1__BITMAP_PARSE(9)       Basic Kernel Library Functions       __BITMAP_PARSE(9)
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NAME

6       __bitmap_parse - convert an ASCII hex string into a bitmap.
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SYNOPSIS

9       int __bitmap_parse(const char * buf, unsigned int buflen, int is_user,
10                          unsigned long * maskp, int nmaskbits);
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ARGUMENTS

13       buf
14           pointer to buffer containing string.
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16       buflen
17           buffer size in bytes. If string is smaller than this then it must
18           be terminated with a \0.
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20       is_user
21           location of buffer, 0 indicates kernel space
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23       maskp
24           pointer to bitmap array that will contain result.
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26       nmaskbits
27           size of bitmap, in bits.
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DESCRIPTION

30       Commas group hex digits into chunks. Each chunk defines exactly 32 bits
31       of the resultant bitmask. No chunk may specify a value larger than 32
32       bits (-EOVERFLOW), and if a chunk specifies a smaller value then
33       leading 0-bits are prepended.  -EINVAL is returned for illegal
34       characters and for grouping errors such as “1,,5”, “,44”, “,” and "".
35       Leading and trailing whitespace accepted, but not embedded whitespace.
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38Kernel Hackers Manual 2.6.         June 2019                 __BITMAP_PARSE(9)
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