summaryrefslogtreecommitdiff
path: root/Source/cmWhileCommand.cxx
blob: c52ea403b07a3f74b96ff4ccff19ff243d4b8083 (plain)
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
/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#include "cmWhileCommand.h"

#include "cmConditionEvaluator.h"

cmWhileFunctionBlocker::cmWhileFunctionBlocker(cmMakefile* mf)
  : Makefile(mf)
  , Depth(0)
{
  this->Makefile->PushLoopBlock();
}

cmWhileFunctionBlocker::~cmWhileFunctionBlocker()
{
  this->Makefile->PopLoopBlock();
}

bool cmWhileFunctionBlocker::IsFunctionBlocked(const cmListFileFunction& lff,
                                               cmMakefile& mf,
                                               cmExecutionStatus& inStatus)
{
  // at end of for each execute recorded commands
  if (!cmSystemTools::Strucmp(lff.Name.c_str(), "while")) {
    // record the number of while commands past this one
    this->Depth++;
  } else if (!cmSystemTools::Strucmp(lff.Name.c_str(), "endwhile")) {
    // if this is the endwhile for this while loop then execute
    if (!this->Depth) {
      // Remove the function blocker for this scope or bail.
      CM_AUTO_PTR<cmFunctionBlocker> fb(mf.RemoveFunctionBlocker(this, lff));
      if (!fb.get()) {
        return false;
      }

      std::string errorString;

      std::vector<cmExpandedCommandArgument> expandedArguments;
      mf.ExpandArguments(this->Args, expandedArguments);
      cmake::MessageType messageType;

      cmListFileContext execContext = this->GetStartingContext();

      cmCommandContext commandContext;
      commandContext.Line = execContext.Line;
      commandContext.Name = execContext.Name;

      cmConditionEvaluator conditionEvaluator(mf, this->GetStartingContext(),
                                              mf.GetBacktrace(commandContext));

      bool isTrue =
        conditionEvaluator.IsTrue(expandedArguments, errorString, messageType);

      while (isTrue) {
        if (!errorString.empty()) {
          std::string err = "had incorrect arguments: ";
          unsigned int i;
          for (i = 0; i < this->Args.size(); ++i) {
            err += (this->Args[i].Delim ? "\"" : "");
            err += this->Args[i].Value;
            err += (this->Args[i].Delim ? "\"" : "");
            err += " ";
          }
          err += "(";
          err += errorString;
          err += ").";
          mf.IssueMessage(messageType, err);
          if (messageType == cmake::FATAL_ERROR) {
            cmSystemTools::SetFatalErrorOccured();
            return true;
          }
        }

        // Invoke all the functions that were collected in the block.
        for (unsigned int c = 0; c < this->Functions.size(); ++c) {
          cmExecutionStatus status;
          mf.ExecuteCommand(this->Functions[c], status);
          if (status.GetReturnInvoked()) {
            inStatus.SetReturnInvoked(true);
            return true;
          }
          if (status.GetBreakInvoked()) {
            return true;
          }
          if (status.GetContinueInvoked()) {
            break;
          }
          if (cmSystemTools::GetFatalErrorOccured()) {
            return true;
          }
        }
        expandedArguments.clear();
        mf.ExpandArguments(this->Args, expandedArguments);
        isTrue = conditionEvaluator.IsTrue(expandedArguments, errorString,
                                           messageType);
      }
      return true;
    }
    // decrement for each nested while that ends
    this->Depth--;
  }

  // record the command
  this->Functions.push_back(lff);

  // always return true
  return true;
}

bool cmWhileFunctionBlocker::ShouldRemove(const cmListFileFunction& lff,
                                          cmMakefile&)
{
  if (!cmSystemTools::Strucmp(lff.Name.c_str(), "endwhile")) {
    // if the endwhile has arguments, then make sure
    // they match the arguments of the matching while
    if (lff.Arguments.empty() || lff.Arguments == this->Args) {
      return true;
    }
  }
  return false;
}

bool cmWhileCommand::InvokeInitialPass(
  const std::vector<cmListFileArgument>& args, cmExecutionStatus&)
{
  if (args.empty()) {
    this->SetError("called with incorrect number of arguments");
    return false;
  }

  // create a function blocker
  cmWhileFunctionBlocker* f = new cmWhileFunctionBlocker(this->Makefile);
  f->Args = args;
  this->Makefile->AddFunctionBlocker(f);

  return true;
}