From 6a349a0e0282e56b03adbe02b41bfaf0cc3213f1 Mon Sep 17 00:00:00 2001
From: mustafa salih <mustafasalih1991@gmail.com>
Date: Thu, 14 Jan 2021 05:41:01 +0300
Subject: orginized the code to seprated mods and deleted the lib file

---
 src/utils/memory.rs | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/utils/memory.rs

(limited to 'src/utils/memory.rs')

diff --git a/src/utils/memory.rs b/src/utils/memory.rs
new file mode 100644
index 0000000..1a6c982
--- /dev/null
+++ b/src/utils/memory.rs
@@ -0,0 +1,85 @@
+use crate::types::Config;
+use std::fs::File;
+use std::io::Read;
+
+/*
+mem_used = (mem_total + shmem - mem_free - mem_buffers - mem_cached - mem_srecl
+thanks for htop's developer on stackoverflow for providing this algorithm to
+calculate used memory.
+*/
+pub fn get_memory(config: &Config) -> Result<String, std::io::Error> {
+    let mut buf = String::new();
+
+    File::open("/proc/meminfo")?.read_to_string(&mut buf)?;
+
+    let mut mem_total: u32 = 0;
+    let mut shmem: u32 = 0;
+    let mut mem_free: u32 = 0;
+    let mut mem_buffers: u32 = 0;
+    let mut mem_cached: u32 = 0;
+    let mut mem_srecl: u32 = 0;
+
+    for line in buf.lines() {
+        if mem_total > 0
+            && shmem > 0
+            && mem_free > 0
+            && mem_buffers > 0
+            && mem_cached > 0
+            && mem_srecl > 0
+        {
+            break;
+        }
+        if line.starts_with("MemTotal") {
+            assign_val(line, &mut mem_total);
+        }
+        if line.starts_with("SReclaimable") {
+            assign_val(line, &mut mem_srecl)
+        }
+        if line.starts_with("Cached") {
+            assign_val(line, &mut mem_cached)
+        }
+
+        if line.starts_with("Shmem") {
+            assign_val(line, &mut shmem);
+        }
+
+        if line.starts_with("MemFree") {
+            assign_val(line, &mut mem_free);
+        }
+        if line.starts_with("Buffers") {
+            assign_val(line, &mut mem_buffers);
+        }
+    }
+
+    let mem_used = (mem_total + shmem - mem_free - mem_buffers - mem_cached - mem_srecl) / 1024;
+    let result: String;
+    if mem_used > 1000 {
+        result = format!(
+            "  {}  {:.1}G  {}",
+            config.memory.icon,
+            mem_used as f32 / 1000.0,
+            config.seperator
+        );
+    } else {
+        result = format!(
+            "  {}  {}M  {}",
+            config.memory.icon, mem_used, config.seperator
+        );
+    }
+    Ok(result)
+}
+
+/*
+this helper function will split the line(first argument) by the character(:)
+and then parse the right splited item as u32
+then assign that to the "assignable"(2nd argument).
+*/
+fn assign_val(line: &str, assignable: &mut u32) {
+    let parsed: u32 = line.split(':').collect::<Vec<&str>>()[1]
+        .trim()
+        .split(' ')
+        .collect::<Vec<&str>>()[0]
+        .parse()
+        .unwrap();
+    *assignable = parsed;
+}
-- 
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