feat: new tinywasm api

Signed-off-by: Henry Gressmann <mail@henrygressmann.de>

2 files changed, 36 insertions, 4 deletions

diff --git a/crates/parser/src/error.rs b/crates/parser/src/error.rs
index ee217c7..6fa9e25 100644
--- a/crates/parser/src/error.rs
+++ b/crates/parser/src/error.rs
@@ -1,3 +1,5 @@
+use core::fmt::Debug;
+
 use alloc::string::{String, ToString};
 use wasmparser::Encoding;
 
@@ -14,6 +16,29 @@ pub enum ParseError {
     Other(String),
 }
 
+impl Debug for ParseError {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        match self {
+            Self::InvalidType => write!(f, "invalid type"),
+            Self::UnsupportedSection(section) => write!(f, "unsupported section: {}", section),
+            Self::DuplicateSection(section) => write!(f, "duplicate section: {}", section),
+            Self::EmptySection(section) => write!(f, "empty section: {}", section),
+            Self::UnsupportedOperator(operator) => write!(f, "unsupported operator: {}", operator),
+            Self::ParseError { message, offset } => {
+                write!(f, "error parsing module: {} at offset {}", message, offset)
+            }
+            Self::InvalidEncoding(encoding) => write!(f, "invalid encoding: {:?}", encoding),
+            Self::InvalidLocalCount { expected, actual } => write!(
+                f,
+                "invalid local count: expected {}, actual {}",
+                expected, actual
+            ),
+            Self::EndNotReached => write!(f, "end of module not reached"),
+            Self::Other(message) => write!(f, "unknown error: {}", message),
+        }
+    }
+}
+
 impl From<wasmparser::BinaryReaderError> for ParseError {
     fn from(value: wasmparser::BinaryReaderError) -> Self {
         Self::ParseError {
diff --git a/crates/parser/src/lib.rs b/crates/parser/src/lib.rs
index 5b17fb8..6c49af0 100644
--- a/crates/parser/src/lib.rs
+++ b/crates/parser/src/lib.rs
@@ -18,7 +18,11 @@ use wasmparser::Validator;
 pub struct Parser {}
 
 impl Parser {
-    pub fn parse_module_bytes(wasm: &[u8]) -> Result<TinyWasmModule> {
+    pub fn new() -> Self {
+        Self {}
+    }
+
+    pub fn parse_module_bytes(&self, wasm: &[u8]) -> Result<TinyWasmModule> {
         let mut validator = Validator::new();
         let mut reader = ModuleReader::new();
 
@@ -34,18 +38,21 @@ impl Parser {
     }
 
     #[cfg(feature = "std")]
-    pub fn parse_module_file(path: impl AsRef<crate::std::path::Path>) -> Result<TinyWasmModule> {
+    pub fn parse_module_file(
+        &self,
+        path: impl AsRef<crate::std::path::Path>,
+    ) -> Result<TinyWasmModule> {
         use alloc::format;
         let f = crate::std::fs::File::open("log.txt").map_err(|e| {
             ParseError::Other(format!("Error opening file {:?}: {}", path.as_ref(), e))
         })?;
 
         let mut reader = crate::std::io::BufReader::new(f);
-        Self::parse_module_stream(&mut reader)
+        self.parse_module_stream(&mut reader)
     }
 
     #[cfg(feature = "std")]
-    pub fn parse_module_stream(mut stream: impl std::io::Read) -> Result<TinyWasmModule> {
+    pub fn parse_module_stream(&self, mut stream: impl std::io::Read) -> Result<TinyWasmModule> {
         use alloc::format;
 
         let mut validator = Validator::new();