Re: Command Line Interpreter

    bernfarr@my-deja.com wrote:
> I'm looking for an example of a compiler/interpreter that
> will handle a command line language.


Not trying to litter this NG with source code, but...


// Tiny command-line Interpreter
// jimbo@radiks.net
#include <stdio.h>
#include <string.h>
#include <conio.h>


int main(int argc,char **argv) {
      char buff[1024];
      FILE *fp;
      char *cmd;
      fp=fopen(argv[1],"r");
      while(fgets(buff,1023,fp)!=NULL) {
            cmd=strtok(buff," \t\r\n");
            if(!stricmp(cmd,"echo"))
                  printf("%s\n",strtok(NULL,"\r\n"));
            else
            if(!stricmp(cmd,"pause")) {
                  printf("Press ENTER to continue.\n");
                  getch();
            }
            else
            if(!stricmp(cmd,"exit")) break;
            else
            if(*cmd == '#') ;
      }
      fclose(fp);
}




The above is a very basic command-line interpreter that
understands the commands echo, pause, exit, and # ( #
is a comment character ). The code could be more clean
and certainly needs some error-checking.


Try compiling the above and then enter the following on
a command-line:


      tinycli test.txt


Where test.txt contains the following:


      # This is a tiny interpreter
      echo Hello there!
      pause
      echo This is a very simple interpreter
      pause
      echo Buh-bye!
      exit


Jim Lawless
jimbo@radiks.net
http://www.radiks.net/jimbo

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