CCompiler/loader.cpp at master · MyAUTPrincipleOfProgrammingCourse/CCompiler · GitHub

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//
// Created by ahmad on 1/12/16.
//
#include<string.h>
#include"loader.h"
#include"errorgen.h"
#include<vector>

int tokenNum;

usingnamespacestd;

voidpreProces(FILE *outStream,char *src)
{
printf("%s\n",src);
FILE *srcFile = fopen(src,"r");
char c = fgetc(srcFile);
while (c != EOF){
if(c == '#') {
char preprocessLine[LINE_LEN_LIM];
fgets(preprocessLine,LINE_LEN_LIM,srcFile);
//printf("Line is %s\n",preprocessLine);
char *ppType = stringTokenizer(preprocessLine,'',0);
//printf("Type is %s\n",ppType);
if(strcmp(ppType,"include") == 0){
char *path;
 path = stringTokenizer(preprocessLine,34,1);
preProces(outStream,path);
 } else{
generateErr(0,ERR_UNKNOWN_PREPROCESS,ppType,src);
 }
 }else {
fputc(c, outStream);
 }
 c = fgetc(srcFile);
 }
}
token *loadfromfile(char *path)
{
FILE *file;
 file = fopen(path,"r"); // Open the file for reading the source from it
if(file == NULL)
 {
generateErr(NO_LINE_SPECIFIED,ERR_FILE_NOT_FOUND,path,"");
returnNULL;
 }

int currentLine = 1;
 tokenNum = 0;
 token *head = NULL;

 token *last = NULL;

 vector<char *> srcDef;
 vector<char *> destDef;

 token tok;

strcpy(tok.value,"");
strcpy(tok.fileName,path);

char chr = fgetc(file);

while((getType(chr) == SPACE_TOKEN) && (!feof(file))) {
if (chr == '\n') {
 currentLine++;
 }
 chr = fgetc(file);
 }

 tok.lineNumber = currentLine;
pushToStr(tok.value, chr);

int lastType = getType(chr);

while(!feof(file)){
 chr = fgetc(file);

if(chr == '\n') {
if(strlen(tok.value) != 0){
 tok.type = lastType;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 }
 currentLine++;
 tok.lineNumber = currentLine;
 lastType = UNKNOWN_TOKEN;

 }elseif(chr == '\t') {
if (strlen(tok.value) != 0) {
 tok.type = lastType;
pushToken(tok, &head, &last,&srcDef,&destDef);
strcpy(tok.value, "");
 }

 }elseif(getType(chr) == PUNC_TOKEN){
if(strlen(tok.value) != 0){
 tok.type = lastType;
 tok.lineNumber = currentLine;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 }

if(chr == 39){
pushToStr(tok.value,chr);
 chr = fgetc(file);
while((chr != 39) && (!feof(file) && (chr != '\n')) ){
pushToStr(tok.value,chr);
 chr = fgetc(file);
 }
pushToStr(tok.value,chr);
 lastType = CHAR_TOKEN;
 tok.type = lastType;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 } else{
 lastType = PUNC_TOKEN;
 tok.type = lastType;
pushToStr(tok.value,chr);
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 lastType = UNKNOWN_TOKEN;
 }
 }elseif(chr == '') {
if (strlen(tok.value) != 0) {
 tok.type = lastType;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value, "");
 }
 lastType = UNKNOWN_TOKEN;
 }elseif((getType(chr) == OPERATOR_TOKEN) && (lastType == NAME_TOKEN)){
 tok.type = lastType;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 lastType = OPERATOR_TOKEN;
pushToStr(tok.value,chr);
 }elseif((getType(chr) == NUM_TOKEN) && (lastType == OPERATOR_TOKEN)) {
 tok.type = lastType;
pushToken(tok, &head, &last, &srcDef, &destDef);
strcpy(tok.value, "");
 lastType = NUM_TOKEN;
pushToStr(tok.value, chr);
 }elseif((getType(chr) == NUM_TOKEN) && (lastType == UNKNOWN_TOKEN)) {
pushToStr(tok.value,chr);
 lastType = NUM_TOKEN;
 }elseif((getType(chr) == NAME_TOKEN) && (lastType == PUNC_TOKEN)){
if (strlen(tok.value) != 0){
 tok.type = lastType;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 lastType = NAME_TOKEN;
pushToStr(tok.value,chr);
 }
 }elseif((getType(chr) == NUM_TOKEN) && (lastType != NAME_TOKEN)) {
pushToStr(tok.value, chr);
 lastType = getType(chr);

 }elseif((lastType == OPERATOR_TOKEN) && (getType(chr) == NAME_TOKEN)){
if(strlen(tok.value) != 0){
 lastType = OPERATOR_TOKEN;
 tok.lineNumber = currentLine;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 }
 lastType = NAME_TOKEN;
pushToStr(tok.value,chr);
 }elseif(getType(chr) == OPERATOR_TOKEN){
if(lastType != OPERATOR_TOKEN)
 {
if(strlen(tok.value) != 0)
 {
 tok.type = lastType;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 }
 }
 lastType = OPERATOR_TOKEN;
pushToStr(tok.value,chr);
 }else{

if(lastType == UNKNOWN_TOKEN)
 lastType = getType(chr);

if(lastType != getType(chr)){
if((lastType == NAME_TOKEN) && (getType(chr) == NUM_TOKEN)){
 lastType = NAME_TOKEN;
pushToStr(tok.value,chr);
 } else{
if(strlen(tok.value) != 0){
 tok.type = lastType;
pushToken(tok,&head,&last,&srcDef,&destDef);
strcpy(tok.value,"");
 lastType = UNKNOWN_TOKEN;
 }
 }
 }else{
pushToStr(tok.value,chr);
 lastType = getType(chr);
 }
 }
 }
return head;
}

voidpushToken(token t, token **head, token **last,vector<char *> *srcDef, vector<char *> *destDef)
{
if(t.type == NAME_TOKEN)
 {
if(strcmp(t.value,"true") == 0){
strcpy(t.value,"1");
 t.type = NUM_TOKEN;
 }elseif(strcmp(t.value,"false") == 0){
strcpy(t.value,"0");
 t.type = NUM_TOKEN;
 }else{
 t.type = idOrKeyword(t.value);
 }

 }
// Check for the defined value and replace the defined value
for (int i = 0; i < srcDef->size(); ++i) {
if(strcmp(t.value,(*srcDef)[i]) == 0)
 {
strcpy(t.value,(*destDef)[i]);
break;
 }
 }

if(strlen(t.value) == 0)
return;

if(tokenNum == 0)
 {
 (*head) = (token *)malloc(sizeof(token));
 (*last) = (*head);
 (*head)->type = t.type;
 (*head)->lineNumber = t.lineNumber;
strcpy((*head)->value, t.value);
 (*head)->next = NULL;
 }else{
 (*last)->next = (token *)malloc(sizeof(token));
 (*last) = (*last)->next;
strcpy((*last)->value, t.value);
 (*last)->lineNumber = t.lineNumber;
 (*last)->type = t.type;
 (*last)->next = NULL;
 }
 tokenNum ++;
}

intgetType(char chr)
{
if((chr >= 'A') && (chr <= 'Z'))
returnNAME_TOKEN;

if(chr == '_')
returnNAME_TOKEN;

if((chr >= 'a') && (chr <= 'z'))
returnNAME_TOKEN;

if ((chr >= '0') && (chr <= '9'))
returnNUM_TOKEN;
if (chr == '.')
returnNUM_TOKEN;

if ((chr == '+') || (chr == '-') ||
 (chr == '=') || (chr == '*') ||
 (chr == '/') || (chr == '>') ||
 (chr == '<') || (chr == '!') ||
 (chr == '&') || (chr == '|') ||
 (chr == '%')
 )
returnOPERATOR_TOKEN;

if ((chr == '+') || (chr == '-') ||
 (chr == ',' ) || (chr == '"') ||
 (chr == '(') || (chr == ')') ||
 (chr == '{') || (chr == '}') ||
 (chr == 39) || // stands for the ' character
 (chr == ';'))
returnPUNC_TOKEN;

if((chr == '') || (chr == '\n') || (chr == '\t'))
returnSPACE_TOKEN;

if(chr == '#')
returnPREPRO_TOKEN;
}

voidpushToStr(char *str,char chr)
{
int len = strlen(str);
 str[len] = chr;
 str[len + 1] = 0;
}

token *gotoLastNode(token *head)
{
 token *ptr = head;
while (ptr->next != NULL)
 {
 ptr = ptr->next;
 }
return ptr;
}

char *stringTokenizer(char *string,char delim,int tokeN)
{
char *res = (char *)malloc(STR_LEN_LIM * sizeof(char));
strcpy(res,"");
int j = 0;
int k;
for (int i = 0; i < tokeN; ++i) {
while (string[j] != delim){
 j++;
if(j == strlen(string))
returnNULL;
 }
 j++;
 }
 k = j;
while (string[k] != delim){
 k++;
if(k == strlen(string))
break;
 }
 k--;
for (int l = 0; l < (k - j + 1); ++l) {
 res[l] = string[j + l];
 }
 res[k - j + 1] = 0;

return res;
}

intidOrKeyword(char *value)
{
if(strcmp(value,"int") == 0) {
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"float") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"char") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"bool") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"void") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"while") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"if") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"else") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"main") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"NULL") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"min") == 0){
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"max") == 0) {
returnKEYWORD_TOKEN;
 }elseif(strcmp(value,"return") == 0) {
returnKEYWORD_TOKEN;
 }else{
returnIDENTIFIER_TOKEN;
 }
}

token *getLastToken(token *start,token *dest)
{
 token *ptr = start;
while (ptr->next != dest)
 ptr = ptr->next;

return ptr;
}