Hello list,
I'm working on a basic config parser.
I've got the following code; my config file looks like:
docroot="/home/tyler/docroot/"
The parser is able to pick that out, but it's unable (sadly) to tell it's
the last line; it just runs in a loop.
I know the code is kinda messy--I'll clean it up once it's running smoother.
Any suggestions would be great.
here's the main function, below that will be the definition for the Var
struct.
//code:
map<string,Var> ParseFile(string FileName)
{
map <string,Var> parsed; //will hold the parsed data
FILE *input=fopen(FileName.c_str(),"r");
if (input==NULL)
{
cout << "Opening of file failed!" << endl;
return parsed;
}
rewind(input); //make sure the pointer is at the top of the file
string line; //holds the line to be parsed.
string name; //the name of the variable.
string val; //the value of the variable.
string temp; //will be used for stripping out whitespace
Var variable; //the actual variable.
char v; //used to get a char from the file.
string::iterator top; //will be used to count.
string::iterator tracker; //another counter/placeholder iterator.
size_t index; //used to find '"' in strings.
size_t fq; //holds the position of the first quote.
size_t lq; //holds the position of the last quote.
//we'll run until end of file is reached:
while (feof(input)==0)
{
line="";
//runs until feof or end of line
//will also set the variable line up for parsing
while (((int)v!=10)&&((int)v!=13)&&(feof(input)==0))
{
if (feof(input)!=0)
{
break;
}
v=fgetc(input);
line+=v;
}
top = line.begin();
//checks to see if we've got a comment.
if (*top=='#')
{
continue;
}
//will run until we see '='
//will split the variable and value apart.
for (top=line.begin();top<line.end();top++)
{
if (*top=='=')
{
name="";
//we found the name; lets take it off the line variable.
for (tracker=line.begin();tracker<top;tracker++)
{
name+=*tracker;
}
top++; //skip the '=' sign.
val="";
//retrieve the rest of the string.
for (tracker=top;tracker<line.end();tracker++)
{
val+=*tracker;
}
break;
}
}
temp="";
//now we'll run through the name and strip off whitespace.
for (top=name.begin();top<name.end();top++)
{
if (*top!=' ')
{
temp+=*top;
}
}
name=temp;
cout << "Name set to: " << name << endl;
//now we find out what kind of variable val holds:
index=val.find('"');
if (index==string::npos)
{
//quote wasn't found, we've got ourselves an integer, boys and girls.
//we'll strip the spaces out:
temp="";
for (top=val.begin();top<val.end();top++)
{
if (*top!=' ')
{
temp+=*top;
}
}
val=temp;
//we'll initialize the variable, and clean it up
variable.type=TYPE_INT;
variable.str="";
variable.integer=atoi(val.c_str());
parsed[name.c_str()]=variable;
cout << "Adding integer. " << variable.integer << endl;
continue;
}
else
{
fq=val.find_first_of('"');
lq=val.find_last_of('"');
top=(val.begin()+fq);
temp="";
tracker=(val.begin()+lq);
for (top=top;top<tracker;top++)
{
temp+=*top;
}
cout << "Setting string variable. " << val << endl;
variable.str=val;
variable.type=TYPE_STR;
variable.integer=0;
parsed[name.c_str()]=variable;
}
}
return parsed;
}
//and now the var struct:
typedef enum {
TYPE_INT,
TYPE_STR
} TYPE_VAR; //the types of variables.
//this is the basic variable found in the configuration file.
typedef struct _Var
{
string str;
int integer;
TYPE_VAR type;
} Var;
Thanks,
Tyler Littlefield
email: [EMAIL PROTECTED]
web: tysdomain-com
Visit for quality software and web design.
skype: st8amnd2005
