changes modulus

temp.c

@@ -24,11 +24,11 @@ int readercount = 0;
 unsigned modulus( unsigned char *num, size_t size, unsigned divisor) {
   unsigned rem = 0;
   
-  while (size-- > 0) {
-    rem = ((UCHAR_MAX + 1ULL)*rem + *num) % divisor;
-    num++;
-  }
-  return rem;
+ while(size>0)
+ {
+     rem+=num[size--]%divisor;
+ }
+  return rem%divisor;
 }
 void file_del( char *key)
 {   
@@ -109,48 +109,33 @@ off_t file_put(char *key,char *value)
         if not present then search for empty line and insert there!
      */
     unsigned int index=modulus(key,256,setSize);
-    lseek(fds[index],0,SEEK_SET);
     off_t position;
     //sem_wait(&mutex[index]);
     printf("[Write to File: %d]\n",index);
     char *line;
     char lin[514];
+    char blankspace[513];
+    memset(blankspace, 0, sizeof(blankspace));
     size_t len=0;
     FILE *fp=fdopen(fds[index],"rb+");
-    position=ftell(fp);
     while ((getline(&line, &len, fp)) != -1)
     {
+        int temp =strlen(line);
         char *fkey=strtok(line,":"); 
-        char *fvalue=strtok(NULL,":");
-         printf("key:(%s)(%s)\n",fkey,key);
-        if(strcmp(key,fkey)==0){
-            if(strcmp(value,strtok(fvalue,"\n"))==0)
-            {
-                printf("(%s)(%s)\n",fkey,key);
-               ///everything same then why insert?
-               return 0;
-            }
-            else
-            {
-               
-                printf("value:(%s)(%s)\n",fvalue,value);
-                fflush(stdout);
-                fseek(fp,position,SEEK_SET);
-                snprintf(lin, sizeof(lin),"%s:%s\n",key,value);
-                if(fputs(lin,fp)<0)
-                    printf("\n[unable to perform file_put]\n");
-                return 0;
-            }
+        if(strcmp(key,fkey)==0)
+        {
+            fseek(fp,position,SEEK_SET);
+            fwrite(blankspace,sizeof(blankspace),temp,fp);
+            break;
         }
-        position=ftell(fp); 
-    }     
-    snprintf(lin, sizeof(lin),"%s:%s\n",key,value);
-    if(write(fds[index], lin, strlen(lin))<0)
-        printf("\n[unable to perform file_put]\n");
+        position=ftell(fp);
+    }
     
-
-   // sem_post(&mutex[index]);
-
+    snprintf(lin,sizeof(lin),"%s:%s\n",key,value);
+    fwrite(lin,sizeof(lin),strlen(lin),fp);
+   
+   
+    //sem_post(&mutex[index]);
     return position;
 }
 int main()
@@ -187,10 +172,12 @@ int main()
         sem_init(&mutex[i],0,1);
         readCounters[i]=0;
     }
+    printf("%u",modulus("99",256,setSize));
+
     //offset = file_put("24", "value245");
-    offset = file_put("24", "value1");
-    file_put("29","update2");
-    file_put("28","update2");
+    //offset = file_put("24", "value1");
+   //file_put("23","update1");
+   //file_put("24","update6969");
     //file_get(prevkey, value);   // Doesnot depend on key arg, returns key and value at offset 0
     //printf("(%s)", value);
     //file_del("29");