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#include <sys/types.h>
int
hextobyte (const char *s)
{
int c;
if ( *s >= '0' && *s <= '9' )
c = 16 * (*s - '0');
else if ( *s >= 'A' && *s <= 'F' )
c = 16 * (10 + *s - 'A');
else if ( *s >= 'a' && *s <= 'f' )
c = 16 * (10 + *s - 'a');
else
return -1;
s++;
if ( *s >= '0' && *s <= '9' )
c += *s - '0';
else if ( *s >= 'A' && *s <= 'F' )
c += 10 + *s - 'A';
else if ( *s >= 'a' && *s <= 'f' )
c += 10 + *s - 'a';
else
return -1;
return c;
}
int
ascii_toupper (int c)
{
if (c >= 'a' && c <= 'z')
c &= ~0x20;
return c;
}
int
ascii_tolower (int c)
{
if (c >= 'A' && c <= 'Z')
c |= 0x20;
return c;
}
int
ascii_strcasecmp (const char *a, const char *b)
{
const unsigned char *p1 = (const unsigned char *)a;
const unsigned char *p2 = (const unsigned char *)b;
unsigned char c1, c2;
if (p1 == p2)
return 0;
do
{
c1 = ascii_tolower (*p1);
c2 = ascii_tolower (*p2);
if (c1 == '\0')
break;
++p1;
++p2;
}
while (c1 == c2);
return c1 - c2;
}
int
ascii_strncasecmp (const char *a, const char *b, size_t n)
{
const unsigned char *p1 = (const unsigned char *)a;
const unsigned char *p2 = (const unsigned char *)b;
unsigned char c1, c2;
if (p1 == p2 || !n )
return 0;
do
{
c1 = ascii_tolower (*p1);
c2 = ascii_tolower (*p2);
if ( !--n || c1 == '\0')
break;
++p1;
++p2;
}
while (c1 == c2);
return c1 - c2;
}
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