1 files changed, 163 insertions, 0 deletions
diff --git a/tests/libgit2/filter/custom_helpers.c b/tests/libgit2/filter/custom_helpers.c
new file mode 100644
index 000000000..95a9f978e
--- /dev/null
+++ b/tests/libgit2/filter/custom_helpers.c
@@ -0,0 +1,163 @@
+#include "clar_libgit2.h"
+#include "posix.h"
+#include "filter.h"
+#include "git2/sys/filter.h"
+#include "custom_helpers.h"
+
+#define VERY_SECURE_ENCRYPTION(b) ((b) ^ 0xff)
+
+int bitflip_filter_apply(
+	git_filter     *self,
+	void          **payload,
+	git_str        *to,
+	const git_str  *from,
+	const git_filter_source *source)
+{
+	const unsigned char *src = (const unsigned char *)from->ptr;
+	unsigned char *dst;
+	size_t i;
+
+	GIT_UNUSED(self); GIT_UNUSED(payload);
+
+	/* verify that attribute path match worked as expected */
+	cl_assert_equal_i(
+		0, git__strncmp("hero", git_filter_source_path(source), 4));
+
+	if (!from->size)
+		return 0;
+
+	cl_git_pass(git_str_grow(to, from->size));
+
+	dst = (unsigned char *)to->ptr;
+
+	for (i = 0; i < from->size; i++)
+		dst[i] = VERY_SECURE_ENCRYPTION(src[i]);
+
+	to->size = from->size;
+
+	return 0;
+}
+
+static int bitflip_filter_stream(
+	git_writestream **out,
+	git_filter *self,
+	void **payload,
+	const git_filter_source *src,
+	git_writestream *next)
+{
+	return git_filter_buffered_stream_new(out,
+		self, bitflip_filter_apply, NULL, payload, src, next);
+}
+
+static void bitflip_filter_free(git_filter *f)
+{
+	git__free(f);
+}
+
+git_filter *create_bitflip_filter(void)
+{
+	git_filter *filter = git__calloc(1, sizeof(git_filter));
+	cl_assert(filter);
+
+	filter->version = GIT_FILTER_VERSION;
+	filter->attributes = "+bitflip";
+	filter->shutdown = bitflip_filter_free;
+	filter->stream = bitflip_filter_stream;
+
+	return filter;
+}
+
+
+int reverse_filter_apply(
+	git_filter     *self,
+	void          **payload,
+	git_str        *to,
+	const git_str  *from,
+	const git_filter_source *source)
+{
+	const unsigned char *src = (const unsigned char *)from->ptr;
+	const unsigned char *end = src + from->size;
+	unsigned char *dst;
+
+	GIT_UNUSED(self); GIT_UNUSED(payload); GIT_UNUSED(source);
+
+	/* verify that attribute path match worked as expected */
+	cl_assert_equal_i(
+		0, git__strncmp("hero", git_filter_source_path(source), 4));
+
+	if (!from->size)
+		return 0;
+
+	cl_git_pass(git_str_grow(to, from->size));
+
+	dst = (unsigned char *)to->ptr + from->size - 1;
+
+	while (src < end)
+		*dst-- = *src++;
+
+	to->size = from->size;
+
+	return 0;
+}
+
+static int reverse_filter_stream(
+	git_writestream **out,
+	git_filter *self,
+	void **payload,
+	const git_filter_source *src,
+	git_writestream *next)
+{
+	return git_filter_buffered_stream_new(out,
+		self, reverse_filter_apply, NULL, payload, src, next);
+}
+
+static void reverse_filter_free(git_filter *f)
+{
+	git__free(f);
+}
+
+git_filter *create_reverse_filter(const char *attrs)
+{
+	git_filter *filter = git__calloc(1, sizeof(git_filter));
+	cl_assert(filter);
+
+	filter->version = GIT_FILTER_VERSION;
+	filter->attributes = attrs;
+	filter->shutdown = reverse_filter_free;
+	filter->stream = reverse_filter_stream;
+
+	return filter;
+}
+
+static int erroneous_filter_stream(
+	git_writestream **out,
+	git_filter *self,
+	void **payload,
+	const git_filter_source *src,
+	git_writestream *next)
+{
+	GIT_UNUSED(out);
+	GIT_UNUSED(self);
+	GIT_UNUSED(payload);
+	GIT_UNUSED(src);
+	GIT_UNUSED(next);
+	return -1;
+}
+
+static void erroneous_filter_free(git_filter *f)
+{
+	git__free(f);
+}
+
+git_filter *create_erroneous_filter(const char *attrs)
+{
+	git_filter *filter = git__calloc(1, sizeof(git_filter));
+	cl_assert(filter);
+
+	filter->version = GIT_FILTER_VERSION;
+	filter->attributes = attrs;
+	filter->stream = erroneous_filter_stream;
+	filter->shutdown = erroneous_filter_free;
+
+	return filter;
+}