--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zint/backend/auspost.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,285 @@
+/* auspost.c - Handles Australia Post 4-State Barcode */
+/*
+    libzint - the open source barcode library
+    Copyright (C) 2008-2024 Robin Stuart <rstuart114@gmail.com>
+
+    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.
+    3. Neither the name of the project nor the names of its contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission.
+
+    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 THE COPYRIGHT OWNER OR 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.
+ */
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+static const char GDSET[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz #";
+#define GDSET_F (IS_NUM_F | IS_UPR_F | IS_LWR_F | IS_SPC_F | IS_HSH_F)
+
+static const char AusNTable[10][2] = {
+    {'0','0'}, {'0','1'}, {'0','2'}, {'1','0'}, {'1','1'}, {'1','2'}, {'2','0'}, {'2','1'}, {'2','2'}, {'3','0'}
+};
+
+static const char AusCTable[64][3] = {
+    {'2','2','2'}, {'3','0','0'}, {'3','0','1'}, {'3','0','2'}, {'3','1','0'}, {'3','1','1'},
+    {'3','1','2'}, {'3','2','0'}, {'3','2','1'}, {'3','2','2'}, {'0','0','0'}, {'0','0','1'},
+    {'0','0','2'}, {'0','1','0'}, {'0','1','1'}, {'0','1','2'}, {'0','2','0'}, {'0','2','1'},
+    {'0','2','2'}, {'1','0','0'}, {'1','0','1'}, {'1','0','2'}, {'1','1','0'}, {'1','1','1'},
+    {'1','1','2'}, {'1','2','0'}, {'1','2','1'}, {'1','2','2'}, {'2','0','0'}, {'2','0','1'},
+    {'2','0','2'}, {'2','1','0'}, {'2','1','1'}, {'2','1','2'}, {'2','2','0'}, {'2','2','1'},
+    {'0','2','3'}, {'0','3','0'}, {'0','3','1'}, {'0','3','2'}, {'0','3','3'}, {'1','0','3'},
+    {'1','1','3'}, {'1','2','3'}, {'1','3','0'}, {'1','3','1'}, {'1','3','2'}, {'1','3','3'},
+    {'2','0','3'}, {'2','1','3'}, {'2','2','3'}, {'2','3','0'}, {'2','3','1'}, {'2','3','2'},
+    {'2','3','3'}, {'3','0','3'}, {'3','1','3'}, {'3','2','3'}, {'3','3','0'}, {'3','3','1'},
+    {'3','3','2'}, {'3','3','3'}, {'0','0','3'}, {'0','1','3'}
+};
+
+static const char AusBarTable[64][3] = {
+    {'0','0','0'}, {'0','0','1'}, {'0','0','2'}, {'0','0','3'}, {'0','1','0'}, {'0','1','1'},
+    {'0','1','2'}, {'0','1','3'}, {'0','2','0'}, {'0','2','1'}, {'0','2','2'}, {'0','2','3'},
+    {'0','3','0'}, {'0','3','1'}, {'0','3','2'}, {'0','3','3'}, {'1','0','0'}, {'1','0','1'},
+    {'1','0','2'}, {'1','0','3'}, {'1','1','0'}, {'1','1','1'}, {'1','1','2'}, {'1','1','3'},
+    {'1','2','0'}, {'1','2','1'}, {'1','2','2'}, {'1','2','3'}, {'1','3','0'}, {'1','3','1'},
+    {'1','3','2'}, {'1','3','3'}, {'2','0','0'}, {'2','0','1'}, {'2','0','2'}, {'2','0','3'},
+    {'2','1','0'}, {'2','1','1'}, {'2','1','2'}, {'2','1','3'}, {'2','2','0'}, {'2','2','1'},
+    {'2','2','2'}, {'2','2','3'}, {'2','3','0'}, {'2','3','1'}, {'2','3','2'}, {'2','3','3'},
+    {'3','0','0'}, {'3','0','1'}, {'3','0','2'}, {'3','0','3'}, {'3','1','0'}, {'3','1','1'},
+    {'3','1','2'}, {'3','1','3'}, {'3','2','0'}, {'3','2','1'}, {'3','2','2'}, {'3','2','3'},
+    {'3','3','0'}, {'3','3','1'}, {'3','3','2'}, {'3','3','3'}
+};
+
+#include <stdio.h>
+#include "common.h"
+#include "reedsol.h"
+
+static char aus_convert_pattern(char data, int shift) {
+    return (data - '0') << shift;
+}
+
+/* Adds Reed-Solomon error correction to auspost */
+static char *aus_rs_error(char data_pattern[], char *d) {
+    int reader, length, triple_writer = 0;
+    unsigned char triple[31];
+    unsigned char result[5];
+    rs_t rs;
+
+    for (reader = 2, length = d - data_pattern; reader < length; reader += 3, triple_writer++) {
+        triple[triple_writer] = aus_convert_pattern(data_pattern[reader], 4)
+                + aus_convert_pattern(data_pattern[reader + 1], 2)
+                + aus_convert_pattern(data_pattern[reader + 2], 0);
+    }
+
+    rs_init_gf(&rs, 0x43);
+    rs_init_code(&rs, 4, 1);
+    rs_encode(&rs, triple_writer, triple, result);
+
+    for (reader = 0; reader < 4; reader++, d += 3) {
+        memcpy(d, AusBarTable[result[reader]], 3);
+    }
+
+    return d;
+}
+
+INTERNAL int daft_set_height(struct zint_symbol *symbol, const float min_height, const float max_height);
+
+/* Handles Australia Posts's 4 State Codes */
+INTERNAL int auspost(struct zint_symbol *symbol, unsigned char source[], int length) {
+    /* Customer Standard Barcode, Barcode 2 or Barcode 3 system determined automatically
+       (i.e. the FCC doesn't need to be specified by the user) dependent
+       on the length of the input string */
+
+    /* The contents of data_pattern conform to the following standard:
+       0 = Tracker, Ascender and Descender
+       1 = Tracker and Ascender
+       2 = Tracker and Descender
+       3 = Tracker only */
+    int i;
+    int error_number;
+    int writer;
+    int loopey, reader;
+    int h;
+
+    char data_pattern[200];
+    char *d = data_pattern;
+    char fcc[3] = {0}, dpid[10];
+    char localstr[30];
+
+    /* Do all of the length checking first to avoid stack smashing */
+    if (symbol->symbology == BARCODE_AUSPOST) {
+        if (length != 8 && length != 13 && length != 16 && length != 18 && length != 23) {
+            return errtxtf(ZINT_ERROR_TOO_LONG, symbol, 401, "Input length %d wrong (8, 13, 16, 18 or 23 only)",
+                            length);
+        }
+    } else if (length > 8) {
+        return errtxtf(ZINT_ERROR_TOO_LONG, symbol, 403, "Input length %d too long (maximum 8)", length);
+    }
+
+    /* Check input immediately to catch nuls */
+    if ((i = not_sane(GDSET_F, source, length))) {
+        return errtxtf(ZINT_ERROR_INVALID_DATA, symbol, 404,
+                        "Invalid character at position %d in input (alphanumerics, space and \"#\" only)", i);
+    }
+
+    localstr[0] = '\0';
+
+    if (symbol->symbology == BARCODE_AUSPOST) {
+        /* Format control code (FCC) */
+        switch (length) {
+            case 8:
+                strcpy(fcc, "11");
+                break;
+            case 13:
+                strcpy(fcc, "59");
+                break;
+            case 16:
+                strcpy(fcc, "59");
+                if ((i = not_sane(NEON_F, source, length))) {
+                    return errtxtf(ZINT_ERROR_INVALID_DATA, symbol, 402,
+                                    "Invalid character at position %d in input (digits only for FCC 59 length 16)",
+                                    i);
+                }
+                break;
+            case 18:
+                strcpy(fcc, "62");
+                break;
+            case 23:
+                strcpy(fcc, "62");
+                if ((i = not_sane(NEON_F, source, length))) {
+                    return errtxtf(ZINT_ERROR_INVALID_DATA, symbol, 406,
+                                    "Invalid character at position %d in input (digits only for FCC 62 length 23)",
+                                    i);
+                }
+                break;
+        }
+    } else {
+        int zeroes;
+        switch (symbol->symbology) {
+            case BARCODE_AUSREPLY: strcpy(fcc, "45");
+                break;
+            case BARCODE_AUSROUTE: strcpy(fcc, "87");
+                break;
+            case BARCODE_AUSREDIRECT: strcpy(fcc, "92");
+                break;
+        }
+
+        /* Add leading zeros as required */
+        zeroes = 8 - length;
+        memset(localstr, '0', zeroes);
+        localstr[zeroes] = '\0';
+    }
+
+    if (symbol->debug & ZINT_DEBUG_PRINT) {
+        printf("AUSPOST FCC: %s\n", fcc);
+    }
+
+    ustrncat(localstr, source, length);
+    h = (int) strlen(localstr);
+    /* Verify that the first 8 characters are numbers */
+    memcpy(dpid, localstr, 8);
+    dpid[8] = '\0';
+    if ((i = not_sane(NEON_F, (unsigned char *) dpid, 8))) {
+        return errtxtf(ZINT_ERROR_INVALID_DATA, symbol, 405,
+                        "Invalid character at position %d in DPID (first 8 characters) (digits only)", i);
+    }
+
+    /* Start character */
+    memcpy(d, "13", 2);
+    d += 2;
+
+    /* Encode the FCC */
+    for (reader = 0; reader < 2; reader++, d += 2) {
+        memcpy(d, AusNTable[fcc[reader] - '0'], 2);
+    }
+
+    /* Delivery Point Identifier (DPID) */
+    for (reader = 0; reader < 8; reader++, d += 2) {
+        memcpy(d, AusNTable[dpid[reader] - '0'], 2);
+    }
+
+    /* Customer Information */
+    if (h > 8) {
+        if ((h == 13) || (h == 18)) {
+            for (reader = 8; reader < h; reader++, d += 3) {
+                memcpy(d, AusCTable[posn(GDSET, localstr[reader])], 3);
+            }
+        } else if ((h == 16) || (h == 23)) {
+            for (reader = 8; reader < h; reader++, d += 2) {
+                memcpy(d, AusNTable[localstr[reader] - '0'], 2);
+            }
+        }
+    }
+
+    /* Filler bar */
+    h = d - data_pattern;
+    switch (h) {
+        case 22:
+        case 37:
+        case 52:
+            *d++ = '3';
+            break;
+        default:
+            break;
+    }
+
+    /* Reed Solomon error correction */
+    d = aus_rs_error(data_pattern, d);
+
+    /* Stop character */
+    memcpy(d, "13", 2);
+    d += 2;
+
+    /* Turn the symbol into a bar pattern ready for plotting */
+    writer = 0;
+    h = d - data_pattern;
+    for (loopey = 0; loopey < h; loopey++) {
+        if ((data_pattern[loopey] == '1') || (data_pattern[loopey] == '0')) {
+            set_module(symbol, 0, writer);
+        }
+        set_module(symbol, 1, writer);
+        if ((data_pattern[loopey] == '2') || (data_pattern[loopey] == '0')) {
+            set_module(symbol, 2, writer);
+        }
+        writer += 2;
+    }
+
+    if (symbol->output_options & COMPLIANT_HEIGHT) {
+        /* Australia Post Customer Barcoding Technical Specifications (Revised Aug 2012) Dimensions, placement and
+           printing p.12
+           (https://auspost.com.au/content/dam/auspost_corp/media/documents/
+            customer-barcode-technical-specifications-aug2012.pdf)
+           X 0.5mm (average of 0.4mm - 0.6mm), min height 4.2mm / 0.6mm (X max) = 7, max 5.6mm / 0.4mm (X min) = 14
+           Tracker 1.3mm (average of 1mm - 1.6mm)
+           Ascender/Descender 3.15mm (average of 2.6mm - 3.7mm) less T = 1.85mm
+         */
+        symbol->row_height[0] = 3.7f; /* 1.85f / 0.5f */
+        symbol->row_height[1] = 2.6f; /* 1.3f / 0.5f */
+        error_number = daft_set_height(symbol, 7.0f, 14.0f); /* Note using max X for minimum and min X for maximum */
+    } else {
+        symbol->row_height[0] = 3.0f;
+        symbol->row_height[1] = 2.0f;
+        error_number = daft_set_height(symbol, 0.0f, 0.0f);
+    }
+    symbol->rows = 3;
+    symbol->width = writer - 1;
+
+    return error_number;
+}
+
+/* vim: set ts=4 sw=4 et : */