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63924435 ET |
1 | #include "clar_libgit2.h" |
2 | #include "posix.h" | |
3 | #include "filter.h" | |
63924435 | 4 | #include "git2/sys/filter.h" |
e579e0f7 | 5 | #include "custom_helpers.h" |
63924435 ET |
6 | |
7 | #define VERY_SECURE_ENCRYPTION(b) ((b) ^ 0xff) | |
8 | ||
9 | int bitflip_filter_apply( | |
10 | git_filter *self, | |
11 | void **payload, | |
e579e0f7 MB |
12 | git_str *to, |
13 | const git_str *from, | |
63924435 ET |
14 | const git_filter_source *source) |
15 | { | |
16 | const unsigned char *src = (const unsigned char *)from->ptr; | |
17 | unsigned char *dst; | |
18 | size_t i; | |
19 | ||
20 | GIT_UNUSED(self); GIT_UNUSED(payload); | |
21 | ||
22 | /* verify that attribute path match worked as expected */ | |
23 | cl_assert_equal_i( | |
24 | 0, git__strncmp("hero", git_filter_source_path(source), 4)); | |
25 | ||
26 | if (!from->size) | |
27 | return 0; | |
28 | ||
e579e0f7 | 29 | cl_git_pass(git_str_grow(to, from->size)); |
63924435 ET |
30 | |
31 | dst = (unsigned char *)to->ptr; | |
32 | ||
33 | for (i = 0; i < from->size; i++) | |
34 | dst[i] = VERY_SECURE_ENCRYPTION(src[i]); | |
35 | ||
36 | to->size = from->size; | |
37 | ||
38 | return 0; | |
39 | } | |
40 | ||
c25aa7cd PP |
41 | static int bitflip_filter_stream( |
42 | git_writestream **out, | |
43 | git_filter *self, | |
44 | void **payload, | |
45 | const git_filter_source *src, | |
46 | git_writestream *next) | |
47 | { | |
48 | return git_filter_buffered_stream_new(out, | |
49 | self, bitflip_filter_apply, NULL, payload, src, next); | |
50 | } | |
51 | ||
63924435 ET |
52 | static void bitflip_filter_free(git_filter *f) |
53 | { | |
54 | git__free(f); | |
55 | } | |
56 | ||
57 | git_filter *create_bitflip_filter(void) | |
58 | { | |
59 | git_filter *filter = git__calloc(1, sizeof(git_filter)); | |
60 | cl_assert(filter); | |
61 | ||
62 | filter->version = GIT_FILTER_VERSION; | |
63 | filter->attributes = "+bitflip"; | |
64 | filter->shutdown = bitflip_filter_free; | |
c25aa7cd | 65 | filter->stream = bitflip_filter_stream; |
63924435 ET |
66 | |
67 | return filter; | |
68 | } | |
69 | ||
70 | ||
71 | int reverse_filter_apply( | |
72 | git_filter *self, | |
73 | void **payload, | |
e579e0f7 MB |
74 | git_str *to, |
75 | const git_str *from, | |
63924435 ET |
76 | const git_filter_source *source) |
77 | { | |
78 | const unsigned char *src = (const unsigned char *)from->ptr; | |
79 | const unsigned char *end = src + from->size; | |
80 | unsigned char *dst; | |
81 | ||
82 | GIT_UNUSED(self); GIT_UNUSED(payload); GIT_UNUSED(source); | |
83 | ||
84 | /* verify that attribute path match worked as expected */ | |
85 | cl_assert_equal_i( | |
86 | 0, git__strncmp("hero", git_filter_source_path(source), 4)); | |
87 | ||
88 | if (!from->size) | |
89 | return 0; | |
90 | ||
e579e0f7 | 91 | cl_git_pass(git_str_grow(to, from->size)); |
63924435 ET |
92 | |
93 | dst = (unsigned char *)to->ptr + from->size - 1; | |
94 | ||
95 | while (src < end) | |
96 | *dst-- = *src++; | |
97 | ||
98 | to->size = from->size; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
c25aa7cd PP |
103 | static int reverse_filter_stream( |
104 | git_writestream **out, | |
105 | git_filter *self, | |
106 | void **payload, | |
107 | const git_filter_source *src, | |
108 | git_writestream *next) | |
109 | { | |
110 | return git_filter_buffered_stream_new(out, | |
111 | self, reverse_filter_apply, NULL, payload, src, next); | |
112 | } | |
113 | ||
63924435 ET |
114 | static void reverse_filter_free(git_filter *f) |
115 | { | |
116 | git__free(f); | |
117 | } | |
118 | ||
119 | git_filter *create_reverse_filter(const char *attrs) | |
120 | { | |
121 | git_filter *filter = git__calloc(1, sizeof(git_filter)); | |
122 | cl_assert(filter); | |
123 | ||
124 | filter->version = GIT_FILTER_VERSION; | |
125 | filter->attributes = attrs; | |
126 | filter->shutdown = reverse_filter_free; | |
c25aa7cd | 127 | filter->stream = reverse_filter_stream; |
63924435 ET |
128 | |
129 | return filter; | |
130 | } | |
cf07db2f | 131 | |
e579e0f7 | 132 | static int erroneous_filter_stream( |
cf07db2f PS |
133 | git_writestream **out, |
134 | git_filter *self, | |
135 | void **payload, | |
136 | const git_filter_source *src, | |
137 | git_writestream *next) | |
138 | { | |
139 | GIT_UNUSED(out); | |
140 | GIT_UNUSED(self); | |
141 | GIT_UNUSED(payload); | |
142 | GIT_UNUSED(src); | |
143 | GIT_UNUSED(next); | |
144 | return -1; | |
145 | } | |
146 | ||
147 | static void erroneous_filter_free(git_filter *f) | |
148 | { | |
149 | git__free(f); | |
150 | } | |
151 | ||
152 | git_filter *create_erroneous_filter(const char *attrs) | |
153 | { | |
154 | git_filter *filter = git__calloc(1, sizeof(git_filter)); | |
155 | cl_assert(filter); | |
156 | ||
157 | filter->version = GIT_FILTER_VERSION; | |
158 | filter->attributes = attrs; | |
159 | filter->stream = erroneous_filter_stream; | |
160 | filter->shutdown = erroneous_filter_free; | |
161 | ||
162 | return filter; | |
163 | } |