개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

usb_parse_data(9f)

usb_parse_data(9F)             Kernel Functions             usb_parse_data(9F)



NAME
       usb_parse_data  -  Tokenize  and align the bytes of raw variable-format
       data

SYNOPSIS
       #include <sys/usb/usba.h>

       size_t usb_parse_data(char *format, uchar_t *data,
            size_t datalen, void *structure, size_t structlen);

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI)

PARAMETERS
       format       Null terminated string describing the format of  the  data
                    structure  for  general-purpose byte swapping. The letters
                    "c," "s," "l," and "L" represent 1, 2, 4 and 8 byte  quan‐
                    tities,  respectively.  A  descriptor  that  consists of a
                    short and two bytes would be described by "scc." A  number
                    preceding  a letter serves as a multiplier of that letter.
                    A format equivalent to "scc" is "s2c."


       data         Raw descriptor data to parse.


       datalen      Length, in bytes, of the raw descriptor data buffer.


       structure    Destination data buffer where parsed data is returned.


       structlen    Length, in bytes, of the destination data  buffer.  Parsed
                    result length will not exceed this value.


DESCRIPTION
       The  usb_parse_data  function  parses  data  such  as a variable-format
       class- or vendor-specific descriptor. The function also  tokenizes  and
       aligns  the bytes of raw descriptor data into fields of a variable-for‐
       mat descriptor.


       While the USBA framework can parse the endpoint, interface,  configura‐
       tion,  and string descriptors defined by the USB 2.0 specification, the
       format of class- or vendor-specific descriptors  cannot  be  explicitly
       defined  by  the  specification and will be unique for each. The format
       argument defines how to parse such a descriptor.


       While the USB specification defines bit ordering as little-endian, this
       routine  (like  the entire API), converts the data to the endianness of
       the host.


       The structlen parameter defines the size of the destination  data  buf‐
       fer.  Data  is truncated to this size if the destination data buffer is
       too small.

RETURN VALUES
       On success: Returns the size (in bytes) of the parsed data result.


       On failure: Returns 0. (Same as USB_PARSE_ERROR).

CONTEXT
       May be called from user, kernel or interrupt context.

EXAMPLES
           /*
            * Parse raw descriptor data in buf, putting result into ret_descr.
            * ret_buf_len holds the size of ret_descr buf;  routine returns
            * number of resulting bytes.
            *
            * Descriptor being parsed has 2 chars, followed by one short,
            * 3 chars and one more short.
            */
           size_t size_of_returned_descr;
           xxx_descr_t ret_descr;

            size_of_returned_descr = usb_parse_data("ccscccs",
               buf, sizeof(buf), (void *)ret_descr, (sizeof)xxx_descr_t));
           if (size_of_returned_descr < (sizeof (xxx_descr_t))) {
                    /* Data truncated. */
           }

           or:

           size_of_returned_descr = usb_parse_data("2cs3cs",
               buf, sizeof(buf), (void *)ret_descr, (sizeof)xxx_descr_t));
           if (size_of_returned_descr < (sizeof (xxx_descr_t))) {
                   /* Data truncated. */
           }


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE  TYPEAT‐
       TRIBUTE  VALUE  _  ArchitecturePCI-based systems _ Interface Stability‐
       Committed _ Availabilitysystem/io/usb


SEE ALSO
       attributes(7),          usb_get_cfg(9F),          usb_get_dev_data(9F),
       usb_get_string_descr(9F)



Oracle Solaris 11.4               5 Jan 2004                usb_parse_data(9F)