添加 rpmvercmp(v1: &str, v2: &str) -> i32 {}

Signed-off-by: Jia Chao <jiachao2130@126.com>

src/lib.rs

@@ -5,6 +5,9 @@ use librpm::config;
 // use librpm
 pub mod rpm;
 
+// use librpmio;
+pub mod rpmio;
+
 // 使用 Once 对配置进行一次性地初始化
 static CONFIGURE: Once = Once::new();
 

src/rpmio.rs

@@ -0,0 +1,29 @@
+use std::ffi::CString;
+
+/// rpmvercmp 可对比两个软件包的版本
+/// 若 V1 大于 V2，则结果 > 0
+/// 若 V1 等于 V2，则结果 == 0
+/// 若 V1 小于 V2，则结果 < 0
+pub fn rpmvercmp(v1: &str, v2: &str) -> i32 {
+    let v1 = CString::new(v1).expect("?");
+    let v2 = CString::new(v2).expect("?");
+
+    unsafe { librpm_sys::rpmvercmp(v1.as_ptr(), v2.as_ptr()) }
+}
+
+#[test]
+fn test_rpmvercmp() {
+    let v1 = "5.10.0-60.ule3.x86_64";
+    let v2 = "5.10.0-96.ule3.x86_64";
+    let v3 = "5.10.0-108.ule3.x86_64";
+
+    let lt = rpmvercmp(v1, v2);
+    let eq = rpmvercmp(v2, v2);
+    let gt = rpmvercmp(v3, v2);
+
+    if lt < eq && eq < gt && eq == 0 {
+        assert!(true);
+    } else {
+        assert!(false);
+    }
+}