ea5cc87c63
Add hex conversion libraries. We are going to replace sscanf() uses with them. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
35 lines
558 B
C
35 lines
558 B
C
#include "string.h"
|
|
|
|
static int hex(char ch)
|
|
{
|
|
if ((ch >= '0') && (ch <= '9'))
|
|
return ch - '0';
|
|
if ((ch >= 'a') && (ch <= 'f'))
|
|
return ch - 'a' + 10;
|
|
if ((ch >= 'A') && (ch <= 'F'))
|
|
return ch - 'A' + 10;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* While we find nice hex chars, build a long_val.
|
|
* Return number of chars processed.
|
|
*/
|
|
int hex2u64(const char *ptr, __u64 *long_val)
|
|
{
|
|
const char *p = ptr;
|
|
*long_val = 0;
|
|
|
|
while (*p) {
|
|
const int hex_val = hex(*p);
|
|
|
|
if (hex_val < 0)
|
|
break;
|
|
|
|
*long_val = (*long_val << 4) | hex_val;
|
|
p++;
|
|
}
|
|
|
|
return p - ptr;
|
|
}
|