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authorAdam Carpenter <gitlab@53hor.net>2019-07-09 15:14:04 -0400
committerAdam Carpenter <gitlab@53hor.net>2019-07-09 15:14:04 -0400
commit7e8ee5ed9cad6484e9f13f81731b102ced58402e (patch)
tree5395402ab07bbb5a659dbd68c701e22a1227202f /meap/meap-code/ch6/ch6-memscan-2
downloadlearning-rust-7e8ee5ed9cad6484e9f13f81731b102ced58402e.tar.xz
learning-rust-7e8ee5ed9cad6484e9f13f81731b102ced58402e.zip
Init.
Diffstat (limited to 'meap/meap-code/ch6/ch6-memscan-2')
-rwxr-xr-xmeap/meap-code/ch6/ch6-memscan-2/Cargo.lock4
-rwxr-xr-xmeap/meap-code/ch6/ch6-memscan-2/Cargo.toml6
-rwxr-xr-xmeap/meap-code/ch6/ch6-memscan-2/src/main.rs14
3 files changed, 24 insertions, 0 deletions
diff --git a/meap/meap-code/ch6/ch6-memscan-2/Cargo.lock b/meap/meap-code/ch6/ch6-memscan-2/Cargo.lock
new file mode 100755
index 0000000..8650077
--- /dev/null
+++ b/meap/meap-code/ch6/ch6-memscan-2/Cargo.lock
@@ -0,0 +1,4 @@
+[[package]]
+name = "ch6-memscan-2"
+version = "0.1.0"
+
diff --git a/meap/meap-code/ch6/ch6-memscan-2/Cargo.toml b/meap/meap-code/ch6/ch6-memscan-2/Cargo.toml
new file mode 100755
index 0000000..02e76db
--- /dev/null
+++ b/meap/meap-code/ch6/ch6-memscan-2/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "ch6-memscan-2"
+version = "0.1.0"
+authors = ["Tim McNamara <code@timmcnamara.co.nz>"]
+
+[dependencies]
diff --git a/meap/meap-code/ch6/ch6-memscan-2/src/main.rs b/meap/meap-code/ch6/ch6-memscan-2/src/main.rs
new file mode 100755
index 0000000..3784436
--- /dev/null
+++ b/meap/meap-code/ch6/ch6-memscan-2/src/main.rs
@@ -0,0 +1,14 @@
+fn main() {
+ let mut n_nonzero = 0;
+
+ for i in 1..10000 { // <1>
+ let ptr = i as *const u8;
+ let byte_at_addr = unsafe { *ptr };
+
+ if byte_at_addr != 0 {
+ n_nonzero += 1;
+ }
+ }
+
+ println!("non-zero bytes in memory: {}", n_nonzero);
+} \ No newline at end of file