/*** *strftime.c - String Format Time * * Copyright (c) 1988-1997, Microsoft Corporation. All rights reserved. * *Purpose: * *******************************************************************************/ #ifdef _MAC #define _WLM_NOFORCE_LIBS #include #ifdef _WIN32 #undef _WIN32 /* windows.h should NOT set _WIN32 */ #endif /* _WIN32 */ /* The following two TYPEDEFs are NOT defined in for the Mac */ typedef DWORD LCTYPE; /* from windows.h */ typedef int mbstate_t; /* from wchar.h */ #endif /* _MAC */ #include #include #include #include #include #include #include #include #include #include /* Prototypes for local routines */ static void __cdecl _expandtime (char specifier, const struct tm *tmptr, char **out, size_t *count, struct __lc_time_data *lc_time); static void __cdecl _store_str (char *in, char **out, size_t *count); static void __cdecl _store_num (int num, int digits, char **out, size_t *count); static void __cdecl _store_number (int num, char **out, size_t *count); static void __cdecl _store_winword (const char *format, const struct tm *tmptr, char **out, size_t *count, struct __lc_time_data *lc_time); /* LC_TIME data for local "C" */ __declspec(selectany) struct __lc_time_data __lc_time_c = { {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}, {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", }, {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}, {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"}, {"AM", "PM"} , { "M/d/yy" } , { "dddd, MMMM dd, yyyy" } , { "H:mm:ss" } }; /* Pointer to the current LC_TIME data structure. */ struct __lc_time_data *__lc_time_curr = &__lc_time_c; /* Flags */ unsigned __alternate_form; unsigned __no_lead_zeros; #define TIME_SEP ':' /* get a copy of the current day names */ char * __cdecl _Getdays ( void ) { const struct __lc_time_data *pt = __lc_time_curr; size_t n, len = 0; char *p; for (n = 0; n < 7; ++n) len += strlen(pt->wday_abbr[n]) + strlen(pt->wday[n]) + 2; p = (char *)malloc(len + 1); if (p != 0) { char *s = p; for (n = 0; n < 7; ++n) { *s++ = TIME_SEP; s += strlen(strcpy(s, pt->wday_abbr[n])); *s++ = TIME_SEP; s += strlen(strcpy(s, pt->wday[n])); } *s++ = '\0'; } return (p); } /* get a copy of the current month names */ char * __cdecl _Getmonths ( void ) { const struct __lc_time_data *pt = __lc_time_curr; size_t n, len = 0; char *p; for (n = 0; n < 12; ++n) len += strlen(pt->month_abbr[n]) + strlen(pt->month[n]) + 2; p = (char *)malloc(len + 1); if (p != 0) { char *s = p; for (n = 0; n < 12; ++n) { *s++ = TIME_SEP; s += strlen(strcpy(s, pt->month_abbr[n])); *s++ = TIME_SEP; s += strlen(strcpy(s, pt->month[n])); } *s++ = '\0'; } return (p); } /* get a copy of the current time locale information */ void * __cdecl _Gettnames ( void ) { const struct __lc_time_data *pt = __lc_time_curr; size_t n, len = 0; void *p; for (n = 0; n < 7; ++n) len += strlen(pt->wday_abbr[n]) + strlen(pt->wday[n]) + 2; for (n = 0; n < 12; ++n) len += strlen(pt->month_abbr[n]) + strlen(pt->month[n]) + 2; len += strlen(pt->ampm[0]) + strlen(pt->ampm[1]) + 2; len += strlen(pt->ww_sdatefmt) + 1; len += strlen(pt->ww_ldatefmt) + 1; len += strlen(pt->ww_timefmt) + 1; p = malloc(sizeof (*pt) + len); if (p != 0) {struct __lc_time_data *pn = (struct __lc_time_data *)p; char *s = (char *)p + sizeof (*pt); memcpy(p, __lc_time_curr, sizeof (*pt)); for (n = 0; n < 7; ++n) {pn->wday_abbr[n] = s; s += strlen(strcpy(s, pt->wday_abbr[n])) + 1; pn->wday[n] = s; s += strlen(strcpy(s, pt->wday[n])) + 1; } for (n = 0; n < 12; ++n) {pn->month_abbr[n] = s; s += strlen(strcpy(s, pt->month_abbr[n])) + 1; pn->month[n] = s; s += strlen(strcpy(s, pt->month[n])) + 1; } pn->ampm[0] = s; s += strlen(strcpy(s, pt->ampm[0])) + 1; pn->ampm[1] = s; s += strlen(strcpy(s, pt->ampm[1])) + 1; pn->ww_sdatefmt = s; s += strlen(strcpy(s, pt->ww_sdatefmt)) + 1; pn->ww_ldatefmt = s; s += strlen(strcpy(s, pt->ww_ldatefmt)) + 1; pn->ww_timefmt = s; } return (p); } /*** *size_t strftime(string, maxsize, format, timeptr) - Format a time string * *Purpose: * Place characters into the user's output buffer expanding time * format directives as described in the user's control string. * Use the supplied 'tm' structure for time data when expanding * the format directives. * [ANSI] * *Entry: * char *string = pointer to output string * size_t maxsize = max length of string * const char *format = format control string * const struct tm *timeptr = pointer to tb data structure * *Exit: * !0 = If the total number of resulting characters including the * terminating null is not more than 'maxsize', then return the * number of chars placed in the 'string' array (not including the * null terminator). * * 0 = Otherwise, return 0 and the contents of the string are * indeterminate. * *Exceptions: * *******************************************************************************/ size_t __cdecl strftime ( char *string, size_t maxsize, const char *format, const struct tm *timeptr ) { return (_Strftime(string, maxsize, format, timeptr, 0)); } /*** *size_t _Strftime(string, maxsize, format, * timeptr, lc_time) - Format a time string for a given locale * *Purpose: * Place characters into the user's output buffer expanding time * format directives as described in the user's control string. * Use the supplied 'tm' structure for time data when expanding * the format directives. use the locale information at lc_time. * [ANSI] * *Entry: * char *string = pointer to output string * size_t maxsize = max length of string * const char *format = format control string * const struct tm *timeptr = pointer to tb data structure * struct __lc_time_data *lc_time = pointer to locale-specific info * (passed as void * to avoid type mismatch with C++) * *Exit: * !0 = If the total number of resulting characters including the * terminating null is not more than 'maxsize', then return the * number of chars placed in the 'string' array (not including the * null terminator). * * 0 = Otherwise, return 0 and the contents of the string are * indeterminate. * *Exceptions: * *******************************************************************************/ size_t __cdecl _Strftime ( char *string, size_t maxsize, const char *format, const struct tm *timeptr, void *lc_time_arg ) { struct __lc_time_data *lc_time = lc_time_arg == 0 ? __lc_time_curr : (struct __lc_time_data *)lc_time_arg; size_t left; /* space left in output string */ #ifdef _MT int local_lock_flag; #endif /* _MT */ /* Copy maxsize into temp. */ left = maxsize; _lock_locale( local_lock_flag ) /* Copy the input string to the output string expanding the format designations appropriately. Stop copying when one of the following is true: (1) we hit a null char in the input stream, or (2) there's no room left in the output stream. */ while (left > 0) { switch(*format) { case('\0'): /* end of format input string */ goto done; case('%'): /* Format directive. Take appropriate action based on format control character. */ format++; /* skip over % char */ /* process flags */ __alternate_form = 0; if (*format == '#') { __alternate_form = 1; format++; } _expandtime(*format, timeptr, &string, &left, lc_time); format++; /* skip format char */ break; default: /* store character, bump pointers, dec the char count */ if (isleadbyte((int)(*format)) && left > 1) { *string++ = *format++; left--; } *string++ = *format++; left--; break; } } /* All done. See if we terminated because we hit a null char or because we ran out of space */ done: _unlock_locale( local_lock_flag ) if (left > 0) { /* Store a terminating null char and return the number of chars we stored in the output string. */ *string = '\0'; return(maxsize-left); } else return(0); } /*** *_expandtime() - Expand the conversion specifier * *Purpose: * Expand the given strftime conversion specifier using the time struct * and store it in the supplied buffer. * * The expansion is locale-dependent. * * *** For internal use with strftime() only *** * *Entry: * char specifier = strftime conversion specifier to expand * const struct tm *tmptr = pointer to time/date structure * char **string = address of pointer to output string * size_t *count = address of char count (space in output area) * struct __lc_time_data *lc_time = pointer to locale-specific info * *Exit: * none * *Exceptions: * *******************************************************************************/ static void __cdecl _expandtime ( char specifier, const struct tm *timeptr, char **string, size_t *left, struct __lc_time_data *lc_time ) { unsigned temp; /* temps */ int wdaytemp; /* Use a copy of the appropriate __lc_time_data pointer. This should prevent the necessity of locking/unlocking in mthread code (if we can guarantee that the various __lc_time data structures are always in the same segment). contents of time strings structure can now change, so thus we do use locking */ switch(specifier) { /* switch on specifier */ case('a'): /* abbreviated weekday name */ _store_str((char *)(lc_time->wday_abbr[timeptr->tm_wday]), string, left); break; case('A'): /* full weekday name */ _store_str((char *)(lc_time->wday[timeptr->tm_wday]), string, left); break; case('b'): /* abbreviated month name */ _store_str((char *)(lc_time->month_abbr[timeptr->tm_mon]), string, left); break; case('B'): /* full month name */ _store_str((char *)(lc_time->month[timeptr->tm_mon]), string, left); break; case('c'): /* date and time display */ if (__alternate_form) { __alternate_form = FALSE; _store_winword(lc_time->ww_ldatefmt, timeptr, string, left, lc_time); if (*left == 0) return; *(*string)++=' '; (*left)--; _store_winword(lc_time->ww_timefmt, timeptr, string, left, lc_time); } else { _store_winword(lc_time->ww_sdatefmt, timeptr, string, left, lc_time); if (*left == 0) return; *(*string)++=' '; (*left)--; _store_winword(lc_time->ww_timefmt, timeptr, string, left, lc_time); } break; case('d'): /* mday in decimal (01-31) */ __no_lead_zeros = __alternate_form; _store_num(timeptr->tm_mday, 2, string, left); break; case('H'): /* 24-hour decimal (00-23) */ __no_lead_zeros = __alternate_form; _store_num(timeptr->tm_hour, 2, string, left); break; case('I'): /* 12-hour decimal (01-12) */ __no_lead_zeros = __alternate_form; if (!(temp = timeptr->tm_hour%12)) temp=12; _store_num(temp, 2, string, left); break; case('j'): /* yday in decimal (001-366) */ __no_lead_zeros = __alternate_form; _store_num(timeptr->tm_yday+1, 3, string, left); break; case('m'): /* month in decimal (01-12) */ __no_lead_zeros = __alternate_form; _store_num(timeptr->tm_mon+1, 2, string, left); break; case('M'): /* minute in decimal (00-59) */ __no_lead_zeros = __alternate_form; _store_num(timeptr->tm_min, 2, string, left); break; case('p'): /* AM/PM designation */ if (timeptr->tm_hour <= 11) _store_str((char *)(lc_time->ampm[0]), string, left); else _store_str((char *)(lc_time->ampm[1]), string, left); break; case('S'): /* secs in decimal (00-59) */ __no_lead_zeros = __alternate_form; _store_num(timeptr->tm_sec, 2, string, left); break; case('U'): /* sunday week number (00-53) */ __no_lead_zeros = __alternate_form; wdaytemp = timeptr->tm_wday; goto weeknum; /* join common code */ case('w'): /* week day in decimal (0-6) */ __no_lead_zeros = __alternate_form; _store_num(timeptr->tm_wday, 1, string, left); break; case('W'): /* monday week number (00-53) */ __no_lead_zeros = __alternate_form; if (timeptr->tm_wday == 0) /* monday based */ wdaytemp = 6; else wdaytemp = timeptr->tm_wday-1; weeknum: if (timeptr->tm_yday < wdaytemp) temp=0; else { temp = timeptr->tm_yday/7; if ((timeptr->tm_yday%7) >= wdaytemp) temp++; } _store_num(temp, 2, string, left); break; case('x'): /* date display */ if (__alternate_form) { __alternate_form = FALSE; _store_winword(lc_time->ww_ldatefmt, timeptr, string, left, lc_time); } else { _store_winword(lc_time->ww_sdatefmt, timeptr, string, left, lc_time); } break; case('X'): /* time display */ __alternate_form = FALSE; _store_winword(lc_time->ww_timefmt, timeptr, string, left, lc_time); break; case('y'): /* year w/o century (00-99) */ __no_lead_zeros = __alternate_form; temp = timeptr->tm_year%100; _store_num(temp, 2, string, left); break; case('Y'): /* year w/ century */ __no_lead_zeros = __alternate_form; temp = (((timeptr->tm_year/100)+19)*100) + (timeptr->tm_year%100); _store_num(temp, 4, string, left); break; case('Z'): /* time zone name, if any */ case('z'): /* time zone name, if any */ #ifdef _MAC _tzset(); /* Set time zone info */ #else /* _MAC */ __tzset(); /* Set time zone info */ #endif /* _MAC */ _store_str(_tzname[((timeptr->tm_isdst)?1:0)], string, left); break; case('%'): /* percent sign */ *(*string)++ = '%'; (*left)--; break; default: /* unknown format directive */ /* ignore the directive and continue */ /* [ANSI: Behavior is undefined.] */ break; } /* end % switch */ } /*** *_store_str() - Copy a time string * *Purpose: * Copy the supplied time string into the output string until * (1) we hit a null in the time string, or (2) the given count * goes to 0. * * *** For internal use with strftime() only *** * *Entry: * char *in = pointer to null terminated time string * char **out = address of pointer to output string * size_t *count = address of char count (space in output area) * *Exit: * none *Exceptions: * *******************************************************************************/ static void __cdecl _store_str ( char *in, char **out, size_t *count ) { while ((*count != 0) && (*in != '\0')) { *(*out)++ = *in++; (*count)--; } } /*** *_store_num() - Convert a number to ascii and copy it * *Purpose: * Convert the supplied number to decimal and store * in the output buffer. Update both the count and * buffer pointers. * * *** For internal use with strftime() only *** * *Entry: * int num = pointer to integer value * int digits = # of ascii digits to put into string * char **out = address of pointer to output string * size_t *count = address of char count (space in output area) * *Exit: * none *Exceptions: * *******************************************************************************/ static void __cdecl _store_num ( int num, int digits, char **out, size_t *count ) { int temp=0; if (__no_lead_zeros) { _store_number (num, out, count); return; } if ((size_t)digits < *count) { for (digits--; (digits+1); digits--) { (*out)[digits] = (char)('0' + num % 10); num /= 10; temp++; } *out += temp; *count -= temp; } else *count = 0; } /*** *_store_number() - Convert positive integer to string * *Purpose: * Convert positive integer to a string and store it in the output * buffer with no null terminator. Update both the count and * buffer pointers. * * Differs from _store_num in that the precision is not specified, * and no leading zeros are added. * * *** For internal use with strftime() only *** * * Created from xtoi.c * *Entry: * int num = pointer to integer value * char **out = address of pointer to output string * size_t *count = address of char count (space in output area) * *Exit: * none * *Exceptions: * The buffer is filled until it is out of space. There is no * way to tell beforehand (as in _store_num) if the buffer will * run out of space. * *******************************************************************************/ static void __cdecl _store_number ( int num, char **out, size_t *count ) { char *p; /* pointer to traverse string */ char *firstdig; /* pointer to first digit */ char temp; /* temp char */ p = *out; /* put the digits in the buffer in reverse order */ if (*count > 1) { do { *p++ = (char) (num % 10 + '0'); (*count)--; } while ((num/=10) > 0 && *count > 1); } firstdig = *out; /* firstdig points to first digit */ *out = p; /* return pointer to next space */ p--; /* p points to last digit */ /* reverse the buffer */ do { temp = *p; *p-- = *firstdig; *firstdig++ = temp; /* swap *p and *firstdig */ } while (firstdig < p); /* repeat until halfway */ } /*** *_store_winword() - Store date/time in WinWord format * *Purpose: * Format the date/time in the supplied WinWord format * and store it in the supplied buffer. * * *** For internal use with strftime() only *** * * The WinWord format is converted token by token to * strftime conversion specifiers. _expandtime is then called to * do the work. The WinWord format is expected to be a * character string (not wide-chars). * *Entry: * const char **format = address of pointer to WinWord format * const struct tm *tmptr = pointer to time/date structure * char **out = address of pointer to output string * size_t *count = address of char count (space in output area) * struct __lc_time_data *lc_time = pointer to locale-specific info * *Exit: * none * *Exceptions: * *******************************************************************************/ static void __cdecl _store_winword ( const char *format, const struct tm *tmptr, char **out, size_t *count, struct __lc_time_data *lc_time ) { char specifier; const char *p; int repeat; char *ampmstr; while (*format && *count != 0) { specifier = 0; /* indicate no match */ __no_lead_zeros = 0; /* default is print leading zeros */ /* count the number of repetitions of this character */ for (repeat=0, p=format; *p++ == *format; repeat++); /* leave p pointing to the beginning of the next token */ p--; /* switch on ascii format character and determine specifier */ switch (*format) { case 'M': switch (repeat) { case 1: __no_lead_zeros = 1; /* fall thru */ case 2: specifier = 'm'; break; case 3: specifier = 'b'; break; case 4: specifier = 'B'; break; } break; case 'd': switch (repeat) { case 1: __no_lead_zeros = 1; /* fall thru */ case 2: specifier = 'd'; break; case 3: specifier = 'a'; break; case 4: specifier = 'A'; break; } break; case 'y': switch (repeat) { case 2: specifier = 'y'; break; case 4: specifier = 'Y'; break; } break; case 'h': switch (repeat) { case 1: __no_lead_zeros = 1; /* fall thru */ case 2: specifier = 'I'; break; } break; case 'H': switch (repeat) { case 1: __no_lead_zeros = 1; /* fall thru */ case 2: specifier = 'H'; break; } break; case 'm': switch (repeat) { case 1: __no_lead_zeros = 1; /* fall thru */ case 2: specifier = 'M'; break; } break; case 's': /* for compatibility; not strictly WinWord */ switch (repeat) { case 1: __no_lead_zeros = 1; /* fall thru */ case 2: specifier = 'S'; break; } break; case 'A': case 'a': if (!_stricmp(format, "am/pm")) p = format + 5; else if (!_stricmp(format, "a/p")) p = format + 3; specifier = 'p'; break; case 't': /* t or tt time marker suffix */ if ( tmptr->tm_hour <= 11 ) ampmstr = lc_time->ampm[0]; else ampmstr = lc_time->ampm[1]; while ( (repeat > 0) && (*count > 0) ) { if ( isleadbyte((int)*ampmstr) && (*count > 1) ) { *(*out)++ = *ampmstr++; (*count)--; } *(*out)++ = *ampmstr++; (*count)--; repeat--; } format = p; continue; case '\'': /* literal string */ if (repeat & 1) /* odd number */ { format += repeat; while (*format && *count != 0) { if (*format == '\'') { format++; break; } if ( isleadbyte((int)*format) && (*count > 1) ) { *(*out)++ = *format++; (*count)--; } *(*out)++ = *format++; (*count)--; } } else { /* even number */ format += repeat; } continue; default: /* non-control char, print it */ break; } /* switch */ /* expand specifier, or copy literal if specifier not found */ if (specifier) { _expandtime(specifier, tmptr, out, count, lc_time); format = p; /* bump format up to the next token */ } else { if (isleadbyte((int)*format)) { *(*out)++ = *format++; (*count)--; } *(*out)++ = *format++; (*count)--; } } /* while */ }