Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/zint/backend/common.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 /* common.h - Header for all common functions in common.c */
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2 /*
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3 libzint - the open source barcode library
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4 Copyright (C) 2009-2024 Robin Stuart <rstuart114@gmail.com>
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5
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6 Redistribution and use in source and binary forms, with or without
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7 modification, are permitted provided that the following conditions
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8 are met:
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9
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10 1. Redistributions of source code must retain the above copyright
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11 notice, this list of conditions and the following disclaimer.
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12 2. Redistributions in binary form must reproduce the above copyright
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13 notice, this list of conditions and the following disclaimer in the
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14 documentation and/or other materials provided with the distribution.
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15 3. Neither the name of the project nor the names of its contributors
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16 may be used to endorse or promote products derived from this software
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17 without specific prior written permission.
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19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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20 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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21 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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22 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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23 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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24 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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25 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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28 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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29 SUCH DAMAGE.
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30 */
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31 /* SPDX-License-Identifier: BSD-3-Clause */
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32
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33 #ifndef Z_COMMON_H
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34 #define Z_COMMON_H
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35
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36 #ifdef __cplusplus
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37 extern "C" {
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38 #endif /* __cplusplus */
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40 #include "zint.h"
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41 #include "zintconfig.h"
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42 #include <stdlib.h>
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43 #include <string.h>
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45 /* Determine if C89 (excluding MSVC, which doesn't define __STDC_VERSION__) */
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46 #ifndef _MSC_VER
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47 # if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199000L
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48 # define ZINT_IS_C89
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49 # endif
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50 #endif
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52 #ifdef _MSC_VER
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53 typedef unsigned __int8 uint8_t;
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54 typedef unsigned __int16 uint16_t;
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55 typedef __int32 int32_t;
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56 typedef unsigned __int32 uint32_t;
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57 typedef unsigned __int64 uint64_t;
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58 #else
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59 #include <stdint.h> /* Introduced C99 */
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60 #endif
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61
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62 /* Note if change following must also change "frontend/main.c" copy */
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64 #define ARRAY_SIZE(x) ((int) (sizeof(x) / sizeof((x)[0])))
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65
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66 #ifdef _MSC_VER
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67 # include <malloc.h>
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68 # define z_alloca(nmemb) _alloca(nmemb)
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69 #elif defined(__COMPCERT__)
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70 # define z_alloca(nmemb) malloc(nmemb) /* So links - leads to loads of leaks obs */
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71 #else
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72 # if (defined(__GNUC__) && !defined(alloca) && !defined(__NetBSD__)) || defined(__NuttX__) || defined(_AIX) \
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73 || (defined(__sun) && defined(__SVR4) /*Solaris*/)
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74 # include <alloca.h>
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75 # endif
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76 # define z_alloca(nmemb) alloca(nmemb)
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77 #endif
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78
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79 /* End of "frontend/main.c" copy */
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80
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81 #ifdef _MSC_VER
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82 # pragma warning(disable: 4125) /* decimal digit terminates octal escape sequence */
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83 # pragma warning(disable: 4244) /* conversion from int to float */
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84 # if _MSC_VER > 1200 /* VC6 */
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85 # pragma warning(disable: 4996) /* function or variable may be unsafe */
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86 # endif
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87 #endif
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88
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89 #if defined(__GNUC__) && __GNUC__ >= 3
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90 # define ZINT_FORMAT_PRINTF(fmt_idx, first_idx) __attribute__((__format__(printf, fmt_idx, first_idx)))
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91 #else
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92 # define ZINT_FORMAT_PRINTF(fmt_idx, first_idx)
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93 #endif
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94
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95 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(ZINT_TEST) && !defined(__MINGW32__)
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96 # define INTERNAL __attribute__((__visibility__("hidden")))
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97 #elif defined(ZINT_TEST)
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98 # define INTERNAL ZINT_EXTERN /* The test suite references INTERNAL functions, so they need to be exported */
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99 #else
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100 # define INTERNAL
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101 #endif
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102
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103 #if defined(__GNUC__) && __GNUC__ >= 4 && !defined(__MINGW32__)
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104 # define INTERNAL_DATA_EXTERN __attribute__((__visibility__("hidden"))) extern
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105 # define INTERNAL_DATA __attribute__((__visibility__("hidden")))
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106 #else
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107 # define INTERNAL_DATA_EXTERN extern
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108 # define INTERNAL_DATA
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109 #endif
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110
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111 #ifdef _MSC_VER
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112 # if _MSC_VER >= 1400 /* MSVC 2005 (C++ 8.0) */
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113 # define restrict __restrict
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114 # else
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115 # define restrict
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116 # endif
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117 #else
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118 # ifdef ZINT_IS_C89
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119 # define restrict
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120 # endif
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121 #endif
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122
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123 #if (defined(_MSC_VER) && _MSC_VER <= 1200) || defined(ZINT_IS_C89) /* VC6 or C89 */
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124 # define ceilf (float) ceil
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125 # define floorf (float) floor
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126 # define fmodf (float) fmod
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127 #endif
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128 /* `round()` (C99) not before MSVC 2013 (C++ 12.0) */
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129 #if (defined(_MSC_VER) && _MSC_VER < 1800) || defined(ZINT_IS_C89)
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130 # define round(arg) floor((arg) + 0.5)
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131 # define roundf(arg) floorf((arg) + 0.5f)
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132 #endif
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133
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134 /* Is float integral value? (https://stackoverflow.com/a/40404149) */
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135 #define isfintf(arg) (fmodf(arg, 1.0f) == 0.0f)
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136
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137 /* Simple versions of <ctype.h> functions with no dependence on locale */
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138 #define z_isdigit(c) ((c) <= '9' && (c) >= '0')
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139 #define z_isupper(c) ((c) >= 'A' && (c) <= 'Z')
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140 #define z_islower(c) ((c) >= 'a' && (c) <= 'z')
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141
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142 /* Helpers to cast away char pointer signedness */
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143 #define ustrlen(source) strlen((const char *) (source))
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144 #define ustrcpy(target, source) strcpy((char *) (target), (const char *) (source))
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145 #define ustrcat(target, source) strcat((char *) (target), (const char *) (source))
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146 #define ustrncat(target, source, count) strncat((char *) (target), (const char *) (source), (count))
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147
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148 /* Converts an integer value to its value + '0' (so >= 10 becomes ':', ';' etc) */
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149 #define itoc(i) ((i) + '0')
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150
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151 /* Converts a character 0-9, A-F to its equivalent integer value */
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152 INTERNAL int ctoi(const char source);
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153
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154 /* Converts decimal string of length <= 9 to integer value. Returns -1 if not numeric */
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155 INTERNAL int to_int(const unsigned char source[], const int length);
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156
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157 /* Converts lower case characters to upper case in string `source` */
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158 INTERNAL void to_upper(unsigned char source[], const int length);
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159
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160 /* Returns the number of times a character occurs in `source` */
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161 INTERNAL int chr_cnt(const unsigned char source[], const int length, const unsigned char c);
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162
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163 /* `is_chr()` & `not_sane()` flags */
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164 #define IS_SPC_F 0x0001 /* Space */
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165 #define IS_HSH_F 0x0002 /* Hash sign # */
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166 #define IS_AST_F 0x0004 /* Asterisk sign * */
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167 #define IS_PLS_F 0x0008 /* Plus sign + */
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168 #define IS_MNS_F 0x0010 /* Minus sign - */
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169 #define IS_NUM_F 0x0020 /* Number 0-9 */
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170 #define IS_UPO_F 0x0040 /* Uppercase letter, apart from A-F and X */
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171 #define IS_UHX_F 0x0080 /* Uppercase hex A-F */
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172 #define IS_UX__F 0x0100 /* Uppercase X */
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173 #define IS_LWO_F 0x0200 /* Lowercase letter, apart from a-f and x */
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174 #define IS_LHX_F 0x0400 /* Lowercase hex a-f */
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175 #define IS_LX__F 0x0800 /* Lowercase x */
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176 #define IS_C82_F 0x1000 /* CSET82 punctuation (apart from *, + and -) */
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177 #define IS_SIL_F 0x2000 /* SILVER/TECHNETIUM punctuation .$/% (apart from space, + and -) */
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178 #define IS_CLI_F 0x4000 /* CALCIUM INNER punctuation $:/. (apart from + and -) (Codabar) */
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179 #define IS_ARS_F 0x8000 /* ARSENIC uppercase subset (VIN) */
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180
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181 #define IS_UPR_F (IS_UPO_F | IS_UHX_F | IS_UX__F) /* Uppercase letters */
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182 #define IS_LWR_F (IS_LWO_F | IS_LHX_F | IS_LX__F) /* Lowercase letters */
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183
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184 /* The most commonly used set */
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185 #define NEON_F IS_NUM_F /* NEON "0123456789" */
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186
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187 /* Whether a character matches `flg` */
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188 INTERNAL int is_chr(const unsigned int flg, const unsigned int c);
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189
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190 /* Verifies if a string only uses valid characters, returning 1-based position in `source` if not, 0 for success */
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191 INTERNAL int not_sane(const unsigned int flg, const unsigned char source[], const int length);
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192
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193 /* Verifies if a string only uses valid characters as above, but also returns `test_string` position of each in
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194 `posns` array */
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195 INTERNAL int not_sane_lookup(const char test_string[], const int test_length, const unsigned char source[],
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196 const int length, int *posns);
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197
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198 /* Returns the position of `data` in `set_string`, or -1 if not found */
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199 INTERNAL int posn(const char set_string[], const char data);
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200
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201
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202 /* Converts `arg` to a string representing its binary equivalent of length `length` and places in `binary` at
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203 `bin_posn`. Returns `bin_posn` + `length` */
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204 INTERNAL int bin_append_posn(const int arg, const int length, char *binary, const int bin_posn);
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205
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206
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207 #define Z_COMMON_INLINE 1
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208
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209 #ifdef Z_COMMON_INLINE
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210
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211 # define module_is_set(s, y, x) (((s)->encoded_data[y][(x) >> 3] >> ((x) & 0x07)) & 1)
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212 # define set_module(s, y, x) do { (s)->encoded_data[y][(x) >> 3] |= 1 << ((x) & 0x07); } while (0)
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213 # define module_colour_is_set(s, y, x) ((s)->encoded_data[y][x])
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214 # define set_module_colour(s, y, x, c) do { (s)->encoded_data[y][x] = (c); } while (0)
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215 # define unset_module(s, y, x) do { (s)->encoded_data[y][(x) >> 3] &= ~(1 << ((x) & 0x07)); } while (0)
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216
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217 #else /* Z_COMMON_INLINE */
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218
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219 /* Returns true (1) if a module is dark/black, otherwise false (0) */
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220 INTERNAL int module_is_set(const struct zint_symbol *symbol, const int y_coord, const int x_coord);
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221
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222 /* Sets a module to dark/black */
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223 INTERNAL void set_module(struct zint_symbol *symbol, const int y_coord, const int x_coord);
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224
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225 /* Returns true (1-8) if a module is colour, otherwise false (0) */
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226 INTERNAL int module_colour_is_set(const struct zint_symbol *symbol, const int y_coord, const int x_coord);
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227
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228 /* Sets a module to a colour */
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229 INTERNAL void set_module_colour(struct zint_symbol *symbol, const int y_coord, const int x_coord,
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230 const int colour);
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231
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232 /* Sets a dark/black module to white (i.e. unsets) */
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233 INTERNAL void unset_module(struct zint_symbol *symbol, const int y_coord, const int x_coord);
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234
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235 #endif /* Z_COMMON_INLINE */
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236
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237
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238 /* Expands from a width pattern to a bit pattern */
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239 INTERNAL void expand(struct zint_symbol *symbol, const char data[], const int length);
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240
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241
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242 /* Set `symbol->errtxt` to "err_id: msg", returning `error_number`. If `err_id` is -1, the "err_id: " prefix is
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243 omitted */
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244 INTERNAL int errtxt(const int error_number, struct zint_symbol *symbol, const int err_id, const char *msg);
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245
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246 /* Set `symbol->errtxt` to "err_id: msg" with restricted subset of `printf()` formatting, returning `error_number`.
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247 If `err_id` is -1, the "err_id: " prefix is omitted. Only the following specifiers are supported: "c", "d", "f",
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248 "g" and "s", with no modifiers apart from "<n>$" numbering for l10n ("<n>" 1-9), in which case all specifiers must
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249 be numbered, "%s" with length precisions: "%.*s", "%<n+1>$.*<n>$s", "%.<p>s" and "%<n>$.<p>s", and "%d" with
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250 zero-padded minimum field lengths: "%0<m>d" or %<n>$0<m>d" ("<m>" 1-99) */
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251 INTERNAL int errtxtf(const int error_number, struct zint_symbol *symbol, const int err_id, const char *fmt, ...)
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252 ZINT_FORMAT_PRINTF(4, 5);
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253
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254 /* Helper to prepend/append to existing `symbol->errtxt` by calling `errtxtf(fmt)` with 2 arguments (copy of `errtxt`
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255 & `msg`) if `msg` not NULL, or 1 argument (just copy of `errtxt`) if `msg` NULL, returning `error_number` */
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256 INTERNAL int errtxt_adj(const int error_number, struct zint_symbol *symbol, const char *fmt, const char *msg);
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257
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258
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259 /* Whether `symbology` can have row binding */
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260 INTERNAL int is_stackable(const int symbology);
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261
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262 /* Whether `symbology` is EAN/UPC */
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263 INTERNAL int is_upcean(const int symbology);
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264
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265 /* Whether `symbology` can have composite 2D component data */
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266 INTERNAL int is_composite(const int symbology);
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267
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268 /* Whether `symbology` is a matrix design renderable as dots */
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269 INTERNAL int is_dotty(const int symbology);
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270
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271 /* Whether `symbology` has a fixed aspect ratio (matrix design) */
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272 INTERNAL int is_fixed_ratio(const int symbology);
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273
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274
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275 /* Whether next two characters are digits */
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276 INTERNAL int is_twodigits(const unsigned char source[], const int length, const int position);
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277
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278 /* Returns how many consecutive digits lie immediately ahead up to `max`, or all if `max` is -1 */
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279 INTERNAL int cnt_digits(const unsigned char source[], const int length, const int position, const int max);
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280
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281
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282 /* State machine to decode UTF-8 to Unicode codepoints (state 0 means done, state 12 means error) */
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283 INTERNAL unsigned int decode_utf8(unsigned int *state, unsigned int *codep, const unsigned char byte);
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284
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285 /* Is string valid UTF-8? */
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286 INTERNAL int is_valid_utf8(const unsigned char source[], const int length);
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287
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288 /* Converts UTF-8 to Unicode. If `disallow_4byte` unset, allows all values (UTF-32). If `disallow_4byte` set,
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289 * only allows codepoints <= U+FFFF (ie four-byte sequences not allowed) (UTF-16, no surrogates) */
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290 INTERNAL int utf8_to_unicode(struct zint_symbol *symbol, const unsigned char source[], unsigned int vals[],
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291 int *length, const int disallow_4byte);
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292
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293 /* Treats source as ISO/IEC 8859-1 and copies into `symbol->text`, converting to UTF-8. Control chars (incl. DEL) and
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294 non-ISO/IEC 8859-1 (0x80-9F) are replaced with spaces. Returns warning if truncated, else 0 */
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295 INTERNAL int hrt_cpy_iso8859_1(struct zint_symbol *symbol, const unsigned char source[], const int length);
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296
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297
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298 /* Sets symbol height, returning a warning if not within minimum and/or maximum if given.
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299 `default_height` does not include height of fixed-height rows (i.e. separators/composite data) */
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300 INTERNAL int set_height(struct zint_symbol *symbol, const float min_row_height, const float default_height,
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301 const float max_height, const int no_errtxt);
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302
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303
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304 /* Removes excess precision from floats - see https://stackoverflow.com/q/503436 */
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305 INTERNAL float stripf(const float arg);
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306
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307
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308 /* Returns total length of segments */
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309 INTERNAL int segs_length(const struct zint_seg segs[], const int seg_count);
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310
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311 /* Shallow copies segments, adjusting default ECIs */
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312 INTERNAL void segs_cpy(const struct zint_symbol *symbol, const struct zint_seg segs[], const int seg_count,
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313 struct zint_seg local_segs[]);
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314
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315
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316 /* Helper for ZINT_DEBUG_PRINT to put all but graphical ASCII in hex escapes. Output to `buf` if non-NULL, else
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317 stdout */
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318 INTERNAL char *debug_print_escape(const unsigned char *source, const int first_len, char *buf);
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319
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320 #ifdef ZINT_TEST
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321 /* Dumps hex-formatted codewords in symbol->errtxt (for use in testing) */
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322 INTERNAL void debug_test_codeword_dump(struct zint_symbol *symbol, const unsigned char *codewords, const int length);
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323 /* Dumps decimal-formatted codewords in symbol->errtxt (for use in testing) */
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324 INTERNAL void debug_test_codeword_dump_short(struct zint_symbol *symbol, const short *codewords, const int length);
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325 /* Dumps decimal-formatted codewords in symbol->errtxt (for use in testing) */
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326 INTERNAL void debug_test_codeword_dump_int(struct zint_symbol *symbol, const int *codewords, const int length);
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327 #endif
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328
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329 #ifdef __cplusplus
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330 }
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331 #endif /* __cplusplus */
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332
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333 /* vim: set ts=4 sw=4 et : */
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334 #endif /* Z_COMMON_H */