FreeCalypso > hg > freecalypso-tools

annotate target-utils/libc/strcasecmp.c @ 466:5bcf12be0834

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ffstools/caltools: null pointer passing fixes
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 11 Feb 2019 05:50:45 +0000
parents 7fb62fc724dc
children
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7fb62fc724dc target-utils/libc: beginning of newlib-ectomy
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1 #include <sys/types.h>
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2
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3 /*
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4 * This array is designed for mapping upper and lower case letter
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5 * together for a case independent comparison. The mappings are
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6 * based upon ascii character sequences.
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7 */
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8 static const u_char charmap[] = {
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9 '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
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10 '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
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11 '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
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12 '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
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13 '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
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14 '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
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15 '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
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16 '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
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17 '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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18 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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19 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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20 '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
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21 '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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22 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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23 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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24 '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
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25 '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
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26 '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
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27 '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
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28 '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
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29 '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
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30 '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
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31 '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
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32 '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
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33 '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
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34 '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
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35 '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
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36 '\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337',
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37 '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
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38 '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
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39 '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
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40 '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
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41 };
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42
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43 strcasecmp(s1, s2)
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44 const char *s1, *s2;
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45 {
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46 register const u_char *us1 = (const u_char *)s1,
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47 *us2 = (const u_char *)s2;
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48
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49 while (charmap[*us1] == charmap[*us2++])
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50 if (*us1++ == '\0')
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51 return(0);
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52 return(charmap[*us1] - charmap[*--us2]);
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53 }
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54
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55 strncasecmp(s1, s2, n)
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56 const char *s1, *s2;
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57 register int n;
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58 {
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59 register const u_char *us1 = (const u_char *)s1,
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60 *us2 = (const u_char *)s2;
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61
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62 while (--n >= 0 && charmap[*us1] == charmap[*us2++])
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63 if (*us1++ == '\0')
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64 return(0);
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65 return(n < 0 ? 0 : charmap[*us1] - charmap[*--us2]);
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66 }