syntax.c

/*
 *  file:       syntax.c
 *  date:       July, 2012
 *  purpose:
 *  author:     Nick K.
 */

#include "modules.h"

int syntax(struct lex_type lexChain[], int lexSize)
{
    int STATE = 0, i;

    for(i = 0; i <= lexSize; i++) {
        switch(STATE) {
            case 0: ++STATE;
            case 1: if(strcmp(lexChain[STATE-1].lexem,"while") == 0){
                    ++STATE;
                    continue;
                }
                return 0;
            case 2: if(strcmp(lexChain[STATE-1].lexem_class,"SPACE") == 0){
                    ++STATE;
                    continue;
                }
                return 0;
            case 3: if((strcmp(lexChain[STATE-1].lexem_class,"IDENTIFIER") == 0) ||
                (strcmp(lexChain[STATE-1].lexem_class,"LOGCONST") == 0)){
                    ++STATE;
                    continue;
                }
                return 0;
            case 4: if(strcmp(lexChain[STATE-1].lexem_class,"SPACE") == 0){
                    ++STATE;
                    continue;
                }
                return 0;
            case 5: if(strcmp(lexChain[STATE-1].lexem,"do") == 0){
                    ++STATE;
                    continue;
                }
                return 0;
            case 6: if(strcmp(lexChain[STATE-1].lexem_class,"SPACE") == 0){
                    ++STATE;
                    continue;
                }
                return 0;
            case 7: if(strcmp(lexChain[STATE-1].lexem_class,"IDENTIFIER") == 0){
                 ++STATE;
                 continue;
                }
                return 0;
            case 8: if(strcmp(lexChain[STATE-1].lexem_class,"ASSIGNS") == 0){
                    ++STATE;
                    continue;
                }
                return 0;
            case 9: if(strcmp(lexChain[STATE-1].lexem_class,"IDENTIFIER") == 0){
                ++STATE;
                continue;
                }
                return 0;
            case 10: if((strcmp(lexChain[STATE-1].lexem_class,"INDEX") == 0)||
                    (strcmp(lexChain[STATE-1].lexem_class,"SPACE") == 0)){
                    ++STATE;
                    continue;
                }
                if(strcmp(lexChain[STATE-1].lexem_class,"SEMICOLON") == 0)
                    return 1;
                return 0;
            case 11: if(strcmp(lexChain[STATE-1].lexem_class,"SEMICOLON") == 0){
                    return 1;
                }

        }
    }

}