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[skip ci] Return dummy values if WebHID is unsupported

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Nintorch 2026-05-27 23:03:32 +05:00
parent 1b714eeb36
commit f1f69612e2
1 changed files with 19 additions and 9 deletions
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28
src/hidapi/emscripten/hid.c
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@ -44,6 +44,9 @@ static struct hid_api_version api_version = {
.patch = HID_API_VERSION_PATCH
};
static int initialized = 0;
static int webhid_supported = 0;
static hid_device *new_hid_device(void)
{
hid_device *dev = (hid_device*) calloc(1, sizeof(hid_device));
@ -70,9 +73,12 @@ HID_API_EXPORT const char* HID_API_CALL hid_version_str(void)
int HID_API_EXPORT hid_init(void)
{
return MAIN_THREAD_EM_ASM_INT({
return "hid" in navigator ? 0 : -1;
});
if (!initialized) {
webhid_supported = MAIN_THREAD_EM_ASM_INT({
return "hid" in navigator;
});
}
return webhid_supported ? 0 : -1;
}
int HID_API_EXPORT hid_exit(void)
@ -169,7 +175,9 @@ struct hid_device_info HID_API_EXPORT *hid_enumerate(unsigned short vendor_id, u
struct hid_device_info *root = NULL; /* return object */
struct hid_device_info *cur_dev = NULL;
hid_init();
if (hid_init() < 0) {
return NULL;
}
device_count = hid_js_get_device_count();
@ -288,7 +296,9 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path)
hid_device *dev = NULL;
int device_id = 0;
hid_init();
if (hid_init() < 0) {
return NULL;
}
/* register_global_error: global error is reset by hid_init */
#ifdef HIDAPI_WEBHID_DEBUG
@ -329,7 +339,7 @@ EM_ASYNC_JS(int, hid_js_write, (int device_id, int report_id, const unsigned cha
int HID_API_EXPORT hid_write(hid_device *dev, const unsigned char *data, size_t length)
{
if (length < 1)
if (!webhid_supported || length < 1)
return 0;
hid_js_write(dev->device_id, data[0], data+1, length-1);
return length;
@ -356,7 +366,7 @@ EM_ASYNC_JS(int, hid_js_read_timeout, (int device_id, unsigned char *data, size_
int HID_API_EXPORT hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
{
/* TODO: timeout */
if (length < 1)
if (!webhid_supported || length < 1)
return -1;
if (milliseconds == 0) {
if (dev->last_report) {
@ -404,7 +414,7 @@ EM_ASYNC_JS(void, hid_js_get_feature_report, (int device_id, int report_id, unsi
int HID_API_EXPORT hid_get_feature_report(hid_device *dev, unsigned char *data, size_t length)
{
if (length < 1)
if (!webhid_supported || length < 1)
return -1;
int report_id = (int)data[0];
hid_js_get_feature_report(dev->device_id, report_id, data, length);
@ -468,7 +478,7 @@ int HID_API_EXPORT_CALL hid_get_report_descriptor(hid_device *dev, unsigned char
return 0;
}
HID_API_EXPORT const wchar_t * HID_API_CALL hid_error(hid_device *dev)
HID_API_EXPORT const wchar_t * HID_API_CALL hid_error(hid_device *dev)
{
return L"";
}