\section{Standard Module \module{mailcap}} \declaremodule{standard}{mailcap} \modulesynopsis{Mailcap file handling.} Mailcap files are used to configure how MIME-aware applications such as mail readers and Web browsers react to files with different MIME types. (The name ``mailcap'' is derived from the phrase ``mail capability''.) For example, a mailcap file might contain a line like \samp{video/mpeg; xmpeg \%s}. Then, if the user encounters an email message or Web document with the MIME type \mimetype{video/mpeg}, \samp{\%s} will be replaced by a filename (usually one belonging to a temporary file) and the \program{xmpeg} program can be automatically started to view the file. The mailcap format is documented in \rfc{1524}, ``A User Agent Configuration Mechanism For Multimedia Mail Format Information,'' but is not an Internet standard. However, mailcap files are supported on most \UNIX{} systems. \begin{funcdesc}{findmatch}{caps, MIMEtype% \optional{, key\optional{, filename\optional{, plist}}}} Return a 2-tuple; the first element is a string containing the command line to be executed (which can be passed to \code{os.system()}), and the second element is the mailcap entry for a given MIME type. If no matching MIME type can be found, \code{(None, None)} is returned. \var{key} is the name of the field desired, which represents the type of activity to be performed; the default value is 'view', since in the most common case you simply want to view the body of the MIME-typed data. Other possible values might be 'compose' and 'edit', if you wanted to create a new body of the given MIME type or alter the existing body data. See \rfc{1524} for a complete list of these fields. \var{filename} is the filename to be substituted for \samp{\%s} in the command line; the default value is \code{'/dev/null'} which is almost certainly not what you want, so usually you'll override it by specifying a filename. \var{plist} can be a list containing named parameters; the default value is simply an empty list. Each entry in the list must be a string containing the parameter name, an equals sign (\code{=}), and the parameter's value. Mailcap entries can contain named parameters like \code{\%\{foo\}}, which will be replaced by the value of the parameter named 'foo'. For example, if the command line \samp{showpartial \%\{id\}\ \%\{number\}\ \%\{total\}} was in a mailcap file, and \var{plist} was set to \code{['id=1', 'number=2', 'total=3']}, the resulting command line would be \code{"showpartial 1 2 3"}. In a mailcap file, the "test" field can optionally be specified to test some external condition (e.g., the machine architecture, or the window system in use) to determine whether or not the mailcap line applies. \code{findmatch()} will automatically check such conditions and skip the entry if the check fails. \end{funcdesc} \begin{funcdesc}{getcaps}{} Returns a dictionary mapping MIME types to a list of mailcap file entries. This dictionary must be passed to the \code{findmatch()} function. An entry is stored as a list of dictionaries, but it shouldn't be necessary to know the details of this representation. The information is derived from all of the mailcap files found on the system. Settings in the user's mailcap file \file{\$HOME/.mailcap} will override settings in the system mailcap files \file{/etc/mailcap}, \file{/usr/etc/mailcap}, and \file{/usr/local/etc/mailcap}. \end{funcdesc} An example usage: \begin{verbatim} >>> import mailcap >>> d=mailcap.getcaps() >>> mailcap.findmatch(d, 'video/mpeg', filename='/tmp/tmp1223') ('xmpeg /tmp/tmp1223', {'view': 'xmpeg %s'}) \end{verbatim} 'n20' href='#n20'>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

/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmListCommand.h"
#include <cmsys/RegularExpression.hxx>
#include <cmsys/SystemTools.hxx>

#include <stdlib.h> // required for atoi
#include <ctype.h>
#include <assert.h>
//----------------------------------------------------------------------------
bool cmListCommand
::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
{
  if(args.size() < 2)
    {
    this->SetError("must be called with at least two arguments.");
    return false;
    }

  const std::string &subCommand = args[0];
  if(subCommand == "LENGTH")
    {
    return this->HandleLengthCommand(args);
    }
  if(subCommand == "GET")
    {
    return this->HandleGetCommand(args);
    }
  if(subCommand == "APPEND")
    {
    return this->HandleAppendCommand(args);
    }
  if(subCommand == "FIND")
    {
    return this->HandleFindCommand(args);
    }
  if(subCommand == "INSERT")
    {
    return this->HandleInsertCommand(args);
    }
  if(subCommand == "REMOVE_AT")
    {
    return this->HandleRemoveAtCommand(args);
    }
  if(subCommand == "REMOVE_ITEM")
    {
    return this->HandleRemoveItemCommand(args);
    }
  if(subCommand == "REMOVE_DUPLICATES")
    {
    return this->HandleRemoveDuplicatesCommand(args);
    }
  if(subCommand == "SORT")
    {
    return this->HandleSortCommand(args);
    }
  if(subCommand == "REVERSE")
    {
    return this->HandleReverseCommand(args);
    }

  std::string e = "does not recognize sub-command "+subCommand;
  this->SetError(e.c_str());
  return false;
}

//----------------------------------------------------------------------------
bool cmListCommand::GetListString(std::string& listString, const char* var)
{
  if ( !var )
    {
    return false;
    }
  // get the old value
  const char* cacheValue
    = this->Makefile->GetDefinition(var);
  if(!cacheValue)
    {
    return false;
    }
  listString = cacheValue;
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand::GetList(std::vector<std::string>& list, const char* var)
{
  std::string listString;
  if ( !this->GetListString(listString, var) )
    {
    return false;
    }
  // if the size of the list
  if(listString.size() == 0)
    {
    return true;
    }
  // expand the variable into a list
  cmSystemTools::ExpandListArgument(listString, list, true);
  // check the list for empty values
  bool hasEmpty = false;
  for(std::vector<std::string>::iterator i = list.begin();
      i != list.end(); ++i)
    {
    if(i->size() == 0)
      {
      hasEmpty = true;
      break;
      }
    }
  // if no empty elements then just return
  if(!hasEmpty)
    {
    return true;
    }
  // if we have empty elements we need to check policy CMP0007
  switch(this->Makefile->GetPolicyStatus(cmPolicies::CMP0007))
    {
    case cmPolicies::WARN:
      {
      // Default is to warn and use old behavior
      // OLD behavior is to allow compatibility, so recall
      // ExpandListArgument without the true which will remove
      // empty values
      list.clear();
      cmSystemTools::ExpandListArgument(listString, list);
      std::string warn = this->Makefile->GetPolicies()->
        GetPolicyWarning(cmPolicies::CMP0007);
      warn += " List has value = [";
      warn += listString;
      warn += "].";
      this->Makefile->IssueMessage(cmake::AUTHOR_WARNING,
                                   warn);
      return true;
      }
    case cmPolicies::OLD:
      // OLD behavior is to allow compatibility, so recall
      // ExpandListArgument without the true which will remove
      // empty values
      list.clear();
      cmSystemTools::ExpandListArgument(listString, list);
      return true;
    case cmPolicies::NEW:
      return true;
    case cmPolicies::REQUIRED_IF_USED:
    case cmPolicies::REQUIRED_ALWAYS:
      this->Makefile->IssueMessage(
        cmake::FATAL_ERROR,
        this->Makefile->GetPolicies()
        ->GetRequiredPolicyError(cmPolicies::CMP0007)
        );
      return false;
    }
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand::HandleLengthCommand(std::vector<std::string> const& args)
{
  if(args.size() != 3)
    {
    this->SetError("sub-command LENGTH requires two arguments.");
    return false;
    }

  const std::string& listName = args[1];
  const std::string& variableName = args[args.size() - 1];
  std::vector<std::string> varArgsExpanded;
  // do not check the return value here
  // if the list var is not found varArgsExpanded will have size 0
  // and we will return 0
  this->GetList(varArgsExpanded, listName.c_str());
  size_t length = varArgsExpanded.size();
  char buffer[1024];
  sprintf(buffer, "%d", static_cast<int>(length));

  this->Makefile->AddDefinition(variableName.c_str(), buffer);
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand::HandleGetCommand(std::vector<std::string> const& args)
{
  if(args.size() < 4)
    {
    this->SetError("sub-command GET requires at least three arguments.");
    return false;
    }

  const std::string& listName = args[1];
  const std::string& variableName = args[args.size() - 1];
  // expand the variable
  std::vector<std::string> varArgsExpanded;
  if ( !this->GetList(varArgsExpanded, listName.c_str()) )
    {
    this->Makefile->AddDefinition(variableName.c_str(), "NOTFOUND");
    return true;
    }
  // FIXME: Add policy to make non-existing lists an error like empty lists.
  if(varArgsExpanded.empty())
    {
    this->SetError("GET given empty list");
    return false;
    }

  std::string value;
  size_t cc;
  const char* sep = "";
  for ( cc = 2; cc < args.size()-1; cc ++ )
    {
    int item = atoi(args[cc].c_str());
    value += sep;
    sep = ";";
    size_t nitem = varArgsExpanded.size();
    if ( item < 0 )
      {
      item = (int)nitem + item;
      }
    if ( item < 0 || nitem <= (size_t)item )
      {
      cmOStringStream str;
      str << "index: " << item << " out of range (-"
          << varArgsExpanded.size() << ", "
          << varArgsExpanded.size()-1 << ")";
      this->SetError(str.str().c_str());
      return false;
      }
    value += varArgsExpanded[item];
    }

  this->Makefile->AddDefinition(variableName.c_str(), value.c_str());
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand::HandleAppendCommand(std::vector<std::string> const& args)
{
  assert(args.size() >= 2);

  // Skip if nothing to append.
  if(args.size() < 3)
    {
    return true;
    }

  const std::string& listName = args[1];
  // expand the variable
  std::string listString;
  this->GetListString(listString, listName.c_str());
  size_t cc;
  for ( cc = 2; cc < args.size(); ++ cc )
    {
    if(listString.size())
      {
      listString += ";";
      }
    listString += args[cc];
    }

  this->Makefile->AddDefinition(listName.c_str(), listString.c_str());
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand::HandleFindCommand(std::vector<std::string> const& args)
{
  if(args.size() != 4)
    {
    this->SetError("sub-command FIND requires three arguments.");
    return false;
    }

  const std::string& listName = args[1];
  const std::string& variableName = args[args.size() - 1];
  // expand the variable
  std::vector<std::string> varArgsExpanded;
  if ( !this->GetList(varArgsExpanded, listName.c_str()) )
    {
    this->Makefile->AddDefinition(variableName.c_str(), "-1");
    return true;
    }

  std::vector<std::string>::iterator it;
  unsigned int index = 0;
  for ( it = varArgsExpanded.begin(); it != varArgsExpanded.end(); ++ it )
    {
    if ( *it == args[2] )
      {
      char indexString[32];
      sprintf(indexString, "%d", index);
      this->Makefile->AddDefinition(variableName.c_str(), indexString);
      return true;
      }
    index++;
    }

  this->Makefile->AddDefinition(variableName.c_str(), "-1");
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand::HandleInsertCommand(std::vector<std::string> const& args)
{
  if(args.size() < 4)
    {
    this->SetError("sub-command INSERT requires at least three arguments.");
    return false;
    }

  const std::string& listName = args[1];

  // expand the variable
  int item = atoi(args[2].c_str());
  std::vector<std::string> varArgsExpanded;
  if((!this->GetList(varArgsExpanded, listName.c_str())
      || varArgsExpanded.empty()) && item != 0)
    {
    cmOStringStream str;
    str << "index: " << item << " out of range (0, 0)";
    this->SetError(str.str().c_str());
    return false;
    }

  if ( varArgsExpanded.size() != 0 )
    {
    size_t nitem = varArgsExpanded.size();
    if ( item < 0 )
      {
      item = (int)nitem + item;
      }
    if ( item < 0 || nitem <= (size_t)item )
      {
      cmOStringStream str;
      str << "index: " << item << " out of range (-"
        << varArgsExpanded.size() << ", "
        << (varArgsExpanded.size() == 0?0:(varArgsExpanded.size()-1)) << ")";
      this->SetError(str.str().c_str());
      return false;
      }
    }
  size_t cc;
  size_t cnt = 0;
  for ( cc = 3; cc < args.size(); ++ cc )
    {
    varArgsExpanded.insert(varArgsExpanded.begin()+item+cnt, args[cc]);
    cnt ++;
    }

  std::string value;
  const char* sep = "";
  for ( cc = 0; cc < varArgsExpanded.size(); cc ++ )
    {
    value += sep;
    value += varArgsExpanded[cc];
    sep = ";";
    }

  this->Makefile->AddDefinition(listName.c_str(), value.c_str());
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand
::HandleRemoveItemCommand(std::vector<std::string> const& args)
{
  if(args.size() < 3)
    {
    this->SetError("sub-command REMOVE_ITEM requires two or more arguments.");
    return false;
    }

  const std::string& listName = args[1];
  // expand the variable
  std::vector<std::string> varArgsExpanded;
  if ( !this->GetList(varArgsExpanded, listName.c_str()) )
    {
    this->SetError("sub-command REMOVE_ITEM requires list to be present.");
    return false;
    }

  size_t cc;
  for ( cc = 2; cc < args.size(); ++ cc )
    {
    size_t kk = 0;
    while ( kk < varArgsExpanded.size() )
      {
      if ( varArgsExpanded[kk] == args[cc] )
        {
        varArgsExpanded.erase(varArgsExpanded.begin()+kk);
        }
      else
        {
        kk ++;
        }
      }
    }

  std::string value;
  const char* sep = "";
  for ( cc = 0; cc < varArgsExpanded.size(); cc ++ )
    {
    value += sep;
    value += varArgsExpanded[cc];
    sep = ";";
    }

  this->Makefile->AddDefinition(listName.c_str(), value.c_str());
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand
::HandleReverseCommand(std::vector<std::string> const& args)
{
  assert(args.size() >= 2);
  if(args.size() > 2)
    {
    this->SetError(
      "sub-command REVERSE only takes one argument.");
    return false;
    }

  const std::string& listName = args[1];
  // expand the variable
  std::vector<std::string> varArgsExpanded;
  if ( !this->GetList(varArgsExpanded, listName.c_str()) )
    {
    this->SetError("sub-command REVERSE requires list to be present.");
    return false;
    }

  std::string value;
  std::vector<std::string>::reverse_iterator it;
  const char* sep = "";
  for ( it = varArgsExpanded.rbegin(); it != varArgsExpanded.rend(); ++ it )
    {
    value += sep;
    value += it->c_str();
    sep = ";";
    }

  this->Makefile->AddDefinition(listName.c_str(), value.c_str());
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand
::HandleRemoveDuplicatesCommand(std::vector<std::string> const& args)
{
  assert(args.size() >= 2);
  if(args.size() > 2)
    {
    this->SetError(
      "sub-command REMOVE_DUPLICATES only takes one argument.");
    return false;
    }

  const std::string& listName = args[1];
  // expand the variable
  std::vector<std::string> varArgsExpanded;
  if ( !this->GetList(varArgsExpanded, listName.c_str()) )
    {
    this->SetError(
      "sub-command REMOVE_DUPLICATES requires list to be present.");
    return false;
    }

  std::string value;


  std::set<std::string> unique;
  std::vector<std::string>::iterator it;
  const char* sep = "";
  for ( it = varArgsExpanded.begin(); it != varArgsExpanded.end(); ++ it )
    {
    if (unique.find(*it) != unique.end())
      {
      continue;
      }
    unique.insert(*it);
    value += sep;
    value += it->c_str();
    sep = ";";
    }


  this->Makefile->AddDefinition(listName.c_str(), value.c_str());
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand
::HandleSortCommand(std::vector<std::string> const& args)
{
  assert(args.size() >= 2);
  if(args.size() > 2)
    {
    this->SetError(
      "sub-command SORT only takes one argument.");
    return false;
    }

  const std::string& listName = args[1];
  // expand the variable
  std::vector<std::string> varArgsExpanded;
  if ( !this->GetList(varArgsExpanded, listName.c_str()) )
    {
    this->SetError("sub-command SORT requires list to be present.");
    return false;
    }

  std::sort(varArgsExpanded.begin(), varArgsExpanded.end());

  std::string value;
  std::vector<std::string>::iterator it;
  const char* sep = "";
  for ( it = varArgsExpanded.begin(); it != varArgsExpanded.end(); ++ it )
    {
    value += sep;
    value += it->c_str();
    sep = ";";
    }

  this->Makefile->AddDefinition(listName.c_str(), value.c_str());
  return true;
}

//----------------------------------------------------------------------------
bool cmListCommand::HandleRemoveAtCommand(
  std::vector<std::string> const& args)
{
  if(args.size() < 3)
    {
    this->SetError("sub-command REMOVE_AT requires at least "
                   "two arguments.");
    return false;
    }

  const std::string& listName = args[1];
  // expand the variable
  std::vector<std::string> varArgsExpanded;
  if ( !this->GetList(varArgsExpanded, listName.c_str()) )
    {
    this->SetError("sub-command REMOVE_AT requires list to be present.");
    return false;
    }
  // FIXME: Add policy to make non-existing lists an error like empty lists.
  if(varArgsExpanded.empty())
    {
    this->SetError("REMOVE_AT given empty list");
    return false;
    }

  size_t cc;
  std::vector<size_t> removed;
  for ( cc = 2; cc < args.size(); ++ cc )
    {
    int item = atoi(args[cc].c_str());
    size_t nitem = varArgsExpanded.size();
    if ( item < 0 )
      {
      item = (int)nitem + item;
      }
    if ( item < 0 || nitem <= (size_t)item )
      {
      cmOStringStream str;
      str << "index: " << item << " out of range (-"
          << varArgsExpanded.size() << ", "
          << varArgsExpanded.size()-1 << ")";
      this->SetError(str.str().c_str());
      return false;
      }
    removed.push_back(static_cast<size_t>(item));
    }

  std::string value;
  const char* sep = "";
  for ( cc = 0; cc < varArgsExpanded.size(); ++ cc )
    {
    size_t kk;
    bool found = false;
    for ( kk = 0; kk < removed.size(); ++ kk )
      {
      if ( cc == removed[kk] )
        {
        found = true;
        }
      }

    if ( !found )
      {
      value += sep;
      value += varArgsExpanded[cc];
      sep = ";";
      }
    }

  this->Makefile->AddDefinition(listName.c_str(), value.c_str());
  return true;
}