public static bool PerformPreProcessFile(string filePath, List<PreProcessFile> ppFiles, List<preprocessFile_IfDefModes> ifdefs = null, string name = "", Dictionary<string, PPDefine> defines = null)
{
if (name == "")
name = filePath.Substring(filePath.LastIndexOf('\\') + 1);
if (ifdefs == null)
ifdefs = new List<preprocessFile_IfDefModes>();
if (defines == null)
defines = new Dictionary<string, PPDefine>();
//Open given file
StreamReader reader = new StreamReader(filePath);
PreProcessFile ppFile = new PreProcessFile(filePath, name);
if (ppFiles != null)
ppFiles.Add(ppFile);
StreamWriter writer = new StreamWriter(ppFile.FileStream);
//Prepare some variables needed for the entire processing periode in this function
string s;
uint filelinenumber = 0;
while ((s = reader.ReadLine()) != null)
{
filelinenumber++;
//skip empty lines
if (string.IsNullOrWhiteSpace(s))
{
writer.WriteLine();
continue;
}
//Remove left & right whitespaces and tabs from current string
string sTrimmed = s.TrimStart();
string leading = s.Substring(0, s.Length - sTrimmed.Length);
s = sTrimmed;
if (s[0] != '#')
{//Current line is no define, thus handle it normally (find & replace)
//Make sure we are not inside of an ifdef/ifndef that disallows further processing of following lines
int i = ifdefs.Count - 1;
if (i >= 0 && ifdefs[i] != preprocessFile_IfDefModes.TRUE)
continue;
try
{
//Let every define check if it is inside of current line
foreach (PPDefine def in defines.Values)
s = def.replace(s);
}
catch (Exception ex)
{
//Catch possible exceptions from define parsing
Logger.Error(string.Concat("Experienced some error while parsing existing defines. ", ex.Message, ". file: ", filePath, ". linenumber: ", filelinenumber));
reader.Close();
return false;
}
writer.WriteLine(leading + s);
continue;
}
//We DO have a define here
//get end of the define name
int spaceIndex = s.IndexOf(' ');
if (spaceIndex < 0)
spaceIndex = s.Length;
//set some required variables for the switch
int index = -1;
int index2 = -1;
//get text AFTER the define
string afterDefine = s.Substring(spaceIndex).TrimStart();
writer.WriteLine();
//Check which define was used
switch (s.Substring(0, spaceIndex))
{
default:
throw new Exception("Encountered unknown define '" + s.Substring(0, spaceIndex) + "'");
case "#include":
//We are supposed to include a new file at this spot so lets do it
//Beautify the filepath so we can work with it
afterDefine.Trim();
string newFile;
newFile = afterDefine.Trim(new char[] { '"', '\'', ' ' });
//make sure we have no self reference here
if (newFile.Equals(filePath, StringComparison.OrdinalIgnoreCase))
{
//Ohhh no ... some problem in OSI layer 8
reader.Close();
writer.Close();
throw new Exception("Include contains self reference. file: " + filePath + ". linenumber: " + filelinenumber);
}
//process the file before continuing with this
try
{
if (!PerformPreProcessFile(newFile, ppFiles, ifdefs, afterDefine.Trim(new char[] { '<', '>', '"', '\'', ' ' }), defines))
{
//A sub file encountered an error, so stop here to prevent useles waste of ressources
reader.Close();
writer.Close();
return false;
}
}
catch (Exception e)
{
throw new Exception(e.Message + ", from " + filePath);
}
break;
case "#define":
//The user wants to define something here
while (s.EndsWith("\\"))
{
writer.WriteLine();
afterDefine += reader.ReadLine();
filelinenumber++;
}
//Get the two possible characters index that can be encountered after a define
index = afterDefine.IndexOf(' ');
index2 = afterDefine.IndexOf('(');
//check which one is found first
if (index < 0 || (index2 < index && index2 >= 0))
index = afterDefine.IndexOf('(');
//check that we really got a define with a value here, if not just take the entire length as no value is needed and only value provided
if (index < 0)
index = afterDefine.Length;
if (defines.ContainsKey(afterDefine.Substring(0, index)))
{
//Redefining something is not allowed, so throw an error here
reader.Close();
writer.Close();
throw new Exception("Redefining a define is not allowed! Use #undefine to undef something. file: " + filePath + ". linenumber: " + filelinenumber);
}
//FINALLY add the define
defines.Add(afterDefine.Substring(0, index), new PPDefine(afterDefine));
break;
case "#undefine":
//just remove straigth
defines.Remove(s.Substring(spaceIndex).Trim());
break;
case "#ifdef":
//do required stuff for define ifs
if (defines.ContainsKey(afterDefine))
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.TRUE : preprocessFile_IfDefModes.IGNORE);
else
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.FALSE : preprocessFile_IfDefModes.IGNORE);
break;
case "#ifndef":
//do required stuff for define ifs
if (defines.ContainsKey(afterDefine))
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.FALSE : preprocessFile_IfDefModes.IGNORE);
else
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.TRUE : preprocessFile_IfDefModes.IGNORE);
break;
case "#else":
//do required stuff for define ifs
index = ifdefs.Count - 1;
if (index < 0)
{
reader.Close();
writer.Close();
throw new Exception("unexpected #else. file: " + filePath + ". linenumber: " + filelinenumber);
}
//swap the value of currents if scope to the correct value
ifdefs[index] = (ifdefs[index] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.FALSE : (ifdefs[index] == preprocessFile_IfDefModes.FALSE ? preprocessFile_IfDefModes.TRUE : preprocessFile_IfDefModes.IGNORE));
break;
case "#endif":
//do required stuff for define ifs
index = ifdefs.Count - 1;
if (index < 0)
{
reader.Close();
writer.Close();
throw new Exception("unexpected #endif. file: " + filePath + ". linenumber: " + filelinenumber);
}
//remove current if scope
ifdefs.RemoveAt(index);
break;
}
}
reader.Close();
writer.Flush();
ppFile.resetPosition();
return true;
}
public static bool PerformPreProcessFile(string filePath, List <PreProcessFile> ppFiles, List <preprocessFile_IfDefModes> ifdefs = null, string name = "", Dictionary <string, PPDefine> defines = null)
{
if (name == "")
{
name = filePath.Substring(filePath.LastIndexOf('\\') + 1);
}
if (ifdefs == null)
{
ifdefs = new List <preprocessFile_IfDefModes>();
}
if (defines == null)
{
defines = new Dictionary <string, PPDefine>();
}
//Open given file
StreamReader reader = new StreamReader(filePath);
PreProcessFile ppFile = new PreProcessFile(filePath, name);
if (ppFiles != null)
{
ppFiles.Add(ppFile);
}
StreamWriter writer = new StreamWriter(ppFile.FileStream);
//Prepare some variables needed for the entire processing periode in this function
string s;
uint filelinenumber = 0;
while ((s = reader.ReadLine()) != null)
{
filelinenumber++;
//skip empty lines
if (string.IsNullOrWhiteSpace(s))
{
writer.WriteLine();
continue;
}
//Remove left & right whitespaces and tabs from current string
string sTrimmed = s.TrimStart();
string leading = s.Substring(0, s.Length - sTrimmed.Length);
s = sTrimmed;
if (s[0] != '#')
{//Current line is no define, thus handle it normally (find & replace)
//Make sure we are not inside of an ifdef/ifndef that disallows further processing of following lines
int i = ifdefs.Count - 1;
if (i >= 0 && ifdefs[i] != preprocessFile_IfDefModes.TRUE)
{
continue;
}
try
{
//Let every define check if it is inside of current line
foreach (PPDefine def in defines.Values)
{
s = def.replace(s);
}
}
catch (Exception ex)
{
//Catch possible exceptions from define parsing
Logger.Error(string.Concat("Experienced some error while parsing existing defines. ", ex.Message, ". file: ", filePath, ". linenumber: ", filelinenumber));
reader.Close();
return(false);
}
writer.WriteLine(leading + s);
continue;
}
//We DO have a define here
//get end of the define name
int spaceIndex = s.IndexOf(' ');
if (spaceIndex < 0)
{
spaceIndex = s.Length;
}
//set some required variables for the switch
int index = -1;
int index2 = -1;
//get text AFTER the define
string afterDefine = s.Substring(spaceIndex).TrimStart();
writer.WriteLine();
//Check which define was used
switch (s.Substring(0, spaceIndex))
{
default:
throw new Exception("Encountered unknown define '" + s.Substring(0, spaceIndex) + "'");
case "#include":
//We are supposed to include a new file at this spot so lets do it
//Beautify the filepath so we can work with it
afterDefine.Trim();
string newFile;
newFile = afterDefine.Trim(new char[] { '"', '\'', ' ' });
//make sure we have no self reference here
if (newFile.Equals(filePath, StringComparison.OrdinalIgnoreCase))
{
//Ohhh no ... some problem in OSI layer 8
reader.Close();
writer.Close();
throw new Exception("Include contains self reference. file: " + filePath + ". linenumber: " + filelinenumber);
}
//process the file before continuing with this
try
{
if (!PerformPreProcessFile(newFile, ppFiles, ifdefs, afterDefine.Trim(new char[] { '<', '>', '"', '\'', ' ' }), defines))
{
//A sub file encountered an error, so stop here to prevent useles waste of ressources
reader.Close();
writer.Close();
return(false);
}
}
catch (Exception e)
{
throw new Exception(e.Message + ", from " + filePath);
}
break;
case "#define":
//The user wants to define something here
while (s.EndsWith("\\"))
{
writer.WriteLine();
afterDefine += reader.ReadLine();
filelinenumber++;
}
//Get the two possible characters index that can be encountered after a define
index = afterDefine.IndexOf(' ');
index2 = afterDefine.IndexOf('(');
//check which one is found first
if (index < 0 || (index2 < index && index2 >= 0))
{
index = afterDefine.IndexOf('(');
}
//check that we really got a define with a value here, if not just take the entire length as no value is needed and only value provided
if (index < 0)
{
index = afterDefine.Length;
}
if (defines.ContainsKey(afterDefine.Substring(0, index)))
{
//Redefining something is not allowed, so throw an error here
reader.Close();
writer.Close();
throw new Exception("Redefining a define is not allowed! Use #undefine to undef something. file: " + filePath + ". linenumber: " + filelinenumber);
}
//FINALLY add the define
defines.Add(afterDefine.Substring(0, index), new PPDefine(afterDefine));
break;
case "#undefine":
//just remove straigth
defines.Remove(s.Substring(spaceIndex).Trim());
break;
case "#ifdef":
//do required stuff for define ifs
if (defines.ContainsKey(afterDefine))
{
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.TRUE : preprocessFile_IfDefModes.IGNORE);
}
else
{
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.FALSE : preprocessFile_IfDefModes.IGNORE);
}
break;
case "#ifndef":
//do required stuff for define ifs
if (defines.ContainsKey(afterDefine))
{
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.FALSE : preprocessFile_IfDefModes.IGNORE);
}
else
{
ifdefs.Add(ifdefs.Count == 0 || ifdefs[ifdefs.Count - 1] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.TRUE : preprocessFile_IfDefModes.IGNORE);
}
break;
case "#else":
//do required stuff for define ifs
index = ifdefs.Count - 1;
if (index < 0)
{
reader.Close();
writer.Close();
throw new Exception("unexpected #else. file: " + filePath + ". linenumber: " + filelinenumber);
}
//swap the value of currents if scope to the correct value
ifdefs[index] = (ifdefs[index] == preprocessFile_IfDefModes.TRUE ? preprocessFile_IfDefModes.FALSE : (ifdefs[index] == preprocessFile_IfDefModes.FALSE ? preprocessFile_IfDefModes.TRUE : preprocessFile_IfDefModes.IGNORE));
break;
case "#endif":
//do required stuff for define ifs
index = ifdefs.Count - 1;
if (index < 0)
{
reader.Close();
writer.Close();
throw new Exception("unexpected #endif. file: " + filePath + ". linenumber: " + filelinenumber);
}
//remove current if scope
ifdefs.RemoveAt(index);
break;
}
}
reader.Close();
writer.Flush();
ppFile.resetPosition();
return(true);
}
