {
DashDashFound = true; // This is the mythical "--"?
continue; // Don't try to process it as an argument itself.
} else if (ActivePositionalArg &&
(ActivePositionalArg->getMiscFlags() & PositionalEatsArgs)) {
// If there is a positional argument eating options, check to see if this
// option is another positional argument. If so, treat it as an argument,
// otherwise feed it to the eating positional.
ArgName = argv[i] + 1;
// Eat leading dashes.
while (!ArgName.empty() && ArgName[0] == '-')
ArgName = ArgName.substr(1);
Handler = LookupOption(ArgName, Value);
if (!Handler || Handler->getFormattingFlag() != cl::Positional) {
ProvidePositionalOption(ActivePositionalArg, argv[i], i);
continue; // We are done!
}
} else { // We start with a '-', must be an argument.
ArgName = argv[i] + 1;
// Eat leading dashes.
while (!ArgName.empty() && ArgName[0] == '-')
ArgName = ArgName.substr(1);
Handler = LookupOption(ArgName, Value);
// Check to see if this "option" is really a prefixed or grouped argument.
if (!Handler)
Handler = HandlePrefixedOrGroupedOption(ArgName, Value, ErrorParsing,
OptionsMap);
// Otherwise, look for the closest available option to report to the user
// in the upcoming error.
if (!Handler && SinkOpts.empty())
NearestHandler =
LookupNearestOption(ArgName, OptionsMap, NearestHandlerString);
}
if (!Handler) {
if (SinkOpts.empty()) {
errs() << ProgramName << ": Unknown command line argument '" << argv[i]
<< "'. Try: '" << argv[0] << " -help'\n";
if (NearestHandler) {
// If we know a near match, report it as well.
errs() << ProgramName << ": Did you mean '-" << NearestHandlerString
<< "'?\n";
}
ErrorParsing = true;
} else {
for (SmallVectorImpl<Option *>::iterator I = SinkOpts.begin(),
E = SinkOpts.end();
I != E; ++I)
(*I)->addOccurrence(i, "", argv[i]);
}
continue;
}
// If this is a named positional argument, just remember that it is the
// active one...
if (Handler->getFormattingFlag() == cl::Positional)
ActivePositionalArg = Handler;
else
ErrorParsing |= ProvideOption(Handler, ArgName, Value, argc, argv, i);
}
// Check and handle positional arguments now...
if (NumPositionalRequired > PositionalVals.size()) {
errs() << ProgramName
<< ": Not enough positional command line arguments specified!\n"
<< "Must specify at least " << NumPositionalRequired
<< " positional arguments: See: " << argv[0] << " -help\n";
ErrorParsing = true;
} else if (!HasUnlimitedPositionals &&
PositionalVals.size() > PositionalOpts.size()) {
errs() << ProgramName << ": Too many positional arguments specified!\n"
<< "Can specify at most " << PositionalOpts.size()
<< " positional arguments: See: " << argv[0] << " -help\n";
ErrorParsing = true;
} else if (!ConsumeAfterOpt) {
// Positional args have already been handled if ConsumeAfter is specified.
unsigned ValNo = 0, NumVals = static_cast<unsigned>(PositionalVals.size());
for (size_t i = 0, e = PositionalOpts.size(); i != e; ++i) {
if (RequiresValue(PositionalOpts[i])) {
ProvidePositionalOption(PositionalOpts[i], PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
--NumPositionalRequired; // We fulfilled our duty...
}
// If we _can_ give this option more arguments, do so now, as long as we
// do not give it values that others need. 'Done' controls whether the
// option even _WANTS_ any more.
//
bool Done = PositionalOpts[i]->getNumOccurrencesFlag() == cl::Required;
while (NumVals - ValNo > NumPositionalRequired && !Done) {
switch (PositionalOpts[i]->getNumOccurrencesFlag()) {
case cl::Optional:
Done = true; // Optional arguments want _at most_ one value
// FALL THROUGH
case cl::ZeroOrMore: // Zero or more will take all they can get...
case cl::OneOrMore: // One or more will take all they can get...
ProvidePositionalOption(PositionalOpts[i],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
break;
default:
llvm_unreachable("Internal error, unexpected NumOccurrences flag in "
"positional argument processing!");
}
}
}
} else {
assert(ConsumeAfterOpt && NumPositionalRequired <= PositionalVals.size());
unsigned ValNo = 0;
for (size_t j = 1, e = PositionalOpts.size(); j != e; ++j)
if (RequiresValue(PositionalOpts[j])) {
ErrorParsing |= ProvidePositionalOption(PositionalOpts[j],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
}
// Handle the case where there is just one positional option, and it's
// optional. In this case, we want to give JUST THE FIRST option to the
// positional option and keep the rest for the consume after. The above
// loop would have assigned no values to positional options in this case.
//
if (PositionalOpts.size() == 1 && ValNo == 0 && !PositionalVals.empty()) {
ErrorParsing |= ProvidePositionalOption(PositionalOpts[0],
PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
ValNo++;
}
// Handle over all of the rest of the arguments to the
// cl::ConsumeAfter command line option...
for (; ValNo != PositionalVals.size(); ++ValNo)
ErrorParsing |=
ProvidePositionalOption(ConsumeAfterOpt, PositionalVals[ValNo].first,
PositionalVals[ValNo].second);
}
// Loop over args and make sure all required args are specified!
for (const auto &Opt : OptionsMap) {
switch (Opt.second->getNumOccurrencesFlag()) {
case Required:
case OneOrMore:
if (Opt.second->getNumOccurrences() == 0) {
Opt.second->error("must be specified at least once!");
ErrorParsing = true;
}
// Fall through
default:
break;
}
}
// Now that we know if -debug is specified, we can use it.
// Note that if ReadResponseFiles == true, this must be done before the
// memory allocated for the expanded command line is free()d below.
DEBUG(dbgs() << "Args: ";
for (int i = 0; i < argc; ++i) dbgs() << argv[i] << ' ';
dbgs() << '\n';);
// Free all of the memory allocated to the map. Command line options may only
// be processed once!
MoreHelp.clear();
// If we had an error processing our arguments, don't let the program execute
if (ErrorParsing)
exit(1);
}
//===----------------------------------------------------------------------===//
// Option Base class implementation
//
bool Option::error(const Twine &Message, StringRef ArgName) {
if (!ArgName.data())
ArgName = ArgStr;
if (ArgName.empty())
errs() << HelpStr; // Be nice for positional arguments
else
errs() << GlobalParser->ProgramName << ": for the -" << ArgName;
errs() << " option: " << Message << "\n";
return true;
}
bool Option::addOccurrence(unsigned pos, StringRef ArgName, StringRef Value,
bool MultiArg) {
if (!MultiArg)
NumOccurrences++; // Increment the number of times we have been seen
switch (getNumOccurrencesFlag()) {
case Optional:
if (NumOccurrences > 1)
return error("may only occur zero or one times!", ArgName);
break;
case Required:
if (NumOccurrences > 1)
return error("must occur exactly one time!", ArgName);
// Fall through
case OneOrMore:
case ZeroOrMore:
case ConsumeAfter:
break;
}
return handleOccurrence(pos, ArgName, Value);
}
// getValueStr - Get the value description string, using "DefaultMsg" if nothing
// has been specified yet.
//
static const char *getValueStr(const Option &O, const char *DefaultMsg) {
if (O.ValueStr[0] == 0)
return DefaultMsg;
return O.ValueStr;
}
//===----------------------------------------------------------------------===//
// cl::alias class implementation
//
// Return the width of the option tag for printing...
size_t alias::getOptionWidth() const { return std::strlen(ArgStr) + 6; }
static void printHelpStr(StringRef HelpStr, size_t Indent,
size_t FirstLineIndentedBy) {
std::pair<StringRef, StringRef> Split = HelpStr.split('\n');
outs().indent(Indent - FirstLineIndentedBy) << " - " << Split.first << "\n";
while (!Split.second.empty()) {
Split = Split.second.split('\n');
outs().indent(Indent) << Split.first << "\n";
}
}
// Print out the option for the alias.
void alias::printOptionInfo(size_t GlobalWidth) const {
outs() << " -" << ArgStr;
printHelpStr(HelpStr, GlobalWidth, std::strlen(ArgStr) + 6);
}
//===----------------------------------------------------------------------===//
// Parser Implementation code...
//
// basic_parser implementation
//
// Return the width of the option tag for printing...
size_t basic_parser_impl::getOptionWidth(const Option &O) const {
size_t Len = std::strlen(O.ArgStr);
if (const char *ValName = getValueName())
Len += std::strlen(getValueStr(O, ValName)) + 3;
return Len + 6;
}
// printOptionInfo - Print out information about this option. The
// to-be-maintained width is specified.
//
void basic_parser_impl::printOptionInfo(const Option &O,
size_t GlobalWidth) const {
outs() << " -" << O.ArgStr;
if (const char *ValName = getValueName())
outs() << "=<" << getValueStr(O, ValName) << '>';
printHelpStr(O.HelpStr, GlobalWidth, getOptionWidth(O));
}
void basic_parser_impl::printOptionName(const Option &O,
size_t GlobalWidth) const {
outs() << " -" << O.ArgStr;
outs().indent(GlobalWidth - std::strlen(O.ArgStr));
}
// parser<bool> implementation
//
bool parser<bool>::parse(Option &O, StringRef ArgName, StringRef Arg,
bool &Value) {
if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
Arg == "1") {
Value = true;
return false;
}
if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
Value = false;
return false;
}
return O.error("'" + Arg +
"' is invalid value for boolean argument! Try 0 or 1");
}
// parser<boolOrDefault> implementation
//
bool parser<boolOrDefault>::parse(Option &O, StringRef ArgName, StringRef Arg,
boolOrDefault &Value) {
if (Arg == "" || Arg == "true" || Arg == "TRUE" || Arg == "True" ||
Arg == "1") {
Value = BOU_TRUE;
return false;
}
if (Arg == "false" || Arg == "FALSE" || Arg == "False" || Arg == "0") {
Value = BOU_FALSE;
return false;
}
return O.error("'" + Arg +
"' is invalid value for boolean argument! Try 0 or 1");
}
// parser<int> implementation
//
bool parser<int>::parse(Option &O, StringRef ArgName, StringRef Arg,
int &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for integer argument!");
return false;
}
// parser<unsigned> implementation
//
bool parser<unsigned>::parse(Option &O, StringRef ArgName, StringRef Arg,
unsigned &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for uint argument!");
return false;
}
// parser<unsigned long long> implementation
//
bool parser<unsigned long long>::parse(Option &O, StringRef ArgName,
StringRef Arg,
unsigned long long &Value) {
if (Arg.getAsInteger(0, Value))
return O.error("'" + Arg + "' value invalid for uint argument!");
return false;
}
// parser<double>/parser<float> implementation
//
static bool parseDouble(Option &O, StringRef Arg, double &Value) {
SmallString<32> TmpStr(Arg.begin(), Arg.end());
const char *ArgStart = TmpStr.c_str();
char *End;
Value = strtod(ArgStart, &End);
if (*End != 0)
return O.error("'" + Arg + "' value invalid for floating point argument!");
return false;
}
bool parser<double>::parse(Option &O, StringRef ArgName, StringRef Arg,
double &Val) {
return parseDouble(O, Arg, Val);
}
bool parser<float>::parse(Option &O, StringRef ArgName, StringRef Arg,
float &Val) {
double dVal;
if (parseDouble(O, Arg, dVal))
return true;
Val = (float)dVal;
return false;
}
// generic_parser_base implementation
//
// findOption - Return the option number corresponding to the specified
// argument string. If the option is not found, getNumOptions() is returned.
//
unsigned generic_parser_base::findOption(const char *Name) {
unsigned e = getNumOptions();
for (unsigned i = 0; i != e; ++i) {
if (strcmp(getOption(i), Name) == 0)
return i;
}
return e;
}
// Return the width of the option tag for printing...
size_t generic_parser_base::getOptionWidth(const Option &O) const {
if (O.hasArgStr()) {
size_t Size = std::strlen(O.ArgStr) + 6;
for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
Size = std::max(Size, std::strlen(getOption(i)) + 8);
return Size;
} else {
size_t BaseSize = 0;
for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
BaseSize = std::max(BaseSize, std::strlen(getOption(i)) + 8);
return BaseSize;
}
}
// printOptionInfo - Print out information about this option. The
// to-be-maintained width is specified.
//
void generic_parser_base::printOptionInfo(const Option &O,
size_t GlobalWidth) const {
if (O.hasArgStr()) {
outs() << " -" << O.ArgStr;
printHelpStr(O.HelpStr, GlobalWidth, std::strlen(O.ArgStr) + 6);
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
size_t NumSpaces = GlobalWidth - strlen(getOption(i)) - 8;
outs() << " =" << getOption(i);
outs().indent(NumSpaces) << " - " << getDescription(i) << '\n';
}
} else {
if (O.HelpStr[0])
outs() << " " << O.HelpStr << '\n';
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
const char *Option = getOption(i);
outs() << " -" << Option;
printHelpStr(getDescription(i), GlobalWidth, std::strlen(Option) + 8);
}
}
}
static const size_t MaxOptWidth = 8; // arbitrary spacing for printOptionDiff
// printGenericOptionDiff - Print the value of this option and it's default.
//
// "Generic" options have each value mapped to a name.
void generic_parser_base::printGenericOptionDiff(
const Option &O, const GenericOptionValue &Value,
const GenericOptionValue &Default, size_t GlobalWidth) const {
outs() << " -" << O.ArgStr;
outs().indent(GlobalWidth - std::strlen(O.ArgStr));
unsigned NumOpts = getNumOptions();
for (unsigned i = 0; i != NumOpts; ++i) {
if (Value.compare(getOptionValue(i)))
continue;
outs() << "= " << getOption(i);
size_t L = std::strlen(getOption(i));
size_t NumSpaces = MaxOptWidth > L ? MaxOptWidth - L : 0;
outs().indent(NumSpaces) << " (default: ";
for (unsigned j = 0; j != NumOpts; ++j) {
if (Default.compare(getOptionValue(j)))
continue;
outs() << getOption(j);
break;
}
outs() << ")\n";
return;
}
outs() << "= *unknown option value*\n";
}
// printOptionDiff - Specializations for printing basic value types.
//
#define PRINT_OPT_DIFF(T) \
void parser<T>::printOptionDiff(const Option &O, T V, OptionValue<T> D, \
size_t GlobalWidth) const { \
printOptionName(O, GlobalWidth); \
std::string Str; \
{ \
raw_string_ostream SS(Str); \
SS << V; \
} \
outs() << "= " << Str; \
size_t NumSpaces = \
MaxOptWidth > Str.size() ? MaxOptWidth - Str.size() : 0; \
outs().indent(NumSpaces) << " (default: "; \
if (D.hasValue()) \
outs() << D.getValue(); \
else \
outs() << "*no default*"; \
outs() << ")\n"; \
}
PRINT_OPT_DIFF(bool)
PRINT_OPT_DIFF(boolOrDefault)
PRINT_OPT_DIFF(int)
PRINT_OPT_DIFF(unsigned)
PRINT_OPT_DIFF(unsigned long long)
PRINT_OPT_DIFF(double)
PRINT_OPT_DIFF(float)
PRINT_OPT_DIFF(char)
void parser<std::string>::printOptionDiff(const Option &O, StringRef V,
OptionValue<std::string> D,
size_t GlobalWidth) const {
printOptionName(O, GlobalWidth);
outs() << "= " << V;
size_t NumSpaces = MaxOptWidth > V.size() ? MaxOptWidth - V.size() : 0;
outs().indent(NumSpaces) << " (default: ";
if (D.hasValue())
outs() << D.getValue();
else
outs() << "*no default*";
outs() << ")\n";
}
// Print a placeholder for options that don't yet support printOptionDiff().
void basic_parser_impl::printOptionNoValue(const Option &O,
size_t GlobalWidth) const {
printOptionName(O, GlobalWidth);
outs() << "= *cannot print option value*\n";
}
//===----------------------------------------------------------------------===//
// -help and -help-hidden option implementation
//
static int OptNameCompare(const std::pair<const char *, Option *> *LHS,
const std::pair<const char *, Option *> *RHS) {
return strcmp(LHS->first, RHS->first);
}
// Copy Options into a vector so we can sort them as we like.
static void sortOpts(StringMap<Option *> &OptMap,
SmallVectorImpl<std::pair<const char *, Option *>> &Opts,
bool ShowHidden) {
SmallPtrSet<Option *, 128> OptionSet; // Duplicate option detection.
for (StringMap<Option *>::iterator I = OptMap.begin(), E = OptMap.end();
I != E; ++I) {
// Ignore really-hidden options.
if (I->second->getOptionHiddenFlag() == ReallyHidden)
continue;
// Unless showhidden is set, ignore hidden flags.
if (I->second->getOptionHiddenFlag() == Hidden && !ShowHidden)
continue;
// If we've already seen this option, don't add it to the list again.
if (!OptionSet.insert(I->second).second)
continue;
Opts.push_back(
std::pair<const char *, Option *>(I->getKey().data(), I->second));
}
// Sort the options list alphabetically.
array_pod_sort(Opts.begin(), Opts.end(), OptNameCompare);
}
namespace {
class HelpPrinter {
protected:
const bool ShowHidden;
typedef SmallVector<std::pair<const char *, Option *>, 128>
StrOptionPairVector;
// Print the options. Opts is assumed to be alphabetically sorted.
virtual void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) {
for (size_t i = 0, e = Opts.size(); i != e; ++i)
Opts[i].second->printOptionInfo(MaxArgLen);
}
public:
explicit HelpPrinter(bool showHidden) : ShowHidden(showHidden) {}
virtual ~HelpPrinter() {}
// Invoke the printer.
void operator=(bool Value) {
if (!Value)
return;
StrOptionPairVector Opts;
sortOpts(GlobalParser->OptionsMap, Opts, ShowHidden);
if (GlobalParser->ProgramOverview)
outs() << "OVERVIEW: " << GlobalParser->ProgramOverview << "\n";
outs() << "USAGE: " << GlobalParser->ProgramName << " [options]";
for (auto Opt : GlobalParser->PositionalOpts) {
if (Opt->ArgStr[0])
outs() << " --" << Opt->ArgStr;
outs() << " " << Opt->HelpStr;
}
// Print the consume after option info if it exists...
if (GlobalParser->ConsumeAfterOpt)
outs() << " " << GlobalParser->ConsumeAfterOpt->HelpStr;
outs() << "\n\n";
// Compute the maximum argument length...
size_t MaxArgLen = 0;
for (size_t i = 0, e = Opts.size(); i != e; ++i)
MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
outs() << "OPTIONS:\n";
printOptions(Opts, MaxArgLen);
// Print any extra help the user has declared.
for (auto I : GlobalParser->MoreHelp)
outs() << I;
GlobalParser->MoreHelp.clear();
// Halt the program since help information was printed
exit(0);
}
};
class CategorizedHelpPrinter : public HelpPrinter {
public:
explicit CategorizedHelpPrinter(bool showHidden) : HelpPrinter(showHidden) {}
// Helper function for printOptions().
// It shall return a negative value if A's name should be lexicographically
// ordered before B's name. It returns a value greater equal zero otherwise.
static int OptionCategoryCompare(OptionCategory *const *A,
OptionCategory *const *B) {
return strcmp((*A)->getName(), (*B)->getName());
}
// Make sure we inherit our base class's operator=()
using HelpPrinter::operator=;
protected:
void printOptions(StrOptionPairVector &Opts, size_t MaxArgLen) override {
std::vector<OptionCategory *> SortedCategories;
std::map<OptionCategory *, std::vector<Option *>> CategorizedOptions;
// Collect registered option categories into vector in preparation for
// sorting.
for (auto I = GlobalParser->RegisteredOptionCategories.begin(),
E = GlobalParser->RegisteredOptionCategories.end();
I != E; ++I) {
SortedCategories.push_back(*I);
}
// Sort the different option categories alphabetically.
assert(SortedCategories.size() > 0 && "No option categories registered!");
array_pod_sort(SortedCategories.begin(), SortedCategories.end(),
OptionCategoryCompare);
// Create map to empty vectors.
for (std::vector<OptionCategory *>::const_iterator
I = SortedCategories.begin(),
E = SortedCategories.end();
I != E; ++I)
CategorizedOptions[*I] = std::vector<Option *>();
// Walk through pre-sorted options and assign into categories.
// Because the options are already alphabetically sorted the
// options within categories will also be alphabetically sorted.
for (size_t I = 0, E = Opts.size(); I != E; ++I) {
Option *Opt = Opts[I].second;
assert(CategorizedOptions.count(Opt->Category) > 0 &&
"Option has an unregistered category");
CategorizedOptions[Opt->Category].push_back(Opt);
}
// Now do printing.
for (std::vector<OptionCategory *>::const_iterator
Category = SortedCategories.begin(),
E = SortedCategories.end();
Category != E; ++Category) {
// Hide empty categories for -help, but show for -help-hidden.
bool IsEmptyCategory = CategorizedOptions[*Category].size() == 0;
if (!ShowHidden && IsEmptyCategory)
continue;
// Print category information.
outs() << "\n";
outs() << (*Category)->getName() << ":\n";
// Check if description is set.
if ((*Category)->getDescription() != nullptr)
outs() << (*Category)->getDescription() << "\n\n";
else
outs() << "\n";
// When using -help-hidden explicitly state if the category has no
// options associated with it.
if (IsEmptyCategory) {
outs() << " This option category has no options.\n";
continue;
}
// Loop over the options in the category and print.
for (std::vector<Option *>::const_iterator
Opt = CategorizedOptions[*Category].begin(),
E = CategorizedOptions[*Category].end();
Opt != E; ++Opt)
(*Opt)->printOptionInfo(MaxArgLen);
}
}
};
// This wraps the Uncategorizing and Categorizing printers and decides
// at run time which should be invoked.
class HelpPrinterWrapper {
private:
HelpPrinter &UncategorizedPrinter;
CategorizedHelpPrinter &CategorizedPrinter;
public:
explicit HelpPrinterWrapper(HelpPrinter &UncategorizedPrinter,
CategorizedHelpPrinter &CategorizedPrinter)
: UncategorizedPrinter(UncategorizedPrinter),
CategorizedPrinter(CategorizedPrinter) {}
// Invoke the printer.
void operator=(bool Value);
};
} // End anonymous namespace
// Declare the four HelpPrinter instances that are used to print out help, or
// help-hidden as an uncategorized list or in categories.
static HelpPrinter UncategorizedNormalPrinter(false);
static HelpPrinter UncategorizedHiddenPrinter(true);
static CategorizedHelpPrinter CategorizedNormalPrinter(false);
static CategorizedHelpPrinter CategorizedHiddenPrinter(true);
// Declare HelpPrinter wrappers that will decide whether or not to invoke
// a categorizing help printer
static HelpPrinterWrapper WrappedNormalPrinter(UncategorizedNormalPrinter,
CategorizedNormalPrinter);
static HelpPrinterWrapper WrappedHiddenPrinter(UncategorizedHiddenPrinter,
CategorizedHiddenPrinter);
// Define a category for generic options that all tools should have.
static cl::OptionCategory GenericCategory("Generic Options");
// Define uncategorized help printers.
// -help-list is hidden by default because if Option categories are being used
// then -help behaves the same as -help-list.
static cl::opt<HelpPrinter, true, parser<bool>> HLOp(
"help-list",
cl::desc("Display list of available options (-help-list-hidden for more)"),
cl::location(UncategorizedNormalPrinter), cl::Hidden, cl::ValueDisallowed,
cl::cat(GenericCategory));
static cl::opt<HelpPrinter, true, parser<bool>>
HLHOp("help-list-hidden", cl::desc("Display list of all available options"),
cl::location(UncategorizedHiddenPrinter), cl::Hidden,
cl::ValueDisallowed, cl::cat(GenericCategory));
// Define uncategorized/categorized help printers. These printers change their
// behaviour at runtime depending on whether one or more Option categories have
// been declared.
static cl::opt<HelpPrinterWrapper, true, parser<bool>>
HOp("help", cl::desc("Display available options (-help-hidden for more)"),
cl::location(WrappedNormalPrinter), cl::ValueDisallowed,
cl::cat(GenericCategory));
static cl::opt<HelpPrinterWrapper, true, parser<bool>>
HHOp("help-hidden", cl::desc("Display all available options"),
cl::location(WrappedHiddenPrinter), cl::Hidden, cl::ValueDisallowed,
cl::cat(GenericCategory));
static cl::opt<bool> PrintOptions(
"print-options",
cl::desc("Print non-default options after command line parsing"),
cl::Hidden, cl::init(false), cl::cat(GenericCategory));
static cl::opt<bool> PrintAllOptions(
"print-all-options",
cl::desc("Print all option values after command line parsing"), cl::Hidden,
cl::init(false), cl::cat(GenericCategory));
void HelpPrinterWrapper::operator=(bool Value) {
if (!Value)
return;
// Decide which printer to invoke. If more than one option category is
// registered then it is useful to show the categorized help instead of
// uncategorized help.
if (GlobalParser->RegisteredOptionCategories.size() > 1) {
// unhide -help-list option so user can have uncategorized output if they
// want it.
HLOp.setHiddenFlag(NotHidden);
CategorizedPrinter = true; // Invoke categorized printer
} else
UncategorizedPrinter = true; // Invoke uncategorized printer
}
// Print the value of each option.
void cl::PrintOptionValues() { GlobalParser->printOptionValues(); }
void CommandLineParser::printOptionValues() {
if (!PrintOptions && !PrintAllOptions)
return;
SmallVector<std::pair<const char *, Option *>, 128> Opts;
sortOpts(OptionsMap, Opts, /*ShowHidden*/ true);
// Compute the maximum argument length...
size_t MaxArgLen = 0;
for (size_t i = 0, e = Opts.size(); i != e; ++i)
MaxArgLen = std::max(MaxArgLen, Opts[i].second->getOptionWidth());
for (size_t i = 0, e = Opts.size(); i != e; ++i)
Opts[i].second->printOptionValue(MaxArgLen, PrintAllOptions);
}
static void (*OverrideVersionPrinter)() = nullptr;
static std::vector<void (*)()> *ExtraVersionPrinters = nullptr;
namespace {
class VersionPrinter {
public:
void print() {
raw_ostream &OS = outs();
OS << "LLVM (http://llvm.org/):\n"
<< " " << PACKAGE_NAME << " version " << PACKAGE_VERSION;
#ifdef LLVM_VERSION_INFO
OS << " " << LLVM_VERSION_INFO;
#endif
OS << "\n ";
#ifdef LLVM_DEBIAN_INFO
OS << LLVM_DEBIAN_INFO;
#endif
OS << "\n ";
#ifndef __OPTIMIZE__
OS << "DEBUG build";
#else
OS << "Optimized build";
#endif
#ifndef NDEBUG
OS << " with assertions";
#endif
std::string CPU = sys::getHostCPUName();
if (CPU == "generic")
CPU = "(unknown)";
OS << ".\n"
#if (ENABLE_TIMESTAMPS == 1)
<< " Built " << __DATE__ << " (" << __TIME__ << ").\n"
#endif
<< " Default target: " << sys::getDefaultTargetTriple() << '\n'
<< " Host CPU: " << CPU << '\n';
}
void operator=(bool OptionWasSpecified) {
if (!OptionWasSpecified)
return;
if (OverrideVersionPrinter != nullptr) {
(*OverrideVersionPrinter)();
exit(0);
}
print();
// Iterate over any registered extra printers and call them to add further
// information.
if (ExtraVersionPrinters != nullptr) {
outs() << '\n';
for (std::vector<void (*)()>::iterator I = ExtraVersionPrinters->begin(),
E = ExtraVersionPrinters->end();
I != E; ++I)
(*I)();
}
exit(0);
}
};
} // End anonymous namespace
// Define the --version option that prints out the LLVM version for the tool
static VersionPrinter VersionPrinterInstance;
static cl::opt<VersionPrinter, true, parser<bool>>
VersOp("version", cl::desc("Display the version of this program"),
cl::location(VersionPrinterInstance), cl::ValueDisallowed,
cl::cat(GenericCategory));
// Utility function for printing the help message.
void cl::PrintHelpMessage(bool Hidden, bool Categorized) {
// This looks weird, but it actually prints the help message. The Printers are
// types of HelpPrinter and the help gets printed when its operator= is
// invoked. That's because the "normal" usages of the help printer is to be
// assigned true/false depending on whether -help or -help-hidden was given or
// not. Since we're circumventing that we have to make it look like -help or
// -help-hidden were given, so we assign true.
if (!Hidden && !Categorized)
UncategorizedNormalPrinter = true;
else if (!Hidden && Categorized)
CategorizedNormalPrinter = true;
else if (Hidden && !Categorized)
UncategorizedHiddenPrinter = true;
else
CategorizedHiddenPrinter = true;
}
/// Utility function for printing version number.
void cl::PrintVersionMessage() { VersionPrinterInstance.print(); }
void cl::SetVersionPrinter(void (*func)()) { OverrideVersionPrinter = func; }
void cl::AddExtraVersionPrinter(void (*func)()) {
if (!ExtraVersionPrinters)
ExtraVersionPrinters = new std::vector<void (*)()>;
ExtraVersionPrinters->push_back(func);
}
StringMap<Option *> &cl::getRegisteredOptions() {
return GlobalParser->OptionsMap;
}
void cl::HideUnrelatedOptions(cl::OptionCategory &Category) {
for (auto &I : GlobalParser->OptionsMap) {
if (I.second->Category != &Category &&
I.second->Category != &GenericCategory)
I.second->setHiddenFlag(cl::ReallyHidden);
}
}
void cl::HideUnrelatedOptions(ArrayRef<const cl::OptionCategory *> Categories) {
auto CategoriesBegin = Categories.begin();
auto CategoriesEnd = Categories.end();
for (auto &I : GlobalParser->OptionsMap) {
if (std::find(CategoriesBegin, CategoriesEnd, I.second->Category) ==
CategoriesEnd &&
I.second->Category != &GenericCategory)
I.second->setHiddenFlag(cl::ReallyHidden);
}
}
void LLVMParseCommandLineOptions(int argc, const char *const *argv,
const char *Overview) {
llvm::cl::ParseCommandLineOptions(argc, argv, Overview);
}
|