kmx git

Commit	Date	Message
76182e84	2019-07-24T18:04:38	config_entries: fix possible segfault when duplicating entries When duplicating a configuration entry, we allocate a new entry but do not verify that we get a valid pointer back. As we're dereferencing the pointer afterwards, we might thus run into a segfault in out-of-memory situations. Extract a new function `git_config_entries_dup_entry` that handles the complete entry duplication. Fix the error by using `GIT_ERROR_CHECK_ALLOC`.
03555830	2019-01-23T10:44:33	strmap: introduce high-level setter for key/value pairs Currently, one would use the function `git_strmap_insert` to insert key/value pairs into a map. This function has historically been a macro, which is why its syntax is kind of weird: instead of returning an error code directly, it instead has to be passed a pointer to where the return value shall be stored. This does not match libgit2's common idiom of directly returning error codes. Introduce a new function `git_strmap_set`, which takes as parameters the map, key and value and directly returns an error code. Convert all callers of `git_strmap_insert` to make use of it.
ef507bc7	2019-01-23T10:44:02	strmap: introduce `git_strmap_get` and use it throughout the tree The current way of looking up an entry from a map is tightly coupled with the map implementation, as one first has to look up the index of the key and then retrieve the associated value by using the index. As a caller, you usually do not care about any indices at all, though, so this is more complicated than really necessary. Furthermore, it invites for errors to happen if the correct error checking sequence is not being followed. Introduce a new high-level function `git_strmap_get` that takes a map and a key and returns a pointer to the associated value if such a key exists. Otherwise, a `NULL` pointer is returned. Adjust all callers that can trivially be converted.
351eeff3	2019-01-23T10:42:46	maps: use uniform lifecycle management functions Currently, the lifecycle functions for maps (allocation, deallocation, resize) are not named in a uniform way and do not have a uniform function signature. Rename the functions to fix that, and stick to libgit2's naming scheme of saying `git_foo_new`. This results in the following new interface for allocation: - `int git_<t>map_new(git_<t>map *out)` to allocate a new map, returning an error code if we ran out of memory - `void git_<t>map_free(git_<t>map map)` to free a map - `void git_<t>map_clear(git<t>map *map)` to remove all entries from a map This commit also fixes all existing callers.
f673e232	2018-12-27T13:47:34	git_error: use new names in internal APIs and usage Move to the `git_error` name in the internal API for error-related functions.
852bc9f4	2018-11-23T19:26:24	khash: remove intricate knowledge of khash types Instead of using the `khiter_t`, `git_strmap_iter` and `khint_t` types, simply use `size_t` instead. This decouples code from the khash stuff and makes it possible to move the khash includes into the implementation files.
b78f4ab0	2018-08-16T12:22:03	config_entries: refactor entries iterator memory ownership Right now, the config file code requires us to pass in its backend to the config entry iterator. This is required with the current code, as the config file backend will first create a read-only snapshot which is then passed to the iterator just for that purpose. So after the iterator is getting free'd, the code needs to make sure that the snapshot gets free'd, as well. By now, though, we can easily refactor the code to be more efficient and remove the reverse dependency from iterator to backend. Instead of creating a read-only snapshot (which also requires us to re-parse the complete configuration file), we can simply duplicate the config entries and pass those to the iterator. Like that, the iterator only needs to make sure to free the duplicated config entries, which is trivial to do and clears up memory ownership by a lot.
d49b1365	2018-08-10T19:01:37	config_entries: internalize structure declarations Access to the config entries is now completely done via the modules function interface and no caller messes with the struct's internals. We can thus completely move the structure declarations into the implementation file so that nobody even has a chance to mess with the members.
123e5963	2018-08-10T18:59:59	config_entries: abstract away reference counting Instead of directly calling `git_atomic_inc` in users of the config entries store, provide a `git_config_entries_incref` function to further decouple the interfaces. Convert the refcount to a `git_refcount` structure while at it.
5a7e0b3c	2018-08-10T18:49:38	config_entries: abstract away iteration over entries The nice thing about our `git_config_iterator` interfaces is that nobody needs to know anything about the implementation details. All that is required is to obtain the iterator via any backend and then use it by executing generic functions. We can thus completely internalize all the implementation details of how to iterate over entries into the config entries store and simply create such an iterator in our config file backend when we want to iterate its entries. This further decouples the config file backend from the config entries store.
60ebc137	2018-08-10T14:53:09	config_entries: abstract away retrieval of config entries The code accessing config entries in the `git_config_entries` structure is still much too intimate with implementation details, directly accessing the maps and handling indices. Provide two new functions to get config entries from the internal map structure to decouple the interfaces and use them in the config file code. The function `git_config_entries_get` will simply look up the entry by name and, in the case of a multi-value, return the last occurrence of that entry. The second function, `git_config_entries_get_unique`, will only return an entry if it is unique and not included via another configuration file. This one is required to properly implement write operations for single entries, as we refuse to write to or delete a single entry if it is not clear which one was meant.
fb8a87da	2018-08-10T14:50:15	config_entries: rename functions and structure The previous commit simply moved all code that is required to handle config entries to a new module without yet adjusting any of the function and structure names to help readability. We now rename things accordingly to have a common "git_config_entries" entries instead of the old "diskfile_entries" one.
04f57d51	2018-08-10T13:33:02	config_entries: pull out implementation of entry store The configuration entry store that is used for configuration files needs to keep track of all entries in two different structures: - a singly linked list is being used to be able to iterate through configuration files in the order they have been found - a string map is being used to efficiently look up configuration entries by their key This store is thus something that may be used by other, future backends as well to abstract away implementation details and iteration over the entries. Pull out the necessary functions from "config_file.c" and moves them into their own "config_entries.c" module. For now, this is simply moving over code without any renames and/or refactorings to help reviewing.

76182e84

2019-07-24T18:04:38

config_entries: fix possible segfault when duplicating entries When duplicating a configuration entry, we allocate a new entry but do not verify that we get a valid pointer back. As we're dereferencing the pointer afterwards, we might thus run into a segfault in out-of-memory situations. Extract a new function `git_config_entries_dup_entry` that handles the complete entry duplication. Fix the error by using `GIT_ERROR_CHECK_ALLOC`.

03555830

2019-01-23T10:44:33

strmap: introduce high-level setter for key/value pairs Currently, one would use the function `git_strmap_insert` to insert key/value pairs into a map. This function has historically been a macro, which is why its syntax is kind of weird: instead of returning an error code directly, it instead has to be passed a pointer to where the return value shall be stored. This does not match libgit2's common idiom of directly returning error codes. Introduce a new function `git_strmap_set`, which takes as parameters the map, key and value and directly returns an error code. Convert all callers of `git_strmap_insert` to make use of it.

ef507bc7

2019-01-23T10:44:02

strmap: introduce `git_strmap_get` and use it throughout the tree The current way of looking up an entry from a map is tightly coupled with the map implementation, as one first has to look up the index of the key and then retrieve the associated value by using the index. As a caller, you usually do not care about any indices at all, though, so this is more complicated than really necessary. Furthermore, it invites for errors to happen if the correct error checking sequence is not being followed. Introduce a new high-level function `git_strmap_get` that takes a map and a key and returns a pointer to the associated value if such a key exists. Otherwise, a `NULL` pointer is returned. Adjust all callers that can trivially be converted.

351eeff3

2019-01-23T10:42:46

maps: use uniform lifecycle management functions Currently, the lifecycle functions for maps (allocation, deallocation, resize) are not named in a uniform way and do not have a uniform function signature. Rename the functions to fix that, and stick to libgit2's naming scheme of saying `git_foo_new`. This results in the following new interface for allocation: - `int git_<t>map_new(git_<t>map **out)` to allocate a new map, returning an error code if we ran out of memory - `void git_<t>map_free(git_<t>map *map)` to free a map - `void git_<t>map_clear(git<t>map *map)` to remove all entries from a map This commit also fixes all existing callers.

f673e232

2018-12-27T13:47:34

git_error: use new names in internal APIs and usage Move to the `git_error` name in the internal API for error-related functions.

852bc9f4

2018-11-23T19:26:24

khash: remove intricate knowledge of khash types Instead of using the `khiter_t`, `git_strmap_iter` and `khint_t` types, simply use `size_t` instead. This decouples code from the khash stuff and makes it possible to move the khash includes into the implementation files.

b78f4ab0

2018-08-16T12:22:03

config_entries: refactor entries iterator memory ownership Right now, the config file code requires us to pass in its backend to the config entry iterator. This is required with the current code, as the config file backend will first create a read-only snapshot which is then passed to the iterator just for that purpose. So after the iterator is getting free'd, the code needs to make sure that the snapshot gets free'd, as well. By now, though, we can easily refactor the code to be more efficient and remove the reverse dependency from iterator to backend. Instead of creating a read-only snapshot (which also requires us to re-parse the complete configuration file), we can simply duplicate the config entries and pass those to the iterator. Like that, the iterator only needs to make sure to free the duplicated config entries, which is trivial to do and clears up memory ownership by a lot.

d49b1365

2018-08-10T19:01:37

config_entries: internalize structure declarations Access to the config entries is now completely done via the modules function interface and no caller messes with the struct's internals. We can thus completely move the structure declarations into the implementation file so that nobody even has a chance to mess with the members.

123e5963

2018-08-10T18:59:59

config_entries: abstract away reference counting Instead of directly calling `git_atomic_inc` in users of the config entries store, provide a `git_config_entries_incref` function to further decouple the interfaces. Convert the refcount to a `git_refcount` structure while at it.

5a7e0b3c

2018-08-10T18:49:38

config_entries: abstract away iteration over entries The nice thing about our `git_config_iterator` interfaces is that nobody needs to know anything about the implementation details. All that is required is to obtain the iterator via any backend and then use it by executing generic functions. We can thus completely internalize all the implementation details of how to iterate over entries into the config entries store and simply create such an iterator in our config file backend when we want to iterate its entries. This further decouples the config file backend from the config entries store.

60ebc137

2018-08-10T14:53:09

config_entries: abstract away retrieval of config entries The code accessing config entries in the `git_config_entries` structure is still much too intimate with implementation details, directly accessing the maps and handling indices. Provide two new functions to get config entries from the internal map structure to decouple the interfaces and use them in the config file code. The function `git_config_entries_get` will simply look up the entry by name and, in the case of a multi-value, return the last occurrence of that entry. The second function, `git_config_entries_get_unique`, will only return an entry if it is unique and not included via another configuration file. This one is required to properly implement write operations for single entries, as we refuse to write to or delete a single entry if it is not clear which one was meant.

fb8a87da

2018-08-10T14:50:15

config_entries: rename functions and structure The previous commit simply moved all code that is required to handle config entries to a new module without yet adjusting any of the function and structure names to help readability. We now rename things accordingly to have a common "git_config_entries" entries instead of the old "diskfile_entries" one.

04f57d51

2018-08-10T13:33:02

config_entries: pull out implementation of entry store The configuration entry store that is used for configuration files needs to keep track of all entries in two different structures: - a singly linked list is being used to be able to iterate through configuration files in the order they have been found - a string map is being used to efficiently look up configuration entries by their key This store is thus something that may be used by other, future backends as well to abstract away implementation details and iteration over the entries. Pull out the necessary functions from "config_file.c" and moves them into their own "config_entries.c" module. For now, this is simply moving over code without any renames and/or refactorings to help reviewing.

thodg/libgit2/src/config_entries.c

src/config_entries.c

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