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/*

* Copyright (C) the libgit2 contributors. All rights reserved.

*

* This file is part of libgit2, distributed under the GNU GPL v2 with

* a Linking Exception. For full terms see the included COPYING file.

*/

#include "config_list.h"

#include "hashmap_str.h"

typedef struct config_entry_list {

struct config_entry_list *next;

struct config_entry_list *last;

git_config_list_entry *entry;

} config_entry_list;

typedef struct {

git_config_list_entry *entry;

bool multivar;

} config_entry_map_head;

typedef struct config_list_iterator {

git_config_iterator parent;

git_config_list *list;

config_entry_list *head;

} config_list_iterator;

GIT_HASHMAP_STR_SETUP(git_config_list_pathmap, char *);

GIT_HASHMAP_STR_SETUP(git_config_list_headmap, config_entry_map_head *);

struct git_config_list {

git_refcount rc;

/* Interned strings - paths to config files or backend types */

git_config_list_pathmap strings;

/* Config entries */

git_config_list_headmap map;

config_entry_list *entries;

};

int git_config_list_new(git_config_list **out)

{

git_config_list *config_list;

config_list = git__calloc(1, sizeof(git_config_list));

GIT_ERROR_CHECK_ALLOC(config_list);

GIT_REFCOUNT_INC(config_list);

*out = config_list;

return 0;

}

int git_config_list_dup_entry(git_config_list *config_list, const git_config_entry *entry)

{

git_config_list_entry *duplicated;

int error;

duplicated = git__calloc(1, sizeof(git_config_list_entry));

GIT_ERROR_CHECK_ALLOC(duplicated);

duplicated->base.entry.name = git__strdup(entry->name);

GIT_ERROR_CHECK_ALLOC(duplicated->base.entry.name);

if (entry->value) {

duplicated->base.entry.value = git__strdup(entry->value);

GIT_ERROR_CHECK_ALLOC(duplicated->base.entry.value);

}

duplicated->base.entry.backend_type = git_config_list_add_string(config_list, entry->backend_type);

GIT_ERROR_CHECK_ALLOC(duplicated->base.entry.backend_type);

if (entry->origin_path) {

duplicated->base.entry.origin_path = git_config_list_add_string(config_list, entry->origin_path);

GIT_ERROR_CHECK_ALLOC(duplicated->base.entry.origin_path);

}

duplicated->base.entry.level = entry->level;

duplicated->base.entry.include_depth = entry->include_depth;

duplicated->base.free = git_config_list_entry_free;

duplicated->config_list = config_list;

if ((error = git_config_list_append(config_list, duplicated)) < 0)

goto out;

out:

if (error && duplicated) {

git__free((char *) duplicated->base.entry.name);

git__free((char *) duplicated->base.entry.value);

git__free(duplicated);

}

return error;

}

int git_config_list_dup(git_config_list **out, git_config_list *config_list)

{

git_config_list *result = NULL;

config_entry_list *head;

int error;

if ((error = git_config_list_new(&result)) < 0)

goto out;

for (head = config_list->entries; head; head = head->next)

if ((git_config_list_dup_entry(result, &head->entry->base.entry)) < 0)

goto out;

*out = result;

result = NULL;

out:

git_config_list_free(result);

return error;

}

void git_config_list_incref(git_config_list *config_list)

{

GIT_REFCOUNT_INC(config_list);

}

static void config_list_free(git_config_list *config_list)

{

config_entry_list *entry_list = NULL, *next;

config_entry_map_head *head;

char *str;

git_hashmap_iter_t iter = GIT_HASHMAP_ITER_INIT;

while (git_config_list_pathmap_iterate(&iter, NULL, &str, &config_list->strings) == 0)

git__free(str);

git_config_list_pathmap_dispose(&config_list->strings);

iter = GIT_HASHMAP_ITER_INIT;

while (git_config_list_headmap_iterate(&iter, NULL, &head, &config_list->map) == 0) {

git__free((char *) head->entry->base.entry.name);

git__free(head);

}

git_config_list_headmap_dispose(&config_list->map);

entry_list = config_list->entries;

while (entry_list != NULL) {

next = entry_list->next;

git__free((char *) entry_list->entry->base.entry.value);

git__free(entry_list->entry);

git__free(entry_list);

entry_list = next;

}

git__free(config_list);

}

void git_config_list_free(git_config_list *config_list)

{

if (config_list)

GIT_REFCOUNT_DEC(config_list, config_list_free);

}

int git_config_list_append(git_config_list *config_list, git_config_list_entry *entry)

{

config_entry_list *list_head;

config_entry_map_head *map_head;

if (git_config_list_headmap_get(&map_head, &config_list->map, entry->base.entry.name) == 0) {

map_head->multivar = true;

/*

* This is a micro-optimization for configuration files

* with a lot of same keys. As for multivars the entry's

* key will be the same for all list, we can just free

* all except the first entry's name and just re-use it.

*/

git__free((char *) entry->base.entry.name);

entry->base.entry.name = map_head->entry->base.entry.name;

} else {

map_head = git__calloc(1, sizeof(*map_head));

if ((git_config_list_headmap_put(&config_list->map, entry->base.entry.name, map_head)) < 0)

return -1;

}

map_head->entry = entry;

list_head = git__calloc(1, sizeof(config_entry_list));

GIT_ERROR_CHECK_ALLOC(list_head);

list_head->entry = entry;

if (config_list->entries)

config_list->entries->last->next = list_head;

else

config_list->entries = list_head;

config_list->entries->last = list_head;

return 0;

}

int git_config_list_get(git_config_list_entry **out, git_config_list *config_list, const char *key)

{

config_entry_map_head *entry;

if (git_config_list_headmap_get(&entry, &config_list->map, key) != 0)

return GIT_ENOTFOUND;

*out = entry->entry;

return 0;

}

int git_config_list_get_unique(git_config_list_entry **out, git_config_list *config_list, const char *key)

{

config_entry_map_head *entry;

if (git_config_list_headmap_get(&entry, &config_list->map, key) != 0)

return GIT_ENOTFOUND;

if (entry->multivar) {

git_error_set(GIT_ERROR_CONFIG, "entry is not unique due to being a multivar");

return -1;

}

if (entry->entry->base.entry.include_depth) {

git_error_set(GIT_ERROR_CONFIG, "entry is not unique due to being included");

return -1;

}

*out = entry->entry;

return 0;

}

static void config_iterator_free(git_config_iterator *iter)

{

config_list_iterator *it = (config_list_iterator *) iter;

git_config_list_free(it->list);

git__free(it);

}

static int config_iterator_next(

git_config_backend_entry **entry,

git_config_iterator *iter)

{

config_list_iterator *it = (config_list_iterator *) iter;

if (!it->head)

return GIT_ITEROVER;

*entry = &it->head->entry->base;

it->head = it->head->next;

return 0;

}

int git_config_list_iterator_new(git_config_iterator **out, git_config_list *config_list)

{

config_list_iterator *it;

it = git__calloc(1, sizeof(config_list_iterator));

GIT_ERROR_CHECK_ALLOC(it);

it->parent.next = config_iterator_next;

it->parent.free = config_iterator_free;

it->head = config_list->entries;

it->list = config_list;

git_config_list_incref(config_list);

*out = &it->parent;

return 0;

}

/* release the map containing the entry as an equivalent to freeing it */

void git_config_list_entry_free(git_config_backend_entry *e)

{

git_config_list_entry *entry = (git_config_list_entry *)e;

git_config_list_free(entry->config_list);

}

const char *git_config_list_add_string(

git_config_list *config_list,

const char *str)

{

char *s;

if (git_config_list_pathmap_get(&s, &config_list->strings, str) == 0)

return s;

if ((s = git__strdup(str)) == NULL ||

git_config_list_pathmap_put(&config_list->strings, s, s) < 0)

return NULL;

return s;

}