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parser.c
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parser.c
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#include "parser.h"
#include "stack.h"
int parse_table[NONTERM_COUNT][TERM_COUNT];
const char* nonterm_names[] = {"Program", "Functions", "FunctionDef", "fnReturn", "Statements", "moreStmts", "Stmt", "ReturnStmt", "BreakStmt", "DeclarationStmt", "moreDeclarations", "mutMod", "Declaration", "moreTypes", "AssignStmtType2", "listTypes", "typeList", "moreList", "singleAssn", "multAssn", "moreAssn", "IDStmts", "IDStmts2", "Index", "moreIndex", "AssignStmtType1", "FunCall", "MethodCall", "FunCallStmt", "MethodStmt", "Type", "parameterList", "remainingList", "IfStmt", "ElseStmt", "IStmt", "OStmt", "value", "array", "IDList", "moreIds", "arithExpn", "moreTerms", "arithTerm", "moreFactors", "factor", "opLow", "relType", "opHigh", "boolExpn", "logicalOp", "relationalOp", "LoopStmt", "grid", "rows", "moreRows", "row", "moreNums", "boolean"};
const int rules[RULE_COUNT][RULE_MAX_SYMBOLS] = {
{ Functions, MAIN, OPAREN, CPAREN, OBRACE, Statements, CBRACE },
{ FunctionDef, Functions },
{ EPSILON },
{ FN, ID, OPAREN, parameterList, CPAREN, fnReturn, OBRACE, Statements, CBRACE },
{ RARROW, Type },
{ EPSILON },
{ Stmt , moreStmts },
{ Stmt , moreStmts },
{ EPSILON },
{ COMMENT },
{ ID , IDStmts },
{ OStmt },
{ LoopStmt },
{ AssignStmtType2 },
{ DeclarationStmt },
{ IStmt },
{ IfStmt },
{ ReturnStmt },
{ BreakStmt },
{ RETURN, relType, SEMICOLON },
{ BREAK, SEMICOLON },
{ LET, mutMod, moreDeclarations },
{ AssignStmtType2 },
{ Declaration },
{ MUT },
{ EPSILON },
{ ID, ASSIGNOP, arithExpn, moreTypes, SEMICOLON },
{ COMMA, Declaration },
{ EPSILON },
{ listTypes, ASSIGNOP, OPAREN, multAssn, CPAREN, SEMICOLON },
{ OPAREN, typeList, CPAREN },
{ ID, moreList },
{ COMMA, typeList },
{ EPSILON },
{ arithExpn },
{ singleAssn, moreAssn },
{ COMMA, multAssn },
{ COLON, multAssn },
{ EPSILON },
{ OSQUARE, ID, CSQUARE, OSQUARE, ID, CSQUARE, AssignStmtType1 },
{ MethodStmt },
{ AssignStmtType1 },
{ FunCallStmt },
{ Index },
{ MethodCall },
{ FunCall },
{ EPSILON },
{ OSQUARE, relType, CSQUARE, moreIndex },
{ relType },
{ NUM },
{ OSQUARE, ID, CSQUARE },
{ EPSILON },
{ ASSIGNOP, singleAssn, SEMICOLON },
{ OPAREN, IDList ,CPAREN },
{ DOT, ID, FunCall },
{ FunCall, SEMICOLON },
{ MethodCall, SEMICOLON },
{ BOOL },
{ F32 },
{ I32 },
{ STRING },
{ ID, COLON, Type, remainingList },
{ COMMA, parameterList },
{ EPSILON },
{ IF, OPAREN, boolExpn, CPAREN, OBRACE, Statements, CBRACE, ElseStmt },
{ ELSEIF, OPAREN, boolExpn, CPAREN, OBRACE, Statements, CBRACE, ElseStmt },
{ ELSE, OBRACE , Statements, CBRACE },
{ EPSILON },
{ SCAN, OPAREN, ID, CPAREN, SEMICOLON },
{ PRINT, OPAREN, relType, CPAREN, SEMICOLON },
{ CHARL },
{ NUM },
{ STRL },
{ grid },
{ array },
{ boolean },
{ OSQUARE, multAssn, CSQUARE },
{ relType, moreIds },
{ EPSILON },
{ COMMA, IDList },
{ EPSILON },
{ arithTerm , moreTerms },
{ opLow , arithExpn },
{ EPSILON },
{ factor , moreFactors },
{ opHigh , arithTerm },
{ EPSILON },
{ OPAREN , arithExpn, CPAREN },
{ relType },
{ MINUS },
{ PLUS },
{ ID, IDStmts2 },
{ value },
{ DIV },
{ MUL },
{ OPAREN, boolExpn, CPAREN, logicalOp, OPAREN, boolExpn, CPAREN },
{ relType, relationalOp, relType },
{ AND },
{ NOT },
{ OR },
{ EQ },
{ GT },
{ GE },
{ LT },
{ LE },
{ NE },
{ WHILE, OPAREN, boolExpn, CPAREN, OBRACE, Statements, CBRACE },
{ OBRACE, rows, CBRACE },
{ row , moreRows },
{ COLON, rows },
{ EPSILON },
{ NUM, moreNums },
{ COMMA, NUM, moreNums },
{ EPSILON },
{ FALSE },
{ TRUE },
{ FLOAT }
};
void set_parse_table_cell(int terminal, int token, int rule) {
parse_table[terminal - 100][token] = rule;
}
void init_parse_table(){
// initialize undefined positions with -1
for(int i = 0; i < NONTERM_COUNT; i++)
for(int j = 0; j < TERM_COUNT; j++)
parse_table[i][j] = -1;
set_parse_table_cell(Program, FN, 0);
set_parse_table_cell(Program, MAIN, 0);
set_parse_table_cell(Functions, FN, 1);
set_parse_table_cell(Functions, EPSILON, 2);
set_parse_table_cell(Functions, MAIN, 2);
set_parse_table_cell(FunctionDef, FN, 3);
set_parse_table_cell(fnReturn, RARROW, 4);
set_parse_table_cell(fnReturn, EPSILON, 5);
set_parse_table_cell(fnReturn, OBRACE, 5);
set_parse_table_cell(Statements, LET, 6);
set_parse_table_cell(Statements, COMMENT, 6);
set_parse_table_cell(Statements, ID, 6);
set_parse_table_cell(Statements, IF, 6);
set_parse_table_cell(Statements, OPAREN, 6);
set_parse_table_cell(Statements, WHILE, 6);
set_parse_table_cell(Statements, RETURN, 6);
set_parse_table_cell(Statements, BREAK, 6);
set_parse_table_cell(Statements, SCAN, 6);
set_parse_table_cell(Statements, PRINT, 6);
set_parse_table_cell(moreStmts, LET, 7);
set_parse_table_cell(moreStmts, COMMENT, 7);
set_parse_table_cell(moreStmts, ID, 7);
set_parse_table_cell(moreStmts, IF, 7);
set_parse_table_cell(moreStmts, OPAREN, 7);
set_parse_table_cell(moreStmts, WHILE, 7);
set_parse_table_cell(moreStmts, RETURN, 7);
set_parse_table_cell(moreStmts, BREAK, 7);
set_parse_table_cell(moreStmts, SCAN, 7);
set_parse_table_cell(moreStmts, PRINT, 7);
set_parse_table_cell(moreStmts, EPSILON, 8);
set_parse_table_cell(moreStmts, CBRACE, 8);
set_parse_table_cell(Stmt, COMMENT, 9);
set_parse_table_cell(Stmt, ID, 10);
set_parse_table_cell(Stmt, PRINT, 11);
set_parse_table_cell(Stmt, WHILE, 12);
set_parse_table_cell(Stmt, OPAREN, 13);
set_parse_table_cell(Stmt, LET, 14);
set_parse_table_cell(Stmt, SCAN, 15);
set_parse_table_cell(Stmt, IF, 16);
set_parse_table_cell(Stmt, RETURN, 17);
set_parse_table_cell(Stmt, BREAK, 18);
set_parse_table_cell(ReturnStmt, RETURN, 19);
set_parse_table_cell(BreakStmt, BREAK, 20);
set_parse_table_cell(DeclarationStmt, LET, 21);
set_parse_table_cell(moreDeclarations, OPAREN, 22);
set_parse_table_cell(moreDeclarations, ID, 23);
set_parse_table_cell(mutMod, MUT, 24);
set_parse_table_cell(mutMod, EPSILON, 25);
set_parse_table_cell(mutMod, ID, 25);
set_parse_table_cell(mutMod, OPAREN, 25);
set_parse_table_cell(Declaration, ID, 26);
set_parse_table_cell(moreTypes, COMMA, 27);
set_parse_table_cell(moreTypes, EPSILON, 28);
set_parse_table_cell(moreTypes, SEMICOLON, 28);
set_parse_table_cell(AssignStmtType2, OPAREN, 29);
set_parse_table_cell(listTypes, OPAREN, 30);
set_parse_table_cell(typeList, ID, 31);
set_parse_table_cell(moreList, COMMA, 32);
set_parse_table_cell(moreList, EPSILON, 33);
set_parse_table_cell(moreList, CPAREN, 33);
set_parse_table_cell(singleAssn, TRUE, 34);
set_parse_table_cell(singleAssn, OBRACE, 34);
set_parse_table_cell(singleAssn, NUM, 34);
set_parse_table_cell(singleAssn, ID, 34);
set_parse_table_cell(singleAssn, OSQUARE, 34);
set_parse_table_cell(singleAssn, STRL, 34);
set_parse_table_cell(singleAssn, OPAREN, 34);
set_parse_table_cell(singleAssn, CHARL, 34);
set_parse_table_cell(singleAssn, FALSE, 34);
set_parse_table_cell(singleAssn, FLOAT, 34);
set_parse_table_cell(multAssn, TRUE, 35);
set_parse_table_cell(multAssn, OBRACE, 35);
set_parse_table_cell(multAssn, NUM, 35);
set_parse_table_cell(multAssn, ID, 35);
set_parse_table_cell(multAssn, OSQUARE, 35);
set_parse_table_cell(multAssn, STRL, 35);
set_parse_table_cell(multAssn, OPAREN, 35);
set_parse_table_cell(multAssn, CHARL, 35);
set_parse_table_cell(multAssn, FLOAT, 35); //CHANGE
set_parse_table_cell(multAssn, FALSE, 35);
set_parse_table_cell(moreAssn, COMMA, 36);
set_parse_table_cell(moreAssn, COLON, 37);
set_parse_table_cell(moreAssn, EPSILON, 38);
set_parse_table_cell(moreAssn, CSQUARE, 38);
set_parse_table_cell(moreAssn, CPAREN, 38);
set_parse_table_cell(IDStmts, OSQUARE, 39);
set_parse_table_cell(IDStmts, DOT, 40);
set_parse_table_cell(IDStmts, ASSIGNOP, 41);
set_parse_table_cell(IDStmts, OPAREN, 42);
set_parse_table_cell(IDStmts2, NUM, 43);
set_parse_table_cell(IDStmts2, ID, 43);
set_parse_table_cell(IDStmts2, OSQUARE, 43);
set_parse_table_cell(IDStmts2, DOT, 44);
set_parse_table_cell(IDStmts2, OPAREN, 45);
set_parse_table_cell(IDStmts2, EPSILON, 46);
set_parse_table_cell(IDStmts2, PLUS, 46);
set_parse_table_cell(IDStmts2, GE, 46);
set_parse_table_cell(IDStmts2, DIV, 46);
set_parse_table_cell(IDStmts2, LE, 46);
set_parse_table_cell(IDStmts2, CSQUARE, 46);
set_parse_table_cell(IDStmts2, MUL, 46);
set_parse_table_cell(IDStmts2, CPAREN, 46);
set_parse_table_cell(IDStmts2, NE, 46);
set_parse_table_cell(IDStmts2, EQ, 46);
set_parse_table_cell(IDStmts2, GT, 46);
set_parse_table_cell(IDStmts2, LT, 46);
set_parse_table_cell(IDStmts2, COMMA, 46);
set_parse_table_cell(IDStmts2, COLON, 46);
set_parse_table_cell(IDStmts2, SEMICOLON, 46);
set_parse_table_cell(IDStmts2, MINUS, 46);
set_parse_table_cell(Index, OSQUARE, 47);
set_parse_table_cell(Index, ID, 48);
set_parse_table_cell(Index, NUM, 49);
set_parse_table_cell(moreIndex, OSQUARE, 50);
set_parse_table_cell(moreIndex, EPSILON, 51);
set_parse_table_cell(moreIndex, PLUS, 51);
set_parse_table_cell(moreIndex, GE, 51);
set_parse_table_cell(moreIndex, DIV, 51);
set_parse_table_cell(moreIndex, LE, 51);
set_parse_table_cell(moreIndex, CSQUARE, 51);
set_parse_table_cell(moreIndex, MUL, 51);
set_parse_table_cell(moreIndex, CPAREN, 51);
set_parse_table_cell(moreIndex, NE, 51);
set_parse_table_cell(moreIndex, EQ, 51);
set_parse_table_cell(moreIndex, GT, 51);
set_parse_table_cell(moreIndex, LT, 51);
set_parse_table_cell(moreIndex, COMMA, 51);
set_parse_table_cell(moreIndex, COLON, 51);
set_parse_table_cell(moreIndex, SEMICOLON, 51);
set_parse_table_cell(moreIndex, MINUS, 51);
set_parse_table_cell(AssignStmtType1, ASSIGNOP, 52);
set_parse_table_cell(FunCall, OPAREN, 53);
set_parse_table_cell(MethodCall, DOT, 54);
set_parse_table_cell(FunCallStmt, OPAREN, 55);
set_parse_table_cell(MethodStmt, DOT, 56);
set_parse_table_cell(Type, BOOL, 57);
set_parse_table_cell(Type, F32, 58);
set_parse_table_cell(Type, I32, 59);
set_parse_table_cell(Type, STRING, 60);
set_parse_table_cell(parameterList, ID, 61);
set_parse_table_cell(remainingList, COMMA, 62);
set_parse_table_cell(remainingList, EPSILON, 63);
set_parse_table_cell(remainingList, CPAREN, 63);
set_parse_table_cell(IfStmt, IF, 64);
set_parse_table_cell(ElseStmt, ELSEIF, 65);
set_parse_table_cell(ElseStmt, ELSE, 66);
set_parse_table_cell(ElseStmt, EPSILON, 67);
set_parse_table_cell(ElseStmt, CBRACE, 67);
set_parse_table_cell(ElseStmt, LET, 67);
set_parse_table_cell(ElseStmt, COMMENT, 67);
set_parse_table_cell(ElseStmt, ID, 67);
set_parse_table_cell(ElseStmt, IF, 67);
set_parse_table_cell(ElseStmt, OPAREN, 67);
set_parse_table_cell(ElseStmt, WHILE, 67);
set_parse_table_cell(ElseStmt, RETURN, 67);
set_parse_table_cell(ElseStmt, BREAK, 67);
set_parse_table_cell(ElseStmt, SCAN, 67);
set_parse_table_cell(ElseStmt, PRINT, 67);
set_parse_table_cell(IStmt, SCAN, 68);
set_parse_table_cell(OStmt, PRINT, 69);
set_parse_table_cell(value, CHARL, 70);
set_parse_table_cell(value, NUM, 71);
set_parse_table_cell(value, STRL, 72);
set_parse_table_cell(value, OBRACE, 73);
set_parse_table_cell(value, OSQUARE, 74);
set_parse_table_cell(value, TRUE, 75);
set_parse_table_cell(value, FALSE, 75);
set_parse_table_cell(value, FLOAT, 116);
set_parse_table_cell(array, OSQUARE, 76);
set_parse_table_cell(IDList, ID, 77);
set_parse_table_cell(IDList, NUM, 77);
set_parse_table_cell(IDList, CHARL, 77);
set_parse_table_cell(IDList, STRL, 77);
set_parse_table_cell(IDList, OBRACE, 77);
set_parse_table_cell(IDList, OSQUARE, 77);
set_parse_table_cell(IDList, TRUE, 77);
set_parse_table_cell(IDList, FALSE, 77);
set_parse_table_cell(IDList, FLOAT, 77);
set_parse_table_cell(IDList, EPSILON, 78);
set_parse_table_cell(IDList, CPAREN, 78);
set_parse_table_cell(moreIds, COMMA, 79);
set_parse_table_cell(moreIds, EPSILON, 80);
set_parse_table_cell(moreIds, CPAREN, 80);
set_parse_table_cell(arithExpn, TRUE, 81);
set_parse_table_cell(arithExpn, OBRACE, 81);
set_parse_table_cell(arithExpn, NUM, 81);
set_parse_table_cell(arithExpn, ID, 81);
set_parse_table_cell(arithExpn, OSQUARE, 81);
set_parse_table_cell(arithExpn, STRL, 81);
set_parse_table_cell(arithExpn, OPAREN, 81);
set_parse_table_cell(arithExpn, CHARL, 81);
set_parse_table_cell(arithExpn, FALSE, 81);
set_parse_table_cell(arithExpn, FLOAT, 81);
set_parse_table_cell(moreTerms, PLUS, 82);
set_parse_table_cell(moreTerms, MINUS, 82);
set_parse_table_cell(moreTerms, EPSILON, 83);
set_parse_table_cell(moreTerms, CSQUARE, 83);
set_parse_table_cell(moreTerms, CPAREN, 83);
set_parse_table_cell(moreTerms, COMMA, 83);
set_parse_table_cell(moreTerms, COLON, 83);
set_parse_table_cell(moreTerms, SEMICOLON, 83);
set_parse_table_cell(arithTerm, TRUE, 84);
set_parse_table_cell(arithTerm, OBRACE, 84);
set_parse_table_cell(arithTerm, NUM, 84);
set_parse_table_cell(arithTerm, ID, 84);
set_parse_table_cell(arithTerm, OSQUARE, 84);
set_parse_table_cell(arithTerm, STRL, 84);
set_parse_table_cell(arithTerm, OPAREN, 84);
set_parse_table_cell(arithTerm, CHARL, 84);
set_parse_table_cell(arithTerm, FLOAT, 84);
set_parse_table_cell(arithTerm, FALSE, 84);
set_parse_table_cell(moreFactors, DIV, 85);
set_parse_table_cell(moreFactors, MUL, 85);
set_parse_table_cell(moreFactors, EPSILON, 86);
set_parse_table_cell(moreFactors, PLUS, 86);
set_parse_table_cell(moreFactors, CSQUARE, 86);
set_parse_table_cell(moreFactors, CPAREN, 86);
set_parse_table_cell(moreFactors, COMMA, 86);
set_parse_table_cell(moreFactors, COLON, 86);
set_parse_table_cell(moreFactors, SEMICOLON, 86);
set_parse_table_cell(moreFactors, MINUS, 86);
set_parse_table_cell(factor, OPAREN, 87);
set_parse_table_cell(factor, TRUE, 88);
set_parse_table_cell(factor, OBRACE, 88);
set_parse_table_cell(factor, NUM, 88);
set_parse_table_cell(factor, ID, 88);
set_parse_table_cell(factor, OSQUARE, 88);
set_parse_table_cell(factor, STRL, 88);
set_parse_table_cell(factor, CHARL, 88);
set_parse_table_cell(factor, FLOAT, 88);
set_parse_table_cell(factor, FALSE, 88);
set_parse_table_cell(opLow, MINUS, 89);
set_parse_table_cell(opLow, PLUS, 90);
set_parse_table_cell(relType, ID, 91);
set_parse_table_cell(relType, TRUE, 92);
set_parse_table_cell(relType, OBRACE, 92);
set_parse_table_cell(relType, NUM, 92);
set_parse_table_cell(relType, OSQUARE, 92);
set_parse_table_cell(relType, STRL, 92);
set_parse_table_cell(relType, CHARL, 92);
set_parse_table_cell(relType, FLOAT, 92);
set_parse_table_cell(relType, FALSE, 92);
set_parse_table_cell(opHigh, DIV, 93);
set_parse_table_cell(opHigh, MUL, 94);
set_parse_table_cell(boolExpn, OPAREN, 95);
set_parse_table_cell(boolExpn, TRUE, 96);
set_parse_table_cell(boolExpn, OBRACE, 96);
set_parse_table_cell(boolExpn, NUM, 96);
set_parse_table_cell(boolExpn, ID, 96);
set_parse_table_cell(boolExpn, OSQUARE, 96);
set_parse_table_cell(boolExpn, STRL, 96);
set_parse_table_cell(boolExpn, CHARL, 96);
set_parse_table_cell(boolExpn, FLOAT, 96);
set_parse_table_cell(boolExpn, FALSE, 96);
set_parse_table_cell(logicalOp, AND, 97);
set_parse_table_cell(logicalOp, NOT, 98);
set_parse_table_cell(logicalOp, OR, 99);
set_parse_table_cell(relationalOp, EQ, 100);
set_parse_table_cell(relationalOp, GT, 101);
set_parse_table_cell(relationalOp, GE, 102);
set_parse_table_cell(relationalOp, LT, 103);
set_parse_table_cell(relationalOp, LE, 104);
set_parse_table_cell(relationalOp, NE, 105);
set_parse_table_cell(LoopStmt, WHILE, 106);
set_parse_table_cell(grid, OBRACE, 107);
set_parse_table_cell(rows, NUM, 108);
set_parse_table_cell(moreRows, COLON, 109);
set_parse_table_cell(moreRows, EPSILON, 110);
set_parse_table_cell(moreRows, CBRACE, 110);
set_parse_table_cell(row, NUM, 111);
set_parse_table_cell(moreNums, COMMA, 112);
set_parse_table_cell(moreNums, EPSILON, 113);
set_parse_table_cell(moreNums, CBRACE, 113);
set_parse_table_cell(moreNums, COLON, 113);
set_parse_table_cell(boolean, FALSE, 114);
set_parse_table_cell(boolean, TRUE, 115);
}
struct symbol_tree {
int symbol;
struct tree_node* root;
};
static void stack_pushval(struct stack* stack, struct symbol_tree value) {
struct symbol_tree* value_ptr = (struct symbol_tree *) malloc(sizeof(struct symbol_tree));
*value_ptr = value;
return stack_push(stack, value_ptr);
}
static int stack_topval(struct stack* stack) {
struct symbol_tree* top = stack_top(stack);
return top->symbol;
}
void print_symbol(FILE* fp, int symbol, union value value) {
if(symbol >= 100)
fprintf(fp, "%s ", nonterm_names[symbol - 100]);
else{
if(token_hasvalue(symbol))
print_value(fp, symbol, value);
else
fprintf(fp, "%s ", token_names[symbol]);
}
}
struct tree_node* create_parsetree(const char* src_file, const char* tokens_file) {
struct stack* stack = stack_init();
struct token token;
struct symbol_tree stree;
struct symbol_tree* stree_ptr;
FILE* sfp = fopen(src_file, "r");
if(sfp == NULL) {
fprintf(stderr, "Invalid file\n");
exit(-1);
}
FILE* tfp = fopen(tokens_file, "w+");
int status = gettok(sfp, &token);
union value zero_value;
stree.symbol = DOLLAR;
stack_pushval(stack, stree);
stree.symbol = Program;
stack_pushval(stack, stree);
struct tree_node* root = tree_init(NULL, Program, zero_value);
struct tree_node* temptree = root;
fprintf(tfp, "%6s\t%-20s\t%s\n", "(LINE, COL)", "TOKEN", "VALUE");
// write token to file
write_token(tfp, &token);
while(status != -1){
// return root node when succesful
if(status == 0 && stack_topval(stack) == DOLLAR) {
return root;
}
if(stack_topval(stack) == EPSILON) {
stack_pop(stack);
}else if(stack_topval(stack) < 100) {
stree_ptr = (struct symbol_tree*) stack_top(stack);
if(stree_ptr->symbol == token.type) {
if(token_hasvalue(token.type))
{
stree_ptr->root->value = token.value;
}
stack_pop(stack);
status = gettok(sfp, &token);
// write token to file
write_token(tfp, &token);
}
else {
printf("%d,%d Error in Terminal for Token %s. Expected Token %s\n",token.linenum,token.colnum,token_names[token.type],token_names[stack_topval(stack)]);
return NULL;
}
} else {
int rule = parse_table[stack_topval(stack) - 100][token.type];
int i = 0;
if(rule == -1) {
printf("%d,%d Error in Nonterminal for Token %s. Expected Token %s\n",token.linenum,token.colnum,token_names[token.type],nonterm_names[stack_topval(stack)-100]);
return NULL;
}
stack_pop(stack);
temptree = tree_traverse(root);
// End of Rule is marked by zero, since no rule has DOLLAR on RHS
int flag = 0;
while(rules[rule][i] != 0) {
temptree->children[i] = tree_init(temptree, rules[rule][i], zero_value);
i++;
}
temptree->children_count = i;
i--;
while(i != -1) {
stree.symbol = rules[rule][i];
stree.root = temptree->children[i];
stack_pushval(stack, stree);
i--;
}
}
}
if(status == -1) {
if(token.type >= 100)
printf("%s %d %d",nonterm_names[token.type-100],token.linenum,token.colnum);
else
printf("%s %d %d", token_names[token.type],token.linenum,token.colnum);
}
fclose(sfp);
fclose(tfp);
return NULL;
}