--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/leptonica/src/ptra.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,97 @@
+/*====================================================================*
+ -  Copyright (C) 2001 Leptonica.  All rights reserved.
+ -
+ -  Redistribution and use in source and binary forms, with or without
+ -  modification, are permitted provided that the following conditions
+ -  are met:
+ -  1. Redistributions of source code must retain the above copyright
+ -     notice, this list of conditions and the following disclaimer.
+ -  2. Redistributions in binary form must reproduce the above
+ -     copyright notice, this list of conditions and the following
+ -     disclaimer in the documentation and/or other materials
+ -     provided with the distribution.
+ -
+ -  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ -  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ -  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ -  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ANY
+ -  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ -  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ -  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ -  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ -  OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ -  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ -  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *====================================================================*/
+
+#ifndef  LEPTONICA_PTRA_H
+#define  LEPTONICA_PTRA_H
+
+/*!
+ * \file ptra.h
+ *
+ * <pre>
+ *  Contains the following structs:
+ *      struct L_Ptra
+ *      struct L_Ptraa
+ *
+ *  Contains definitions for:
+ *      L_Ptra compaction flags for removal
+ *      L_Ptra shifting flags for insert
+ *      L_Ptraa accessor flags
+ * </pre>
+ */
+
+    /* Bound on max initial ptra size */
+LEPT_DLL extern const l_uint32  MaxInitPtraSize;
+
+/*------------------------------------------------------------------------*
+ *                     Generic Ptr Array Structs                          *
+ *------------------------------------------------------------------------*/
+
+    /*! Generic pointer array */
+struct L_Ptra
+{
+    l_int32          nalloc;    /*!< size of allocated ptr array         */
+    l_int32          imax;      /*!< greatest valid index                */
+    l_int32          nactual;   /*!< actual number of stored elements    */
+    void           **array;     /*!< ptr array                           */
+};
+typedef struct L_Ptra  L_PTRA;
+
+
+    /*! Array of generic pointer arrays */
+struct L_Ptraa
+{
+    l_int32          nalloc;    /*!< size of allocated ptr array         */
+    struct L_Ptra  **ptra;      /*!< array of ptra                       */
+};
+typedef struct L_Ptraa  L_PTRAA;
+
+
+
+/*------------------------------------------------------------------------*
+ *          Accessor and modifier flags for L_Ptra and L_Ptraa            *
+ *------------------------------------------------------------------------*/
+
+/*! Ptra Removal */
+enum {
+    L_NO_COMPACTION = 1,        /*!< null the pointer only                */
+    L_COMPACTION = 2            /*!< compact the array                    */
+};
+
+/*! Ptra Insertion */
+enum {
+    L_AUTO_DOWNSHIFT = 0,     /*!< choose based on number of holes        */
+    L_MIN_DOWNSHIFT = 1,      /*!< downshifts min # of ptrs below insert  */
+    L_FULL_DOWNSHIFT = 2      /*!< downshifts all ptrs below insert       */
+};
+
+/*! Ptraa Accessor */
+enum {
+    L_HANDLE_ONLY = 0,     /*!< ptr to L_Ptra; caller can inspect only    */
+    L_REMOVE = 1           /*!< caller owns; destroy or save in L_Ptraa   */
+};
+
+
+#endif  /* LEPTONICA_PTRA_H */