Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/include/mupdf/fitz/getopt.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 // Copyright (C) 2004-2021 Artifex Software, Inc.
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2 //
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3 // This file is part of MuPDF.
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4 //
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5 // MuPDF is free software: you can redistribute it and/or modify it under the
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6 // terms of the GNU Affero General Public License as published by the Free
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7 // Software Foundation, either version 3 of the License, or (at your option)
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8 // any later version.
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9 //
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10 // MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
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11 // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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12 // FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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13 // details.
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14 //
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15 // You should have received a copy of the GNU Affero General Public License
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16 // along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
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17 //
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18 // Alternative licensing terms are available from the licensor.
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19 // For commercial licensing, see <https://www.artifex.com/> or contact
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20 // Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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21 // CA 94129, USA, for further information.
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23 #ifndef MUPDF_FITZ_GETOPT_H
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24 #define MUPDF_FITZ_GETOPT_H
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26 #include "export.h"
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28 typedef struct
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29 {
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30 char *option;
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31 int *flag;
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32 void *opaque;
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33 } fz_getopt_long_options;
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35 /**
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36 Simple functions/variables for use in tools.
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38 ostr = option string. Comprises single letter options, followed by : if there
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39 is an argument to the option.
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41 longopts: NULL (indicating no long options), or a pointer to an array of
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42 longoptions, terminated by an entry with option == NULL.
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44 In the event of matching a single char option, this function will normally
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45 return the char. The exception to this is when the option requires an
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46 argument and none is supplied; in this case we return ':'.
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48 In the event of matching a long option, this function returns 0, with fz_optlong
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49 set to point to the matching option.
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51 A long option entry may be followed with : to indicate there is an argument to the
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52 option. If the need for an argument is specified in this way, and no argument is
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53 given, an error will be displayed and argument processing will stop. If an argument
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54 is given, and the long option record contains a non-null flag pointer, then the code
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55 will decode the argument and fill in that flag pointer. Specifically,
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56 case-insensitive matches to 'yes', 'no', 'true' and 'false' will cause a value of 0
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57 or 1 as appropriate to be written; failing this the arg will be interpreted as a
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58 decimal integer using atoi.
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60 A long option entry may be followed by an list of options (e.g. myoption=foo|bar|baz)
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61 and the option will be passed to fz_opt_from_list. The return value of that will be
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62 placed in fz_optitem. If the return value of that function is -1, then an error will
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63 be displayed and argument processing will stop.
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65 In the event of reaching the end of the arg list or '--', this function returns EOF.
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67 In the event of failing to match anything, an error is printed, and we return '?'.
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68
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69 If an argument is expected for the option, then fz_optarg will be returned pointing
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70 at the start of the argument. Examples of supported argument formats: '-r500', '-r 500',
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71 '--resolution 500', '--resolution=500'.
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72 */
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73 extern int fz_getopt_long(int nargc, char * const *nargv, const char *ostr, const fz_getopt_long_options *longopts);
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75 /**
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76 Identical to fz_getopt_long, but with a NULL longopts field, signifying no long
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77 options.
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78 */
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79 extern int fz_getopt(int nargc, char * const *nargv, const char *ostr);
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80
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81 /**
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82 fz_optind is updated to point to the current index being read from the
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83 arguments.
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84 */
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85 FZ_DATA extern int fz_optind;
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86
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87 /**
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88 fz_optarg is a pointer to the argument data for the most recently
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89 read option.
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90 */
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91 FZ_DATA extern char *fz_optarg;
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92
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93 /**
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94 fz_optlong is a pointer to the record for the most recently
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95 read long option. (i.e. if a long option is detected, this
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96 will be set to point to the record for that option, otherwise
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97 it will be NULL).
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98 */
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99 FZ_DATA extern const fz_getopt_long_options *fz_optlong;
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100
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101 /**
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102 The item number for the most recently matched item list.
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103
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104 First item in the list is numbered 0. No match is -1.
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105 */
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106 FZ_DATA extern int fz_optitem;
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107
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108 /**
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109 Return the index of a (case-insensitive) option within an optlist.
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110
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111 For instance for optlist = "Foo|Bar|Baz", and opt = "bar",
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112 this would return 1.
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113
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114 If the optlist ends with "|*" then that is a catch all case and
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115 matches all options allowing the caller to process it itself.
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116 fz_optarg will be set to point to the option, and the return
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117 value will be the index of the '*' option within that list.
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118
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119 If an optlist entry ends with ':' (e.g. "Foo:") then that option
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120 may have suboptions appended to it (for example "JPG:80") and
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121 fz_optarg will be set to point at "80". Otherwise fz_optarg will
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122 be set to NULL.
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123
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124 In the event of no-match found, prints an error and returns -1.
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125 */
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126 int fz_opt_from_list(char *opt, const char *optlist);
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127
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128 /**
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129 Convert "-" to "/dev/stdout" for use with command lines.
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130 Also converts "nul" and "con" on Windows.
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131 */
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132 char *fz_optpath(char *opt);
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133
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134 #endif