Mercurial > bday
annotate bday.c @ 24:c621d710d12e default tip
added VERSION to man page
| author | markus schnalke <meillo@marmaro.de> |
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| date | Mon, 24 Feb 2014 21:44:02 +0100 |
| parents | c1cd1d444353 |
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| rev | line source |
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1 /* |
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2 bday -- Birthday/Anniversary reminder |
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3 |
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4 (c) 2007,2014 markus schnalke <meillo@marmaro.de> |
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5 (c) 1994-1999 AS Mortimer |
| 8 | 6 |
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7 This program is free software; you can redistribute it and/or |
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8 modify it under the terms of the GNU General Public License as |
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9 published by the Free Software Foundation; either version 2 of the |
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10 License, or (at your option) any later version. You may also |
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11 distribute it under the Artistic License, as comes with Perl. |
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12 |
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13 This program is distributed in the hope that it will be useful, |
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with this program; if not, write to the Free Software |
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19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 8 | 20 |
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21 You should also have recieved a copy of the Artistic license with |
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22 this program. |
| 8 | 23 |
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24 ===================================================================== |
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25 |
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26 Input is read through standard input. For example: bday < ~/.birthdays |
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27 The input (file) has to have the following format: |
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28 |
| 16 | 29 date flags text |
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30 |
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31 where: |
| 16 | 32 date is YYYY-MM-DD |
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33 flags is optionally |
| 16 | 34 #ann for an anniversary |
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35 and optionally |
| 16 | 36 #w<n> to set the warn-in-advance time to n days |
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37 (don't include the brackets! :) |
| 16 | 38 separated by spaces. |
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39 |
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40 Lines preceeded by # are treated as comments. |
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41 |
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42 Note: If you deviate from this format, I cannot guarantee anything about |
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43 it's behaviour. In most cases, it will just quietly ignore the |
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44 error, which probably isn't ideal behaviour. Oh, well. |
| 8 | 45 |
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46 ===================================================================== |
| 8 | 47 */ |
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48 |
| 7 | 49 |
| 8 | 50 /* standard time to warn in advance, when no explicit w flag is given. */ |
| 51 #define DEF_WARN 14 | |
| 7 | 52 |
| 53 | |
| 54 #include <stdarg.h> | |
| 55 #include <stdio.h> | |
| 56 #include <stdlib.h> | |
| 57 #include <string.h> | |
| 58 #include <sys/types.h> | |
| 59 #include <time.h> | |
| 60 #include <unistd.h> | |
| 61 | |
| 62 | |
| 63 | |
| 64 /* ========== Global constants and data types */ | |
| 65 | |
| 66 | |
| 67 /* -------- modifier flags */ | |
| 68 #define F_MTYPE 0x07 | |
| 69 #define F_TANNIVERSARY 2 | |
| 70 | |
| 71 /* flags processed immediately on encountering */ | |
| 72 #define F_MIMMEDIATE 0x24 | |
| 73 #define F_WTIME_P 0x08 | |
| 74 | |
| 16 | 75 struct _ftable { |
| 76 char* txt; | |
| 77 unsigned flag; | |
| 78 }; | |
| 7 | 79 const struct _ftable FTABLE[]; |
| 80 | |
| 81 struct date { | |
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82 unsigned day; |
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83 unsigned month; |
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84 unsigned year; |
| 7 | 85 }; |
| 86 | |
| 87 struct event { | |
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88 char* text; |
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89 struct date date; |
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90 int warn; |
| 7 | 91 }; |
| 92 | |
| 93 /* ========== Global Variables */ | |
| 94 | |
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95 struct event *readlist(void); |
| 7 | 96 void gettoday(void); |
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97 unsigned delta(struct date *); |
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98 unsigned ddiff(struct date *D1, struct date *D2); |
| 16 | 99 void liststrings(struct event *evl); |
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100 char *tdelta(struct date *d); |
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101 char *ttime(int yr, int mn, int wk, int dy); |
| 16 | 102 char *skptok(char *ptr); |
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103 int evcmp(const void *e1, const void *e2); |
| 7 | 104 |
| 105 | |
| 106 struct date today; | |
| 16 | 107 int def_warn = DEF_WARN; |
| 7 | 108 |
| 109 | |
| 110 const struct _ftable FTABLE[] = { | |
| 16 | 111 {"#ann",F_TANNIVERSARY}, |
| 112 {"#w", F_WTIME_P}, | |
| 7 | 113 {NULL, 0} |
| 114 }; | |
| 115 | |
| 116 | |
| 117 | |
| 118 | |
| 119 | |
| 120 | |
| 121 /* | |
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122 xmalloc/xrealloc functions |
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123 Note: the x* functions are lifted straight from the GNU libc info docs |
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124 $Id: xmalloc.c,v 1.2 1999/01/16 17:08:59 andy Exp $ |
| 7 | 125 */ |
| 126 | |
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127 void * |
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128 xmalloc(size_t size) |
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129 { |
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130 register void *value = malloc (size); |
| 7 | 131 if (value == 0) { |
| 132 fprintf(stderr, "virtual memory exhausted\n"); | |
| 133 exit(1); | |
| 134 } | |
| 135 return value; | |
| 136 } | |
| 137 | |
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138 void * |
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139 xrealloc(void *ptr, size_t size) |
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140 { |
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141 register void *value = realloc (ptr, size); |
| 7 | 142 if (value == 0) { |
| 143 fprintf(stderr, "virtual memory exhausted\n"); | |
| 144 exit(1); | |
| 145 } | |
| 146 return value; | |
| 147 } | |
| 148 | |
| 8 | 149 |
| 7 | 150 /* ========== */ |
| 151 | |
| 152 | |
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153 /* |
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154 like strcat(), but lets the buffer automagically grow :-) |
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155 */ |
| 16 | 156 int |
| 157 append(char *where, int size, char *what) | |
| 158 { | |
| 159 if (strlen(what) > ((size) - strlen(where))) { | |
| 160 xrealloc(where, (size) + 128 + strlen(what)); | |
| 161 size += 128 + strlen(what); | |
| 162 } | |
| 163 strcat(where, what); | |
| 164 return size; | |
| 165 } | |
| 7 | 166 |
| 167 /* ========== */ | |
| 168 | |
| 16 | 169 |
| 170 int | |
| 171 before(struct date a, struct date b) | |
| 172 { | |
| 173 if (a.month < b.month) { | |
| 174 return 1; | |
| 175 } else if (a.month == b.month && a.day < b.day) { | |
| 176 return 1; | |
| 177 } else { | |
| 178 return 0; | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 int | |
| 183 ydelta(struct date a, struct date b) | |
| 184 { | |
| 185 return b.year - a.year + before(a, b); | |
| 186 } | |
| 187 | |
| 188 /* | |
| 189 returns the length of the given month | |
| 190 */ | |
| 191 int | |
| 192 mlen(int month, int year) | |
| 193 { | |
| 194 unsigned mlendat[] = {31,0,31,30,31,30,31,31,30,31,30,31}; | |
| 195 | |
| 196 if (mlendat[month - 1]) { | |
| 197 return mlendat[month - 1]; | |
| 198 } else { | |
| 199 if (year%4==0 && (year%100!=0 || year%400==0)) { | |
| 200 return 29; | |
| 201 } else { | |
| 202 return 28; | |
| 203 } | |
| 204 } | |
| 205 } | |
| 206 | |
| 207 | |
| 208 | |
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209 /* |
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210 returns delta(d) in days, weeks, months, etc |
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211 the returned buffer is malloc()ed, do not forget to free() it |
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212 */ |
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213 char * |
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214 tdelta(struct date *d) |
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215 { |
| 7 | 216 int dy, wk, mn, yr; |
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217 char *tmp; |
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218 char *buf = xmalloc(128); |
| 7 | 219 int size = 128; |
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220 |
| 7 | 221 *buf = 0; |
| 222 switch (delta(d)) { | |
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223 case 0: |
| 16 | 224 size = append(buf, size, "TODAY"); |
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225 return buf; |
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226 case 1: |
| 16 | 227 size = append(buf, size, "Tomorrow"); |
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228 return buf; |
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229 default: |
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230 /* like delta(), we ignore the year */ |
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231 yr = -before(*d, today); |
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232 mn = d->month - today.month; |
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233 dy = d->day - today.day; |
| 7 | 234 |
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235 if (dy < 0) { |
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236 dy += mlen(today.month, today.year); |
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237 mn--; |
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238 } |
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239 if (mn < 0) { |
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240 mn += 12; |
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241 yr++; |
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242 } |
| 7 | 243 |
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244 wk = (dy / 7); |
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245 dy %= 7; |
| 7 | 246 |
| 16 | 247 size = append(buf, size, "In "); |
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248 tmp = ttime(yr, mn, wk, dy); |
| 16 | 249 size = append(buf, size, tmp); |
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250 free(tmp); |
| 7 | 251 |
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252 return buf; |
| 7 | 253 } |
| 254 } | |
| 255 | |
| 256 | |
| 257 | |
| 258 | |
| 259 | |
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260 void |
| 16 | 261 donum(char *buf, int size, int n, char *txt, int *terms) |
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262 { |
| 16 | 263 char tmp[128]; |
| 264 | |
| 265 if (n <= 0) { | |
| 266 return; | |
| 267 } | |
| 268 snprintf(tmp, sizeof(tmp), "%d", n); | |
| 269 size = append(buf, size, tmp); | |
| 270 size = append(buf, size, " "); | |
| 271 size = append(buf, size, txt); | |
| 272 if (n != 1) { | |
| 273 size = append(buf, size, "s"); | |
| 274 } | |
| 275 if (--*terms == 1) { | |
| 276 size = append(buf, size, " and "); | |
| 277 } else if (*terms > 1) { | |
| 278 size = append(buf, size, ", "); | |
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279 } |
| 7 | 280 } |
| 281 | |
| 282 | |
| 283 /* returns allocated buffer, don't forget to free() */ | |
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284 char * |
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285 ttime(int yr, int mn, int wk, int dy) |
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286 { |
| 7 | 287 int size = 128; |
| 16 | 288 char *buf = xmalloc(size); |
| 289 int terms = (yr!=0) + (mn!=0) + (wk!=0) + (dy!=0); | |
| 7 | 290 |
| 16 | 291 *buf = '\0'; /* Initialize buffer */ |
| 7 | 292 |
| 16 | 293 donum(buf, size, yr, "year", &terms); |
| 294 donum(buf, size, mn, "month", &terms); | |
| 295 donum(buf, size, wk, "week", &terms); | |
| 296 donum(buf, size, dy, "day", &terms); | |
| 7 | 297 |
| 298 return buf; | |
| 299 } | |
| 300 | |
| 301 | |
| 302 | |
| 303 | |
| 304 | |
| 305 | |
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306 /* |
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307 lists the birthdays in their string format, one by one, and passes |
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308 the string to a function. |
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309 */ |
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310 void |
| 16 | 311 liststrings(struct event *evl) |
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312 { |
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313 int i; |
| 7 | 314 char *buf, *tmp; |
| 315 int size; | |
| 316 | |
| 16 | 317 for (i=0; evl[i].text; i++) { |
| 318 size = 128; | |
| 319 buf = xmalloc(size); | |
| 7 | 320 *buf = '\0'; |
| 321 | |
| 322 if (evl[i].warn == -1 && delta(&(evl[i].date))==0) { | |
| 16 | 323 size = append(buf, size, evl[i].text); |
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324 } else if (delta(&(evl[i].date)) <= evl[i].warn) { |
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325 tmp = tdelta(&(evl[i].date)); |
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326 size = append(buf, size, tmp); |
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327 size = append(buf, size, ": "); |
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328 size = append(buf, size, evl[i].text); |
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329 free(tmp); |
| 7 | 330 } |
| 331 if (*buf) { | |
| 16 | 332 size = append(buf, size, "."); |
| 333 puts(buf); | |
| 7 | 334 } |
| 335 free(buf); | |
| 336 } | |
| 337 } | |
| 338 | |
| 339 | |
| 340 | |
| 341 | |
| 342 | |
| 343 | |
| 344 | |
| 345 | |
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346 /* |
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347 sort the events by the time before the next time they come up |
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348 */ |
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349 int |
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350 evcmp(const void *p1, const void *p2) |
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351 { |
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352 struct event *e1=(struct event *) p1; |
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353 struct event *e2=(struct event *) p2; |
| 8 | 354 unsigned d1, d2; |
| 7 | 355 |
| 356 d1=delta(&(e1->date)); | |
| 357 d2=delta(&(e2->date)); | |
| 358 | |
| 359 if (d1 < d2) return -1; | |
| 8 | 360 if (d1 > d2) return 1; |
| 7 | 361 return strcmp(e1->text, e2->text); |
| 362 } | |
| 363 | |
| 364 | |
| 365 | |
| 366 | |
| 367 | |
| 368 | |
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369 /* |
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370 difference in days between two dates |
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371 it is assumed that D1 < D2, and so the result is always positive |
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372 */ |
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373 unsigned |
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374 ddiff(struct date *D1, struct date *D2) |
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375 { |
| 8 | 376 struct date d1, d2; |
| 377 int dd, m; | |
| 7 | 378 |
| 379 /* make working copies */ | |
| 8 | 380 d1 = *D1; |
| 381 d2 = *D2; | |
| 7 | 382 |
| 383 /* sort out zero years */ | |
| 384 if (d1.year == 0 || d2.year==0) { | |
| 385 if (d1.year != d2.year) { | |
| 386 if (d1.year == 0) { | |
| 8 | 387 if (before(d1,d2)) |
| 388 d1.year = d2.year; | |
| 389 else | |
| 390 d1.year = d2.year - 1; | |
| 391 } else { | |
| 392 if (before(d1, d2)) | |
| 393 d2.year = d1.year; | |
| 394 else | |
| 395 d2.year = d1.year + 1; | |
| 7 | 396 } |
| 397 } else { /* both years zero */ | |
| 8 | 398 if (before(d1, d2)) |
| 399 d1.year = d2.year = today.year; | |
| 7 | 400 else { |
| 8 | 401 d1.year = today.year; |
| 402 d2.year = d1.year + 1; | |
| 7 | 403 } |
| 404 } | |
| 405 } | |
| 406 | |
| 407 /* now we can actually do the comparison ... */ | |
| 8 | 408 dd = 0; |
| 7 | 409 |
| 410 /* to start with, we work in months */ | |
| 411 for (m=d1.month; m < d2.month + (d2.year-d1.year)*12; m++) | |
| 412 dd += mlen(((m-1)%12)+1, d1.year + m/12); | |
| 413 | |
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414 /* |
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415 and then we renormalise for the days within the months |
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416 the first month was included in our calculations |
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417 */ |
| 7 | 418 dd -= d1.day; |
| 419 /* but the last one wasn't */ | |
| 420 dd += d2.day; | |
| 421 | |
| 422 return dd; | |
| 423 } | |
| 424 | |
| 425 | |
| 426 | |
| 427 | |
| 428 | |
| 429 | |
| 430 | |
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431 |
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432 /* |
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433 actually until the next anniversary of ... |
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434 */ |
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435 unsigned |
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436 delta(struct date *date) |
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437 { |
| 7 | 438 struct date d; |
| 439 unsigned dt, mn; | |
| 440 | |
| 441 memcpy(&d, date, sizeof(struct date)); | |
| 442 | |
| 443 /* past the end of the year */ | |
| 444 if (before(d, today)) { | |
| 445 d.year = 1; | |
| 446 } else { | |
| 447 d.year = 0; | |
| 448 } | |
| 449 | |
| 8 | 450 for (mn = today.month, dt=0; mn < d.month + 12*d.year; mn++) { |
| 7 | 451 dt += mlen(((mn-1)%12) + 1,today.year + mn/12); |
| 8 | 452 } |
| 7 | 453 |
| 454 dt -= today.day; | |
| 455 dt += d.day; | |
| 456 | |
| 457 return dt; | |
| 458 } | |
| 459 | |
| 460 | |
| 461 | |
| 462 | |
| 463 | |
| 464 | |
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465 void |
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466 gettoday(void) |
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467 { |
| 7 | 468 struct tm *tm; |
| 469 time_t t; | |
| 470 | |
| 471 time(&t); | |
| 472 tm = localtime(&t); | |
| 473 today.day = tm->tm_mday; | |
| 474 today.month = tm->tm_mon + 1; /* 1-12 instead of 0-11 */ | |
| 475 today.year = tm->tm_year + 1900; | |
| 476 } | |
| 477 | |
| 478 | |
| 479 | |
| 480 | |
| 481 | |
| 482 | |
| 483 | |
| 484 | |
| 485 | |
| 486 | |
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487 struct event * |
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488 readlist() |
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489 { |
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490 int i, j, k; |
| 7 | 491 struct event *evl; |
| 492 char buf[1024], buf2[1024]; | |
| 16 | 493 char *ptr, *cp; |
| 7 | 494 unsigned flags; |
| 495 | |
| 496 /* initialise */ | |
| 497 gettoday(); | |
| 498 | |
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499 for (i=0, evl=NULL; fgets(buf, sizeof(buf), stdin) != NULL; i++) { |
| 7 | 500 evl = (struct event *) xrealloc(evl, sizeof(struct event) * (i + 1)); |
| 501 | |
| 502 /* ignore comments and empty lines */ | |
| 503 if (*buf == '#' || *buf == '\n') { | |
| 504 i--; | |
| 505 continue; | |
| 506 } | |
| 507 | |
| 508 /* parse string in buf */ | |
| 16 | 509 |
| 510 ptr = strchr(buf, ' '); /* start of text */ | |
| 7 | 511 |
| 512 /* not a valid line, so ignore it! Cool, huh? */ | |
| 513 /* Attention: only recognizes lines without '=' */ | |
| 16 | 514 if (!ptr) { |
| 515 fprintf(stderr, "WARNING: Invalid input line:\n\t%s", buf); | |
| 7 | 516 i--; |
| 517 continue; | |
| 518 } | |
| 519 | |
| 16 | 520 *(ptr++) = '\0'; |
| 521 ptr[strlen(ptr)-1] = '\0'; | |
| 7 | 522 |
| 16 | 523 j = sscanf(buf, "%u-%u-%u", &(evl[i].date.year), |
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524 &(evl[i].date.month), &(evl[i].date.day)); |
| 16 | 525 if (j != 3) { |
| 526 fprintf(stderr, "Error: Invalid date:\t%s\n", buf); | |
| 527 i--; | |
| 528 continue; | |
| 7 | 529 } |
| 530 | |
| 531 /* parse flags */ | |
| 532 | |
| 16 | 533 evl[i].warn = def_warn; |
| 7 | 534 flags = 0; |
| 535 j = 0; | |
| 16 | 536 cp = skptok(ptr); |
| 537 for (cp=ptr; *cp && *cp=='#'; cp=skptok(cp)) { | |
| 538 for (k = 0; FTABLE[k].txt && strncmp(FTABLE[k].txt, cp, strlen(FTABLE[k].txt)); k++) { | |
| 7 | 539 } |
| 540 | |
| 541 switch (FTABLE[k].flag) { | |
| 16 | 542 case F_WTIME_P: /* #w<n> -- sets warning time */ |
| 543 sscanf(cp, "#w%u", &(evl[i].warn)); | |
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544 break; |
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545 case 0: |
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546 break; |
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547 default: |
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548 flags |= FTABLE[k].flag; |
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549 break; |
| 7 | 550 } |
| 551 } | |
| 552 | |
| 553 | |
| 554 /* construct event text */ | |
| 555 | |
| 556 switch(flags & F_MTYPE) { | |
| 557 default: /* assume it's a birthday */ | |
| 16 | 558 if (!evl[i].date.year) { |
| 559 sprintf(buf2, "%s has a birthday", cp); | |
| 560 break; | |
| 7 | 561 } |
| 16 | 562 int tmp_age = ydelta(evl[i].date, today); |
| 563 sprintf(buf2, "%s is %d year%s old", | |
| 564 cp, tmp_age, (tmp_age>1)?"s":""); | |
| 7 | 565 break; |
| 566 case F_TANNIVERSARY: | |
| 16 | 567 if (evl[i].date.year) { |
| 568 sprintf(buf2, "%s %d years ago", | |
| 569 cp, ydelta(evl[i].date, today)); | |
| 7 | 570 } else { |
| 16 | 571 strcpy(buf2, cp); |
| 7 | 572 } |
| 573 break; | |
| 574 } | |
| 575 evl[i].text = strdup(buf2); | |
| 576 } | |
| 577 | |
| 578 evl = (struct event *) xrealloc(evl, sizeof(struct event) * (i + 1)); | |
| 579 evl[i].date.day = 0; | |
| 580 evl[i].date.month = 0; | |
| 581 evl[i].date.year = 0; | |
| 582 evl[i].text = (char *) NULL; | |
| 583 | |
| 584 fclose(stdin); | |
| 585 | |
| 586 /* NB uses i from above */ | |
| 587 qsort(evl, i, sizeof(struct event), evcmp); | |
| 588 return evl; | |
| 589 } | |
| 590 | |
| 591 | |
| 592 | |
| 593 | |
| 594 | |
| 16 | 595 char * |
| 596 skptok(char *ptr) | |
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597 { |
| 16 | 598 while (*ptr && (*ptr!=' ' && *ptr!='\t')) { |
| 599 ptr++; | |
| 600 } | |
| 601 while (*ptr && (*ptr==' ' || *ptr=='\t')) { | |
| 602 ptr++; | |
| 603 } | |
| 604 return ptr; | |
| 7 | 605 } |
| 606 | |
| 607 | |
| 608 | |
| 609 | |
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610 |
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611 |
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612 int |
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613 main(int argc, char *argv[]) |
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614 { |
| 16 | 615 while (--argc > 0 && **++argv == '-') { |
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updated man page; s/-W/-w/
markus schnalke <meillo@marmaro.de>
parents:
16
diff
changeset
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616 if (strcmp(argv[0], "-w") == 0) { |
| 6 | 617 /* TODO: catch if no value given */ |
| 16 | 618 def_warn = atoi((++argv)[0]); |
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0
22b6e71de68e
initial commit; codebase from birthday; just the needed stuff; substituted getopt by own code
meillo@marmaro.de
parents:
diff
changeset
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619 argc--; |
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22b6e71de68e
initial commit; codebase from birthday; just the needed stuff; substituted getopt by own code
meillo@marmaro.de
parents:
diff
changeset
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620 } else { |
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3
dc2f94280b01
new Makefile; removed MinWarn and MaxWarn; adjusted manpage
meillo@marmaro.de
parents:
0
diff
changeset
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621 fprintf(stderr, "unknown option %s\n", argv[0]); |
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0
22b6e71de68e
initial commit; codebase from birthday; just the needed stuff; substituted getopt by own code
meillo@marmaro.de
parents:
diff
changeset
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622 exit(1); |
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22b6e71de68e
initial commit; codebase from birthday; just the needed stuff; substituted getopt by own code
meillo@marmaro.de
parents:
diff
changeset
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623 } |
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22b6e71de68e
initial commit; codebase from birthday; just the needed stuff; substituted getopt by own code
meillo@marmaro.de
parents:
diff
changeset
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624 } |
| 16 | 625 liststrings(readlist()); |
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15
032af48d590b
reformating of the source code
markus schnalke <meillo@marmaro.de>
parents:
14
diff
changeset
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626 return 0; |
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0
22b6e71de68e
initial commit; codebase from birthday; just the needed stuff; substituted getopt by own code
meillo@marmaro.de
parents:
diff
changeset
|
627 } |