From 5e82edeaf12143d0fa0cff13aef805d13065409f Mon Sep 17 00:00:00 2001
From: wangmengc <wangmengc@uniontech.com>
Date: Thu, 23 May 2024 14:02:44 +0800
Subject: [PATCH] add exp3 function

---
 utshell-0.5/r_expr/src/lib.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/utshell-0.5/r_expr/src/lib.rs b/utshell-0.5/r_expr/src/lib.rs
index 8aa4160a..1e6960b9 100644
--- a/utshell-0.5/r_expr/src/lib.rs
+++ b/utshell-0.5/r_expr/src/lib.rs
@@ -594,3 +594,25 @@ unsafe extern "C" fn expmuldiv() -> intmax_t {
     return val1;
 }
 
+#[no_mangle]
+unsafe extern "C" fn exp3() -> intmax_t {
+    let mut val1: intmax_t = 0;
+    let mut val2: intmax_t = 0;
+    val1 = expmuldiv();
+    while curtok == '+' as i32 || curtok == '-' as i32 {
+        let mut op: libc::c_int = curtok;
+        readtok();
+        val2 = expmuldiv();
+        if op == '+' as i32 {
+            val1 += val2;
+        } else if op == '-' as i32 {
+            val1 -= val2;
+        }
+        lasttok = NUM as libc::c_int;
+    }
+    return val1;
+}
+
+
+
+
-- 
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