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annotate src/libmlk-core/core/vfs-zip.c @ 411:d74f53299252

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make: add basic GNU make support
author David Demelier <markand@malikania.fr>
date Fri, 07 Oct 2022 14:35:31 +0200
parents 460c78706989
children
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1 /*
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2 * vfs-zip.c -- VFS subsystem for zip archives
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3 *
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4 * Copyright (c) 2020-2022 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include "config.h"
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20
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21 #if defined(MLK_WITH_ZIP)
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22
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23 #include <assert.h>
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24 #include <string.h>
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25
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26 #include <zip.h>
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27
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28 #include "error.h"
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29 #include "vfs-zip.h"
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30 #include "vfs.h"
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31
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32 static inline int
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33 mkflags(const char *mode)
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34 {
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35 /* TODO: this should check for mutual exclusions. */
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36 int flags = 0;
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37
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38 for (; *mode; ++mode) {
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39 switch (*mode) {
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40 case 'w':
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41 flags |= ZIP_CREATE;
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42 break;
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43 case 'x':
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44 flags |= ZIP_EXCL;
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45 break;
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46 case '+':
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47 flags |= ZIP_TRUNCATE;
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48 break;
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49 case 'r':
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50 flags |= ZIP_RDONLY;
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51 break;
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52 default:
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53 break;
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54 }
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55 }
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56
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57 return flags;
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58 }
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59
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60 static size_t
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61 file_read(struct vfs_file *file, void *buf, size_t bufsz)
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62 {
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63 return zip_fread(file->data, buf, bufsz);
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64 }
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65
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66 static size_t
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67 file_write(struct vfs_file *file, const void *buf, size_t bufsz)
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68 {
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69 (void)file;
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70 (void)buf;
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71 (void)bufsz;
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72
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73 return errorf("operation not supported");
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74 }
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75
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76 static int
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77 file_flush(struct vfs_file *file)
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78 {
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79 (void)file;
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80
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81 return 0;
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82 }
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83
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84 static void
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85 file_finish(struct vfs_file *file)
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86 {
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87 zip_fclose(file->data);
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88 }
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89
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90 static int
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91 impl_open(struct vfs *vfs, struct vfs_file *file, const char *entry, const char *mode)
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92 {
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93 (void)mode;
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94
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95 if (!(file->data = zip_fopen(vfs->data, entry, 0)))
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96 return errorf("unable to open file in archive");
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97
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98 file->read = file_read;
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99 file->write = file_write;
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100 file->flush = file_flush;
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101 file->finish = file_finish;
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102
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103 return 0;
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104 }
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105
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106 static void
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107 impl_finish(struct vfs *vfs)
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108 {
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109 zip_close(vfs->data);
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110 }
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111
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112 int
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113 vfs_zip(struct vfs *vfs, const char *file, const char *mode)
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114 {
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115 assert(vfs);
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116 assert(file);
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117
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118 memset(vfs, 0, sizeof (*vfs));
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119
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120 if (!(vfs->data = zip_open(file, mkflags(mode), NULL)))
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121 return errorf("%s: unable to open zip file", file);
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122
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123 vfs->open = impl_open;
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124 vfs->finish = impl_finish;
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125
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126 return 0;
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127 }
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128
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129 #endif /* !MLK_WITH_ZIP */