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Commit 9eb9e5fa by Edward Thomson
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iterator: cleanups 

Remove some unused functions, refactor some ugliness.
parent d712c2b2
Showing with 53 additions and 365 deletions
src/diff.c
......@@ -1229,9 +1229,8 @@ int git_diff__from_iterators(
/* make iterators have matching icase behavior */
if (DIFF_FLAG_IS_SET(diff, GIT_DIFF_IGNORE_CASE)) {
if ((error = git_iterator_set_ignore_case(old_iter, true)) < 0 ||
(error = git_iterator_set_ignore_case(new_iter, true)) < 0)
goto cleanup;
git_iterator_set_ignore_case(old_iter, true);
git_iterator_set_ignore_case(new_iter, true);
}
/* finish initialization */
......
src/iterator.c
......@@ -13,42 +13,6 @@
#include "submodule.h"
#include <ctype.h>
#define ITERATOR_SET_CB(P,NAME_LC) do { \
(P)->cb.current = NAME_LC ## _iterator__current; \
(P)->cb.advance = NAME_LC ## _iterator__advance; \
(P)->cb.advance_into = NAME_LC ## _iterator__advance_into; \
(P)->cb.reset = NAME_LC ## _iterator__reset; \
(P)->cb.reset_range = NAME_LC ## _iterator__reset_range; \
(P)->cb.at_end = NAME_LC ## _iterator__at_end; \
(P)->cb.free = NAME_LC ## _iterator__free; \
} while (0)
#define ITERATOR_CASE_FLAGS \
(GIT_ITERATOR_IGNORE_CASE | GIT_ITERATOR_DONT_IGNORE_CASE)
#define ITERATOR_BASE_INIT(P,NAME_LC,NAME_UC,REPO) do { \
(P)->base.type = GIT_ITERATOR_TYPE_ ## NAME_UC; \
(P)->base.cb = &(P)->cb; \
ITERATOR_SET_CB(P,NAME_LC); \
(P)->base.repo = (REPO); \
(P)->base.start = options && options->start ? \
git__strdup(options->start) : NULL; \
(P)->base.end = options && options->end ? \
git__strdup(options->end) : NULL; \
if ((options && options->start && !(P)->base.start) || \
(options && options->end && !(P)->base.end)) { \
git__free(P); return -1; } \
(P)->base.strcomp = git__strcmp; \
(P)->base.strncomp = git__strncmp; \
(P)->base.prefixcomp = git__prefixcmp; \
(P)->base.flags = options ? options->flags & ~ITERATOR_CASE_FLAGS : 0; \
if ((P)->base.flags & GIT_ITERATOR_DONT_AUTOEXPAND) \
(P)->base.flags |= GIT_ITERATOR_INCLUDE_TREES; \
if (options && options->pathlist.count && \
iterator_pathlist__init(&P->base, &options->pathlist) < 0) { \
git__free(P); return -1; } \
} while (0)
#define GIT_ITERATOR_FIRST_ACCESS (1 << 15)
#define GIT_ITERATOR_HONOR_IGNORES (1 << 16)
#define GIT_ITERATOR_IGNORE_DOT_GIT (1 << 17)
......@@ -63,220 +27,22 @@
#define iterator__honor_ignores(I) iterator__flag(I,HONOR_IGNORES)
#define iterator__ignore_dot_git(I) iterator__flag(I,IGNORE_DOT_GIT)
#define iterator__end(I) ((git_iterator *)(I))->end
#define iterator__past_end(I,PATH) \
(iterator__end(I) && ((git_iterator *)(I))->prefixcomp((PATH),iterator__end(I)) > 0)
typedef enum {
ITERATOR_PATHLIST_NONE = 0,
ITERATOR_PATHLIST_MATCH = 1,
ITERATOR_PATHLIST_MATCH_DIRECTORY = 2,
ITERATOR_PATHLIST_MATCH_CHILD = 3,
} iterator_pathlist__match_t;
static int iterator_pathlist__init(git_iterator *iter, git_strarray *pathspec)
{
size_t i;
if (git_vector_init(&iter->pathlist, pathspec->count,
(git_vector_cmp)iter->strcomp) < 0)
return -1;
for (i = 0; i < pathspec->count; i++) {
if (!pathspec->strings[i])
continue;
if (git_vector_insert(&iter->pathlist, pathspec->strings[i]) < 0)
return -1;
}
git_vector_sort(&iter->pathlist);
return 0;
}
static iterator_pathlist__match_t iterator_pathlist__match(
git_iterator *iter, const char *path, size_t path_len)
{
const char *p;
size_t idx;
int error;
error = git_vector_bsearch2(&idx, &iter->pathlist,
(git_vector_cmp)iter->strcomp, path);
if (error == 0)
return ITERATOR_PATHLIST_MATCH;
/* at this point, the path we're examining may be a directory (though we
* don't know that yet, since we're avoiding a stat unless it's necessary)
* so see if the pathlist contains a file beneath this directory.
*/
while ((p = git_vector_get(&iter->pathlist, idx)) != NULL) {
if (iter->prefixcomp(p, path) != 0)
break;
/* an exact match would have been matched by the bsearch above */
assert(p[path_len]);
/* is this a literal directory entry (eg `foo/`) or a file beneath */
if (p[path_len] == '/') {
return (p[path_len+1] == '\0') ?
ITERATOR_PATHLIST_MATCH_DIRECTORY :
ITERATOR_PATHLIST_MATCH_CHILD;
}
if (p[path_len] > '/')
break;
idx++;
}
return ITERATOR_PATHLIST_NONE;
}
static void iterator_pathlist_walk__reset(git_iterator *iter)
{
iter->pathlist_walk_idx = 0;
}
/* walker for the index iterator that allows it to walk the sorted pathlist
* entries alongside the sorted index entries. the `iter->pathlist_walk_idx`
* stores the starting position for subsequent calls, the position is advanced
* along with the index iterator, with a special case for handling directories
* in the pathlist that are specified without trailing '/'. (eg, `foo`).
* we do not advance over these entries until we're certain that the index
* iterator will not ask us for a file beneath that directory (eg, `foo/bar`).
*/
static bool iterator_pathlist_walk__contains(git_iterator *iter, const char *path)
static void iterator_set_ignore_case(git_iterator *iter, bool ignore_case)
{
size_t i;
char *p;
size_t p_len;
int cmp;
for (i = iter->pathlist_walk_idx; i < iter->pathlist.length; i++) {
p = iter->pathlist.contents[i];
p_len = strlen(p);
/* see if the pathlist entry is a prefix of this path */
cmp = iter->strncomp(p, path, p_len);
/* this pathlist entry sorts before the given path, try the next */
if (!p_len || cmp < 0)
iter->pathlist_walk_idx++;
/* this pathlist sorts after the given path, no match. */
else if (cmp > 0)
return false;
/* match! an exact match (`foo` vs `foo`), the path is a child of an
* explicit directory in the pathlist (`foo/` vs `foo/bar`) or the path
* is a child of an entry in the pathlist (`foo` vs `foo/bar`)
*/
else if (path[p_len] == '\0' || p[p_len - 1] == '/' || path[p_len] == '/')
return true;
/* only advance the start index for future callers if we know that we
* will not see a child of this path. eg, a pathlist entry `foo` is
* a prefix for `foo.txt` and `foo/bar`. don't advance the start
* pathlist index when we see `foo.txt` or we would miss a subsequent
* inspection of `foo/bar`. only advance when there are no more
* potential children.
*/
else if (path[p_len] > '/')
iter->pathlist_walk_idx++;
}
if (ignore_case)
iter->flags |= GIT_ITERATOR_IGNORE_CASE;
else
iter->flags &= ~GIT_ITERATOR_IGNORE_CASE;
return false;
}
iter->strcomp = ignore_case ? git__strcasecmp : git__strcmp;
iter->strncomp = ignore_case ? git__strncasecmp : git__strncmp;
iter->prefixcomp = ignore_case ? git__prefixcmp_icase : git__prefixcmp;
iter->entry_srch = ignore_case ? git_index_entry_srch : git_index_entry_isrch;
static void iterator_pathlist__update_ignore_case(git_iterator *iter)
{
git_vector_set_cmp(&iter->pathlist, (git_vector_cmp)iter->strcomp);
git_vector_sort(&iter->pathlist);
iter->pathlist_walk_idx = 0;
}
static int iterator__reset_range(
git_iterator *iter, const char *start, const char *end)
{
if (iter->start)
git__free(iter->start);
if (start) {
iter->start = git__strdup(start);
GITERR_CHECK_ALLOC(iter->start);
}
if (iter->end)
git__free(iter->end);
if (end) {
iter->end = git__strdup(end);
GITERR_CHECK_ALLOC(iter->end);
}
iter->flags &= ~GIT_ITERATOR_FIRST_ACCESS;
return 0;
}
int git_iterator_set_ignore_case(git_iterator *iter, bool ignore_case)
{
if (ignore_case) {
iter->flags = (iter->flags | GIT_ITERATOR_IGNORE_CASE);
iter->strcomp = git__strcasecmp;
iter->strncomp = git__strncasecmp;
iter->prefixcomp = git__prefixcmp_icase;
iter->entry_srch = git_index_entry_isrch;
} else {
iter->flags = (iter->flags & ~GIT_ITERATOR_IGNORE_CASE);
iter->strcomp = git__strcmp;
iter->strncomp = git__strncmp;
iter->prefixcomp = git__prefixcmp;
iter->entry_srch = git_index_entry_srch;
}
iterator_pathlist__update_ignore_case(iter);
return 0;
}
static int iterator__update_ignore_case(
git_iterator *iter,
git_iterator_flag_t flags)
{
bool ignore_case;
int error;
if ((flags & GIT_ITERATOR_IGNORE_CASE) != 0)
ignore_case = true;
else if ((flags & GIT_ITERATOR_DONT_IGNORE_CASE) != 0)
ignore_case = false;
else {
git_index *index;
if ((error = git_repository_index__weakptr(&index, iter->repo)) < 0)
return error;
ignore_case = (index->ignore_case == 1);
}
return git_iterator_set_ignore_case(iter, ignore_case);
}
GIT_INLINE(void) iterator__clear_entry(const git_index_entry **entry)
{
if (entry) *entry = NULL;
}
static int iterator_range_init(
git_iterator *iter, const char *start, const char *end)
{
......@@ -315,7 +81,7 @@ static void iterator_range_free(git_iterator *iter)
}
}
static int iterator_range_reset(
static int iterator_reset_range(
git_iterator *iter, const char *start, const char *end)
{
iterator_range_free(iter);
......@@ -326,8 +92,7 @@ static int iterator_pathlist_init(git_iterator *iter, git_strarray *pathlist)
{
size_t i;
if (git_vector_init(&iter->pathlist, pathlist->count,
(git_vector_cmp)iter->strcomp) < 0)
if (git_vector_init(&iter->pathlist, pathlist->count, NULL) < 0)
return -1;
for (i = 0; i < pathlist->count; i++) {
......@@ -338,7 +103,6 @@ static int iterator_pathlist_init(git_iterator *iter, git_strarray *pathlist)
return -1;
}
git_vector_sort(&iter->pathlist);
return 0;
}
......@@ -392,15 +156,11 @@ static int iterator_init_common(
if ((iter->flags & GIT_ITERATOR_DONT_AUTOEXPAND))
iter->flags |= GIT_ITERATOR_INCLUDE_TREES;
iter->strcomp = ignore_case ? git__strcasecmp : git__strcmp;
iter->strncomp = ignore_case ? git__strncasecmp : git__strncmp;
iter->prefixcomp = ignore_case ? git__prefixcmp_icase : git__prefixcmp;
iter->entry_srch = ignore_case ? git_index_entry_srch : git_index_entry_isrch;
if ((error = iterator_range_init(iter, options->start, options->end)) < 0 ||
(error = iterator_pathlist_init(iter, &options->pathlist)) < 0)
return error;
iterator_set_ignore_case(iter, ignore_case);
return 0;
}
......@@ -460,6 +220,8 @@ static bool iterator_pathlist_next_is(git_iterator *iter, const char *path)
if (iter->pathlist.length == 0)
return true;
git_vector_sort(&iter->pathlist);
path_len = strlen(path);
/* for comparison, drop the trailing slash on the current '/' */
......@@ -515,7 +277,7 @@ static bool iterator_pathlist_next_is(git_iterator *iter, const char *path)
}
typedef enum {
ITERATOR_PATHLIST_NOT_FOUND = 0,
ITERATOR_PATHLIST_NONE = 0,
ITERATOR_PATHLIST_IS_FILE = 1,
ITERATOR_PATHLIST_IS_DIR = 2,
ITERATOR_PATHLIST_IS_PARENT = 3,
......@@ -529,6 +291,11 @@ static iterator_pathlist_search_t iterator_pathlist_search(
size_t idx;
int error;
if (iter->pathlist.length == 0)
return ITERATOR_PATHLIST_FULL;
git_vector_sort(&iter->pathlist);
error = git_vector_bsearch2(&idx, &iter->pathlist,
(git_vector_cmp)iter->strcomp, path);
......@@ -567,7 +334,7 @@ static iterator_pathlist_search_t iterator_pathlist_search(
idx++;
}
return ITERATOR_PATHLIST_NOT_FOUND;
return ITERATOR_PATHLIST_NONE;
}
/* Empty iterator */
......@@ -575,7 +342,10 @@ static iterator_pathlist_search_t iterator_pathlist_search(
static int empty_iterator_noop(const git_index_entry **e, git_iterator *i)
{
GIT_UNUSED(i);
iterator__clear_entry(e);
if (e)
*e = NULL;
return GIT_ITEROVER;
}
......@@ -584,10 +354,8 @@ static int empty_iterator_advance_over(
git_iterator_status_t *s,
git_iterator *i)
{
GIT_UNUSED(i);
*s = GIT_ITERATOR_STATUS_EMPTY;
iterator__clear_entry(e);
return GIT_ITEROVER;
return empty_iterator_noop(e, i);
}
static int empty_iterator_reset(git_iterator *i)
......@@ -596,19 +364,6 @@ static int empty_iterator_reset(git_iterator *i)
return 0;
}
static int empty_iterator_reset_range(
git_iterator *i, const char *s, const char *e)
{
GIT_UNUSED(i); GIT_UNUSED(s); GIT_UNUSED(e);
return 0;
}
static int empty_iterator_at_end(git_iterator *i)
{
GIT_UNUSED(i);
return 1;
}
static void empty_iterator_free(git_iterator *i)
{
GIT_UNUSED(i);
......@@ -631,8 +386,6 @@ int git_iterator_for_nothing(
empty_iterator_noop,
empty_iterator_advance_over,
empty_iterator_reset,
empty_iterator_reset_range,
empty_iterator_at_end,
empty_iterator_free
};
......@@ -1135,22 +888,6 @@ static int tree_iterator_reset(git_iterator *i)
return tree_iterator_init(iter);
}
static int tree_iterator_reset_range(
git_iterator *i, const char *start, const char *end)
{
if (iterator_range_reset(i, start, end) < 0)
return -1;
return tree_iterator_reset(i);
}
static int tree_iterator_at_end(git_iterator *i)
{
tree_iterator *iter = (tree_iterator *)i;
return (iter->frames.size == 0);
}
static void tree_iterator_free(git_iterator *i)
{
tree_iterator *iter = (tree_iterator *)i;
......@@ -1175,8 +912,6 @@ int git_iterator_for_tree(
tree_iterator_advance_into,
tree_iterator_advance_over,
tree_iterator_reset,
tree_iterator_reset_range,
tree_iterator_at_end,
tree_iterator_free
};
......@@ -1326,7 +1061,7 @@ static int filesystem_iterator_entry_cmp_icase(const void *_a, const void *_b)
* We consider it a submodule if the path is listed as a submodule in
* either the tree or the index.
*/
static int is_submodule(
static int filesystem_iterator_is_submodule(
bool *out, filesystem_iterator *iter, const char *path, size_t path_len)
{
bool is_submodule = false;
......@@ -1368,18 +1103,6 @@ static int is_submodule(
return 0;
}
GIT_INLINE(git_dir_flag) filesystem_iterator_dir_flag(git_index_entry *entry)
{
#if defined(GIT_WIN32) && !defined(__MINGW32__)
return (entry && entry->mode) ?
(S_ISDIR(entry->mode) ? GIT_DIR_FLAG_TRUE : GIT_DIR_FLAG_FALSE) :
GIT_DIR_FLAG_UNKNOWN;
#else
GIT_UNUSED(entry);
return GIT_DIR_FLAG_UNKNOWN;
#endif
}
static void filesystem_iterator_frame_push_ignores(
filesystem_iterator *iter,
filesystem_iterator_entry *frame_entry,
......@@ -1433,7 +1156,7 @@ GIT_INLINE(bool) filesystem_iterator_examine_path(
iterator_pathlist_search_t match = ITERATOR_PATHLIST_FULL;
*is_dir_out = false;
*match_out = ITERATOR_PATHLIST_NOT_FOUND;
*match_out = ITERATOR_PATHLIST_NONE;
if (iter->base.start_len) {
int cmp = iter->base.strncomp(path, iter->base.start, path_len);
......@@ -1471,7 +1194,7 @@ GIT_INLINE(bool) filesystem_iterator_examine_path(
else
match = iterator_pathlist_search(&iter->base, path, path_len);
if (match == ITERATOR_PATHLIST_NOT_FOUND)
if (match == ITERATOR_PATHLIST_NONE)
return false;
/* Ensure that the pathlist entry lines up with what we expected */
......@@ -1649,7 +1372,8 @@ static int filesystem_iterator_frame_push(
if (S_ISDIR(statbuf.st_mode)) {
bool submodule = false;
if ((error = is_submodule(&submodule, iter, path, path_len)) < 0)
if ((error = filesystem_iterator_is_submodule(&submodule,
iter, path, path_len)) < 0)
goto done;
if (submodule)
......@@ -2037,22 +1761,6 @@ static int filesystem_iterator_reset(git_iterator *i)
return filesystem_iterator_init(iter);
}
static int filesystem_iterator_reset_range(
git_iterator *i, const char *start, const char *end)
{
if (iterator_range_reset(i, start, end) < 0)
return -1;
return filesystem_iterator_reset(i);
}
static int filesystem_iterator_at_end(git_iterator *i)
{
filesystem_iterator *iter = (filesystem_iterator *)i;
return (iter->frames.size == 0);
}
static void filesystem_iterator_free(git_iterator *i)
{
filesystem_iterator *iter = (filesystem_iterator *)i;
......@@ -2078,8 +1786,6 @@ static int iterator_for_filesystem(
filesystem_iterator_advance_into,
filesystem_iterator_advance_over,
filesystem_iterator_reset,
filesystem_iterator_reset_range,
filesystem_iterator_at_end,
filesystem_iterator_free
};
......@@ -2336,7 +2042,9 @@ static int index_iterator_advance_into(
index_iterator *iter = (index_iterator *)i;
if (! S_ISDIR(iter->tree_entry.mode)) {
if (out)
*out = NULL;
return 0;
}
......@@ -2384,22 +2092,6 @@ static int index_iterator_reset(git_iterator *i)
return index_iterator_init(iter);
}
static int index_iterator_reset_range(
git_iterator *i, const char *start, const char *end)
{
if (iterator_range_reset(i, start, end) < 0)
return -1;
return index_iterator_reset(i);
}
static int index_iterator_at_end(git_iterator *i)
{
index_iterator *iter = (index_iterator *)i;
return (iter->entry == NULL);
}
static void index_iterator_free(git_iterator *i)
{
index_iterator *iter = (index_iterator *)i;
......@@ -2422,8 +2114,6 @@ int git_iterator_for_index(
index_iterator_advance_into,
index_iterator_advance_over,
index_iterator_reset,
index_iterator_reset_range,
index_iterator_at_end,
index_iterator_free
};
......@@ -2443,7 +2133,6 @@ int git_iterator_for_index(
(error = index_iterator_init(iter)) < 0)
goto on_error;
/* TODO: make sure this keeps the entries sort if they were already */
git_vector_set_cmp(&iter->entries, iterator__ignore_case(&iter->base) ?
git_index_entry_icmp : git_index_entry_cmp);
git_vector_sort(&iter->entries);
......@@ -2459,6 +2148,20 @@ on_error:
/* Iterator API */
int git_iterator_reset_range(
git_iterator *i, const char *start, const char *end)
{
if (iterator_reset_range(i, start, end) < 0)
return -1;
return i->cb->reset(i);
}
void git_iterator_set_ignore_case(git_iterator *i, bool ignore_case)
{
assert(!iterator__has_been_accessed(i));
iterator_set_ignore_case(i, ignore_case);
}
void git_iterator_free(git_iterator *iter)
{
......
src/iterator.h
......@@ -69,8 +69,6 @@ typedef struct {
int (*advance_over)(
const git_index_entry **, git_iterator_status_t *, git_iterator *);
int (*reset)(git_iterator *);
int (*reset_range)(git_iterator *, const char *start, const char *end);
int (*at_end)(git_iterator *);
void (*free)(git_iterator *);
} git_iterator_callbacks;
......@@ -232,21 +230,8 @@ GIT_INLINE(int) git_iterator_reset(git_iterator *iter)
* Go back to the start of the iteration after updating the `start` and
* `end` pathname boundaries of the iteration.
*/
GIT_INLINE(int) git_iterator_reset_range(
git_iterator *iter, const char *start, const char *end)
{
return iter->cb->reset_range(iter, start, end);
}
/**
* Check if the iterator is at the end
*
* @return 0 if not at end, >0 if at end
*/
GIT_INLINE(int) git_iterator_at_end(git_iterator *iter)
{
return iter->cb->at_end(iter);
}
extern int git_iterator_reset_range(
git_iterator *iter, const char *start, const char *end);
GIT_INLINE(git_iterator_type_t) git_iterator_type(git_iterator *iter)
{
......@@ -273,7 +258,8 @@ GIT_INLINE(bool) git_iterator_ignore_case(git_iterator *iter)
return ((iter->flags & GIT_ITERATOR_IGNORE_CASE) != 0);
}
extern int git_iterator_set_ignore_case(git_iterator *iter, bool ignore_case);
extern void git_iterator_set_ignore_case(
git_iterator *iter, bool ignore_case);
extern int git_iterator_current_tree_entry(
const git_tree_entry **entry_out, git_iterator *iter);
......
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