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