2 ** dtimep.lex exceeds the default table capacities for some old versions
3 ** of lex (and the minimum defaults as specified by POSIX). The following
4 ** choices meet or exceed the lex defaults for older SunOS4.x, Solaris,
16 ** Since we're looking at a string at a time, don't worry about
17 ** wrapping to the next buffer.
20 #define YY_SKIP_YYWRAP
25 ** This is the tricky thing that makes this function cool. We
26 ** replace the traditional int yylex(void) declaration with our
27 ** dparsetime() declaration, essentially piggy-backing off the
28 ** utility of the yylex() function and adding what we need to make
29 ** the parsing function useful to us.
31 #define YY_DECL struct tws *dparsetime(char *lexstr)
34 ** yyerminate() is called after the input string is matched to
35 ** completion (actually, when the lexer reaches an EOF). The only
36 ** thing that really needs to be in this macro function is the
37 ** return call, which must be substituted inline into dparsetime.
40 #define yyterminate() (void)yy_delete_buffer(lexhandle); \
41 if(!(tw.tw_flags & TW_SUCC)) { \
42 return (struct tws *)NULL; \
44 if(tw.tw_year < 1970) \
46 if(tw.tw_year < 1970) \
51 ** Patchable flag that says how to interpret NN/NN/NN dates. When
52 ** true, we do it European style: DD/MM/YY. When false, we do it
53 ** American style: MM/DD/YY. Of course, these are all non-RFC822
59 ** Table to convert month names to numeric month. We use the
60 ** fact that the low order 5 bits of the sum of the 2nd & 3rd
61 ** characters of the name is a hash with no collisions for the 12
62 ** valid month names. (The mask to 5 bits maps any combination of
63 ** upper and lower case into the same hash value).
65 static int month_map[] = {
98 ** Lookup table for day-of-week using the same hash trick as for above
99 ** name-of-month table, but using the first and second character, not
102 ** Compute index into table using: (day_name[0] & 7) + (day_name[1] & 4)
104 static int day_map[] = {
120 ** The SET* macros will parse for the appropriate field, and leave the
121 ** cp pointer at the first character after the desired field. Be
122 ** careful with variable-length fields or alpha-num mixes.
124 ** The SKIP* macros skip over characters of a particular class and
125 ** leave cp at the position of the first character that doesn't match
126 ** that class. Correspondingly, SKIPTO* skips until it reaches a
127 ** character of a particular class.
130 #define INIT() { cp = yytext;}
131 #define SETWDAY() { tw.tw_wday= day_map[(cp[0] & 7) + (cp[1] & 4)]; \
132 tw.tw_flags &= ~TW_SDAY; tw.tw_flags |= TW_SEXP; SKIPA(); }
133 #define SETMON() { cp++; tw.tw_mon = month_map[(cp[0] + cp[1]) & 0x1f]; \
135 #define SETMON_NUM() { tw.tw_mon = atoi(cp)-1; SKIPD(); }
136 #define SETYEAR() { tw.tw_year = atoi(cp); SKIPD(); }
137 #define SETDAY() { tw.tw_mday = atoi(cp); tw.tw_flags |= TW_YES; SKIPD(); }
138 #define SETTIME() { tw.tw_hour = atoi(cp); cp += 2; SKIPTOD(); \
139 tw.tw_min = atoi(cp); cp += 2; if(*cp == ':') { \
140 tw.tw_sec = atoi(++cp); SKIPD(); } }
141 #define SETZONE(x) { tw.tw_zone = ((x)/100)*60+(x)%100; \
142 tw.tw_flags |= TW_SZEXP; SKIPD(); }
143 #define SETDST() { tw.tw_flags |= TW_DST; }
144 #define SKIPD() { while ( isdigit(*cp++) ) ; --cp; }
145 #define SKIPTOD() { while ( !isdigit(*cp++) ) ; --cp; }
146 #define SKIPA() { while ( isalpha(*cp++) ) ; --cp; }
147 #define SKIPTOA() { while ( !isalpha(*cp++) ) ; --cp; }
148 #define SKIPSP() { while ( isspace(*cp++) ) ; --cp; }
149 #define SKIPTOSP() { while ( !isspace(*cp++) ) ; --cp; }
151 #ifdef ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST
152 # ifdef HAVE_SYS_TIME_H
153 # include <sys/time.h>
158 zonehack (struct tws *tw)
160 register struct tm *tm;
162 if (dmktime (tw) == (time_t) -1)
165 tm = localtime (&tw->tw_clock);
167 tw->tw_flags |= TW_DST;
171 #endif /* ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST */
177 wed ([Ww]ed(nesday)?)
182 DAY ({sun}|{mon}|{tue}|{wed}|{thu}|{fri}|{sat})
192 sep ([Ss]ep(tember)?)
197 MONTH ({jan}|{feb}|{mar}|{apr}|{may}|{jun}|{jul}|{aug}|{sep}|{oct}|{nov}|{dec})
199 TIME ({D}:{d}{d}(:{d}{d})?)
202 ** The year can either be 2 digits, or 4. However, after
203 ** Y2K, we found that some MUA were reporting the year 100, hence
204 ** the middle term here. yyterminate() resolves the actual
205 ** issues with 2-digit years.
208 YEAR (({d}{d})|(1{d}{d})|({d}{4}))
219 ** This section begins the definition of dparsetime().
220 ** Put here any local variable definitions and initializations
222 YY_BUFFER_STATE lexhandle;
224 register unsigned char *cp;
225 static struct tws tw;
227 memset(&tw,0,sizeof(struct tws));
229 lexhandle = yy_scan_string(lexstr);
232 {DAY}","?{W}{MONTH}{W}{D}{W}{TIME}{W}{YEAR} {
245 {DAY}","?{W}{D}{W}{MONTH}{W}{YEAR}{W}{TIME} {
257 {D}{W}{MONTH}{W}{YEAR}{W}{TIME} {
267 {DAY}","?{W}{MONTH}{W}{D}","?{W}{YEAR}","?{W}{TIME} {
279 {DAY}","?{W}{MONTH}{W}{D}","?{W}{YEAR} {
289 {MONTH}{W}{D}","?{W}{YEAR}","?{W}{DAY} {
299 {MONTH}{W}{D}","?{W}{YEAR} {
307 {D}("-"|"/"){D}("-"|"/"){YEAR}{W}{TIME} {
325 {D}("-"|"/"){D}("-"|"/"){YEAR} {
343 "[Pp][Mm]" tw.tw_hour += 12;
349 #ifdef ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST
351 #endif /* ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST */
358 #ifdef ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST
360 #endif /* ADJUST_NUMERIC_ONLY_TZ_OFFSETS_WRT_DST */
364 {nl}("ut"|"UT") INIT(); SETZONE(0); yyterminate();
365 {nl}("gmt"|"GMT") INIT(); SETZONE(0); yyterminate();
366 {nl}("est"|"EST") INIT(); SETZONE(-500); yyterminate();
367 {nl}("edt"|"EDT") { INIT(); SETDST(); SETZONE(-500); yyterminate(); }
368 {nl}("cst"|"CST") INIT(); SETZONE(-600); yyterminate();
369 {nl}("cdt"|"CDT") { INIT(); SETDST(); SETZONE(-600); yyterminate(); }
370 {nl}("mst"|"MST") INIT(); SETZONE(-700); yyterminate();
371 {nl}("mdt"|"MDT") { INIT(); SETDST(); SETZONE(-700); yyterminate(); }
372 {nl}("pst"|"PST") INIT(); SETZONE(-800); yyterminate();
373 {nl}("pdt"|"PDT") { INIT(); SETDST(); SETZONE(-800); yyterminate(); }
374 {nl}("nst"|"NST") INIT(); SETZONE(-330); yyterminate();
375 {nl}("ast"|"AST") INIT(); SETZONE(-400); yyterminate();
376 {nl}("adt"|"ADT") { INIT(); SETDST(); SETZONE(-400); yyterminate(); }
377 {nl}("hst"|"HST") INIT(); SETZONE(-1000); yyterminate();
378 {nl}("hdt"|"HDT") { INIT(); SETDST(); SETZONE(-1000); yyterminate(); }
383 ** This is a portable way to squash a warning about the yyunput()
384 ** function being static but never used. It costs us a tiny amount
385 ** of extra code in the binary but the other options are:
386 ** "%option nounput" which is flex-specific
387 ** makefile hackery just to compile dtimep.c with different flags
389 void dtimep_yyunput(int c)