CMake/Source/cmSystemTools.cxx

505 lines
11 KiB
C++

/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2000 National Library of Medicine
All rights reserved.
See COPYRIGHT.txt for copyright details.
=========================================================================*/
#include "cmSystemTools.h"
#include "errno.h"
#include "stdio.h"
#include <sys/stat.h>
#include "cmRegularExpression.h"
#if defined(_MSC_VER) || defined(__BORLANDC__)
#include <windows.h>
#include <direct.h>
#define _unlink unlink
inline int Mkdir(const char* dir)
{
return _mkdir(dir);
}
#else
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
inline int Mkdir(const char* dir)
{
return mkdir(dir, 00777);
}
#endif
bool cmSystemTools::s_ErrorOccured = false;
// adds the elements of the env variable path to the arg passed in
void cmSystemTools::GetPath(std::vector<std::string>& path)
{
#if defined(_WIN32) && !defined(__CYGWIN__)
char* pathSep = ";";
#else
char* pathSep = ":";
#endif
std::string pathEnv = getenv("PATH");
std::string::size_type start =0;
bool done = false;
while(!done)
{
std::string::size_type endpos = pathEnv.find(pathSep, start);
if(endpos != std::string::npos)
{
path.push_back(pathEnv.substr(start, endpos-start));
start = endpos+1;
}
else
{
done = true;
}
}
}
const char* cmSystemTools::GetExecutableExtension()
{
#if defined(_WIN32)
return ".exe";
#else
return "";
#endif
}
bool cmSystemTools::MakeDirectory(const char* path)
{
std::string dir = path;
// replace all of the \ with /
size_t pos = 0;
while((pos = dir.find('\\', pos)) != std::string::npos)
{
dir[pos] = '/';
pos++;
}
pos = dir.find(':');
if(pos == std::string::npos)
{
pos = 0;
}
while((pos = dir.find('/', pos)) != std::string::npos)
{
std::string topdir = dir.substr(0, pos);
Mkdir(topdir.c_str());
pos++;
}
if(Mkdir(path) != 0)
{
// if it is some other error besides directory exists
// then return false
if(errno != EEXIST)
{
return false;
}
}
return true;
}
// replace replace with with as many times as it shows up in source.
// write the result into source.
void cmSystemTools::ReplaceString(std::string& source,
const char* replace,
const char* with)
{
int lengthReplace = strlen(replace);
std::string rest;
size_t start = source.find(replace);
while(start != std::string::npos)
{
rest = source.substr(start+lengthReplace);
source = source.substr(0, start);
source += with;
source += rest;
start = source.find(replace, start + lengthReplace );
}
}
std::string cmSystemTools::EscapeSpaces(const char* str)
{
std::string result = "";
for(const char* ch = str; *ch != '\0'; ++ch)
{
if(*ch == ' ')
{
result += '\\';
}
result += *ch;
}
return result;
}
// return true if the file exists
bool cmSystemTools::FileExists(const char* filename)
{
struct stat fs;
if (stat(filename, &fs) != 0)
{
return false;
}
else
{
return true;
}
}
// convert windows slashes to unix slashes \ with /
void cmSystemTools::ConvertToUnixSlashes(std::string& path)
{
std::string::size_type pos = path.find('\\');
while(pos != std::string::npos)
{
path[pos] = '/';
pos = path.find('\\');
}
// remove any trailing slash
if(path[path.size()-1] == '/')
{
path = path.substr(0, path.size()-1);
}
}
int cmSystemTools::Grep(const char* dir, const char* file,
const char* expression)
{
std::string path = dir;
path += "/";
path += file;
std::ifstream fin(path.c_str());
char buffer[2056];
int count = 0;
cmRegularExpression reg(expression);
while(fin)
{
fin.getline(buffer, sizeof(buffer));
count += reg.find(buffer);
}
return count;
}
void cmSystemTools::ConvertCygwinPath(std::string& pathname)
{
if(pathname.find("/cygdrive/") != std::string::npos)
{
std::string cygStuff = pathname.substr(0, 11);
std::string replace;
replace += cygStuff.at(10);
replace += ":";
cmSystemTools::ReplaceString(pathname, cygStuff.c_str(), replace.c_str());
}
}
bool cmSystemTools::ParseFunction(std::ifstream& fin,
std::string& name,
std::vector<std::string>& arguments)
{
name = "";
arguments = std::vector<std::string>();
const int BUFFER_SIZE = 4096;
char inbuffer[BUFFER_SIZE];
if(!fin)
{
return false;
}
if(fin.getline(inbuffer, BUFFER_SIZE ) )
{
cmRegularExpression blankLine("^[ \t]*$");
cmRegularExpression comment("^[ \t]*#.*$");
cmRegularExpression oneLiner("^[ \t]*([A-Za-z_0-9]*)[ \t]*\\((.*)\\)[ \t]*$");
cmRegularExpression multiLine("^[ \t]*([A-Za-z_0-9]*)[ \t]*\\((.*)$");
cmRegularExpression lastLine("^(.*)\\)[ \t]*$");
// BEGIN VERBATIM JUNK SHOULD BE REMOVED
cmRegularExpression verbatim("BEGIN MAKE VERBATIM");
if(verbatim.find(inbuffer))
{
cmRegularExpression endVerbatim("END MAKE VERBATIM");
name = "VERBATIM";
bool done = false;
while(!done)
{
if(fin.getline(inbuffer, BUFFER_SIZE))
{
if(endVerbatim.find(inbuffer))
{
done = true;
}
else
{
arguments.push_back(inbuffer);
}
}
else
{
done = true;
}
}
return true;
}
// END VERBATIM JUNK SHOULD BE REMOVED
// check for black line or comment
if(blankLine.find(inbuffer) || comment.find(inbuffer))
{
return false;
}
// look for a oneline fun(arg arg2)
else if(oneLiner.find(inbuffer))
{
// the arguments are the second match
std::string args = oneLiner.match(2);
name = oneLiner.match(1);
// break up the arguments
cmSystemTools::GetArguments(args, arguments);
return true;
}
// look for a start of a multiline with no trailing ")" fun(arg arg2
else if(multiLine.find(inbuffer))
{
name = multiLine.match(1);
std::string args = multiLine.match(2);
cmSystemTools::GetArguments(args, arguments);
// Read lines until the closing paren is hit
bool done = false;
while(!done)
{
// read lines until the end paren is found
if(fin.getline(inbuffer, BUFFER_SIZE ) )
{
// Check for comment lines and ignore them.
if(blankLine.find(inbuffer) || comment.find(inbuffer))
{ continue; }
// Is this the last line?
if(lastLine.find(inbuffer))
{
done = true;
std::string args = lastLine.match(1);
cmSystemTools::GetArguments(args, arguments);
}
else
{
std::string line = inbuffer;
cmSystemTools::GetArguments(line, arguments);
}
}
else
{
cmSystemTools::Error("Parse error in read function missing end )",
inbuffer);
return false;
}
}
return true;
}
else
{
cmSystemTools::Error("Parse error in read function ", inbuffer);
return false;
}
}
return false;
}
void cmSystemTools::GetArguments(std::string& line,
std::vector<std::string>& arguments)
{
// Match a normal argument (not quoted, no spaces).
cmRegularExpression normalArgument("[\t ]*([^\" \t]+)[\t ]*");
// Match a quoted argument (surrounded by double quotes, spaces allowed).
cmRegularExpression quotedArgument("[\t ]*(\"[^\"]*\")[\t ]*");
bool done = false;
while(!done)
{
std::string arg;
long endpos;
bool foundQuoted = quotedArgument.find(line.c_str());
bool foundNormal = normalArgument.find(line.c_str());
if(foundQuoted && foundNormal)
{
// Both matches were found. Take the earlier one.
if(normalArgument.start(1) < quotedArgument.start(1))
{
arg = normalArgument.match(1);
endpos = normalArgument.end(1);
}
else
{
arg = quotedArgument.match(1);
endpos = quotedArgument.end(1);
// Strip off the double quotes on the ends.
arg = arg.substr(1, arg.length()-2);
}
}
else if (foundQuoted)
{
arg = quotedArgument.match(1);
endpos = quotedArgument.end(1);
// Strip off the double quotes on the ends.
arg = arg.substr(1, arg.length()-2);
}
else if(foundNormal)
{
arg = normalArgument.match(1);
endpos = normalArgument.end(1);
}
else
{
done = true;
}
if(!done)
{
arguments.push_back(arg);
line = line.substr(endpos, line.length() - endpos);
}
}
}
void cmSystemTools::Error(const char* m1, const char* m2,
const char* m3, const char* m4)
{
std::string message = "CMake Error: ";
if(m1)
{
message += m1;
}
if(m2)
{
message += m2;
}
if(m3)
{
message += m3;
}
if(m4)
{
message += m4;
}
cmSystemTools::s_ErrorOccured = true;
#if defined(_WIN32) && !defined(__CYGWIN__)
::MessageBox(0, message.c_str(), 0, MB_OK);
std::cerr << message.c_str() << std::endl;
#else
std::cerr << message.c_str() << std::endl;
#endif
}
void cmSystemTools::CopyFileIfDifferent(const char* source,
const char* destination)
{
if(cmSystemTools::FilesDiffer(source, destination))
{
cmSystemTools::cmCopyFile(source, destination);
}
}
bool cmSystemTools::FilesDiffer(const char* source,
const char* destination)
{
struct stat statSource;
if (stat(source, &statSource) != 0)
{
return true;
}
struct stat statDestination;
if (stat(destination, &statDestination) != 0)
{
return true;
}
if(statSource.st_size != statDestination.st_size)
{
return true;
}
std::ifstream finSource(source);
std::ifstream finDestination(destination);
if(!finSource || !finDestination)
{
return true;
}
while(finSource && finDestination)
{
char s, d;
finSource >> s;
finDestination >> d;
if(s != d)
{
return true;
}
}
return false;
}
void cmSystemTools::cmCopyFile(const char* source,
const char* destination)
{
std::ifstream fin(source);
char buff[4096];
std::ofstream fout(destination);
if(!fout )
{
cmSystemTools::Error("CopyFile failed to open input file", source);
}
if(!fin)
{
cmSystemTools::Error("CopyFile failed to open output file", destination);
}
while(fin)
{
fin.getline(buff, 4096);
if(fin)
{
fout << buff << "\n";
}
}
}
// return true if the file exists
long int cmSystemTools::ModifiedTime(const char* filename)
{
struct stat fs;
if (stat(filename, &fs) != 0)
{
return 0;
}
else
{
return (long int)fs.st_mtime;
}
}
void cmSystemTools::RemoveFile(const char* source)
{
unlink(source);
}