--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/leptonica/src/fhmtauto.c	Mon Sep 15 11:44:09 2025 +0200
@@ -0,0 +1,811 @@
+/*====================================================================*
+ -  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.
+ *====================================================================*/
+
+
+/*!
+ * \file fhmtauto.c
+ * <pre>
+ *
+ *    Main function calls:
+ *       l_int32             fhmtautogen()
+ *       l_int32             fhmtautogen1()
+ *       l_int32             fhmtautogen2()
+ *
+ *    Static helpers:
+ *       static SARRAY      *sarrayMakeWplsCode()
+ *       static SARRAY      *sarrayMakeInnerLoopDWACode()
+ *       static char        *makeBarrelshiftString()
+ *
+ *    This automatically generates dwa code for the hit-miss transform.
+ *    Here's a road map for how it all works.
+ *
+ *    (1) You generate an array (a SELA) of hit-miss transform SELs.
+ *        This can be done in several ways, including
+ *           (a) calling the function selaAddHitMiss() for
+ *               pre-compiled SELs
+ *           (b) generating the SELA in code in line
+ *           (c) reading in a SELA from file, using selaRead()
+ *               or various other formats.
+ *
+ *    (2) You call fhmtautogen1() and fhmtautogen2() on this SELA.
+ *        This uses the text files hmttemplate1.txt and
+ *        hmttemplate2.txt for building up the source code.  See the file
+ *        prog/fhmtautogen.c for an example of how this is done.
+ *        The output is written to files named fhmtgen.*.c
+ *        and fhmtgenlow.*.c, where "*" is an integer that you
+ *        input to this function.  That integer labels both
+ *        the output files, as well as all the functions that
+ *        are generated.  That way, using different integers,
+ *        you can invoke fhmtautogen() any number of times
+ *        to get functions that all have different names so that
+ *        they can be linked into one program.
+ *
+ *    (3) You copy the generated source code back to your src
+ *        directory for compilation.  Put their names in the
+ *        Makefile, regnerate the prototypes, and recompile
+ *        the libraries.  Look at the Makefile to see how I've
+ *        included fhmtgen.1.c and fhmtgenlow.1.c.  These files
+ *        provide the single high-level interface for the hmt, and
+ *        the lower-level functions to do the actual work.
+ *
+ *    (4) In an application, you now use this interface.  Again
+ *        for the example files generated, using integer "1":
+ *
+ *           PIX   *pixHMTDwa_1(PIX *pixd, PIX *pixs, const char *selname);
+ *
+ *        where the selname is one of the set that were defined
+ *        as the name field of sels.  This set is listed at the
+ *        beginning of the file fhmtgen.1.c.
+ *
+ *        N.B. Although pixFHMTGen_1() is global, you must NOT
+ *        use it, because it assumes that 32 or 64 border pixels
+ *        have been added to each side, and it will crash without those
+ *        added pixels.
+ *
+ *        As an example, see the file prog/fhmtauto_reg.c, which
+ *        verifies the correctness of the implementation by
+ *        comparing the dwa result with that of full-image
+ *        rasterops.
+ * </pre>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config_auto.h>
+#endif  /* HAVE_CONFIG_H */
+
+#include <string.h>
+#include "allheaders.h"
+
+#define   OUTROOT         "fhmtgen"
+#define   TEMPLATE1       "hmttemplate1.txt"
+#define   TEMPLATE2       "hmttemplate2.txt"
+
+#define   PROTOARGS   "(l_uint32 *, l_int32, l_int32, l_int32, l_uint32 *, l_int32);"
+
+#define L_BUF_SIZE 512
+
+static char * makeBarrelshiftString(l_int32 delx, l_int32 dely, l_int32 type);
+static SARRAY * sarrayMakeInnerLoopDWACode(SEL *sel, l_int32 nhits, l_int32 nmisses);
+static SARRAY * sarrayMakeWplsCode(SEL *sel);
+
+static char wpldecls[][60] = {
+            "l_int32             wpls2;",
+            "l_int32             wpls2, wpls3;",
+            "l_int32             wpls2, wpls3, wpls4;",
+            "l_int32             wpls5;",
+            "l_int32             wpls5, wpls6;",
+            "l_int32             wpls5, wpls6, wpls7;",
+            "l_int32             wpls5, wpls6, wpls7, wpls8;",
+            "l_int32             wpls9;",
+            "l_int32             wpls9, wpls10;",
+            "l_int32             wpls9, wpls10, wpls11;",
+            "l_int32             wpls9, wpls10, wpls11, wpls12;",
+            "l_int32             wpls13;",
+            "l_int32             wpls13, wpls14;",
+            "l_int32             wpls13, wpls14, wpls15;",
+            "l_int32             wpls13, wpls14, wpls15, wpls16;",
+            "l_int32             wpls17;",
+            "l_int32             wpls17, wpls18;",
+            "l_int32             wpls17, wpls18, wpls19;",
+            "l_int32             wpls17, wpls18, wpls19, wpls20;",
+            "l_int32             wpls21;",
+            "l_int32             wpls21, wpls22;",
+            "l_int32             wpls21, wpls22, wpls23;",
+            "l_int32             wpls21, wpls22, wpls23, wpls24;",
+            "l_int32             wpls25;",
+            "l_int32             wpls25, wpls26;",
+            "l_int32             wpls25, wpls26, wpls27;",
+            "l_int32             wpls25, wpls26, wpls27, wpls28;",
+            "l_int32             wpls29;",
+            "l_int32             wpls29, wpls30;",
+            "l_int32             wpls29, wpls30, wpls31;"};
+
+static char wpldefs[][24] = {
+            "    wpls2 = 2 * wpls;",
+            "    wpls3 = 3 * wpls;",
+            "    wpls4 = 4 * wpls;",
+            "    wpls5 = 5 * wpls;",
+            "    wpls6 = 6 * wpls;",
+            "    wpls7 = 7 * wpls;",
+            "    wpls8 = 8 * wpls;",
+            "    wpls9 = 9 * wpls;",
+            "    wpls10 = 10 * wpls;",
+            "    wpls11 = 11 * wpls;",
+            "    wpls12 = 12 * wpls;",
+            "    wpls13 = 13 * wpls;",
+            "    wpls14 = 14 * wpls;",
+            "    wpls15 = 15 * wpls;",
+            "    wpls16 = 16 * wpls;",
+            "    wpls17 = 17 * wpls;",
+            "    wpls18 = 18 * wpls;",
+            "    wpls19 = 19 * wpls;",
+            "    wpls20 = 20 * wpls;",
+            "    wpls21 = 21 * wpls;",
+            "    wpls22 = 22 * wpls;",
+            "    wpls23 = 23 * wpls;",
+            "    wpls24 = 24 * wpls;",
+            "    wpls25 = 25 * wpls;",
+            "    wpls26 = 26 * wpls;",
+            "    wpls27 = 27 * wpls;",
+            "    wpls28 = 28 * wpls;",
+            "    wpls29 = 29 * wpls;",
+            "    wpls30 = 30 * wpls;",
+            "    wpls31 = 31 * wpls;"};
+
+static char wplstrp[][10] = {"+ wpls", "+ wpls2", "+ wpls3", "+ wpls4",
+                             "+ wpls5", "+ wpls6", "+ wpls7", "+ wpls8",
+                             "+ wpls9", "+ wpls10", "+ wpls11", "+ wpls12",
+                             "+ wpls13", "+ wpls14", "+ wpls15", "+ wpls16",
+                             "+ wpls17", "+ wpls18", "+ wpls19", "+ wpls20",
+                             "+ wpls21", "+ wpls22", "+ wpls23", "+ wpls24",
+                             "+ wpls25", "+ wpls26", "+ wpls27", "+ wpls28",
+                             "+ wpls29", "+ wpls30", "+ wpls31"};
+
+static char wplstrm[][10] = {"- wpls", "- wpls2", "- wpls3", "- wpls4",
+                             "- wpls5", "- wpls6", "- wpls7", "- wpls8",
+                             "- wpls9", "- wpls10", "- wpls11", "- wpls12",
+                             "- wpls13", "- wpls14", "- wpls15", "- wpls16",
+                             "- wpls17", "- wpls18", "- wpls19", "- wpls20",
+                             "- wpls21", "- wpls22", "- wpls23", "- wpls24",
+                             "- wpls25", "- wpls26", "- wpls27", "- wpls28",
+                             "- wpls29", "- wpls30", "- wpls31"};
+
+
+/*!
+ * \brief   fhmtautogen()
+ *
+ * \param[in]    sela
+ * \param[in]    fileindex
+ * \param[in]    filename [optional]; can be null
+ * \return  0 if OK; 1 on error
+ *
+ * <pre>
+ * Notes:
+ *      (1) This function generates all the code for implementing
+ *          dwa morphological operations using all the sels in the sela.
+ *      (2) See fhmtautogen1() and fhmtautogen2() for details.
+ * </pre>
+ */
+l_ok
+fhmtautogen(SELA        *sela,
+            l_int32      fileindex,
+            const char  *filename)
+{
+l_int32  ret1, ret2;
+
+    if (!sela)
+        return ERROR_INT("sela not defined", __func__, 1);
+    ret1 = fhmtautogen1(sela, fileindex, filename);
+    ret2 = fhmtautogen2(sela, fileindex, filename);
+    if (ret1 || ret2)
+        return ERROR_INT("code generation problem", __func__, 1);
+    return 0;
+}
+
+
+/*!
+ * \brief   fhmtautogen1()
+ *
+ * \param[in]    sela array
+ * \param[in]    fileindex
+ * \param[in]    filename [optional]; can be null
+ * \return  0 if OK; 1 on error
+ *
+ * <pre>
+ * Notes:
+ *      (1) This function uses hmttemplate1.txt to create a
+ *          top-level file that contains two functions that carry
+ *          out the hit-miss transform for any of the sels in
+ *          the input sela.
+ *      (2) The fileindex parameter is inserted into the output
+ *          filename, as described below.
+ *      (3) If filename == NULL, the output file is fhmtgen.[n].c,
+ *          where [n] is equal to the 'fileindex' parameter.
+ *      (4) If filename != NULL, the output file is [filename].[n].c.
+ *      (5) Each sel must have at least one hit.  A sel with only misses
+ *          generates code that will abort the operation if it is called.
+ * </pre>
+ */
+l_ok
+fhmtautogen1(SELA        *sela,
+             l_int32      fileindex,
+             const char  *filename)
+{
+char    *filestr;
+char    *str_proto1, *str_proto2, *str_proto3;
+char    *str_doc1, *str_doc2, *str_doc3, *str_doc4;
+char    *str_def1, *str_def2, *str_proc1, *str_proc2;
+char    *str_dwa1, *str_low_dt, *str_low_ds;
+char     bigbuf[L_BUF_SIZE];
+l_int32  i, nsels, nbytes, actstart, end, newstart;
+size_t   size;
+SARRAY  *sa1, *sa2, *sa3;
+
+    if (!sela)
+        return ERROR_INT("sela not defined", __func__, 1);
+    if (fileindex < 0)
+        fileindex = 0;
+    if ((nsels = selaGetCount(sela)) == 0)
+        return ERROR_INT("no sels in sela", __func__, 1);
+
+        /* Make array of textlines from from hmttemplate1.txt */
+    if ((filestr = (char *)l_binaryRead(TEMPLATE1, &size)) == NULL)
+        return ERROR_INT("filestr not made", __func__, 1);
+    sa2 = sarrayCreateLinesFromString(filestr, 1);
+    LEPT_FREE(filestr);
+    if (!sa2)
+        return ERROR_INT("sa2 not made", __func__, 1);
+
+        /* Make array of sel names */
+    sa1 = selaGetSelnames(sela);
+
+        /* Make strings containing function call names */
+    sprintf(bigbuf, "PIX *pixHMTDwa_%d(PIX *pixd, PIX *pixs, "
+                    "const char *selname);", fileindex);
+    str_proto1 = stringNew(bigbuf);
+    sprintf(bigbuf, "PIX *pixFHMTGen_%d(PIX *pixd, PIX *pixs, "
+                    "const char *selname);", fileindex);
+    str_proto2 = stringNew(bigbuf);
+    sprintf(bigbuf, "l_int32 fhmtgen_low_%d(l_uint32 *datad, l_int32 w,\n"
+            "                      l_int32 h, l_int32 wpld,\n"
+            "                      l_uint32 *datas, l_int32 wpls,\n"
+            "                      l_int32 index);", fileindex);
+    str_proto3 = stringNew(bigbuf);
+    sprintf(bigbuf, " *             PIX     *pixHMTDwa_%d()", fileindex);
+    str_doc1 = stringNew(bigbuf);
+    sprintf(bigbuf, " *             PIX     *pixFHMTGen_%d()", fileindex);
+    str_doc2 = stringNew(bigbuf);
+    sprintf(bigbuf, " * \\brief  pixHMTDwa_%d()", fileindex);
+    str_doc3 = stringNew(bigbuf);
+    sprintf(bigbuf, " * \\brief  pixFHMTGen_%d()", fileindex);
+    str_doc4 = stringNew(bigbuf);
+    sprintf(bigbuf, "pixHMTDwa_%d(PIX         *pixd,", fileindex);
+    str_def1 = stringNew(bigbuf);
+    sprintf(bigbuf, "pixFHMTGen_%d(PIX         *pixd,", fileindex);
+    str_def2 = stringNew(bigbuf);
+    sprintf(bigbuf, "    PROCNAME(\"pixHMTDwa_%d\");", fileindex);
+    str_proc1 = stringNew(bigbuf);
+    sprintf(bigbuf, "    PROCNAME(\"pixFHMTGen_%d\");", fileindex);
+    str_proc2 = stringNew(bigbuf);
+    sprintf(bigbuf, "    pixt2 = pixFHMTGen_%d(NULL, pixt1, selname);",
+            fileindex);
+    str_dwa1 = stringNew(bigbuf);
+    sprintf(bigbuf,
+            "        fhmtgen_low_%d(datad, w, h, wpld, datat, wpls, index);",
+            fileindex);
+    str_low_dt = stringNew(bigbuf);
+    sprintf(bigbuf,
+            "        fhmtgen_low_%d(datad, w, h, wpld, datas, wpls, index);",
+            fileindex);
+    str_low_ds = stringNew(bigbuf);
+
+        /* Make the output sa */
+    sa3 = sarrayCreate(0);
+
+        /* Copyright notice and info header */
+    sarrayParseRange(sa2, 0, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+
+        /* Insert function names as documentation */
+    sarrayAddString(sa3, str_doc1, L_INSERT);
+    sarrayAddString(sa3, str_doc2, L_INSERT);
+
+        /* Add '#include's */
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+
+        /* Insert function prototypes */
+    sarrayAddString(sa3, str_proto1, L_INSERT);
+    sarrayAddString(sa3, str_proto2, L_INSERT);
+    sarrayAddString(sa3, str_proto3, L_INSERT);
+
+        /* Add static globals */
+    sprintf(bigbuf, "\nstatic l_int32   NUM_SELS_GENERATED = %d;", nsels);
+    sarrayAddString(sa3, bigbuf, L_COPY);
+    sprintf(bigbuf, "static char  SEL_NAMES[][80] = {");
+    sarrayAddString(sa3, bigbuf, L_COPY);
+    for (i = 0; i < nsels - 1; i++) {
+        sprintf(bigbuf, "                             \"%s\",",
+                sarrayGetString(sa1, i, L_NOCOPY));
+        sarrayAddString(sa3, bigbuf, L_COPY);
+    }
+    sprintf(bigbuf, "                             \"%s\"};",
+            sarrayGetString(sa1, i, L_NOCOPY));
+    sarrayAddString(sa3, bigbuf, L_COPY);
+
+        /* Start pixHMTDwa_*() function description */
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+    sarrayAddString(sa3, str_doc3, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+
+        /* Finish pixHMTDwa_*() function definition */
+    sarrayAddString(sa3, str_def1, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+    sarrayAddString(sa3, str_proc1, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+    sarrayAddString(sa3, str_dwa1, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+
+        /* Start pixFHMTGen_*() function description */
+    sarrayAddString(sa3, str_doc4, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+
+        /* Finish pixFHMTGen_*() function description */
+    sarrayAddString(sa3, str_def2, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+    sarrayAddString(sa3, str_proc2, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+    sarrayAddString(sa3, str_low_dt, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+    sarrayAddString(sa3, str_low_ds, L_INSERT);
+    sarrayParseRange(sa2, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa3, sa2, actstart, end);
+
+    filestr = sarrayToString(sa3, 1);
+    nbytes = strlen(filestr);
+    if (filename)
+        snprintf(bigbuf, L_BUF_SIZE, "%s.%d.c", filename, fileindex);
+    else
+        sprintf(bigbuf, "%s.%d.c", OUTROOT, fileindex);
+    l_binaryWrite(bigbuf, "w", filestr, nbytes);
+    sarrayDestroy(&sa1);
+    sarrayDestroy(&sa2);
+    sarrayDestroy(&sa3);
+    LEPT_FREE(filestr);
+    return 0;
+}
+
+
+/*!
+ * \brief   fhmtautogen2()
+ *
+ * \param[in]    sela array
+ * \param[in]    fileindex
+ * \param[in]    filename [optional]; can be null
+ * \return  0 if OK; 1 on error
+ *
+ * <pre>
+ * Notes:
+ *      (1) This function uses hmttemplate2.txt to create a
+ *          low-level file that contains the low-level functions for
+ *          implementing the hit-miss transform for every sel
+ *          in the input sela.
+ *      (2) The fileindex parameter is inserted into the output
+ *          filename, as described below.
+ *      (3) If filename == NULL, the output file is fhmtgenlow.[n].c,
+ *          where [n] is equal to the %fileindex parameter.
+ *      (4) If filename != NULL, the output file is [filename]low.[n].c.
+ * </pre>
+ */
+l_ok
+fhmtautogen2(SELA        *sela,
+             l_int32      fileindex,
+             const char  *filename)
+{
+char    *filestr, *fname, *linestr;
+char    *str_doc1, *str_doc2, *str_doc3, *str_def1;
+char     bigbuf[L_BUF_SIZE];
+char     breakstring[] = "        break;";
+char     staticstring[] = "static void";
+l_int32  i, k, l, nsels, nbytes, nhits, nmisses;
+l_int32  actstart, end, newstart;
+l_int32  argstart, argend, loopstart, loopend, finalstart, finalend;
+size_t   size;
+SARRAY  *sa1, *sa2, *sa3, *sa4, *sa5, *sa6;
+SEL     *sel;
+
+    if (!sela)
+        return ERROR_INT("sela not defined", __func__, 1);
+    if (fileindex < 0)
+        fileindex = 0;
+    if ((nsels = selaGetCount(sela)) == 0)
+        return ERROR_INT("no sels in sela", __func__, 1);
+
+        /* Make the array of textlines from hmttemplate2.txt */
+    if ((filestr = (char *)l_binaryRead(TEMPLATE2, &size)) == NULL)
+        return ERROR_INT("filestr not made", __func__, 1);
+    sa1 = sarrayCreateLinesFromString(filestr, 1);
+    LEPT_FREE(filestr);
+    if (!sa1)
+        return ERROR_INT("sa1 not made", __func__, 1);
+
+        /* Make the array of static function names */
+    if ((sa2 = sarrayCreate(nsels)) == NULL) {
+        sarrayDestroy(&sa1);
+        return ERROR_INT("sa2 not made", __func__, 1);
+    }
+    for (i = 0; i < nsels; i++) {
+        sprintf(bigbuf, "fhmt_%d_%d", fileindex, i);
+        sarrayAddString(sa2, bigbuf, L_COPY);
+    }
+
+        /* Make the static prototype strings */
+    sa3 = sarrayCreate(2 * nsels);  /* should be ok */
+    for (i = 0; i < nsels; i++) {
+        fname = sarrayGetString(sa2, i, L_NOCOPY);
+        sprintf(bigbuf, "static void  %s%s", fname, PROTOARGS);
+        sarrayAddString(sa3, bigbuf, L_COPY);
+    }
+
+        /* Make strings containing function names */
+    sprintf(bigbuf, " *             l_int32    fhmtgen_low_%d()",
+            fileindex);
+    str_doc1 = stringNew(bigbuf);
+    sprintf(bigbuf, " *             void       fhmt_%d_*()", fileindex);
+    str_doc2 = stringNew(bigbuf);
+
+        /* Output to this sa */
+    sa4 = sarrayCreate(0);
+
+        /* Copyright notice and info header */
+    sarrayParseRange(sa1, 0, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa4, sa1, actstart, end);
+
+        /* Insert function names as documentation */
+    sarrayAddString(sa4, str_doc1, L_INSERT);
+    sarrayParseRange(sa1, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa4, sa1, actstart, end);
+    sarrayAddString(sa4, str_doc2, L_INSERT);
+    sarrayParseRange(sa1, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa4, sa1, actstart, end);
+
+        /* Insert static protos */
+    for (i = 0; i < nsels; i++) {
+        if ((linestr = sarrayGetString(sa3, i, L_COPY)) == NULL) {
+            sarrayDestroy(&sa1);
+            sarrayDestroy(&sa2);
+            sarrayDestroy(&sa3);
+            sarrayDestroy(&sa4);
+            return ERROR_INT("linestr not retrieved", __func__, 1);
+        }
+        sarrayAddString(sa4, linestr, L_INSERT);
+    }
+
+        /* Make more strings containing function names */
+    sprintf(bigbuf, " *  fhmtgen_low_%d()", fileindex);
+    str_doc3 = stringNew(bigbuf);
+    sprintf(bigbuf, "fhmtgen_low_%d(l_uint32  *datad,", fileindex);
+    str_def1 = stringNew(bigbuf);
+
+        /* Insert function header */
+    sarrayParseRange(sa1, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa4, sa1, actstart, end);
+    sarrayAddString(sa4, str_doc3, L_INSERT);
+    sarrayParseRange(sa1, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa4, sa1, actstart, end);
+    sarrayAddString(sa4, str_def1, L_INSERT);
+    sarrayParseRange(sa1, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa4, sa1, actstart, end);
+
+        /* Generate and insert the dispatcher code */
+    for (i = 0; i < nsels; i++) {
+        sprintf(bigbuf, "    case %d:", i);
+        sarrayAddString(sa4, bigbuf, L_COPY);
+        sprintf(bigbuf, "        %s(datad, w, h, wpld, datas, wpls);",
+               sarrayGetString(sa2, i, L_NOCOPY));
+        sarrayAddString(sa4, bigbuf, L_COPY);
+        sarrayAddString(sa4, breakstring, L_COPY);
+    }
+
+        /* Finish the dispatcher and introduce the low-level code */
+    sarrayParseRange(sa1, newstart, &actstart, &end, &newstart, "--", 0);
+    sarrayAppendRange(sa4, sa1, actstart, end);
+
+        /* Get the range for the args common to all functions */
+    sarrayParseRange(sa1, newstart, &argstart, &argend, &newstart, "--", 0);
+
+        /* Get the range for the loop code common to all functions */
+    sarrayParseRange(sa1, newstart, &loopstart, &loopend, &newstart, "--", 0);
+
+        /* Get the range for the ending code common to all functions */
+    sarrayParseRange(sa1, newstart, &finalstart, &finalend, &newstart, "--", 0);
+
+        /* Do all the static functions */
+    for (i = 0; i < nsels; i++) {
+            /* Generate the function header and add the common args */
+        sarrayAddString(sa4, staticstring, L_COPY);
+        fname = sarrayGetString(sa2, i, L_NOCOPY);
+        sprintf(bigbuf, "%s(l_uint32  *datad,", fname);
+        sarrayAddString(sa4, bigbuf, L_COPY);
+        sarrayAppendRange(sa4, sa1, argstart, argend);
+
+            /* Declare and define wplsN args, as necessary */
+        if ((sel = selaGetSel(sela, i)) == NULL) {
+            sarrayDestroy(&sa1);
+            sarrayDestroy(&sa2);
+            sarrayDestroy(&sa3);
+            sarrayDestroy(&sa4);
+            return ERROR_INT("sel not returned", __func__, 1);
+        }
+        sa5 = sarrayMakeWplsCode(sel);
+        sarrayJoin(sa4, sa5);
+        sarrayDestroy(&sa5);
+
+            /* Make sure sel has at least one hit */
+        nhits = 0;
+        nmisses = 0;
+        for (k = 0; k < sel->sy; k++) {
+            for (l = 0; l < sel->sx; l++) {
+                if (sel->data[k][l] == 1)
+                    nhits++;
+                else if (sel->data[k][l] == 2)
+                    nmisses++;
+            }
+        }
+        if (nhits == 0) {
+            linestr = stringNew("    "
+                "lept_stderr(\"Error in HMT: no hits in sel!\\n\");\n}\n\n");
+            sarrayAddString(sa4, linestr, L_INSERT);
+            continue;
+        }
+
+            /* Add the function loop code */
+        sarrayAppendRange(sa4, sa1, loopstart, loopend);
+
+            /* Insert barrel-op code for *dptr */
+        if ((sa6 = sarrayMakeInnerLoopDWACode(sel, nhits, nmisses)) == NULL) {
+            sarrayDestroy(&sa1);
+            sarrayDestroy(&sa2);
+            sarrayDestroy(&sa3);
+            sarrayDestroy(&sa4);
+            return ERROR_INT("sa6 not made", __func__, 1);
+        }
+        sarrayJoin(sa4, sa6);
+        sarrayDestroy(&sa6);
+
+            /* Finish the function code */
+        sarrayAppendRange(sa4, sa1, finalstart, finalend);
+    }
+
+        /* Output to file */
+    filestr = sarrayToString(sa4, 1);
+    nbytes = strlen(filestr);
+    if (filename)
+        snprintf(bigbuf, L_BUF_SIZE, "%slow.%d.c", filename, fileindex);
+    else
+        sprintf(bigbuf, "%slow.%d.c", OUTROOT, fileindex);
+    l_binaryWrite(bigbuf, "w", filestr, nbytes);
+    sarrayDestroy(&sa1);
+    sarrayDestroy(&sa2);
+    sarrayDestroy(&sa3);
+    sarrayDestroy(&sa4);
+    LEPT_FREE(filestr);
+    return 0;
+}
+
+
+
+/*--------------------------------------------------------------------------*
+ *                            Helper code for sel                           *
+ *--------------------------------------------------------------------------*/
+/*!
+ * \brief   sarrayMakeWplsCode()
+ */
+static SARRAY *
+sarrayMakeWplsCode(SEL  *sel)
+{
+char     emptystring[] = "";
+l_int32  i, j, ymax, dely;
+SARRAY  *sa;
+
+    if (!sel)
+        return (SARRAY *)ERROR_PTR("sel not defined", __func__, NULL);
+
+    ymax = 0;
+    for (i = 0; i < sel->sy; i++) {
+        for (j = 0; j < sel->sx; j++) {
+            if (sel->data[i][j] == 1 || sel->data[i][j] == 2) {
+                dely = L_ABS(i - sel->cy);
+                ymax = L_MAX(ymax, dely);
+            }
+        }
+    }
+    if (ymax > 31) {
+        L_WARNING("ymax > 31; truncating to 31\n", __func__);
+        ymax = 31;
+    }
+
+    sa = sarrayCreate(0);
+
+        /* Declarations */
+    if (ymax > 4)
+        sarrayAddString(sa, wpldecls[2], L_COPY);
+    if (ymax > 8)
+        sarrayAddString(sa, wpldecls[6], L_COPY);
+    if (ymax > 12)
+        sarrayAddString(sa, wpldecls[10], L_COPY);
+    if (ymax > 16)
+        sarrayAddString(sa, wpldecls[14], L_COPY);
+    if (ymax > 20)
+        sarrayAddString(sa, wpldecls[18], L_COPY);
+    if (ymax > 24)
+        sarrayAddString(sa, wpldecls[22], L_COPY);
+    if (ymax > 28)
+        sarrayAddString(sa, wpldecls[26], L_COPY);
+    if (ymax > 1)
+        sarrayAddString(sa, wpldecls[ymax - 2], L_COPY);
+
+    sarrayAddString(sa, emptystring, L_COPY);
+
+        /* Definitions */
+    for (i = 2; i <= ymax; i++)
+        sarrayAddString(sa, wpldefs[i - 2], L_COPY);
+
+    return sa;
+}
+
+
+/*!
+ * \brief   sarrayMakeInnerLoopDWACode()
+ */
+static SARRAY *
+sarrayMakeInnerLoopDWACode(SEL     *sel,
+                           l_int32  nhits,
+                           l_int32  nmisses)
+{
+char    *string;
+char     land[] = "&";
+char     bigbuf[L_BUF_SIZE];
+l_int32  i, j, ntot, nfound, type, delx, dely;
+SARRAY  *sa;
+
+    if (!sel)
+        return (SARRAY *)ERROR_PTR("sel not defined", __func__, NULL);
+
+    sa = sarrayCreate(0);
+    ntot = nhits + nmisses;
+    nfound = 0;
+    for (i = 0; i < sel->sy; i++) {
+        for (j = 0; j < sel->sx; j++) {
+            type = sel->data[i][j];
+            if (type == SEL_HIT || type == SEL_MISS) {
+                nfound++;
+                dely = i - sel->cy;
+                delx = j - sel->cx;
+                if ((string = makeBarrelshiftString(delx, dely, type))
+                        == NULL) {
+                    L_WARNING("barrel shift string not made\n", __func__);
+                    continue;
+                }
+                if (ntot == 1)  /* just one item */
+                    sprintf(bigbuf, "            *dptr = %s;", string);
+                else if (nfound == 1)
+                    sprintf(bigbuf, "            *dptr = %s %s", string, land);
+                else if (nfound < ntot)
+                    sprintf(bigbuf, "                    %s %s", string, land);
+                else  /* nfound == ntot */
+                    sprintf(bigbuf, "                    %s;", string);
+                sarrayAddString(sa, bigbuf, L_COPY);
+                LEPT_FREE(string);
+            }
+        }
+    }
+
+    return sa;
+}
+
+
+/*!
+ * \brief   makeBarrelshiftString()
+ */
+static char *
+makeBarrelshiftString(l_int32  delx,    /* j - cx */
+                      l_int32  dely,    /* i - cy */
+                      l_int32  type)    /* SEL_HIT or SEL_MISS */
+{
+l_int32  absx, absy;
+char     bigbuf[L_BUF_SIZE];
+
+    if (delx < -31 || delx > 31)
+        return (char *)ERROR_PTR("delx out of bounds", __func__, NULL);
+    if (dely < -31 || dely > 31)
+        return (char *)ERROR_PTR("dely out of bounds", __func__, NULL);
+    absx = L_ABS(delx);
+    absy = L_ABS(dely);
+
+    if (type == SEL_HIT) {
+        if ((delx == 0) && (dely == 0))
+            sprintf(bigbuf, "(*sptr)");
+        else if ((delx == 0) && (dely < 0))
+            sprintf(bigbuf, "(*(sptr %s))", wplstrm[absy - 1]);
+        else if ((delx == 0) && (dely > 0))
+            sprintf(bigbuf, "(*(sptr %s))", wplstrp[absy - 1]);
+        else if ((delx < 0) && (dely == 0))
+            sprintf(bigbuf, "((*(sptr) >> %d) | (*(sptr - 1) << %d))",
+                  absx, 32 - absx);
+        else if ((delx > 0) && (dely == 0))
+            sprintf(bigbuf, "((*(sptr) << %d) | (*(sptr + 1) >> %d))",
+                  absx, 32 - absx);
+        else if ((delx < 0) && (dely < 0))
+            sprintf(bigbuf, "((*(sptr %s) >> %d) | (*(sptr %s - 1) << %d))",
+                  wplstrm[absy - 1], absx, wplstrm[absy - 1], 32 - absx);
+        else if ((delx > 0) && (dely < 0))
+            sprintf(bigbuf, "((*(sptr %s) << %d) | (*(sptr %s + 1) >> %d))",
+                  wplstrm[absy - 1], absx, wplstrm[absy - 1], 32 - absx);
+        else if ((delx < 0) && (dely > 0))
+            sprintf(bigbuf, "((*(sptr %s) >> %d) | (*(sptr %s - 1) << %d))",
+                  wplstrp[absy - 1], absx, wplstrp[absy - 1], 32 - absx);
+        else  /*  ((delx > 0) && (dely > 0))  */
+            sprintf(bigbuf, "((*(sptr %s) << %d) | (*(sptr %s + 1) >> %d))",
+                  wplstrp[absy - 1], absx, wplstrp[absy - 1], 32 - absx);
+    } else {  /* type == SEL_MISS */
+        if ((delx == 0) && (dely == 0))
+            sprintf(bigbuf, "(~*sptr)");
+        else if ((delx == 0) && (dely < 0))
+            sprintf(bigbuf, "(~*(sptr %s))", wplstrm[absy - 1]);
+        else if ((delx == 0) && (dely > 0))
+            sprintf(bigbuf, "(~*(sptr %s))", wplstrp[absy - 1]);
+        else if ((delx < 0) && (dely == 0))
+            sprintf(bigbuf, "((~*(sptr) >> %d) | (~*(sptr - 1) << %d))",
+                  absx, 32 - absx);
+        else if ((delx > 0) && (dely == 0))
+            sprintf(bigbuf, "((~*(sptr) << %d) | (~*(sptr + 1) >> %d))",
+                  absx, 32 - absx);
+        else if ((delx < 0) && (dely < 0))
+            sprintf(bigbuf, "((~*(sptr %s) >> %d) | (~*(sptr %s - 1) << %d))",
+                  wplstrm[absy - 1], absx, wplstrm[absy - 1], 32 - absx);
+        else if ((delx > 0) && (dely < 0))
+            sprintf(bigbuf, "((~*(sptr %s) << %d) | (~*(sptr %s + 1) >> %d))",
+                  wplstrm[absy - 1], absx, wplstrm[absy - 1], 32 - absx);
+        else if ((delx < 0) && (dely > 0))
+            sprintf(bigbuf, "((~*(sptr %s) >> %d) | (~*(sptr %s - 1) << %d))",
+                  wplstrp[absy - 1], absx, wplstrp[absy - 1], 32 - absx);
+        else  /*  ((delx > 0) && (dely > 0))  */
+            sprintf(bigbuf, "((~*(sptr %s) << %d) | (~*(sptr %s + 1) >> %d))",
+                  wplstrp[absy - 1], absx, wplstrp[absy - 1], 32 - absx);
+    }
+
+    return stringNew(bigbuf);
+}