init commit

Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "qr"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+readme = "README.md"
+description = "QR cli"
+license = "MIT"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+qrcode = { version = "0.11.2", default-features = false }

src/main.rs

@@ -0,0 +1,43 @@
+use qrcode::QrCode;
+
+const W: &str = " ";
+const B: &str = " ";
+
+fn main() {
+    let code = QrCode::new(b"https://hatter.ink/").unwrap();
+    let string = code.render::<char>()
+        .quiet_zone(false)
+        .module_dimensions(2, 1)
+        .build();
+    let mut output_stirng = String::with_capacity(1024);
+    let mut ln_len = 0;
+    for c in string.chars() {
+        if c == '█' || c == ' ' {
+            ln_len += 1;
+        } else {
+            break;
+        }
+    }
+    for _ in 0..ln_len+2 {
+        output_stirng.push_str(W);
+    }
+    output_stirng.push('\n');
+    output_stirng.push_str(W);
+    for c in string.chars() {
+        if c == '█' {
+            output_stirng.push_str(B);
+        } else if c == ' ' {
+            output_stirng.push_str(W);
+        } else {
+            output_stirng.push_str(W);
+            output_stirng.push(c);
+            output_stirng.push_str(W);
+        }
+    }
+    output_stirng.push_str(W);
+    output_stirng.push('\n');
+    for _ in 0..ln_len+2 {
+        output_stirng.push_str(W);
+    }
+    println!("{}", output_stirng);
+}