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annotate target-utils/libc/strcasecmp.c @ 407:19e5a3e2f9c0

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fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents 7fb62fc724dc
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 }