summaryrefslogtreecommitdiffstats
path: root/Source/cmFunctionCommand.cxx
blob: c883ad74371f984a7a99a45f68d8b5356c70aaa8 (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
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
/*============================================================================
  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 "cmFunctionCommand.h"

#include "cmake.h"

// define the class for function commands
class cmFunctionHelperCommand : public cmCommand
{
public:
  cmFunctionHelperCommand() {}

  ///! clean up any memory allocated by the function
  ~cmFunctionHelperCommand() {}

  /**
   * This is used to avoid including this command
   * in documentation. This is mainly used by
   * cmMacroHelperCommand and cmFunctionHelperCommand
   * which cannot provide appropriate documentation.
   */
  virtual bool ShouldAppearInDocumentation() const
    {
    return false;
    }

  /**
   * This is a virtual constructor for the command.
   */
  virtual cmCommand* Clone()
  {
    cmFunctionHelperCommand *newC = new cmFunctionHelperCommand;
    // we must copy when we clone
    newC->Args = this->Args;
    newC->Functions = this->Functions;
    newC->Policies = this->Policies;
    newC->FilePath = this->FilePath;
    return newC;
  }

  /**
   * This determines if the command is invoked when in script mode.
   */
  virtual bool IsScriptable() const { return true; }

  /**
   * This is called when the command is first encountered in
   * the CMakeLists.txt file.
   */
  virtual bool InvokeInitialPass(const std::vector<cmListFileArgument>& args,
                                 cmExecutionStatus &);

  virtual bool InitialPass(std::vector<std::string> const&,
                           cmExecutionStatus &) { return false; }

  /**
   * The name of the command as specified in CMakeList.txt.
   */
  virtual std::string GetName() const { return this->Args[0]; }

  cmTypeMacro(cmFunctionHelperCommand, cmCommand);

  std::vector<std::string> Args;
  std::vector<cmListFileFunction> Functions;
  cmPolicies::PolicyMap Policies;
  std::string FilePath;
};

bool cmFunctionHelperCommand::InvokeInitialPass
(const std::vector<cmListFileArgument>& args,
 cmExecutionStatus & inStatus)
{
  // Expand the argument list to the function.
  std::vector<std::string> expandedArgs;
  this->Makefile->ExpandArguments(args, expandedArgs);

  // make sure the number of arguments passed is at least the number
  // required by the signature
  if (expandedArgs.size() < this->Args.size() - 1)
    {
    std::string errorMsg =
      "Function invoked with incorrect arguments for function named: ";
    errorMsg += this->Args[0];
    this->SetError(errorMsg);
    return false;
    }

  cmMakefile::FunctionPushPop functionScope(this->Makefile,
                                            this->FilePath,
                                            this->Policies);

  // set the value of argc
  std::ostringstream strStream;
  strStream << expandedArgs.size();
  this->Makefile->AddDefinition("ARGC",strStream.str().c_str());
  this->Makefile->MarkVariableAsUsed("ARGC");

  // set the values for ARGV0 ARGV1 ...
  for (unsigned int t = 0; t < expandedArgs.size(); ++t)
    {
    std::ostringstream tmpStream;
    tmpStream << "ARGV" << t;
    this->Makefile->AddDefinition(tmpStream.str(),
                                  expandedArgs[t].c_str());
    this->Makefile->MarkVariableAsUsed(tmpStream.str());
    }

  // define the formal arguments
  for (unsigned int j = 1; j < this->Args.size(); ++j)
    {
    this->Makefile->AddDefinition(this->Args[j],
                                  expandedArgs[j-1].c_str());
    }

  // define ARGV and ARGN
  std::string argvDef = cmJoin(expandedArgs, ";");
  std::vector<std::string>::const_iterator eit
      = expandedArgs.begin() + (this->Args.size()-1);
  std::string argnDef = cmJoin(cmMakeRange(eit, expandedArgs.end()), ";");
  this->Makefile->AddDefinition("ARGV", argvDef.c_str());
  this->Makefile->MarkVariableAsUsed("ARGV");
  this->Makefile->AddDefinition("ARGN", argnDef.c_str());
  this->Makefile->MarkVariableAsUsed("ARGN");

  // Invoke all the functions that were collected in the block.
  // for each function
  for(unsigned int c = 0; c < this->Functions.size(); ++c)
    {
    cmExecutionStatus status;
    if (!this->Makefile->ExecuteCommand(this->Functions[c],status) ||
        status.GetNestedError())
      {
      // The error message should have already included the call stack
      // so we do not need to report an error here.
      functionScope.Quiet();
      inStatus.SetNestedError(true);
      return false;
      }
    if (status.GetReturnInvoked())
      {
      return true;
      }
    }

  // pop scope on the makefile
  return true;
}

bool cmFunctionFunctionBlocker::
IsFunctionBlocked(const cmListFileFunction& lff, cmMakefile &mf,
                  cmExecutionStatus &)
{
  // record commands until we hit the ENDFUNCTION
  // at the ENDFUNCTION call we shift gears and start looking for invocations
  if(!cmSystemTools::Strucmp(lff.Name.c_str(),"function"))
    {
    this->Depth++;
    }
  else if(!cmSystemTools::Strucmp(lff.Name.c_str(),"endfunction"))
    {
    // if this is the endfunction for this function then execute
    if (!this->Depth)
      {
      // create a new command and add it to cmake
      cmFunctionHelperCommand *f = new cmFunctionHelperCommand();
      f->Args = this->Args;
      f->Functions = this->Functions;
      f->FilePath = this->GetStartingContext().FilePath;
      mf.RecordPolicies(f->Policies);

      std::string newName = "_" + this->Args[0];
      mf.GetState()->RenameCommand(this->Args[0], newName);
      mf.GetState()->AddCommand(f);

      // remove the function blocker now that the function is defined
      mf.RemoveFunctionBlocker(this, lff);
      return true;
      }
    else
      {
      // decrement for each nested function that ends
      this->Depth--;
      }
    }

  // if it wasn't an endfunction and we are not executing then we must be
  // recording
  this->Functions.push_back(lff);
  return true;
}


bool cmFunctionFunctionBlocker::
ShouldRemove(const cmListFileFunction& lff, cmMakefile &mf)
{
  if(!cmSystemTools::Strucmp(lff.Name.c_str(),"endfunction"))
    {
    std::vector<std::string> expandedArguments;
    mf.ExpandArguments(lff.Arguments, expandedArguments,
                       this->GetStartingContext().FilePath.c_str());
    // if the endfunction has arguments then make sure
    // they match the ones in the opening function command
    if ((expandedArguments.empty() ||
         (expandedArguments[0] == this->Args[0])))
      {
      return true;
      }
    }

  return false;
}

bool cmFunctionCommand
::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
{
  if(args.size() < 1)
    {
    this->SetError("called with incorrect number of arguments");
    return false;
    }

  // create a function blocker
  cmFunctionFunctionBlocker *f = new cmFunctionFunctionBlocker();
  f->Args.insert(f->Args.end(), args.begin(), args.end());
  this->Makefile->AddFunctionBlocker(f);
  return true;
}