I tried playing with bison--I don't understand a bit of it. Thanks, Tyler Littlefield email: [EMAIL PROTECTED] web: tysdomain-com Visit for quality software and web design. skype: st8amnd2005
----- Original Message ----- From: Mickey Mathieson To: [email protected] Sent: Saturday, November 01, 2008 6:33 AM Subject: Re: [c-prog] c++ code help please? Suggestion : use a lexing and parsing tool like visual parse. Hard code parser can be problematic. Mickey M. Construction Partner Inc. http://www.constructionpartner.com --- On Fri, 10/31/08, Tyler Littlefield <[EMAIL PROTECTED]> wrote: From: Tyler Littlefield <[EMAIL PROTECTED]> Subject: [c-prog] c++ code help please? To: [email protected] Date: Friday, October 31, 2008, 9:50 PM 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] com web: tysdomain-com Visit for quality software and web design. skype: st8amnd2005 [Non-text portions of this message have been removed]
