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Overview
Comment: | Simplification to the ISO8610 parser in the imnplementation of date/time functions. |
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Downloads: | Tarball | ZIP archive |
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
b9159f42a517a95ae52464c96431708c |
User & Date: | drh 2016-01-14 19:32:46.777 |
Context
2016-01-14
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20:05 | Add a test to verify that the fts3 and fts5 "unicode61" tokenizers are byte for byte compatible. (check-in: 8ec8314354 user: dan tags: trunk) | |
19:32 | Simplification to the ISO8610 parser in the imnplementation of date/time functions. (check-in: b9159f42a5 user: drh tags: trunk) | |
18:01 | Minor adjustments to the MSVC makefile. (check-in: e2cba1bbfd user: mistachkin tags: trunk) | |
Changes
Changes to src/date.c.
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66 67 68 69 70 71 72 | char validJD; /* True (1) if iJD is valid */ char validTZ; /* True (1) if tz is valid */ char tzSet; /* Timezone was set explicitly */ }; /* | | | > > > > | > > | | | | > > > > < > > > > > | > > > < | < < | < < | > > | > | > | | < | | > | 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | char validJD; /* True (1) if iJD is valid */ char validTZ; /* True (1) if tz is valid */ char tzSet; /* Timezone was set explicitly */ }; /* ** Convert zDate into one or more integers according to the conversion ** specifier zFormat. ** ** zFormat[] contains 4 characters for each integer converted, except for ** the last integer which is specified by three characters. The meaning ** of a four-character format specifiers ABCD is: ** ** A: number of digits to convert. Always "2" or "4". ** B: minimum value. Always "0" or "1". ** C: maximum value, decoded as: ** a: 12 ** b: 14 ** c: 24 ** d: 31 ** e: 59 ** f: 9999 ** D: the separator character, or \000 to indicate this is the ** last number to convert. ** ** Example: To translate an ISO-8601 date YYYY-MM-DD, the format would ** be "40f-21a-20c". The "40f-" indicates the 4-digit year followed by "-". ** The "21a-" indicates the 2-digit month followed by "-". The "20c" indicates ** the 2-digit day which is the last integer in the set. ** ** The function returns the number of successful conversions. */ static int getDigits(const char *zDate, const char *zFormat, ...){ /* The aMx[] array translates the 3rd character of each format ** spec into a max size: a b c d e f */ static const u16 aMx[] = { 12, 14, 24, 31, 59, 9999 }; va_list ap; int cnt = 0; char nextC; va_start(ap, zFormat); do{ char N = zFormat[0] - '0'; char min = zFormat[1] - '0'; int val = 0; u16 max; assert( zFormat[2]>='a' && zFormat[2]<='f' ); max = aMx[zFormat[2] - 'a']; nextC = zFormat[3]; val = 0; while( N-- ){ if( !sqlite3Isdigit(*zDate) ){ goto end_getDigits; } val = val*10 + *zDate - '0'; zDate++; } if( val<(int)min || val>(int)max || (nextC!=0 && nextC!=*zDate) ){ goto end_getDigits; } *va_arg(ap,int*) = val; zDate++; cnt++; zFormat += 4; }while( nextC ); end_getDigits: va_end(ap); return cnt; } /* |
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148 149 150 151 152 153 154 | }else if( c=='Z' || c=='z' ){ zDate++; goto zulu_time; }else{ return c!=0; } zDate++; | | | | | 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 | }else if( c=='Z' || c=='z' ){ zDate++; goto zulu_time; }else{ return c!=0; } zDate++; if( getDigits(zDate, "20b:20e", &nHr, &nMn)!=2 ){ return 1; } zDate += 5; p->tz = sgn*(nMn + nHr*60); zulu_time: while( sqlite3Isspace(*zDate) ){ zDate++; } p->tzSet = 1; return *zDate!=0; } /* ** Parse times of the form HH:MM or HH:MM:SS or HH:MM:SS.FFFF. ** The HH, MM, and SS must each be exactly 2 digits. The ** fractional seconds FFFF can be one or more digits. ** ** Return 1 if there is a parsing error and 0 on success. */ static int parseHhMmSs(const char *zDate, DateTime *p){ int h, m, s; double ms = 0.0; if( getDigits(zDate, "20c:20e", &h, &m)!=2 ){ return 1; } zDate += 5; if( *zDate==':' ){ zDate++; if( getDigits(zDate, "20e", &s)!=1 ){ return 1; } zDate += 2; if( *zDate=='.' && sqlite3Isdigit(zDate[1]) ){ double rScale = 1.0; zDate++; while( sqlite3Isdigit(*zDate) ){ |
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263 264 265 266 267 268 269 | if( zDate[0]=='-' ){ zDate++; neg = 1; }else{ neg = 0; } | | | 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 | if( zDate[0]=='-' ){ zDate++; neg = 1; }else{ neg = 0; } if( getDigits(zDate, "40f-21a-21d", &Y, &M, &D)!=3 ){ return 1; } zDate += 10; while( sqlite3Isspace(*zDate) || 'T'==*(u8*)zDate ){ zDate++; } if( parseHhMmSs(zDate, p)==0 ){ /* We got the time */ }else if( *zDate==0 ){ |
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