Courgette: Add static method QuickDetect() to optimize program detection.

courgette/program_detector.h

Index: courgette/program_detector.h
diff --git a/courgette/program_detector.h b/courgette/program_detector.h
index 06f1da3f84762791181742776de0d466ded7dec8..cce0a171ab4cb69d6e5c781ec1ba2d47138b0438 100644
--- a/courgette/program_detector.h
+++ b/courgette/program_detector.h
@@ -23,11 +23,21 @@ class AssemblyProgram;
 // On failure:
 //   Fills in |type| with UNKNOWN, |detected_length| with 0, and returns
 //   C_INPUT_NOT_RECOGNIZED.
-Status DetectExecutableType(const void* buffer,
+Status DetectExecutableType(const uint8_t* buffer,
                             size_t length,
                             ExecutableType* type,
                             size_t* detected_length);
 
+// Same as above, takes void* instead.
+// TODO(etiennep): Propagate "const uint8_t*" upwards.
+inline Status DetectExecutableType(const void* buffer,
+                                   size_t length,
+                                   ExecutableType* type,
+                                   size_t* detected_length) {
+  return DetectExecutableType(reinterpret_cast<const uint8_t*>(buffer), length,
+                              type, detected_length);
+}
+
 // Attempts to detect the type of executable, and parse it with the appropriate
 // tools.
 // On success:
@@ -35,10 +45,20 @@ Status DetectExecutableType(const void* buffer,
 //   C_OK.
 // On failure:
 //   Returns an error status and assigns |*output| to null.
-Status ParseDetectedExecutable(const void* buffer,
+Status ParseDetectedExecutable(const uint8_t* buffer,
                                size_t length,
                                std::unique_ptr<AssemblyProgram>* output);
 
+// Same as above, takes void* instead.
+// TODO(etiennep): Propagate "const uint8_t*" upwards.
+inline Status ParseDetectedExecutable(
+    const void* buffer,
+    size_t length,
+    std::unique_ptr<AssemblyProgram>* output) {
+  return ParseDetectedExecutable(reinterpret_cast<const uint8_t*>(buffer),
+                                 length, output);
+}
+
 }  // namespace courgette
 
 #endif  // COURGETTE_PROGRAM_DETECTOR_H_