func.cc revision df1fc8b2ead00bad8c23065affb9576a4b03cff5
1// Copyright 2015 Google Inc. All rights reserved 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15// +build ignore 16 17#include "func.h" 18 19#include <glob.h> 20#include <limits.h> 21#include <stdio.h> 22#include <stdlib.h> 23 24#include <algorithm> 25#include <iterator> 26#include <memory> 27#include <unordered_map> 28 29#include "ast.h" 30#include "eval.h" 31#include "log.h" 32#include "parser.h" 33#include "strutil.h" 34#include "var.h" 35 36namespace { 37 38void PatsubstFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 39 shared_ptr<string> pat_str = args[0]->Eval(ev); 40 shared_ptr<string> repl = args[1]->Eval(ev); 41 shared_ptr<string> str = args[2]->Eval(ev); 42 WordWriter ww(s); 43 Pattern pat(*pat_str); 44 for (StringPiece tok : WordScanner(*str)) { 45 ww.MaybeAddWhitespace(); 46 pat.AppendSubst(tok, *repl, s); 47 } 48} 49 50void StripFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 51 shared_ptr<string> str = args[0]->Eval(ev); 52 WordWriter ww(s); 53 for (StringPiece tok : WordScanner(*str)) { 54 ww.Write(tok); 55 } 56} 57 58void SubstFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 59 shared_ptr<string> pat = args[0]->Eval(ev); 60 shared_ptr<string> repl = args[1]->Eval(ev); 61 shared_ptr<string> str = args[2]->Eval(ev); 62 size_t index = 0; 63 while (index < str->size()) { 64 size_t found = str->find(*pat, index); 65 if (found == string::npos) 66 break; 67 AppendString(StringPiece(*str).substr(index, found - index), s); 68 AppendString(*repl, s); 69 index = found + pat->size(); 70 } 71 AppendString(StringPiece(*str).substr(index), s); 72} 73 74void FindstringFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 75 shared_ptr<string> find = args[0]->Eval(ev); 76 shared_ptr<string> in = args[1]->Eval(ev); 77 if (in->find(*find) != string::npos) 78 AppendString(*find, s); 79} 80 81void FilterFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 82 shared_ptr<string> pat_buf = args[0]->Eval(ev); 83 shared_ptr<string> text = args[1]->Eval(ev); 84 vector<Pattern> pats; 85 for (StringPiece pat : WordScanner(*pat_buf)) { 86 pats.push_back(Pattern(pat)); 87 } 88 WordWriter ww(s); 89 for (StringPiece tok : WordScanner(*text)) { 90 for (const Pattern& pat : pats) { 91 if (pat.Match(tok)) { 92 ww.Write(tok); 93 break; 94 } 95 } 96 } 97} 98 99void FilterOutFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 100 shared_ptr<string> pat_buf = args[0]->Eval(ev); 101 shared_ptr<string> text = args[1]->Eval(ev); 102 vector<Pattern> pats; 103 for (StringPiece pat : WordScanner(*pat_buf)) { 104 pats.push_back(Pattern(pat)); 105 } 106 WordWriter ww(s); 107 for (StringPiece tok : WordScanner(*text)) { 108 bool matched = false; 109 for (const Pattern& pat : pats) { 110 if (pat.Match(tok)) { 111 matched = true; 112 break; 113 } 114 } 115 if (!matched) 116 ww.Write(tok); 117 } 118} 119 120void SortFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 121 shared_ptr<string> list = args[0]->Eval(ev); 122 vector<StringPiece> toks; 123 WordScanner(*list).Split(&toks); 124 sort(toks.begin(), toks.end()); 125 WordWriter ww(s); 126 StringPiece prev; 127 for (StringPiece tok : toks) { 128 if (prev != tok) { 129 ww.Write(tok); 130 prev = tok; 131 } 132 } 133} 134 135static int GetNumericValueForFunc(const string& buf) { 136 StringPiece s = TrimLeftSpace(buf); 137 char* end; 138 long n = strtol(s.data(), &end, 10); 139 if (n < 0 || n == LONG_MAX || s.data() + s.size() != end) { 140 return -1; 141 } 142 return n; 143} 144 145void WordFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 146 shared_ptr<string> n_str = args[0]->Eval(ev); 147 int n = GetNumericValueForFunc(*n_str); 148 if (n < 0) { 149 ev->Error(StringPrintf( 150 "*** non-numeric first argument to `word' function: '%s'.", 151 n_str->c_str())); 152 } 153 if (n == 0) { 154 ev->Error("*** first argument to `word' function must be greater than 0."); 155 } 156 157 shared_ptr<string> text = args[1]->Eval(ev); 158 for (StringPiece tok : WordScanner(*text)) { 159 n--; 160 if (n == 0) { 161 AppendString(tok, s); 162 break; 163 } 164 } 165} 166 167void WordlistFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 168 shared_ptr<string> s_str = args[0]->Eval(ev); 169 int si = GetNumericValueForFunc(*s_str); 170 if (si < 0) { 171 ev->Error(StringPrintf( 172 "*** non-numeric first argument to `wordlist' function: '%s'.", 173 s_str->c_str())); 174 } 175 if (si == 0) { 176 ev->Error(StringPrintf( 177 "*** invalid first argument to `wordlist' function: %s`", 178 s_str->c_str())); 179 } 180 181 shared_ptr<string> e_str = args[1]->Eval(ev); 182 int ei = GetNumericValueForFunc(*e_str); 183 if (ei < 0) { 184 ev->Error(StringPrintf( 185 "*** non-numeric second argument to `wordlist' function: '%s'.", 186 e_str->c_str())); 187 } 188 189 shared_ptr<string> text = args[2]->Eval(ev); 190 int i = 0; 191 WordWriter ww(s); 192 for (StringPiece tok : WordScanner(*text)) { 193 i++; 194 if (si <= i && i <= ei) { 195 ww.Write(tok); 196 } 197 } 198} 199 200void WordsFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 201 shared_ptr<string> text = args[0]->Eval(ev); 202 WordScanner ws(*text); 203 int n = 0; 204 for (auto iter = ws.begin(); iter != ws.end(); ++iter) 205 n++; 206 char buf[32]; 207 sprintf(buf, "%d", n); 208 *s += buf; 209} 210 211void FirstwordFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 212 shared_ptr<string> text = args[0]->Eval(ev); 213 for (StringPiece tok : WordScanner(*text)) { 214 AppendString(tok, s); 215 return; 216 } 217} 218 219void LastwordFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 220 shared_ptr<string> text = args[0]->Eval(ev); 221 StringPiece last; 222 for (StringPiece tok : WordScanner(*text)) { 223 last = tok; 224 } 225 AppendString(last, s); 226} 227 228void JoinFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 229 shared_ptr<string> list1 = args[0]->Eval(ev); 230 shared_ptr<string> list2 = args[1]->Eval(ev); 231 WordScanner ws1(*list1); 232 WordScanner ws2(*list2); 233 WordWriter ww(s); 234 for (WordScanner::Iterator iter1 = ws1.begin(), iter2 = ws2.begin(); 235 iter1 != ws1.end() && iter2 != ws2.end(); 236 ++iter1, ++iter2) { 237 ww.Write(*iter1); 238 // Use |AppendString| not to append extra ' '. 239 AppendString(*iter2, s); 240 } 241} 242 243void WildcardFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 244 shared_ptr<string> pat = args[0]->Eval(ev); 245 if (ev->avoid_io()) { 246 *s += "$(/bin/ls -d "; 247 *s += *pat; 248 *s += " 2> /dev/null)"; 249 return; 250 } 251 252 WordWriter ww(s); 253 for (StringPiece tok : WordScanner(*pat)) { 254 ScopedTerminator st(tok); 255 // TODO: Make this faster by not always using glob. 256 glob_t gl; 257 glob(tok.data(), GLOB_NOSORT, NULL, &gl); 258 for (size_t i = 0; i < gl.gl_pathc; i++) { 259 ww.Write(gl.gl_pathv[i]); 260 } 261 globfree(&gl); 262 } 263} 264 265void DirFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 266 shared_ptr<string> text = args[0]->Eval(ev); 267 WordWriter ww(s); 268 for (StringPiece tok : WordScanner(*text)) { 269 ww.Write(Dirname(tok)); 270 if (tok != "/") 271 s->push_back('/'); 272 } 273} 274 275void NotdirFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 276 shared_ptr<string> text = args[0]->Eval(ev); 277 WordWriter ww(s); 278 for (StringPiece tok : WordScanner(*text)) { 279 if (tok == "/") { 280 ww.Write(STRING_PIECE("")); 281 } else { 282 ww.Write(Basename(tok)); 283 } 284 } 285} 286 287void SuffixFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 288 shared_ptr<string> text = args[0]->Eval(ev); 289 WordWriter ww(s); 290 for (StringPiece tok : WordScanner(*text)) { 291 StringPiece suf = GetExt(tok); 292 if (!suf.empty()) 293 ww.Write(suf); 294 } 295} 296 297void BasenameFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 298 shared_ptr<string> text = args[0]->Eval(ev); 299 WordWriter ww(s); 300 for (StringPiece tok : WordScanner(*text)) { 301 ww.Write(StripExt(tok)); 302 } 303} 304 305void AddsuffixFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 306 shared_ptr<string> suf = args[0]->Eval(ev); 307 shared_ptr<string> text = args[1]->Eval(ev); 308 WordWriter ww(s); 309 for (StringPiece tok : WordScanner(*text)) { 310 ww.Write(tok); 311 *s += *suf; 312 } 313} 314 315void AddprefixFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 316 shared_ptr<string> pre = args[0]->Eval(ev); 317 shared_ptr<string> text = args[1]->Eval(ev); 318 WordWriter ww(s); 319 for (StringPiece tok : WordScanner(*text)) { 320 ww.Write(*pre); 321 AppendString(tok, s); 322 } 323} 324 325void RealpathFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 326 shared_ptr<string> text = args[0]->Eval(ev); 327 if (ev->avoid_io()) { 328 *s += "KATI_TODO(realpath)"; 329 return; 330 } 331 332 WordWriter ww(s); 333 for (StringPiece tok : WordScanner(*text)) { 334 ScopedTerminator st(tok); 335 char buf[PATH_MAX]; 336 if (realpath(tok.data(), buf)) 337 *s += buf; 338 } 339} 340 341void AbspathFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 342 shared_ptr<string> text = args[0]->Eval(ev); 343 WordWriter ww(s); 344 string buf; 345 for (StringPiece tok : WordScanner(*text)) { 346 AbsPath(tok, &buf); 347 ww.Write(buf); 348 } 349} 350 351void IfFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 352 shared_ptr<string> cond = args[0]->Eval(ev); 353 if (cond->empty()) { 354 if (args.size() > 2) 355 args[2]->Eval(ev, s); 356 } else { 357 args[1]->Eval(ev, s); 358 } 359} 360 361void AndFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 362 shared_ptr<string> cond; 363 for (Value* a : args) { 364 cond = a->Eval(ev); 365 if (cond->empty()) 366 return; 367 } 368 if (cond.get()) { 369 *s += *cond; 370 } 371} 372 373void OrFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 374 for (Value* a : args) { 375 shared_ptr<string> cond = a->Eval(ev); 376 if (!cond->empty()) { 377 *s += *cond; 378 return; 379 } 380 } 381} 382 383void ValueFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 384 shared_ptr<string> var_name = args[0]->Eval(ev); 385 Var* var = ev->LookupVar(*var_name); 386 AppendString(var->String().as_string(), s); 387} 388 389void EvalFunc(const vector<Value*>& args, Evaluator* ev, string*) { 390 // TODO: eval leaks everything... for now. 391 //shared_ptr<string> text = args[0]->Eval(ev); 392 string* text = new string; 393 args[0]->Eval(ev, text); 394 vector<AST*> asts; 395 Parse(*text, ev->loc(), &asts); 396 for (AST* ast : asts) { 397 LOG("%s", ast->DebugString().c_str()); 398 ast->Eval(ev); 399 //delete ast; 400 } 401} 402 403void ShellFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 404 shared_ptr<string> cmd = args[0]->Eval(ev); 405 if (ev->avoid_io()) { 406 *s += "$("; 407 *s += *cmd; 408 *s += ")"; 409 return; 410 } 411 412 LOG("ShellFunc: %s", cmd->c_str()); 413 string out; 414 // TODO: Handle $(SHELL). 415 FILE* fp = popen(cmd->c_str(), "r"); 416 while (true) { 417 char buf[4096]; 418 size_t r = fread(buf, 1, 4096, fp); 419 out.append(buf, buf+r); 420 if (r == 0) { 421 fclose(fp); 422 break; 423 } 424 } 425 426 while (out[out.size()-1] == '\n') 427 out.pop_back(); 428 for (size_t i = 0; i < out.size(); i++) { 429 if (out[i] == '\n') 430 out[i] = ' '; 431 } 432 *s += out; 433} 434 435void CallFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 436 static const char* tmpvar_names[] = { 437 "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" 438 }; 439 440 shared_ptr<string> func_name = args[0]->Eval(ev); 441 Var* func = ev->LookupVar(*func_name); 442 vector<unique_ptr<SimpleVar>> av; 443 for (size_t i = 1; i < args.size(); i++) { 444 unique_ptr<SimpleVar> s( 445 new SimpleVar(args[i]->Eval(ev), VarOrigin::AUTOMATIC)); 446 av.push_back(move(s)); 447 } 448 vector<unique_ptr<ScopedVar>> sv; 449 for (size_t i = 1; i < args.size(); i++) { 450 sv.push_back(move(unique_ptr<ScopedVar>( 451 new ScopedVar(ev->mutable_vars(), tmpvar_names[i], av[i-1].get())))); 452 } 453 func->Eval(ev, s); 454} 455 456void ForeachFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 457 shared_ptr<string> varname = args[0]->Eval(ev); 458 shared_ptr<string> list = args[1]->Eval(ev); 459 WordWriter ww(s); 460 for (StringPiece tok : WordScanner(*list)) { 461 unique_ptr<SimpleVar> v(new SimpleVar( 462 make_shared<string>(tok.data(), tok.size()), VarOrigin::AUTOMATIC)); 463 ScopedVar sv(ev->mutable_vars(), *varname, v.get()); 464 ww.MaybeAddWhitespace(); 465 args[2]->Eval(ev, s); 466 } 467} 468 469void OriginFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 470 shared_ptr<string> var_name = args[0]->Eval(ev); 471 Var* var = ev->LookupVar(*var_name); 472 *s += GetOriginStr(var->Origin()); 473} 474 475void FlavorFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 476 shared_ptr<string> var_name = args[0]->Eval(ev); 477 Var* var = ev->LookupVar(*var_name); 478 *s += var->Flavor(); 479} 480 481void InfoFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 482 shared_ptr<string> a = args[0]->Eval(ev); 483 if (ev->avoid_io()) { 484 *s += "KATI_TODO(info)"; 485 return; 486 } 487 printf("%s\n", a->c_str()); 488 fflush(stdout); 489} 490 491void WarningFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 492 shared_ptr<string> a = args[0]->Eval(ev); 493 if (ev->avoid_io()) { 494 *s += "KATI_TODO(warning)"; 495 return; 496 } 497 printf("%s:%d: %s\n", LOCF(ev->loc()), a->c_str()); 498 fflush(stdout); 499} 500 501void ErrorFunc(const vector<Value*>& args, Evaluator* ev, string* s) { 502 shared_ptr<string> a = args[0]->Eval(ev); 503 if (ev->avoid_io()) { 504 *s += "KATI_TODO(error)"; 505 return; 506 } 507 ev->Error(StringPrintf("*** %s.", a->c_str())); 508} 509 510FuncInfo g_func_infos[] = { 511 { "patsubst", &PatsubstFunc, 3, 3, false, false }, 512 { "strip", &StripFunc, 1, 1, false, false }, 513 { "subst", &SubstFunc, 3, 3, false, false }, 514 { "findstring", &FindstringFunc, 2, 2, false, false }, 515 { "filter", &FilterFunc, 2, 2, false, false }, 516 { "filter-out", &FilterOutFunc, 2, 2, false, false }, 517 { "sort", &SortFunc, 1, 1, false, false }, 518 { "word", &WordFunc, 2, 2, false, false }, 519 { "wordlist", &WordlistFunc, 3, 3, false, false }, 520 { "words", &WordsFunc, 1, 1, false, false }, 521 { "firstword", &FirstwordFunc, 1, 1, false, false }, 522 { "lastword", &LastwordFunc, 1, 1, false, false }, 523 524 { "join", &JoinFunc, 2, 2, false, false }, 525 { "wildcard", &WildcardFunc, 1, 1, false, false }, 526 { "dir", &DirFunc, 1, 1, false, false }, 527 { "notdir", &NotdirFunc, 1, 1, false, false }, 528 { "suffix", &SuffixFunc, 1, 1, false, false }, 529 { "basename", &BasenameFunc, 1, 1, false, false }, 530 { "addsuffix", &AddsuffixFunc, 2, 2, false, false }, 531 { "addprefix", &AddprefixFunc, 2, 2, false, false }, 532 { "realpath", &RealpathFunc, 1, 1, false, false }, 533 { "abspath", &AbspathFunc, 1, 1, false, false }, 534 535 { "if", &IfFunc, 3, 2, false, true }, 536 { "and", &AndFunc, 0, 0, true, false }, 537 { "or", &OrFunc, 0, 0, true, false }, 538 539 { "value", &ValueFunc, 1, 1, false, false }, 540 { "eval", &EvalFunc, 1, 1, false, false }, 541 { "shell", &ShellFunc, 1, 1, false, false }, 542 { "call", &CallFunc, 0, 0, false, false }, 543 { "foreach", &ForeachFunc, 3, 3, false, false }, 544 545 { "origin", &OriginFunc, 1, 1, false, false }, 546 { "flavor", &FlavorFunc, 1, 1, false, false }, 547 548 { "info", &InfoFunc, 1, 1, false, false }, 549 { "warning", &WarningFunc, 1, 1, false, false }, 550 { "error", &ErrorFunc, 1, 1, false, false }, 551}; 552 553unordered_map<StringPiece, FuncInfo*>* g_func_info_map; 554 555} // namespace 556 557void InitFuncTable() { 558 g_func_info_map = new unordered_map<StringPiece, FuncInfo*>; 559 for (size_t i = 0; i < sizeof(g_func_infos) / sizeof(g_func_infos[0]); i++) { 560 FuncInfo* fi = &g_func_infos[i]; 561 bool ok = g_func_info_map->insert(make_pair(Intern(fi->name), fi)).second; 562 CHECK(ok); 563 } 564} 565 566void QuitFuncTable() { 567 delete g_func_info_map; 568} 569 570FuncInfo* GetFuncInfo(StringPiece name) { 571 auto found = g_func_info_map->find(name); 572 if (found == g_func_info_map->end()) 573 return NULL; 574 return found->second; 575} 576