/*
 *  This is a rather ugly program written for Project 12
 *  J Dean Brock, 2011
 *
 * DO NOT MODIFY THIS FILE
 */



#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "parsecommand.h"

#define NUMCOMMANDS 5
const char *commands[] = {
    "dcl" ,
    "inc" ,
    "prt" ,
    "row" ,
    "col"
} ;

int parseCommand(char *inBuff, char *command, int *row, int *col) {
    char mybuff[3] ;
    char matchMe ;
    int i, myRow, myCol ;
    char *leftBrace, *rightBrace ;

    /* See if there is a command followed by X */
    if (sscanf(inBuff, " %c%c%c %*[xX] [ %c",
               &mybuff[0], &mybuff[1], &mybuff[2], &matchMe) != 4) {
        return -1 ;
    }
    for(i=0; i<3; ++i) {
        mybuff[i] = tolower((int)mybuff[i]) ;
    }
    for(i=0; i<NUMCOMMANDS && strncmp(mybuff, commands[i], 3) ; ++i) {
    }
    if (i==NUMCOMMANDS) {
        return -1 ;
    }
    
    /* See if there are brackets [ ] in the right order */
    leftBrace = strchr(inBuff, '[') ;
    rightBrace = strchr(inBuff, ']') ;
    if (leftBrace == NULL
        || rightBrace == NULL
        || leftBrace > rightBrace) {
        return -1 ;
    }
    
    /* Make sure nothing but whitespace follows the ] */
    if (sscanf(rightBrace+1, " %c", &matchMe) == 1) {
        return -1 ;
    }
    
    /* See if the commands match row and column as needed */
    if (mybuff[0] == 'r') {
        if (sscanf(leftBrace+1, "%d , * %*[]]%c", &myRow, &matchMe) != 2) {
            return -1 ;
        }
    } else if (mybuff[0] == 'c') {
        if (sscanf(leftBrace+1, " * ,%d %*[]]%c", &myCol, &matchMe) != 2) {
            return -1 ;
        }
    } else {
        if (sscanf(leftBrace+1, " %d ,%d %*[]]%c", &myRow, &myCol, &matchMe) != 3) {
            return -1 ;
        }
    }

    /* If we get here, it must have worked.  Let's store some results!*/
    strncpy(command, mybuff, 3) ;
    if (mybuff[0] != 'c') {
        *row = myRow ;
    }
    if (mybuff[0] != 'r') {
        *col = myCol ;
    }
    
    return 0 ;
}