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Merge pull request #2945 from ethomson/empty_hashsig_heap

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diff_tform: don't compare empty hashsig_heaps
This commit is contained in:
Carlos Martín Nieto 2015-03-04 12:47:59 +01:00
commit c69c042e0e
2 changed files with 116 additions and 1 deletions
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17
src/hashsig.c
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@ -34,6 +34,7 @@ typedef struct {
struct git_hashsig {
hashsig_heap mins;
hashsig_heap maxs;
size_t lines;
git_hashsig_option_t opt;
};
@ -185,8 +186,10 @@ static int hashsig_add_hashes(
++scan;
/* check run terminator */
if (ch == '\n' || ch == '\0')
if (ch == '\n' || ch == '\0') {
sig->lines++;
break;
}
++len;
HASHSIG_HASH_MIX(state, ch);
@ -333,6 +336,18 @@ static int hashsig_heap_compare(const hashsig_heap *a, const hashsig_heap *b)
int git_hashsig_compare(const git_hashsig *a, const git_hashsig *b)
{
/* if we have no elements in either file then each file is either
* empty or blank. if we're ignoring whitespace then the files are
* similar, otherwise they're dissimilar.
*/
if (a->mins.size == 0 && b->mins.size == 0) {
if ((!a->lines && !b->lines) ||
(a->opt & GIT_HASHSIG_IGNORE_WHITESPACE))
return HASHSIG_SCALE;
else
return 0;
}
/* if we have fewer than the maximum number of elements, then just use
* one array since the two arrays will be the same
*/

100
tests/diff/rename.c
View File

@ -1602,3 +1602,103 @@ void test_diff_rename__by_config_doesnt_mess_with_whitespace_settings(void)
git_tree_free(tree1);
git_tree_free(tree2);
}
static void expect_files_renamed(const char *one, const char *two, uint32_t whitespace_flags)
{
git_index *index;
git_diff *diff = NULL;
diff_expects exp;
git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
git_diff_find_options findopts = GIT_DIFF_FIND_OPTIONS_INIT;
diffopts.flags = GIT_DIFF_INCLUDE_UNTRACKED;
findopts.flags = GIT_DIFF_FIND_FOR_UNTRACKED |
GIT_DIFF_FIND_AND_BREAK_REWRITES |
GIT_DIFF_FIND_RENAMES_FROM_REWRITES |
whitespace_flags;
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_rewritefile("renames/ikeepsix.txt", one);
cl_git_pass(git_index_add_bypath(index, "ikeepsix.txt"));
cl_git_rmfile("renames/ikeepsix.txt");
cl_git_rewritefile("renames/ikeepsix2.txt", two);
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, &diffopts));
cl_git_pass(git_diff_find_similar(diff, &findopts));
memset(&exp, 0, sizeof(exp));
cl_git_pass(git_diff_foreach(
diff, diff_file_cb, diff_hunk_cb, diff_line_cb, &exp));
cl_assert_equal_i(1, exp.files);
cl_assert_equal_i(1, exp.file_status[GIT_DELTA_RENAMED]);
git_diff_free(diff);
git_index_free(index);
}
/* test some variations on empty and blank files */
void test_diff_rename__empty_files_renamed(void)
{
/* empty files are identical when ignoring whitespace or not */
expect_files_renamed("", "", GIT_DIFF_FIND_DONT_IGNORE_WHITESPACE);
expect_files_renamed("", "", GIT_DIFF_FIND_IGNORE_WHITESPACE);
}
/* test that blank files are similar when ignoring whitespace */
void test_diff_rename__blank_files_renamed_when_ignoring_whitespace(void)
{
expect_files_renamed("", "\n\n", GIT_DIFF_FIND_IGNORE_WHITESPACE);
expect_files_renamed("", "\r\n\r\n", GIT_DIFF_FIND_IGNORE_WHITESPACE);
expect_files_renamed("\r\n\r\n", "\n\n\n", GIT_DIFF_FIND_IGNORE_WHITESPACE);
expect_files_renamed(" ", "\n\n", GIT_DIFF_FIND_IGNORE_WHITESPACE);
expect_files_renamed(" \n \n", "\n\n", GIT_DIFF_FIND_IGNORE_WHITESPACE);
}
/* blank files are not similar when whitespace is not ignored */
static void expect_files_not_renamed(const char *one, const char *two, uint32_t whitespace_flags)
{
git_index *index;
git_diff *diff = NULL;
diff_expects exp;
git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
git_diff_find_options findopts = GIT_DIFF_FIND_OPTIONS_INIT;
diffopts.flags = GIT_DIFF_INCLUDE_UNTRACKED;
findopts.flags = GIT_DIFF_FIND_FOR_UNTRACKED |
whitespace_flags;
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_rewritefile("renames/ikeepsix.txt", one);
cl_git_pass(git_index_add_bypath(index, "ikeepsix.txt"));
cl_git_rmfile("renames/ikeepsix.txt");
cl_git_rewritefile("renames/ikeepsix2.txt", two);
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, &diffopts));
cl_git_pass(git_diff_find_similar(diff, &findopts));
memset(&exp, 0, sizeof(exp));
cl_git_pass(git_diff_foreach(
diff, diff_file_cb, diff_hunk_cb, diff_line_cb, &exp));
cl_assert_equal_i(2, exp.files);
cl_assert_equal_i(1, exp.file_status[GIT_DELTA_DELETED]);
cl_assert_equal_i(1, exp.file_status[GIT_DELTA_UNTRACKED]);
git_diff_free(diff);
git_index_free(index);
}
/* test that blank files are similar when ignoring renames */
void test_diff_rename__blank_files_not_renamed_when_not_ignoring_whitespace(void)
{
expect_files_not_renamed("", "\r\n\r\n\r\n", GIT_DIFF_FIND_DONT_IGNORE_WHITESPACE);
expect_files_not_renamed("", "\n\n\n\n", GIT_DIFF_FIND_DONT_IGNORE_WHITESPACE);
expect_files_not_renamed("\n\n\n\n", "\r\n\r\n\r\n", GIT_DIFF_FIND_DONT_IGNORE_WHITESPACE);
}