diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9b570c3..ef76b19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased](https://github.com/dalance/sv-parser/compare/v0.4.2...Unreleased) - ReleaseDate
 
+* [Added] parse_sv_str/parse_lib_str
+
 ## [v0.4.2](https://github.com/dalance/sv-parser/compare/v0.4.1...v0.4.2) - 2019-11-12
 
 * [Added] re-export DefineText
diff --git a/sv-parser-pp/src/preprocess.rs b/sv-parser-pp/src/preprocess.rs
index 12efa79..c06a445 100644
--- a/sv-parser-pp/src/preprocess.rs
+++ b/sv-parser-pp/src/preprocess.rs
@@ -127,7 +127,7 @@ pub fn preprocess<T: AsRef<Path>, U: AsRef<Path>>(
     preprocess_str(&s, path, pre_defines, include_paths)
 }
 
-fn preprocess_str<T: AsRef<Path>, U: AsRef<Path>>(
+pub fn preprocess_str<T: AsRef<Path>, U: AsRef<Path>>(
     s: &str,
     path: T,
     pre_defines: &Defines,
diff --git a/sv-parser/src/lib.rs b/sv-parser/src/lib.rs
index f1b7b4a..73da5fa 100644
--- a/sv-parser/src/lib.rs
+++ b/sv-parser/src/lib.rs
@@ -7,7 +7,9 @@ use std::fmt;
 use std::path::{Path, PathBuf};
 pub use sv_parser_error::{Error, ErrorKind};
 use sv_parser_parser::{lib_parser, sv_parser, Span, SpanInfo};
-pub use sv_parser_pp::preprocess::{preprocess, Define, DefineText, Defines, PreprocessedText};
+pub use sv_parser_pp::preprocess::{
+    preprocess, preprocess_str, Define, DefineText, Defines, PreprocessedText,
+};
 pub use sv_parser_syntaxtree::*;
 
 pub struct SyntaxTree {
@@ -122,6 +124,43 @@ pub fn parse_sv<T: AsRef<Path>, U: AsRef<Path>>(
     }
 }
 
+pub fn parse_sv_str<T: AsRef<Path>, U: AsRef<Path>>(
+    s: &str,
+    path: T,
+    pre_defines: &HashMap<String, Option<Define>>,
+    include_paths: &[U],
+) -> Result<(SyntaxTree, Defines), Error> {
+    let (text, defines) = preprocess_str(s, path, pre_defines, include_paths)?;
+    let span = Span::new_extra(text.text(), SpanInfo::default());
+    let result = all_consuming(sv_parser)(span);
+    match result {
+        Ok((_, x)) => Ok((
+            SyntaxTree {
+                node: x.into(),
+                text,
+            },
+            defines,
+        )),
+        Err(x) => {
+            let pos = match x {
+                nom::Err::Incomplete(_) => None,
+                nom::Err::Error(e) => error_position(&e),
+                nom::Err::Failure(e) => error_position(&e),
+            };
+            let origin = if let Some(pos) = pos {
+                if let Some(origin) = text.origin(pos) {
+                    Some((origin.0.clone(), origin.1))
+                } else {
+                    None
+                }
+            } else {
+                None
+            };
+            Err(ErrorKind::Parse(origin).into())
+        }
+    }
+}
+
 pub fn parse_lib<T: AsRef<Path>, U: AsRef<Path>>(
     path: T,
     pre_defines: &HashMap<String, Option<Define>>,
@@ -158,6 +197,43 @@ pub fn parse_lib<T: AsRef<Path>, U: AsRef<Path>>(
     }
 }
 
+pub fn parse_lib_str<T: AsRef<Path>, U: AsRef<Path>>(
+    s: &str,
+    path: T,
+    pre_defines: &HashMap<String, Option<Define>>,
+    include_paths: &[U],
+) -> Result<(SyntaxTree, Defines), Error> {
+    let (text, defines) = preprocess_str(s, path, pre_defines, include_paths)?;
+    let span = Span::new_extra(text.text(), SpanInfo::default());
+    let result = all_consuming(lib_parser)(span);
+    match result {
+        Ok((_, x)) => Ok((
+            SyntaxTree {
+                node: x.into(),
+                text,
+            },
+            defines,
+        )),
+        Err(x) => {
+            let pos = match x {
+                nom::Err::Incomplete(_) => None,
+                nom::Err::Error(e) => error_position(&e),
+                nom::Err::Failure(e) => error_position(&e),
+            };
+            let origin = if let Some(pos) = pos {
+                if let Some(origin) = text.origin(pos) {
+                    Some((origin.0.clone(), origin.1))
+                } else {
+                    None
+                }
+            } else {
+                None
+            };
+            Err(ErrorKind::Parse(origin).into())
+        }
+    }
+}
+
 #[macro_export]
 macro_rules! unwrap_node {
     ($n:expr, $( $ty:tt ),+) => {{