From 97e0916e3622cd376b76ad412550b90560a17d84 Mon Sep 17 00:00:00 2001
From: ml5376 <ge65pov@mytum.de>
Date: Sat, 13 Nov 2021 19:41:02 +0100
Subject: [PATCH] .
---
README.md | 2 +-
src/main.cpp | 8 ++++++++
src/sum.cpp | 2 +-
3 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/README.md b/README.md
index 9abab65..c6ad3a2 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# FDE Exercise 2.4
+~# FDE Exercise 2.4
## Task
diff --git a/src/main.cpp b/src/main.cpp
index fdb2a42..fd7b12d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,5 +1,7 @@
#include <iostream>
#include <string>
+#include<sys/mman.h>
+#include <thread>
#include "sum.hpp"
@@ -8,8 +10,14 @@ int main(int argc, char* argv[]) {
std::cout << "Usage: " << argv[0] << " <lineitem.tbl>";
return 1;
}
+ int handle=open(argv[1],O_RDONLY);
+ auto size=lseek(handle,0,SEEK_END);
+ auto mapping_size=size+8;
+ auto data=mmap(nullptr,mapping_size,PROT_READ,MAP_SHARED,handle,0);
int64_t price_sum = sum_extendedprice(argv[1]);
std::cout << price_sum << std::endl;
+ munmap(data,mapping_size);
+ close(handle);
return 0;
}
diff --git a/src/sum.cpp b/src/sum.cpp
index dd645cd..d2cb20f 100644
--- a/src/sum.cpp
+++ b/src/sum.cpp
@@ -25,7 +25,7 @@ int64_t sum_extendedprice(const std::string& file_name) {
uint64_t field_number = 0;
for (auto row : lineitem) {
//-- TODO exercise sheet 2 Task 4.2
- // your code goes here
+ price_sum+=ToInt(row[5]);
//--
}
return price_sum;
--
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