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Annotation of 43BSD/etc/named/cistrcmp.c, revision 1.1.1.1

1.1       root        1: #ifndef lint
                      2: static char sccsid[] = "@(#)cistrcmp.c 4.3 (Berkeley) 6/4/86";
                      3: #endif
                      4: 
                      5: /*
                      6:  * Copyright (c) 1986 Regents of the University of California.
                      7:  * All rights reserved.  The Berkeley software License Agreement
                      8:  * specifies the terms and conditions for redistribution.
                      9:  */
                     10: 
                     11: /*
                     12:  * This array is designed for mapping upper and lower case letter
                     13:  * together for a case independent comparison.  The mappings are
                     14:  * based upon ascii character sequences.
                     15:  */
                     16: 
                     17: static char charmap[] = {
                     18:        '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
                     19:        '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
                     20:        '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
                     21:        '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
                     22:        '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
                     23:        '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
                     24:        '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
                     25:        '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
                     26:        '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
                     27:        '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
                     28:        '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
                     29:        '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
                     30:        '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
                     31:        '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
                     32:        '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
                     33:        '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
                     34:        '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
                     35:        '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
                     36:        '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
                     37:        '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
                     38:        '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
                     39:        '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
                     40:        '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
                     41:        '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
                     42:        '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
                     43:        '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
                     44:        '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
                     45:        '\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337',
                     46:        '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
                     47:        '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
                     48:        '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
                     49:        '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
                     50: };
                     51: 
                     52: cistrcmp(s1, s2)
                     53: register char *s1, *s2;
                     54: {
                     55:        register char *cm = charmap;
                     56: 
                     57:        while (cm[*s1] == cm[*s2++])
                     58:                if (*s1++=='\0')
                     59:                        return(0);
                     60:        return(cm[*s1] - cm[*--s2]);
                     61: }
                     62: 
                     63: cistrncmp(s1, s2, n)
                     64: register char *s1, *s2;
                     65: register n;
                     66: {
                     67:        register char *cm = charmap;
                     68: 
                     69:        while (--n >= 0 && cm[*s1] == cm[*s2++])
                     70:                if (*s1++ == '\0')
                     71:                        return(0);
                     72:        return(n<0 ? 0 : cm[*s1] - cm[*--s2]);
                     73: }

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