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core: Add helper find_alt_endpoint()

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This commit is contained in:
Orhan aib Kavrakoglu
2022-07-21 10:09:04 +03:00
committed by Tormod Volden
parent 6c2149662a
commit 94eb23991b
2 changed files with 28 additions and 1 deletions
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27
libusb/core.c
View File

@@ -1081,6 +1081,33 @@ out:
return r;
}
static const struct libusb_endpoint_descriptor *find_alt_endpoint(
struct libusb_config_descriptor *config,
int iface_idx, int altsetting_idx, unsigned char endpoint)
{
if (iface_idx >= config->bNumInterfaces) {
return NULL;
}
const struct libusb_interface *iface = &config->interface[iface_idx];
if (altsetting_idx >= iface->num_altsetting) {
return NULL;
}
const struct libusb_interface_descriptor *altsetting
= &iface->altsetting[altsetting_idx];
int ep_idx;
for (ep_idx = 0; ep_idx < altsetting->bNumEndpoints; ep_idx++) {
const struct libusb_endpoint_descriptor *ep =
&altsetting->endpoint[ep_idx];
if (ep->bEndpointAddress == endpoint)
return ep;
}
return NULL;
}
static int get_endpoint_max_packet_size(libusb_device *dev,
const struct libusb_endpoint_descriptor *ep)
{

2
libusb/version_nano.h
View File

@@ -1 +1 @@
#define LIBUSB_NANO 11773
#define LIBUSB_NANO 11774