Add SPDX-License-Identifier to public include files

Signed-off-by: Stefan Weil <sw@weilnetz.de>

include/tesseract/baseapi.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        baseapi.h
 // Description: Simple API for calling tesseract.
 // Author:      Ray Smith

include/tesseract/capi.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        capi.h
 // Description: C-API TessBaseAPI
 //

include/tesseract/export.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        export.h
 // Description: Place holder
 //

include/tesseract/ltrresultiterator.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        ltrresultiterator.h
 // Description: Iterator for tesseract results in strict left-to-right
 //              order that avoids using tesseract internal data structures.

include/tesseract/ocrclass.h

@@ -1,4 +1,5 @@
 /**********************************************************************
+// SPDX-License-Identifier: Apache-2.0
  * File:        ocrclass.h
  * Description: Class definitions and constants for the OCR API.
  * Author:      Hewlett-Packard Co

include/tesseract/osdetect.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        osdetect.h
 // Description: Orientation and script detection.
 // Author:      Samuel Charron

include/tesseract/pageiterator.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        pageiterator.h
 // Description: Iterator for tesseract page structure that avoids using
 //              tesseract internal data structures.

include/tesseract/publictypes.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        publictypes.h
 // Description: Types used in both the API and internally
 // Author:      Ray Smith

include/tesseract/renderer.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        renderer.h
 // Description: Rendering interface to inject into TessBaseAPI
 //

include/tesseract/resultiterator.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        resultiterator.h
 // Description: Iterator for tesseract results that is capable of
 //              iterating in proper reading order over Bi Directional

include/tesseract/unichar.h

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        unichar.h
 // Description: Unicode character/ligature class.
 // Author:      Ray Smith

include/tesseract/version.h.in

@@ -1,4 +1,5 @@
 ///////////////////////////////////////////////////////////////////////
+// SPDX-License-Identifier: Apache-2.0
 // File:        version.h
 // Description: Version information
 //