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#include "clar_libgit2.h"
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#include "posix.h"
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#include "filter.h"
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#include "buf_text.h"
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#include "git2/sys/filter.h"
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#define VERY_SECURE_ENCRYPTION(b) ((b) ^ 0xff)
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int bitflip_filter_apply(
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git_filter *self,
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void **payload,
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git_buf *to,
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const git_buf *from,
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const git_filter_source *source)
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{
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const unsigned char *src = (const unsigned char *)from->ptr;
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unsigned char *dst;
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size_t i;
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GIT_UNUSED(self); GIT_UNUSED(payload);
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/* verify that attribute path match worked as expected */
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cl_assert_equal_i(
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0, git__strncmp("hero", git_filter_source_path(source), 4));
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if (!from->size)
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return 0;
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cl_git_pass(git_buf_grow(to, from->size));
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dst = (unsigned char *)to->ptr;
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for (i = 0; i < from->size; i++)
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dst[i] = VERY_SECURE_ENCRYPTION(src[i]);
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to->size = from->size;
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return 0;
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}
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static void bitflip_filter_free(git_filter *f)
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{
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git__free(f);
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}
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git_filter *create_bitflip_filter(void)
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{
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git_filter *filter = git__calloc(1, sizeof(git_filter));
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cl_assert(filter);
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filter->version = GIT_FILTER_VERSION;
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filter->attributes = "+bitflip";
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filter->shutdown = bitflip_filter_free;
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filter->apply = bitflip_filter_apply;
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return filter;
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}
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int reverse_filter_apply(
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git_filter *self,
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void **payload,
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git_buf *to,
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const git_buf *from,
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const git_filter_source *source)
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{
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const unsigned char *src = (const unsigned char *)from->ptr;
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const unsigned char *end = src + from->size;
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unsigned char *dst;
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GIT_UNUSED(self); GIT_UNUSED(payload); GIT_UNUSED(source);
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/* verify that attribute path match worked as expected */
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cl_assert_equal_i(
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0, git__strncmp("hero", git_filter_source_path(source), 4));
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if (!from->size)
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return 0;
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cl_git_pass(git_buf_grow(to, from->size));
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dst = (unsigned char *)to->ptr + from->size - 1;
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while (src < end)
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*dst-- = *src++;
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to->size = from->size;
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return 0;
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}
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static void reverse_filter_free(git_filter *f)
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{
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git__free(f);
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}
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git_filter *create_reverse_filter(const char *attrs)
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{
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git_filter *filter = git__calloc(1, sizeof(git_filter));
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cl_assert(filter);
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filter->version = GIT_FILTER_VERSION;
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filter->attributes = attrs;
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filter->shutdown = reverse_filter_free;
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filter->apply = reverse_filter_apply;
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return filter;
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}
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int erroneous_filter_stream(
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git_writestream **out,
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git_filter *self,
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void **payload,
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const git_filter_source *src,
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git_writestream *next)
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{
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GIT_UNUSED(out);
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GIT_UNUSED(self);
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GIT_UNUSED(payload);
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GIT_UNUSED(src);
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GIT_UNUSED(next);
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return -1;
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}
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static void erroneous_filter_free(git_filter *f)
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{
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git__free(f);
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}
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git_filter *create_erroneous_filter(const char *attrs)
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{
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git_filter *filter = git__calloc(1, sizeof(git_filter));
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cl_assert(filter);
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filter->version = GIT_FILTER_VERSION;
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filter->attributes = attrs;
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filter->stream = erroneous_filter_stream;
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filter->shutdown = erroneous_filter_free;
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return filter;
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}
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