summaryrefslogtreecommitdiffstats
path: root/Source/cmWhileCommand.cxx
blob: 4b7afd87a51c41c144ed4ae979948c192036e115 (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
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
/*============================================================================
  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 "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.
      cmsys::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;

      cmListFileContext conditionContext =
          cmConditionEvaluator::GetConditionContext(
            &mf, commandContext,
            this->GetStartingContext().FilePath);

      cmConditionEvaluator conditionEvaluator(
            mf, conditionContext,
            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;
      }
    else
      {
      // 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.size() < 1)
    {
    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;
}