Add GN Build Files and Custom Modifications

Issue:https://gitee.com/openharmony/build/issues/I6UFTP
Signed-off-by: lubinglun <lubinglun@huawei.com>

BUILD.gn

@@ -0,0 +1,28 @@
+# Copyright (c) 2023 Huawei Device Co., Ltd.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import("//build/ohos.gni")
+
+ohos_cargo_crate("lib") {
+    crate_name = "cexpr"
+    crate_type = "rlib"
+    crate_root = "src/lib.rs"
+
+    sources = ["src/lib.rs"]
+    edition = "2018"
+    cargo_pkg_version = "0.5.0"
+    cargo_pkg_authors = "Jethro Beekman <jethro@jbeekman.nl>"
+    cargo_pkg_name = "cexpr"
+    cargo_pkg_description = "A C expression parser and evaluator"
+    deps = ["//third_party/rust/crates/nom:lib"]
+}

src/expr.rs

@@ -308,7 +308,7 @@ impl<'a> PRef<'a> {
             pair(complete(one_of_punctuation(&["*", "/", "%"][..])), |i| {
                 self.unary(i)
             }),
-            acc,
+            move || acc.clone(),
             |mut acc, (op, val): (&[u8], EvalResult)| {
                 match op[0] as char {
                     '*' => acc *= &val,
@@ -327,7 +327,7 @@ impl<'a> PRef<'a> {
             pair(complete(one_of_punctuation(&["+", "-"][..])), |i| {
                 self.mul_div_rem(i)
             }),
-            acc,
+            move || acc.clone(),
             |mut acc, (op, val): (&[u8], EvalResult)| {
                 match op[0] as char {
                     '+' => acc += &val,
@@ -345,7 +345,7 @@ impl<'a> PRef<'a> {
             pair(complete(one_of_punctuation(&["<<", ">>"][..])), |i| {
                 self.add_sub(i)
             }),
-            acc,
+            move || acc.clone(),
             |mut acc, (op, val): (&[u8], EvalResult)| {
                 match op {
                     b"<<" => acc <<= &val,
@@ -361,7 +361,7 @@ impl<'a> PRef<'a> {
         let (input, acc) = self.shl_shr(input)?;
         numeric(fold_many0(
             preceded(complete(p("&")), |i| self.shl_shr(i)),
-            acc,
+            move || acc.clone(),
             |mut acc, val: EvalResult| {
                 acc &= &val;
                 acc
@@ -373,7 +373,7 @@ impl<'a> PRef<'a> {
         let (input, acc) = self.and(input)?;
         numeric(fold_many0(
             preceded(complete(p("^")), |i| self.and(i)),
-            acc,
+            move || acc.clone(),
             |mut acc, val: EvalResult| {
                 acc ^= &val;
                 acc
@@ -385,7 +385,7 @@ impl<'a> PRef<'a> {
         let (input, acc) = self.xor(input)?;
         numeric(fold_many0(
             preceded(complete(p("|")), |i| self.xor(i)),
-            acc,
+            move || acc.clone(),
             |mut acc, val: EvalResult| {
                 acc |= &val;
                 acc

src/literal.rs

@@ -224,7 +224,7 @@ fn c_string(i: &[u8]) -> nom::IResult<&[u8], Vec<u8>> {
                 map(escaped_char, |c: CChar| c.into()),
                 map(is_not([b'\\', b'"']), |c: &[u8]| c.into()),
             )),
-            Vec::new(),
+            Vec::new,
             |mut v: Vec<u8>, res: Vec<u8>| {
                 v.extend_from_slice(&res);
                 v