From b27bdf9410e11555672ba9fd649b8fd5c2497ba9 Mon Sep 17 00:00:00 2001
From: lquint <leo.quintrand@gmail.com>
Date: Tue, 20 Jul 2021 10:02:35 +0200
Subject: [PATCH] added bytes in classes

---
 class.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/class.c b/class.c
index 03659e9..aa170b5 100644
--- a/class.c
+++ b/class.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <math.h>
 
 void setBit(char *bits, int n)
 {
@@ -45,6 +46,65 @@ int isEscapedChar(char char1, char char2){
     else return ; //returning nothing for the moment, returning 0 printed weird character, no idea what to do
 }
 
+int hexaToDecimal(char hex1,char hex2){
+    char hex[2];
+    hex[0]=hex1;hex[1]=hex2;
+    long long decimal = 0, base = 1;
+    int i = 0, value, length;
+
+    length = 2;
+    for(i = length--; i >= 0; i--)
+    {
+        if(hex[i] >= '0' && hex[i] <= '9')
+        {
+            decimal += (hex[i] - 48) * base;
+            base *= 16;
+        }
+        else if(hex[i] >= 'A' && hex[i] <= 'F')
+        {
+            decimal += (hex[i] - 55) * base;
+            base *= 16;
+        }
+        else if(hex[i] >= 'a' && hex[i] <= 'f')
+        {
+            decimal += (hex[i] - 87) * base;
+            base *= 16;
+        }
+    }
+    return decimal;
+}
+
+int octalToDecimal(int octalNumber)
+{
+    int decimalNumber = 0, i = 0;
+
+    while(octalNumber != 0)
+    {
+        decimalNumber += (octalNumber%10) * pow(8,i);
+        ++i;
+        octalNumber/=10;
+    }
+
+    i = 1;
+
+    return decimalNumber;
+}
+
+int isByte(char char1, char char2, char char3, char char4){
+    if( char1=='\\' && char2=='x' && (char3<=55 && char3>=48) && ((char4<=57 && char4>=48) || (char4<=70 && char4>=65))){
+        printf("ouaiiiiis");
+        return hexaToDecimal(char3,char4);
+    } 
+    else if(char1=='\\' && (char2<=55 && char2>=48) && (char3<=55 && char3>=48) && (char4<=55 && char4>=48)){
+        int octal=((int)char2-48)*100+((int)char3-48)*10+(int)char4-48;
+        return octalToDecimal(octal);
+    }
+    else return 0 ;
+}
+
+
+
+
 char *classify(char *spec)
 {
     char *class= malloc(32);	// 256 bits indicating if character N (bit position N) is in the class or not
@@ -108,12 +168,18 @@ char *classify(char *spec)
            setBit(class,spec[index]);
            printf("added char : %c\n",spec[index]);
        }
+
+       else if(isByte(spec[index],spec[index+1],spec[index+2],spec[index+3])){
+           setBit(class,isByte(spec[index],spec[index+1],spec[index+2],spec[index+3]));
+           index=index+4;
+       }
        else if(isEscapedChar(spec[index],spec[index+1])!=0){
            if(isEscapedChar(spec[index],spec[index+1])==45){
                index++;
            }
            setBit(class,isEscapedChar(spec[index],spec[index+1]));
        }
+       
         printf("%c\n",spec[index]);
         printf("%i\n",index);
         index++;