From 34d115d883c167731269a93e8439ecf9552be3e4 Mon Sep 17 00:00:00 2001
From: shove <shove@163.com>
Date: Tue, 11 Oct 2022 12:48:26 +0800
Subject: [PATCH] cgen: fix wrong when string attributes with quotes (fix
 #15194) (#16020)

---
 vlib/v/gen/c/comptime.v                             |  3 +++
 vlib/v/gen/c/testdata/attr_string_quotes_escape.out |  7 +++++++
 vlib/v/gen/c/testdata/attr_string_quotes_escape.vv  | 11 +++++++++++
 vlib/v/gen/c/utils.v                                | 12 ++++++++++++
 4 files changed, 33 insertions(+)
 create mode 100644 vlib/v/gen/c/testdata/attr_string_quotes_escape.out
 create mode 100644 vlib/v/gen/c/testdata/attr_string_quotes_escape.vv

diff --git a/vlib/v/gen/c/comptime.v b/vlib/v/gen/c/comptime.v
index 40d85f77ee..500aed8d9d 100644
--- a/vlib/v/gen/c/comptime.v
+++ b/vlib/v/gen/c/comptime.v
@@ -202,6 +202,9 @@ fn cgen_attrs(attrs []ast.Attr) []string {
 		if attr.arg.len > 0 {
 			s += ': $attr.arg'
 		}
+		if attr.kind == .string {
+			s = escape_quotes(s)
+		}
 		res << '_SLIT("$s")'
 	}
 	return res
diff --git a/vlib/v/gen/c/testdata/attr_string_quotes_escape.out b/vlib/v/gen/c/testdata/attr_string_quotes_escape.out
new file mode 100644
index 0000000000..261e944604
--- /dev/null
+++ b/vlib/v/gen/c/testdata/attr_string_quotes_escape.out
@@ -0,0 +1,7 @@
+FunctionData{
+    name: 'sample_method'
+    attrs: ['option: "1"']
+    args: []
+    return_type: 1
+    typ: 0
+}
diff --git a/vlib/v/gen/c/testdata/attr_string_quotes_escape.vv b/vlib/v/gen/c/testdata/attr_string_quotes_escape.vv
new file mode 100644
index 0000000000..a4fd8636b5
--- /dev/null
+++ b/vlib/v/gen/c/testdata/attr_string_quotes_escape.vv
@@ -0,0 +1,11 @@
+struct Dummy {}
+
+['option: "1"']
+fn (d Dummy) sample_method() {
+}
+
+fn main() {
+	$for method in Dummy.methods {
+		println(method)
+	}
+}
diff --git a/vlib/v/gen/c/utils.v b/vlib/v/gen/c/utils.v
index e61bb6214c..aaef3ea208 100644
--- a/vlib/v/gen/c/utils.v
+++ b/vlib/v/gen/c/utils.v
@@ -83,3 +83,15 @@ fn (mut g Gen) fn_var_signature(return_type ast.Type, arg_types []ast.Type, var_
 	sig += ')'
 	return sig
 }
+
+// escape quotes for string
+fn escape_quotes(val string) string {
+	bs := '\\'
+	unescaped_val := val.replace('$bs$bs', '\x01').replace_each([
+		"$bs'",
+		"'",
+		'$bs"',
+		'"',
+	])
+	return unescaped_val.replace_each(['\x01', '$bs$bs', "'", "$bs'", '"', '$bs"'])
+}