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CMake/Source/kwsys/Glob.cxx

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/*============================================================================
KWSys - Kitware System Library
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 "kwsysPrivate.h"
#include KWSYS_HEADER(Glob.hxx)
#include KWSYS_HEADER(Configure.hxx)
#include KWSYS_HEADER(RegularExpression.hxx)
#include KWSYS_HEADER(SystemTools.hxx)
#include KWSYS_HEADER(Directory.hxx)
// Work-around CMake dependency scanning limitation. This must
// duplicate the above list of headers.
#if 0
# include "Glob.hxx.in"
# include "Directory.hxx.in"
# include "Configure.hxx.in"
# include "RegularExpression.hxx.in"
# include "SystemTools.hxx.in"
#endif
#include <string>
#include <vector>
#include <algorithm>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
namespace KWSYS_NAMESPACE
{
#if defined(_WIN32) || defined(__APPLE__) || defined(__CYGWIN__)
// On Windows and apple, no difference between lower and upper case
# define KWSYS_GLOB_CASE_INDEPENDENT
#endif
#if defined(_WIN32) || defined(__CYGWIN__)
// Handle network paths
# define KWSYS_GLOB_SUPPORT_NETWORK_PATHS
#endif
//----------------------------------------------------------------------------
class GlobInternals
{
public:
std::vector<std::string> Files;
std::vector<kwsys::RegularExpression> Expressions;
};
//----------------------------------------------------------------------------
Glob::Glob()
{
this->Internals = new GlobInternals;
this->Recurse = false;
this->Relative = "";
this->RecurseThroughSymlinks = true;
// RecurseThroughSymlinks is true by default for backwards compatibility,
// not because it's a good idea...
this->FollowedSymlinkCount = 0;
// Keep separate variables for directory listing for back compatibility
this->ListDirs = true;
this->RecurseListDirs = false;
}
//----------------------------------------------------------------------------
Glob::~Glob()
{
delete this->Internals;
}
//----------------------------------------------------------------------------
std::vector<std::string>& Glob::GetFiles()
{
return this->Internals->Files;
}
//----------------------------------------------------------------------------
std::string Glob::PatternToRegex(const std::string& pattern,
bool require_whole_string,
bool preserve_case)
{
// Incrementally build the regular expression from the pattern.
std::string regex = require_whole_string? "^" : "";
std::string::const_iterator pattern_first = pattern.begin();
std::string::const_iterator pattern_last = pattern.end();
for(std::string::const_iterator i = pattern_first;
i != pattern_last; ++i)
{
int c = *i;
if(c == '*')
{
// A '*' (not between brackets) matches any string.
// We modify this to not match slashes since the orignal glob
// pattern documentation was meant for matching file name
// components separated by slashes.
regex += "[^/]*";
}
else if(c == '?')
{
// A '?' (not between brackets) matches any single character.
// We modify this to not match slashes since the orignal glob
// pattern documentation was meant for matching file name
// components separated by slashes.
regex += "[^/]";
}
else if(c == '[')
{
// Parse out the bracket expression. It begins just after the
// opening character.
std::string::const_iterator bracket_first = i+1;
std::string::const_iterator bracket_last = bracket_first;
// The first character may be complementation '!' or '^'.
if(bracket_last != pattern_last &&
(*bracket_last == '!' || *bracket_last == '^'))
{
++bracket_last;
}
// If the next character is a ']' it is included in the brackets
// because the bracket string may not be empty.
if(bracket_last != pattern_last && *bracket_last == ']')
{
++bracket_last;
}
// Search for the closing ']'.
while(bracket_last != pattern_last && *bracket_last != ']')
{
++bracket_last;
}
// Check whether we have a complete bracket string.
if(bracket_last == pattern_last)
{
// The bracket string did not end, so it was opened simply by
// a '[' that is supposed to be matched literally.
regex += "\\[";
}
else
{
// Convert the bracket string to its regex equivalent.
std::string::const_iterator k = bracket_first;
// Open the regex block.
regex += "[";
// A regex range complement uses '^' instead of '!'.
if(k != bracket_last && *k == '!')
{
regex += "^";
++k;
}
// Convert the remaining characters.
for(; k != bracket_last; ++k)
{
// Backslashes must be escaped.
if(*k == '\\')
{
regex += "\\";
}
// Store this character.
regex += *k;
}
// Close the regex block.
regex += "]";
// Jump to the end of the bracket string.
i = bracket_last;
}
}
else
{
// A single character matches itself.
int ch = c;
if(!(('a' <= ch && ch <= 'z') ||
('A' <= ch && ch <= 'Z') ||
('0' <= ch && ch <= '9')))
{
// Escape the non-alphanumeric character.
regex += "\\";
}
#if defined(KWSYS_GLOB_CASE_INDEPENDENT)
else
{
// On case-insensitive systems file names are converted to lower
// case before matching.
if(!preserve_case)
{
ch = tolower(ch);
}
}
#endif
(void)preserve_case;
// Store the character.
regex.append(1, static_cast<char>(ch));
}
}
if(require_whole_string)
{
regex += "$";
}
return regex;
}
//----------------------------------------------------------------------------
bool Glob::RecurseDirectory(std::string::size_type start,
const std::string& dir, GlobMessages* messages)
{
kwsys::Directory d;
if ( !d.Load(dir) )
{
return true;
}
unsigned long cc;
std::string realname;
std::string fname;
for ( cc = 0; cc < d.GetNumberOfFiles(); cc ++ )
{
fname = d.GetFile(cc);
if ( fname == "." || fname == ".." )
{
continue;
}
if ( start == 0 )
{
realname = dir + fname;
}
else
{
realname = dir + "/" + fname;
}
#if defined( KWSYS_GLOB_CASE_INDEPENDENT )
// On Windows and apple, no difference between lower and upper case
fname = kwsys::SystemTools::LowerCase(fname);
#endif
bool isDir = kwsys::SystemTools::FileIsDirectory(realname);
bool isSymLink = kwsys::SystemTools::FileIsSymlink(realname);
if ( isDir && (!isSymLink || this->RecurseThroughSymlinks) )
{
if (isSymLink)
{
++this->FollowedSymlinkCount;
std::string realPathErrorMessage;
std::string canonicalPath(SystemTools::GetRealPath(dir,
&realPathErrorMessage));
if(!realPathErrorMessage.empty())
{
if(messages)
{
messages->push_back(Message(
Glob::error, "Canonical path generation from path '"
+ dir + "' failed! Reason: '" + realPathErrorMessage + "'"));
}
return false;
}
if(std::find(this->VisitedSymlinks.begin(),
this->VisitedSymlinks.end(),
canonicalPath) == this->VisitedSymlinks.end())
{
if(this->RecurseListDirs)
{
// symlinks are treated as directories
this->AddFile(this->Internals->Files, realname);
}
this->VisitedSymlinks.push_back(canonicalPath);
if(!this->RecurseDirectory(start+1, realname, messages))
{
this->VisitedSymlinks.pop_back();
return false;
}
this->VisitedSymlinks.pop_back();
}
// else we have already visited this symlink - prevent cyclic recursion
else if(messages)
{
std::string message;
for(std::vector<std::string>::const_iterator
pathIt = std::find(this->VisitedSymlinks.begin(),
this->VisitedSymlinks.end(),
canonicalPath);
pathIt != this->VisitedSymlinks.end(); ++pathIt)
{
message += *pathIt + "\n";
}
message += canonicalPath + "/" + fname;
messages->push_back(Message(Glob::cyclicRecursion, message));
}
}
else
{
if(this->RecurseListDirs)
{
this->AddFile(this->Internals->Files, realname);
}
if(!this->RecurseDirectory(start+1, realname, messages))
{
return false;
}
}
}
else
{
if ( !this->Internals->Expressions.empty() &&
this->Internals->Expressions.rbegin()->find(fname) )
{
this->AddFile(this->Internals->Files, realname);
}
}
}
return true;
}
//----------------------------------------------------------------------------
void Glob::ProcessDirectory(std::string::size_type start,
const std::string& dir, GlobMessages* messages)
{
//std::cout << "ProcessDirectory: " << dir << std::endl;
bool last = ( start == this->Internals->Expressions.size()-1 );
if ( last && this->Recurse )
{
this->RecurseDirectory(start, dir, messages);
return;
}
if ( start >= this->Internals->Expressions.size() )
{
return;
}
kwsys::Directory d;
if ( !d.Load(dir) )
{
return;
}
unsigned long cc;
std::string realname;
std::string fname;
for ( cc = 0; cc < d.GetNumberOfFiles(); cc ++ )
{
fname = d.GetFile(cc);
if ( fname == "." || fname == ".." )
{
continue;
}
if ( start == 0 )
{
realname = dir + fname;
}
else
{
realname = dir + "/" + fname;
}
#if defined(KWSYS_GLOB_CASE_INDEPENDENT)
// On case-insensitive file systems convert to lower case for matching.
fname = kwsys::SystemTools::LowerCase(fname);
#endif
//std::cout << "Look at file: " << fname << std::endl;
//std::cout << "Match: "
// << this->Internals->TextExpressions[start].c_str() << std::endl;
//std::cout << "Real name: " << realname << std::endl;
if( (!last && !kwsys::SystemTools::FileIsDirectory(realname))
|| (!this->ListDirs && last &&
kwsys::SystemTools::FileIsDirectory(realname)) )
{
continue;
}
if ( this->Internals->Expressions[start].find(fname) )
{
if ( last )
{
this->AddFile(this->Internals->Files, realname);
}
else
{
this->ProcessDirectory(start+1, realname, messages);
}
}
}
}
//----------------------------------------------------------------------------
bool Glob::FindFiles(const std::string& inexpr, GlobMessages* messages)
{
std::string cexpr;
std::string::size_type cc;
std::string expr = inexpr;
this->Internals->Expressions.clear();
this->Internals->Files.clear();
if ( !kwsys::SystemTools::FileIsFullPath(expr) )
{
expr = kwsys::SystemTools::GetCurrentWorkingDirectory();
expr += "/" + inexpr;
}
std::string fexpr = expr;
std::string::size_type skip = 0;
std::string::size_type last_slash = 0;
for ( cc = 0; cc < expr.size(); cc ++ )
{
if ( cc > 0 && expr[cc] == '/' && expr[cc-1] != '\\' )
{
last_slash = cc;
}
if ( cc > 0 &&
(expr[cc] == '[' || expr[cc] == '?' || expr[cc] == '*') &&
expr[cc-1] != '\\' )
{
break;
}
}
if ( last_slash > 0 )
{
//std::cout << "I can skip: " << fexpr.substr(0, last_slash)
// << std::endl;
skip = last_slash;
}
if ( skip == 0 )
{
#if defined( KWSYS_GLOB_SUPPORT_NETWORK_PATHS )
// Handle network paths
if ( expr[0] == '/' && expr[1] == '/' )
{
int cnt = 0;
for ( cc = 2; cc < expr.size(); cc ++ )
{
if ( expr[cc] == '/' )
{
cnt ++;
if ( cnt == 2 )
{
break;
}
}
}
skip = int(cc + 1);
}
else
#endif
// Handle drive letters on Windows
if ( expr[1] == ':' && expr[0] != '/' )
{
skip = 2;
}
}
if ( skip > 0 )
{
expr = expr.substr(skip);
}
cexpr = "";
for ( cc = 0; cc < expr.size(); cc ++ )
{
int ch = expr[cc];
if ( ch == '/' )
{
if ( !cexpr.empty() )
{
this->AddExpression(cexpr);
}
cexpr = "";
}
else
{
cexpr.append(1, static_cast<char>(ch));
}
}
if ( !cexpr.empty() )
{
this->AddExpression(cexpr);
}
// Handle network paths
if ( skip > 0 )
{
this->ProcessDirectory(0, fexpr.substr(0, skip) + "/", messages);
}
else
{
this->ProcessDirectory(0, "/", messages);
}
return true;
}
//----------------------------------------------------------------------------
void Glob::AddExpression(const std::string& expr)
{
this->Internals->Expressions.push_back(
kwsys::RegularExpression(
this->PatternToRegex(expr)));
}
//----------------------------------------------------------------------------
void Glob::SetRelative(const char* dir)
{
if ( !dir )
{
this->Relative = "";
return;
}
this->Relative = dir;
}
//----------------------------------------------------------------------------
const char* Glob::GetRelative()
{
if ( this->Relative.empty() )
{
return 0;
}
return this->Relative.c_str();
}
//----------------------------------------------------------------------------
void Glob::AddFile(std::vector<std::string>& files, const std::string& file)
{
if ( !this->Relative.empty() )
{
files.push_back(kwsys::SystemTools::RelativePath(this->Relative, file));
}
else
{
files.push_back(file);
}
}
} // namespace KWSYS_NAMESPACE
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