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update sdl Merge commit '644725478f4de0f074a6834e8423ac36dce3974f'

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Green Sky
2023-09-23 18:53:11 +02:00
parent 12e8b5d6c4 644725478f
commit dd316d2589
172 changed files with 7495 additions and 4062 deletions
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130
external/sdl/SDL/src/hidapi/linux/hid.c vendored
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@ -206,7 +206,7 @@ static wchar_t *copy_udev_string(struct udev_device *dev, const char *udev_name)
* Returns 1 if successful, 0 if an invalid key
* Sets data_len and key_size when successful
*/
static int get_hid_item_size(__u8 *report_descriptor, unsigned int pos, __u32 size, int *data_len, int *key_size)
static int get_hid_item_size(const __u8 *report_descriptor, __u32 size, unsigned int pos, int *data_len, int *key_size)
{
int key = report_descriptor[pos];
int size_code;
@ -262,7 +262,7 @@ static int get_hid_item_size(__u8 *report_descriptor, unsigned int pos, __u32 si
* Get bytes from a HID Report Descriptor.
* Only call with a num_bytes of 0, 1, 2, or 4.
*/
static __u32 get_hid_report_bytes(__u8 *rpt, size_t len, size_t num_bytes, size_t cur)
static __u32 get_hid_report_bytes(const __u8 *rpt, size_t len, size_t num_bytes, size_t cur)
{
/* Return if there aren't enough bytes. */
if (cur + num_bytes >= len)
@ -285,6 +285,60 @@ static __u32 get_hid_report_bytes(__u8 *rpt, size_t len, size_t num_bytes, size_
return 0;
}
/*
* Iterates until the end of a Collection.
* Assumes that *pos is exactly at the beginning of a Collection.
* Skips all nested Collection, i.e. iterates until the end of current level Collection.
*
* The return value is non-0 when an end of current Collection is found,
* 0 when error is occured (broken Descriptor, end of a Collection is found before its begin,
* or no Collection is found at all).
*/
static int hid_iterate_over_collection(const __u8 *report_descriptor, __u32 size, unsigned int *pos, int *data_len, int *key_size)
{
int collection_level = 0;
while (*pos < size) {
int key = report_descriptor[*pos];
int key_cmd = key & 0xfc;
/* Determine data_len and key_size */
if (!get_hid_item_size(report_descriptor, size, *pos, data_len, key_size))
return 0; /* malformed report */
switch (key_cmd) {
case 0xa0: /* Collection 6.2.2.4 (Main) */
collection_level++;
break;
case 0xc0: /* End Collection 6.2.2.4 (Main) */
collection_level--;
break;
}
if (collection_level < 0) {
/* Broken descriptor or someone is using this function wrong,
* i.e. should be called exactly at the collection start */
return 0;
}
if (collection_level == 0) {
/* Found it!
* Also possible when called not at the collection start, but should not happen if used correctly */
return 1;
}
*pos += *data_len + *key_size;
}
return 0; /* Did not find the end of a Collection */
}
struct hid_usage_iterator {
unsigned int pos;
int usage_page_found;
unsigned short usage_page;
};
/*
* Retrieves the device's Usage Page and Usage from the report descriptor.
* The algorithm returns the current Usage Page/Usage pair whenever a new
@ -302,63 +356,64 @@ static __u32 get_hid_report_bytes(__u8 *rpt, size_t len, size_t num_bytes, size_
* 1 when finished processing descriptor.
* -1 on a malformed report.
*/
static int get_next_hid_usage(__u8 *report_descriptor, __u32 size, unsigned int *pos, unsigned short *usage_page, unsigned short *usage)
static int get_next_hid_usage(const __u8 *report_descriptor, __u32 size, struct hid_usage_iterator *ctx, unsigned short *usage_page, unsigned short *usage)
{
int data_len, key_size;
int initial = *pos == 0; /* Used to handle case where no top-level application collection is defined */
int usage_pair_ready = 0;
int initial = ctx->pos == 0; /* Used to handle case where no top-level application collection is defined */
/* Usage is a Local Item, it must be set before each Main Item (Collection) before a pair is returned */
int usage_found = 0;
while (*pos < size) {
int key = report_descriptor[*pos];
while (ctx->pos < size) {
int key = report_descriptor[ctx->pos];
int key_cmd = key & 0xfc;
/* Determine data_len and key_size */
if (!get_hid_item_size(report_descriptor, *pos, size, &data_len, &key_size))
if (!get_hid_item_size(report_descriptor, size, ctx->pos, &data_len, &key_size))
return -1; /* malformed report */
switch (key_cmd) {
case 0x4: /* Usage Page 6.2.2.7 (Global) */
*usage_page = get_hid_report_bytes(report_descriptor, size, data_len, *pos);
ctx->usage_page = get_hid_report_bytes(report_descriptor, size, data_len, ctx->pos);
ctx->usage_page_found = 1;
break;
case 0x8: /* Usage 6.2.2.8 (Local) */
*usage = get_hid_report_bytes(report_descriptor, size, data_len, *pos);
usage_found = 1;
if (data_len == 4) { /* Usages 5.5 / Usage Page 6.2.2.7 */
ctx->usage_page = get_hid_report_bytes(report_descriptor, size, 2, ctx->pos + 2);
ctx->usage_page_found = 1;
*usage = get_hid_report_bytes(report_descriptor, size, 2, ctx->pos);
usage_found = 1;
}
else {
*usage = get_hid_report_bytes(report_descriptor, size, data_len, ctx->pos);
usage_found = 1;
}
break;
case 0xa0: /* Collection 6.2.2.4 (Main) */
/* A Usage Item (Local) must be found for the pair to be valid */
if (usage_found)
usage_pair_ready = 1;
if (!hid_iterate_over_collection(report_descriptor, size, &ctx->pos, &data_len, &key_size)) {
return -1;
}
/* Usage is a Local Item, unset it */
usage_found = 0;
break;
/* A pair is valid - to be reported when Collection is found */
if (usage_found && ctx->usage_page_found) {
*usage_page = ctx->usage_page;
return 0;
}
case 0x80: /* Input 6.2.2.4 (Main) */
case 0x90: /* Output 6.2.2.4 (Main) */
case 0xb0: /* Feature 6.2.2.4 (Main) */
case 0xc0: /* End Collection 6.2.2.4 (Main) */
/* Usage is a Local Item, unset it */
usage_found = 0;
break;
}
/* Skip over this key and its associated data */
*pos += data_len + key_size;
/* Return usage pair */
if (usage_pair_ready)
return 0;
ctx->pos += data_len + key_size;
}
/* If no top-level application collection is found and usage page/usage pair is found, pair is valid
https://docs.microsoft.com/en-us/windows-hardware/drivers/hid/top-level-collections */
if (initial && usage_found)
return 0; /* success */
if (initial && usage_found && ctx->usage_page_found) {
*usage_page = ctx->usage_page;
return 0; /* success */
}
return 1; /* finished processing */
}
@ -804,12 +859,14 @@ static struct hid_device_info * create_device_info_for_device(struct udev_device
result = get_hid_report_descriptor_from_sysfs(sysfs_path, &report_desc);
if (result >= 0) {
unsigned short page = 0, usage = 0;
unsigned int pos = 0;
struct hid_usage_iterator usage_iterator;
memset(&usage_iterator, 0, sizeof(usage_iterator));
/*
* Parse the first usage and usage page
* out of the report descriptor.
*/
if (!get_next_hid_usage(report_desc.value, report_desc.size, &pos, &page, &usage)) {
if (!get_next_hid_usage(report_desc.value, report_desc.size, &usage_iterator, &page, &usage)) {
cur_dev->usage_page = page;
cur_dev->usage = usage;
}
@ -818,7 +875,7 @@ static struct hid_device_info * create_device_info_for_device(struct udev_device
* Parse any additional usage and usage pages
* out of the report descriptor.
*/
while (!get_next_hid_usage(report_desc.value, report_desc.size, &pos, &page, &usage)) {
while (!get_next_hid_usage(report_desc.value, report_desc.size, &usage_iterator, &page, &usage)) {
/* Create new record for additional usage pairs */
struct hid_device_info *tmp = (struct hid_device_info*) calloc(1, sizeof(struct hid_device_info));
struct hid_device_info *prev_dev = cur_dev;
@ -980,9 +1037,10 @@ struct hid_device_info HID_API_EXPORT *hid_enumerate(unsigned short vendor_id,
struct hidraw_report_descriptor report_desc;
unsigned short page = 0, usage = 0;
unsigned int pos = 0;
if (get_hid_report_descriptor_from_sysfs(sysfs_path, &report_desc) >= 0) {
get_next_hid_usage(report_desc.value, report_desc.size, &pos, &page, &usage);
struct hid_usage_iterator usage_iterator;
memset(&usage_iterator, 0, sizeof(usage_iterator));
get_next_hid_usage(report_desc.value, report_desc.size, &usage_iterator, &page, &usage);
}
if (HIDAPI_IGNORE_DEVICE(bus_type, dev_vid, dev_pid, page, usage)) {
continue;