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RetroArch/core_updater_list.c
LibretroAdmin 575e331fd1 If we already know the length of the string, use strldup instead. 
Avoids the internal strlen call inside strdup, and strdup is a deprecated
function starting from MSVC2005 anyways.

NOTE: Do NOT pass STRLEN_CONST as n parameter to strldup, it needs to
be at least +1 character higher than the strlen return value of the same
string
2022-08-25 16:31:54 +02:00

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/* Copyright (C) 2010-2019 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (core_updater_list.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <file/file_path.h>
#include <string/stdstring.h>
#include <lists/string_list.h>
#include <net/net_http.h>
#include <array/rbuf.h>
#include <retro_miscellaneous.h>
#include "file_path_special.h"
#include "core_info.h"
#include "core_updater_list.h"
/* Holds all entries in a core updater list */
struct core_updater_list
{
core_updater_list_entry_t *entries;
enum core_updater_list_type type;
};
/* Cached ('global') core updater list */
static core_updater_list_t *core_list_cached = NULL;
/**************************************/
/* Initialisation / De-Initialisation */
/**************************************/
/* Frees contents of specified core updater
* list entry */
static void core_updater_list_free_entry(core_updater_list_entry_t *entry)
{
if (!entry)
return;
if (entry->remote_filename)
{
free(entry->remote_filename);
entry->remote_filename = NULL;
}
if (entry->remote_core_path)
{
free(entry->remote_core_path);
entry->remote_core_path = NULL;
}
if (entry->local_core_path)
{
free(entry->local_core_path);
entry->local_core_path = NULL;
}
if (entry->local_info_path)
{
free(entry->local_info_path);
entry->local_info_path = NULL;
}
if (entry->display_name)
{
free(entry->display_name);
entry->display_name = NULL;
}
if (entry->description)
{
free(entry->description);
entry->description = NULL;
}
if (entry->licenses_list)
{
string_list_free(entry->licenses_list);
entry->licenses_list = NULL;
}
}
/* Creates a new, empty core updater list.
* Returns a handle to a new core_updater_list_t object
* on success, otherwise returns NULL. */
core_updater_list_t *core_updater_list_init(void)
{
/* Create core updater list */
core_updater_list_t *core_list = (core_updater_list_t*)
malloc(sizeof(*core_list));
if (!core_list)
return NULL;
/* Initialise members */
core_list->entries = NULL;
core_list->type = CORE_UPDATER_LIST_TYPE_UNKNOWN;
return core_list;
}
/* Resets (removes all entries of) specified core
* updater list */
void core_updater_list_reset(core_updater_list_t *core_list)
{
if (!core_list)
return;
if (core_list->entries)
{
size_t i;
for (i = 0; i < RBUF_LEN(core_list->entries); i++)
core_updater_list_free_entry(&core_list->entries[i]);
RBUF_FREE(core_list->entries);
}
core_list->type = CORE_UPDATER_LIST_TYPE_UNKNOWN;
}
/* Frees specified core updater list */
void core_updater_list_free(core_updater_list_t *core_list)
{
if (!core_list)
return;
core_updater_list_reset(core_list);
free(core_list);
}
/***************/
/* Cached List */
/***************/
/* Creates a new, empty cached core updater list
* (i.e. 'global' list).
* Returns false in the event of an error. */
bool core_updater_list_init_cached(void)
{
/* Free any existing cached core updater list */
if (core_list_cached)
{
core_updater_list_free(core_list_cached);
core_list_cached = NULL;
}
core_list_cached = core_updater_list_init();
if (!core_list_cached)
return false;
return true;
}
/* Fetches cached core updater list */
core_updater_list_t *core_updater_list_get_cached(void)
{
if (core_list_cached)
return core_list_cached;
return NULL;
}
/* Frees cached core updater list */
void core_updater_list_free_cached(void)
{
core_updater_list_free(core_list_cached);
core_list_cached = NULL;
}
/***********/
/* Getters */
/***********/
/* Returns number of entries in core updater list */
size_t core_updater_list_size(core_updater_list_t *core_list)
{
if (!core_list)
return 0;
return RBUF_LEN(core_list->entries);
}
/* Returns 'type' (core delivery method) of
* specified core updater list */
enum core_updater_list_type core_updater_list_get_type(
core_updater_list_t *core_list)
{
if (!core_list)
return CORE_UPDATER_LIST_TYPE_UNKNOWN;
return core_list->type;
}
/* Fetches core updater list entry corresponding
* to the specified entry index.
* Returns false if index is invalid. */
bool core_updater_list_get_index(
core_updater_list_t *core_list,
size_t idx,
const core_updater_list_entry_t **entry)
{
if (!core_list || !entry)
return false;
if (idx >= RBUF_LEN(core_list->entries))
return false;
*entry = &core_list->entries[idx];
return true;
}
/* Fetches core updater list entry corresponding
* to the specified remote core filename.
* Returns false if core is not found. */
bool core_updater_list_get_filename(
core_updater_list_t *core_list,
const char *remote_filename,
const core_updater_list_entry_t **entry)
{
size_t num_entries;
size_t i;
if (!core_list || !entry || string_is_empty(remote_filename))
return false;
num_entries = RBUF_LEN(core_list->entries);
if (num_entries < 1)
return false;
/* Search for specified filename */
for (i = 0; i < num_entries; i++)
{
core_updater_list_entry_t *current_entry = &core_list->entries[i];
if (string_is_empty(current_entry->remote_filename))
continue;
if (string_is_equal(remote_filename, current_entry->remote_filename))
{
*entry = current_entry;
return true;
}
}
return false;
}
/* Fetches core updater list entry corresponding
* to the specified core.
* Returns false if core is not found. */
bool core_updater_list_get_core(
core_updater_list_t *core_list,
const char *local_core_path,
const core_updater_list_entry_t **entry)
{
bool resolve_symlinks;
size_t num_entries;
size_t i;
char real_core_path[PATH_MAX_LENGTH];
if (!core_list || !entry || string_is_empty(local_core_path))
return false;
if ((num_entries = RBUF_LEN(core_list->entries)) < 1)
return false;
/* Resolve absolute pathname of local_core_path */
strlcpy(real_core_path, local_core_path, sizeof(real_core_path));
/* Can't resolve symlinks when dealing with cores
* installed via play feature delivery, because the
* source files have non-standard file names (which
* will not be recognised by regular core handling
* routines) */
resolve_symlinks = (core_list->type != CORE_UPDATER_LIST_TYPE_PFD);
path_resolve_realpath(real_core_path, sizeof(real_core_path),
resolve_symlinks);
if (string_is_empty(real_core_path))
return false;
/* Search for specified core */
for (i = 0; i < num_entries; i++)
{
core_updater_list_entry_t *current_entry = &core_list->entries[i];
if (string_is_empty(current_entry->local_core_path))
continue;
#ifdef _WIN32
/* Handle case-insensitive operating systems*/
if (string_is_equal_noncase(real_core_path, current_entry->local_core_path))
{
#else
if (string_is_equal(real_core_path, current_entry->local_core_path))
{
#endif
*entry = current_entry;
return true;
}
}
return false;
}
/***********/
/* Setters */
/***********/
/* Parses date string and adds contents to
* specified core updater list entry */
static bool core_updater_list_set_date(
core_updater_list_entry_t *entry, const char *date_str)
{
struct string_list date_list = {0};
if (!entry || string_is_empty(date_str))
goto error;
/* Split date string into component values */
string_list_initialize(&date_list);
if (!string_split_noalloc(&date_list, date_str, "-"))
goto error;
/* Date string must have 3 values:
* [year] [month] [day] */
if (date_list.size < 3)
goto error;
/* Convert date string values */
entry->date.year = string_to_unsigned(date_list.elems[0].data);
entry->date.month = string_to_unsigned(date_list.elems[1].data);
entry->date.day = string_to_unsigned(date_list.elems[2].data);
/* Clean up */
string_list_deinitialize(&date_list);
return true;
error:
string_list_deinitialize(&date_list);
return false;
}
/* Parses crc string and adds value to
* specified core updater list entry */
static bool core_updater_list_set_crc(
core_updater_list_entry_t *entry, const char *crc_str)
{
uint32_t crc;
if (!entry || string_is_empty(crc_str))
return false;
if ((crc = (uint32_t)string_hex_to_unsigned(crc_str)) == 0)
return false;
entry->crc = crc;
return true;
}
/* Parses core filename string and adds all
* associated paths to the specified core
* updater list entry */
static bool core_updater_list_set_paths(
core_updater_list_entry_t *entry,
const char *path_dir_libretro,
const char *path_libretro_info,
const char *network_buildbot_url,
const char *filename_str,
enum core_updater_list_type list_type)
{
char *last_underscore = NULL;
char *tmp_url = NULL;
bool is_archive = true;
/* Can't resolve symlinks when dealing with cores
* installed via play feature delivery, because the
* source files have non-standard file names (which
* will not be recognised by regular core handling
* routines) */
char remote_core_path[PATH_MAX_LENGTH];
char local_core_path[PATH_MAX_LENGTH];
char local_info_path[PATH_MAX_LENGTH];
bool resolve_symlinks = (list_type != CORE_UPDATER_LIST_TYPE_PFD);
if ( !entry
|| string_is_empty(filename_str)
|| string_is_empty(path_dir_libretro)
|| string_is_empty(path_libretro_info))
return false;
/* Only buildbot cores require the buildbot URL */
if ((list_type == CORE_UPDATER_LIST_TYPE_BUILDBOT) &&
string_is_empty(network_buildbot_url))
return false;
/* Check whether remote file is an archive */
is_archive = path_is_compressed_file(filename_str);
/* remote_filename */
if (entry->remote_filename)
{
free(entry->remote_filename);
entry->remote_filename = NULL;
}
entry->remote_filename = strdup(filename_str);
/* remote_core_path
* > Leave blank if this is not a buildbot core */
if (list_type == CORE_UPDATER_LIST_TYPE_BUILDBOT)
{
fill_pathname_join_special(
remote_core_path,
network_buildbot_url,
filename_str,
sizeof(remote_core_path));
/* > Apply proper URL encoding (messy...) */
tmp_url = strdup(remote_core_path);
remote_core_path[0] = '\0';
net_http_urlencode_full(
remote_core_path, tmp_url, sizeof(remote_core_path));
if (tmp_url)
free(tmp_url);
}
if (entry->remote_core_path)
{
free(entry->remote_core_path);
entry->remote_core_path = NULL;
}
entry->remote_core_path = strdup(remote_core_path);
fill_pathname_join_special(
local_core_path,
path_dir_libretro,
filename_str,
sizeof(local_core_path));
if (is_archive)
path_remove_extension(local_core_path);
path_resolve_realpath(local_core_path, sizeof(local_core_path),
resolve_symlinks);
if (entry->local_core_path)
{
free(entry->local_core_path);
entry->local_core_path = NULL;
}
entry->local_core_path = strdup(local_core_path);
fill_pathname_join_special(
local_info_path,
path_libretro_info,
filename_str,
sizeof(local_info_path));
path_remove_extension(local_info_path);
if (is_archive)
path_remove_extension(local_info_path);
/* > Remove any non-standard core filename
* additions (i.e. info files end with
* '_libretro' but core files may have
* a platform specific addendum,
* e.g. '_android')*/
last_underscore = (char*)strrchr(local_info_path, '_');
if (!string_is_empty(last_underscore))
if (!string_is_equal(last_underscore, "_libretro"))
*last_underscore = '\0';
/* > Add proper file extension */
strlcat(
local_info_path,
FILE_PATH_CORE_INFO_EXTENSION,
sizeof(local_info_path));
if (entry->local_info_path)
{
free(entry->local_info_path);
entry->local_info_path = NULL;
}
entry->local_info_path = strdup(local_info_path);
return true;
}
/* Reads info file associated with core and
* adds relevant information to updater list
* entry */
static bool core_updater_list_set_core_info(
core_updater_list_entry_t *entry,
const char *local_info_path,
const char *filename_str)
{
core_updater_info_t *core_info = NULL;
if ( !entry
|| string_is_empty(local_info_path)
|| string_is_empty(filename_str))
return false;
/* Clear any existing core info */
if (entry->display_name)
{
free(entry->display_name);
entry->display_name = NULL;
}
if (entry->description)
{
free(entry->description);
entry->description = NULL;
}
if (entry->licenses_list)
{
/* Note: We can safely leave this as NULL if
* the core info file is invalid */
string_list_free(entry->licenses_list);
entry->licenses_list = NULL;
}
entry->is_experimental = false;
/* Read core info file
* > Note: It's a bit rubbish that we have to
* read the actual core info files here...
* Would be better to cache this globally
* (at present, we only cache info for
* *installed* cores...) */
if ((core_info = core_info_get_core_updater_info(local_info_path)))
{
/* display_name + is_experimental */
if (!string_is_empty(core_info->display_name))
{
entry->display_name = strdup(core_info->display_name);
entry->is_experimental = core_info->is_experimental;
}
else
{
/* If display name is blank, use core filename and
* assume core is experimental (i.e. all 'fit for consumption'
* cores must have a valid/complete core info file) */
entry->display_name = strdup(filename_str);
entry->is_experimental = true;
}
/* description */
if (!string_is_empty(core_info->description))
entry->description = strdup(core_info->description);
else
entry->description = strldup("", sizeof(""));
/* licenses_list */
if (!string_is_empty(core_info->licenses))
entry->licenses_list = string_split(core_info->licenses, "|");
/* Clean up */
core_info_free_core_updater_info(core_info);
}
else
{
/* If info file is missing, use core filename and
* assume core is experimental (i.e. all 'fit for consumption'
* cores must have a valid/complete core info file) */
entry->display_name = strdup(filename_str);
entry->is_experimental = true;
entry->description = strldup("", sizeof(""));
}
return true;
}
/* Adds entry to the end of the specified core
* updater list
* NOTE: Entry string values are passed by
* reference - *do not free the entry passed
* to this function* */
static bool core_updater_list_push_entry(
core_updater_list_t *core_list, core_updater_list_entry_t *entry)
{
core_updater_list_entry_t *list_entry = NULL;
size_t num_entries;
if (!core_list || !entry)
return false;
/* Get current number of list entries */
num_entries = RBUF_LEN(core_list->entries);
/* Attempt to allocate memory for new entry */
if (!RBUF_TRYFIT(core_list->entries, num_entries + 1))
return false;
/* Allocation successful - increment array size */
RBUF_RESIZE(core_list->entries, num_entries + 1);
/* Get handle of new entry at end of list, and
* zero-initialise members */
list_entry = &core_list->entries[num_entries];
memset(list_entry, 0, sizeof(*list_entry));
/* Assign paths */
list_entry->remote_filename = entry->remote_filename;
list_entry->remote_core_path = entry->remote_core_path;
list_entry->local_core_path = entry->local_core_path;
list_entry->local_info_path = entry->local_info_path;
/* Assign core info */
list_entry->display_name = entry->display_name;
list_entry->description = entry->description;
list_entry->licenses_list = entry->licenses_list;
list_entry->is_experimental = entry->is_experimental;
/* Copy crc */
list_entry->crc = entry->crc;
/* Copy date */
memcpy(&list_entry->date, &entry->date, sizeof(core_updater_list_date_t));
return true;
}
/* Parses the contents of a single buildbot
* core listing and adds it to the specified
* core updater list */
static void core_updater_list_add_entry(
core_updater_list_t *core_list,
const char *path_dir_libretro,
const char *path_libretro_info,
const char *network_buildbot_url,
struct string_list *network_core_entry_list)
{
const char *date_str = NULL;
const char *crc_str = NULL;
const char *filename_str = NULL;
const core_updater_list_entry_t *search_entry = NULL;
core_updater_list_entry_t entry = {0};
if (!core_list || !network_core_entry_list)
goto error;
/* > Listings must have 3 entries:
* [date] [crc] [filename] */
if (network_core_entry_list->size < 3)
goto error;
/* Get handles of the individual listing strings */
date_str = network_core_entry_list->elems[0].data;
crc_str = network_core_entry_list->elems[1].data;
filename_str = network_core_entry_list->elems[2].data;
if ( string_is_empty(date_str)
|| string_is_empty(crc_str)
|| string_is_empty(filename_str))
goto error;
/* Check whether core file is already included
* in the list (this is *not* an error condition,
* it just means we can skip the current listing) */
if (core_updater_list_get_filename(core_list,
filename_str, &search_entry))
goto error;
/* Parse individual listing strings */
if (!core_updater_list_set_date(&entry, date_str))
goto error;
if (!core_updater_list_set_crc(&entry, crc_str))
goto error;
if (!core_updater_list_set_paths(
&entry,
path_dir_libretro,
path_libretro_info,
network_buildbot_url,
filename_str,
CORE_UPDATER_LIST_TYPE_BUILDBOT))
goto error;
if (!core_updater_list_set_core_info(
&entry,
entry.local_info_path,
filename_str))
goto error;
/* Add entry to list */
if (!core_updater_list_push_entry(core_list, &entry))
goto error;
return;
error:
/* This is not a *fatal* error - it just
* means one of the following:
* - The current line of entry text received
* from the buildbot is broken somehow
* (could be the case that the network buffer
* wasn't large enough to cache the entire
* string, so the last line was truncated)
* - We had insufficient memory to allocate a new
* entry in the core updater list
* In either case, the current entry is discarded
* and we move on to the next one
* (network transfers are fishy business, so we
* choose to ignore this sort of error - don't
* want the whole fetch to fail because of a
* trivial glitch...) */
core_updater_list_free_entry(&entry);
}
/* Core updater list qsort helper function */
static int core_updater_list_qsort_func(
const core_updater_list_entry_t *a, const core_updater_list_entry_t *b)
{
if (!a || !b)
return 0;
if (string_is_empty(a->display_name) || string_is_empty(b->display_name))
return 0;
return strcasecmp(a->display_name, b->display_name);
}
/* Sorts core updater list into alphabetical order */
static void core_updater_list_qsort(core_updater_list_t *core_list)
{
size_t num_entries;
if (!core_list)
return;
if ((num_entries = RBUF_LEN(core_list->entries)) < 2)
return;
if (core_list->entries)
qsort(
core_list->entries, num_entries,
sizeof(core_updater_list_entry_t),
(int (*)(const void *, const void *))
core_updater_list_qsort_func);
}
/* Reads the contents of a buildbot core list
* network request into the specified
* core_updater_list_t object.
* Returns false in the event of an error. */
bool core_updater_list_parse_network_data(
core_updater_list_t *core_list,
const char *path_dir_libretro,
const char *path_libretro_info,
const char *network_buildbot_url,
const char *data, size_t len)
{
size_t i;
char *data_buf = NULL;
struct string_list network_core_list = {0};
/* Sanity check */
if (!core_list || string_is_empty(data) || (len < 1))
goto error;
/* We're populating a list 'from scratch' - remove
* any existing entries */
core_updater_list_reset(core_list);
/* Input data string is not terminated - have
* to copy it to a temporary buffer... */
if (!(data_buf = (char*)malloc((len + 1) * sizeof(char))))
goto error;
memcpy(data_buf, data, len * sizeof(char));
data_buf[len] = '\0';
/* Split network listing request into lines */
string_list_initialize(&network_core_list);
if (!string_split_noalloc(&network_core_list, data_buf, "\n"))
goto error;
if (network_core_list.size < 1)
goto error;
/* Temporary data buffer is no longer required */
free(data_buf);
data_buf = NULL;
/* Loop over lines */
for (i = 0; i < network_core_list.size; i++)
{
struct string_list network_core_entry_list = {0};
const char *line = network_core_list.elems[i].data;
if (string_is_empty(line))
continue;
string_list_initialize(&network_core_entry_list);
/* Split line into listings info components */
string_split_noalloc(&network_core_entry_list, line, " ");
/* Parse listings info and add to core updater
* list */
core_updater_list_add_entry(
core_list,
path_dir_libretro,
path_libretro_info,
network_buildbot_url,
&network_core_entry_list);
/* Clean up */
string_list_deinitialize(&network_core_entry_list);
}
/* Sanity check */
if (RBUF_LEN(core_list->entries) < 1)
goto error;
/* Clean up */
string_list_deinitialize(&network_core_list);
/* Sort completed list */
core_updater_list_qsort(core_list);
/* Set list type */
core_list->type = CORE_UPDATER_LIST_TYPE_BUILDBOT;
return true;
error:
string_list_deinitialize(&network_core_list);
if (data_buf)
free(data_buf);
return false;
}
/* Parses a single play feature delivery core
* listing and adds it to the specified core
* updater list */
static void core_updater_list_add_pfd_entry(
core_updater_list_t *core_list,
const char *path_dir_libretro,
const char *path_libretro_info,
const char *filename_str)
{
const core_updater_list_entry_t *search_entry = NULL;
core_updater_list_entry_t entry = {0};
if (!core_list || string_is_empty(filename_str))
goto error;
/* Check whether core file is already included
* in the list (this is *not* an error condition,
* it just means we can skip the current listing) */
if (core_updater_list_get_filename(core_list,
filename_str, &search_entry))
goto error;
/* Note: Play feature delivery cores have no
* timestamp or CRC info - leave these fields
* zero initialised */
/* Populate entry fields */
if (!core_updater_list_set_paths(
&entry,
path_dir_libretro,
path_libretro_info,
NULL,
filename_str,
CORE_UPDATER_LIST_TYPE_PFD))
goto error;
if (!core_updater_list_set_core_info(
&entry,
entry.local_info_path,
filename_str))
goto error;
/* Add entry to list */
if (!core_updater_list_push_entry(core_list, &entry))
goto error;
return;
error:
/* This is not a *fatal* error - it just
* means one of the following:
* - The core listing entry obtained from the
* play feature delivery interface is broken
* somehow
* - We had insufficient memory to allocate a new
* entry in the core updater list
* In either case, the current entry is discarded
* and we move on to the next one */
core_updater_list_free_entry(&entry);
}
/* Reads the list of cores currently available
* via play feature delivery (PFD) into the
* specified core_updater_list_t object.
* Returns false in the event of an error. */
bool core_updater_list_parse_pfd_data(
core_updater_list_t *core_list,
const char *path_dir_libretro,
const char *path_libretro_info,
const struct string_list *pfd_cores)
{
size_t i;
/* Sanity check */
if (!core_list || !pfd_cores || (pfd_cores->size < 1))
return false;
/* We're populating a list 'from scratch' - remove
* any existing entries */
core_updater_list_reset(core_list);
/* Loop over play feature delivery core list */
for (i = 0; i < pfd_cores->size; i++)
{
const char *filename_str = pfd_cores->elems[i].data;
if (string_is_empty(filename_str))
continue;
/* Parse core file name and add to core
* updater list */
core_updater_list_add_pfd_entry(
core_list,
path_dir_libretro,
path_libretro_info,
filename_str);
}
/* Sanity check */
if (RBUF_LEN(core_list->entries) < 1)
return false;
/* Sort completed list */
core_updater_list_qsort(core_list);
/* Set list type */
core_list->type = CORE_UPDATER_LIST_TYPE_PFD;
return true;
}
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