Add proguard support

Cargo.toml

@@ -9,7 +9,8 @@ crate-type = ["cdylib", "rlib"]
 
 [dependencies]
 sourcemap = "0.14.0"
-error-chain = "0.5.0"
+proguard = "0.1.0"
+error-chain = "^0.9.0"
 memmap = "0.4.0"
 brotli2 = "0.2.1"
 varinteger = "1.0.2"

include/libsourcemap.h

@@ -3,6 +3,7 @@
 
 typedef void lsm_view_t;
 typedef void lsm_index_t;
+typedef void lsm_proguard_mapping_t;
 
 typedef struct lsm_token_s {
     unsigned int dst_line;
@@ -65,6 +66,12 @@ int lsm_view_or_index_from_json(char *bytes, unsigned int len,
                                 lsm_index_t **idx_out,
                                 lsm_error_t *err);
 
+lsm_proguard_mapping_t *lsm_proguard_mapping_from_bytes(char *bytes, size_t len, lsm_error_t *err);
+void lsm_proguard_mapping_free(lsm_proguard_mapping_t *view);
+int lsm_proguard_mapping_has_line_info(lsm_proguard_mapping_t *view, lsm_error_t *err);
+char *lsm_proguard_mapping_convert_dotted_path(
+    lsm_proguard_mapping_t *view, const char *path, int lineno, lsm_error_t *err);
+
 void lsm_buffer_free(char *buf);
 
 #endif

libsourcemap/__init__.py

@@ -1,4 +1,4 @@
-from .highlevel import from_json, View, Token, Index
+from .highlevel import from_json, View, Token, Index, ProguardView
 from .exceptions import SourceMapError, IndexedSourceMap, BadJson, \
     CannotFlatten, UnsupportedMemDbVersion, BadIo, MemDbDumpError, \
     TooManySources, TooManyNames, LocationOverflow, AlreadyMemDb

libsourcemap/highlevel.py

@@ -249,3 +249,59 @@ def __del__(self):
             self._ptr = None
         except Exception:
             pass
+
+
+class ProguardView(object):
+
+    def __init__(self):
+        raise TypeError('Cannot instanciate proguard views')
+
+    def _get_ptr(self):
+        if not self._ptr:
+            raise RuntimeError('View is closed')
+        return self._ptr
+
+    @staticmethod
+    def from_bytes(buffer):
+        """Creates a sourcemap view from a JSON string."""
+        buffer = to_bytes(buffer)
+        return ProguardView._from_ptr(rustcall(
+            _lib.lsm_proguard_mapping_from_bytes,
+            buffer, len(buffer)))
+
+    @property
+    def has_line_info(self):
+        """Returns true if the file has line information."""
+        return bool(rustcall(
+            _lib.lsm_proguard_mapping_has_line_info, self._get_ptr()))
+
+    def lookup(self, dotted_path, lineno=None):
+        """Given a dotted path in the format ``class_name`` or
+        ``class_name:method_name`` this performs an alias lookup.  For
+        methods the line number must be supplied or the result is
+        unreliaable.
+        """
+        rv = None
+        try:
+            rv = rustcall(
+                _lib.lsm_proguard_mapping_convert_dotted_path,
+                self._get_ptr(),
+                dotted_path.encode('utf-8'), lineno or 0)
+            return _ffi.string(rv).decode('utf-8', 'replace')
+        finally:
+            if rv is not None:
+                _lib.lsm_buffer_free(rv)
+
+    @staticmethod
+    def _from_ptr(ptr):
+        rv = object.__new__(ProguardView)
+        rv._ptr = ptr
+        return rv
+
+    def __del__(self):
+        try:
+            if self._ptr:
+                _lib.lsm_proguard_mapping_free(self._ptr)
+            self._ptr = None
+        except Exception:
+            pass

src/cabi.rs

@@ -6,6 +6,7 @@ use std::ffi::CStr;
 use std::borrow::Cow;
 use std::os::raw::{c_int, c_uint, c_char};
 
+use proguard::MappingView;
 use sourcemap::Error as SourceMapError;
 use errors::{Error, ErrorKind, Result};
 use unified::{View, TokenMatch, Index, ViewOrIndex};
@@ -42,11 +43,11 @@ pub struct CError {
 
 fn get_error_code_from_kind(kind: &ErrorKind) -> c_int {
     match *kind {
-        ErrorKind::SourceMapError(SourceMapError::IndexedSourcemap) => 2,
-        ErrorKind::SourceMapError(SourceMapError::BadJson(_, _, _)) => 3,
-        ErrorKind::SourceMapError(SourceMapError::CannotFlatten(_)) => 4,
+        ErrorKind::SourceMap(SourceMapError::IndexedSourcemap) => 2,
+        ErrorKind::SourceMap(SourceMapError::BadJson(_, _, _)) => 3,
+        ErrorKind::SourceMap(SourceMapError::CannotFlatten(_)) => 4,
         ErrorKind::UnsupportedMemDbVersion => 5,
-        ErrorKind::IoError(_) => 6,
+        ErrorKind::Io(_) => 6,
         ErrorKind::TooManySources => 20,
         ErrorKind::TooManyNames => 21,
         ErrorKind::LocationOverflow => 22,
@@ -272,3 +273,55 @@ export!(lsm_view_or_index_from_json(
         }
     }
 });
+
+export!(lsm_proguard_mapping_from_bytes(bytes: *const u8, len: c_uint)
+    -> Result<*mut MappingView<'static>>
+{
+    resultbox(MappingView::from_slice(slice::from_raw_parts(bytes, len as usize))?)
+});
+
+export!(lsm_proguard_mapping_free(view: *mut MappingView) {
+    if !view.is_null() {
+        Box::from_raw(view);
+    }
+});
+
+export!(lsm_proguard_mapping_has_line_info(view: *const MappingView) -> Result<c_int> {
+    Ok(if (*view).has_line_info() {
+        1
+    } else {
+        0
+    })
+});
+
+export!(lsm_proguard_mapping_convert_dotted_path(
+    view: *const MappingView, path: *const c_char, lineno: c_int)
+    -> Result<*mut u8>
+{
+    let path = CStr::from_ptr(path).to_str()?;
+    let mut iter = path.splitn(2, ':');
+    let cls_name = iter.next().unwrap_or("");
+    let meth_name = iter.next();
+
+    let s = if let Some(cls) = (*view).find_class(cls_name) {
+        let class_name = cls.class_name();
+        if let Some(meth_name) = meth_name {
+            let methods = cls.get_methods(meth_name, if lineno == 0 {
+                None
+            } else {
+                Some(lineno as u32)
+            });
+            if !methods.is_empty() {
+                format!("{}:{}\x00", class_name, methods[0].name())
+            } else {
+                format!("{}:{}\x00", class_name, meth_name)
+            }
+        } else {
+            format!("{}\x00", class_name)
+        }
+    } else {
+        format!("{}\x00", path)
+    };
+
+    Ok(Box::into_raw(s.into_boxed_str()) as *mut u8)
+});

src/errors.rs

@@ -1,14 +1,16 @@
 use std::io;
 use std::str::Utf8Error;
 
+use proguard;
 use sourcemap;
 
 
 error_chain! {
     foreign_links {
-        io::Error, IoError;
-        Utf8Error, Utf8Error;
-        sourcemap::Error, SourceMapError;
+        Io(io::Error);
+        Utf8(Utf8Error);
+        SourceMap(sourcemap::Error);
+        Proguard(proguard::Error);
     }
 
     errors {

src/lib.rs

@@ -1,6 +1,7 @@
 #![recursion_limit = "1024"]
 
 extern crate sourcemap;
+extern crate proguard;
 extern crate memmap;
 extern crate brotli2;
 extern crate varinteger;
@@ -11,7 +12,7 @@ extern crate error_chain;
 mod errors;
 pub mod memdb;
 
-pub use errors::{Error, ErrorKind, ChainErr, Result};
+pub use errors::{Error, ErrorKind, Result};
 pub use unified::{View, Index, TokenMatch};
 
 // unified interface