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Add missing LibUSB 1.0 API function: libusb_get_string_descriptor().

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Reported by:	Xiaofan Chen
This commit is contained in:
Hans Petter Selasky 2012-05-07 14:07:13 +00:00
parent 51a65f35df
commit 78ed0e49ff
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=235128
4 changed files with 28 additions and 1 deletions
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1
lib/libusb/Makefile
View File

@ -74,6 +74,7 @@ MLINKS += libusb.3 libusb_get_active_config_descriptor.3
MLINKS += libusb.3 libusb_get_config_descriptor.3
MLINKS += libusb.3 libusb_get_config_descriptor_by_value.3
MLINKS += libusb.3 libusb_free_config_descriptor.3
MLINKS += libusb.3 libusb_get_string_descriptor.3
MLINKS += libusb.3 libusb_get_string_descriptor_ascii.3
MLINKS += libusb.3 libusb_parse_ss_endpoint_comp.3
MLINKS += libusb.3 libusb_free_ss_endpoint_comp.3

8
lib/libusb/libusb.3
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@ -26,7 +26,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd April 12, 2012
.Dd May 7, 2012
.Dt LIBUSB 3
.Os
.Sh NAME
@ -314,6 +314,12 @@ LIBUSB_ERROR code on failure.
Free a configuration descriptor.
.Pp
.Ft int
.Fn libusb_get_string_descriptor "libusb_device_handle *devh" "uint8_t desc_idx" "uint16_t langid" "unsigned char *data" "int length"
Retrieve a string descriptor in raw format.
Returns the number of bytes actually transferred on success
or a negative LIBUSB_ERROR code on failure.
.Pp
.Ft int
.Fn libusb_get_string_descriptor_ascii "libusb_device_handle *devh" "uint8_t desc_idx" "unsigned char *data" "int length"
Retrieve a string descriptor in C style ASCII.
Returns the positive number of bytes in the resulting ASCII string

1
lib/libusb/libusb.h
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@ -398,6 +398,7 @@ int libusb_get_active_config_descriptor(libusb_device * dev, struct libusb_confi
int libusb_get_config_descriptor(libusb_device * dev, uint8_t config_index, struct libusb_config_descriptor **config);
int libusb_get_config_descriptor_by_value(libusb_device * dev, uint8_t bConfigurationValue, struct libusb_config_descriptor **config);
void libusb_free_config_descriptor(struct libusb_config_descriptor *config);
int libusb_get_string_descriptor(libusb_device_handle * devh, uint8_t desc_index, uint16_t langid, unsigned char *data, int length);
int libusb_get_string_descriptor_ascii(libusb_device_handle * devh, uint8_t desc_index, uint8_t *data, int length);
int libusb_get_descriptor(libusb_device_handle * devh, uint8_t desc_type, uint8_t desc_index, uint8_t *data, int length);
int libusb_parse_ss_endpoint_comp(const void *buf, int len, struct libusb_ss_endpoint_companion_descriptor **ep_comp);

19
lib/libusb/libusb10_desc.c
View File

@ -293,6 +293,25 @@ libusb_free_config_descriptor(struct libusb_config_descriptor *config)
free(config);
}
int
libusb_get_string_descriptor(libusb_device_handle *pdev,
uint8_t desc_index, uint16_t langid, unsigned char *data,
int length)
{
if (pdev == NULL || data == NULL || length < 1)
return (LIBUSB_ERROR_INVALID_PARAM);
if (length > 65535)
length = 65535;
/* put some default data into the destination buffer */
data[0] = 0;
return (libusb_control_transfer(pdev, LIBUSB_ENDPOINT_IN,
LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | desc_index,
langid, data, length, 1000));
}
int
libusb_get_string_descriptor_ascii(libusb_device_handle *pdev,
uint8_t desc_index, unsigned char *data, int length)