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tokenizer.c
428 lines (399 loc) · 11.9 KB
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tokenizer.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h> //this include is for all the function calls I will be using thats built in C, such as isdigit(), isalpha(), isalnum(),
int end = 0;
struct TokenizerT_ {
int pindex; //pointer to the index of current array
char *str; //string input
};
typedef struct TokenizerT_ TokenizerT;
TokenizerT *TKCreate( char * ts ) {
//starts to create allocation for tokenizer
TokenizerT *function = (TokenizerT*)malloc(sizeof(TokenizerT));
function->str =(char*)malloc(sizeof(char)*(1+(strlen(ts)))); //allocates space for the array of str
strcpy(function->str, ts); //copies string from user input into string input field
function->pindex = 0;//set our currrent pointer position to 0 so we can use later to traverse the whole string
return function;
}
void TKDestroy( TokenizerT * tk ) {
free(tk->str);
free(tk);
return;
}
char *getFloat(TokenizerT * tk, char* tmp, int charIndex){
int ecount = 0; // makes sure e notation will only appear once
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
while(isdigit(tk->str[tk->pindex]) || tk->str[tk->pindex] == 'e'){
if(tk->str[tk->pindex] == 'e'){
if(ecount == 1){
break;
}
ecount = 1;
if(isdigit(tk->str[tk->pindex + 1]) || tk->str[tk->pindex + 1] == '-'){
if(isdigit(tk->str[tk->pindex + 2])){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
}else{
break;
}
}else{
break;
}
}else{
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
}
}
printf("float \"%s\"\n", tmp);
return tmp;
}
char *getHex(TokenizerT * tk, char* tmp, int charIndex){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
while(isdigit(tk->str[tk->pindex]) || tk->str[tk->pindex] == 'a' || tk->str[tk->pindex] == 'b' || tk->str[tk->pindex] == 'c' || tk->str[tk->pindex] == 'd' || tk->str[tk->pindex] == 'e' || tk->str[tk->pindex] == 'f'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
}
printf("hex integer \"%s\"\n", tmp);
return tmp;
}
char *getOctal(TokenizerT * tk, char* tmp, int charIndex){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
while(tk->str[tk->pindex] == '0' || tk->str[tk->pindex] == '1' || tk->str[tk->pindex] == '2' || tk->str[tk->pindex] == '3' || tk->str[tk->pindex] == '4' || tk->str[tk->pindex] == '5' || tk->str[tk->pindex] == '6' || tk->str[tk->pindex] == '7'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
}
printf("octal integer \"%s\"\n", tmp);
return tmp;
}
char *getNumber(TokenizerT * tk, char* tmp, int charIndex){
while(isdigit(tk->str[tk->pindex])){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
}
if(tk->str[tk->pindex] == '.' && isdigit(tk->str[tk->pindex + 1])){ // checks for float
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
tmp = getFloat(tk, tmp, charIndex);
return tmp;
}
printf("decimal \"%s\"\n", tmp);
return tmp;
}
char *getWord(TokenizerT * tk, char* tmp, int charIndex){
while(isalnum(tk->str[tk->pindex])){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
}
printf("word \"%s\"\n", tmp);
return tmp;
}
char *getOp(TokenizerT * tk, char* tmp, int charIndex){
tmp[charIndex] = tk->str[tk->pindex];
if(tk->str[tk->pindex] == '>'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '>'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("right-shift assignment \"%s\"\n", tmp);
}else{
charIndex++;
tk->pindex++;
printf("shift right \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
printf("greater or equal \"%s\"\n", tmp);
}else{
printf("greater than \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '<'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '<'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("left shift assignment \"%s\"\n", tmp);
}else{
charIndex++;
tk->pindex++;
printf("left shift \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("less or equal \"%s\"\n", tmp);
}else{
printf("less than \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '='){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("equals \"%s\"\n", tmp);
}else{
printf("simple assignment \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '!'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("not equals \"%s\"\n", tmp);
}else{
printf("negate \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '&'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '&'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("logical and \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("bitwise and assignment \"%s\"\n", tmp);
}else{
printf("address or bitwise and \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '|'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '|'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("logical or \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("bitwise inclusive or assignment \"%s\"\n", tmp);
}else{
printf("bitwise or \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '^'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("bitwise exclusive or assignment \"%s\"\n", tmp);
}else{
printf("bitwise exclusive or \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '+'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '+'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("inc \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] =='='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("addition assignment \"%s\"\n", tmp);
}else{
printf("add \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '-'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '-'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("dec \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] =='='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("subtraction assignment \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '>'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("structure pointer \"%s\"\n", tmp);
}else{
printf("minus \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '*'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("multiplication assignment \"%s\"\n", tmp);
}else{
printf("multiply or indirect \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '/'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("division assignment \"%s\"\n", tmp);
}else{
printf("divide \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '%'){
charIndex++;
tk->pindex++;
if(tk->str[tk->pindex] == '='){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
printf("remainder assignment \"%s\"\n", tmp);
}else{
printf("modulus \"%s\"\n", tmp);
}
}else if(tk->str[tk->pindex] == '('){
charIndex++;
tk->pindex++;
printf("left parentheses \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == ')'){
charIndex++;
tk->pindex++;
printf("right parentheses \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '['){
charIndex++;
tk->pindex++;
printf("left brace \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == ']'){
charIndex++;
tk->pindex++;
printf("right brace \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '{'){
charIndex++;
tk->pindex++;
printf("left bracket \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '}'){
charIndex++;
tk->pindex++;
printf("right bracket \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '~'){
charIndex++;
tk->pindex++;
printf("1's comp \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == '.'){
charIndex++;
tk->pindex++;
printf("structure member \"%s\"\n", tmp);
}else if(tk->str[tk->pindex] == ','){
charIndex++;
tk->pindex++;
printf("comma \"%s\"\n", tmp);
}else{
charIndex++;
tk->pindex++;
printf("bad token \"%s\"\n", tmp);
}
return tmp;
}
char *TKGetNextToken( TokenizerT * tk ) {
if(tk->str[tk->pindex] == ' ' || tk->str[tk->pindex] == '\t' || tk->str[tk->pindex] == '\v' || tk->str[tk->pindex] == '\f' || tk->str[tk->pindex] == '\n' || tk->str[tk->pindex] == '\r'){
tk->pindex++;
return NULL;
}
int charIndex = 0;
char *tmp = (char*)malloc(sizeof(char)*strlen(tk->str));
if(isalnum(tk->str[tk->pindex])){
if(isalpha(tk->str[tk->pindex])){ //checks for word
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
tmp = getWord(tk, tmp, charIndex);
return tmp;
}else{
if(tk->str[tk->pindex] == '0' && isalnum(tk->str[tk->pindex + 1])){ //checks for hex
if(tk->str[tk->pindex + 1] == 'x' || tk->str[tk->pindex + 1] == 'X'){
if(isdigit(tk->str[tk->pindex + 2]) || tk->str[tk->pindex + 2] == 'a' || tk->str[tk->pindex + 2] == 'b' || tk->str[tk->pindex + 2] == 'c' || tk->str[tk->pindex + 2] == 'd' || tk->str[tk->pindex + 2] == 'e' || tk->str[tk->pindex + 2] == 'f'){
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
tmp = getHex(tk, tmp, charIndex);
return tmp;
}
}else if(tk->str[tk->pindex + 1] == '0' || tk->str[tk->pindex + 1] == '1' || tk->str[tk->pindex + 1] == '2' || tk->str[tk->pindex + 1] == '3' || tk->str[tk->pindex + 1] == '4' || tk->str[tk->pindex + 1] == '5' || tk->str[tk->pindex + 1] == '6' || tk->str[tk->pindex + 1] == '7'){ // checks for octal
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
tmp = getOctal(tk, tmp, charIndex);
return tmp;
}
}
}
//if not sends to number(decimal or floats)
tmp[charIndex] = tk->str[tk->pindex];
charIndex++;
tk->pindex++;
tmp = getNumber(tk, tmp, charIndex);
return tmp;
}else{
// C-Operators
tmp = getOp(tk, tmp, charIndex);
}
return tmp;
}
int main(int argc, char **argv) {
//Starts with error check if no string at all is inputted return print.
if (argc ==1){
printf("no String inputted\n");
return 0;
}
if (argc ==3) {
printf("Please input ONE set of strings \n");
return 0;
}
char* string= argv[1];
TokenizerT *finaltok = TKCreate(string); //creates the string array into stream
char* datToke; //char array that is sent over after TKGetNextToken
while(finaltok->str[finaltok->pindex] != '\0'){
datToke = TKGetNextToken(finaltok);
}
TKDestroy(finaltok);
free(datToke);
return 0;
}