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add strptime for windows
This commit is contained in:
ruanshudong
parent
9db3eaeba3
commit
5eb4d1b675
11
third_partly/util/include/util/tc_strptime.h
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11
third_partly/util/include/util/tc_strptime.h
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@ -0,0 +1,11 @@
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#ifndef __TC_STRPTIME_H__
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#define __TC_STRPTIME_H__
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#ifdef TARGET_PLATFORM_WINDOWS
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char * strptime(const char *buf, const char *fmt, struct tm *tm);
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#endif
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#endif
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559
third_partly/util/src/tc_strptime.cpp
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559
third_partly/util/src/tc_strptime.cpp
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@ -0,0 +1,559 @@
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#include "util/tc_platform.h"
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#include "util/tc_strptime.h"
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#ifdef TARGET_PLATFORM_WINDOWS
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void get_locale_strings(void);
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/* XXX This version of the implementation is not really complete.
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Some of the fields cannot add information alone. But if seeing
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some of them in the same format (such as year, week and weekday)
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this is enough information for determining the date. */
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#include <ctype.h>
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#include <limits.h>
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#include <string.h>
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#include <time.h>
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#define match_char(ch1, ch2) if (ch1 != ch2) return NULL
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#ifdef _MSC_VER
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#ifndef strcasecmp
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#define strcasecmp _stricmp
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#endif
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#ifndef strncasecmp
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#define strncasecmp _strnicmp
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#endif
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#endif
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#ifndef Macintosh
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#if defined __GNUC__ && __GNUC__ >= 2
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# define match_string(cs1, s2) \
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({ size_t len = strlen (cs1); \
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int result = strncasecmp ((cs1), (s2), len) == 0; \
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if (result) (s2) += len; \
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result; })
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#else
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/* Oh come on. Get a reasonable compiler. */
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# define match_string(cs1, s2) \
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(strncasecmp ((cs1), (s2), strlen (cs1)) ? 0 : ((s2) += strlen (cs1), 1))
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#endif
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#else
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# define match_string(cs1, s2) \
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(strncmp ((cs1), (s2), strlen (cs1)) ? 0 : ((s2) += strlen (cs1), 1))
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#endif /* mac */
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/* We intentionally do not use isdigit() for testing because this will
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lead to problems with the wide character version. */
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#define get_number(from, to, n) \
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do { \
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int __n = n; \
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val = 0; \
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while (*rp == ' ') \
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++rp; \
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if (*rp < '0' || *rp > '9') \
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return NULL; \
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do { \
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val *= 10; \
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val += *rp++ - '0'; \
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} while (--__n > 0 && val * 10 <= to && *rp >= '0' && *rp <= '9'); \
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if (val < from || val > to) \
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return NULL; \
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} while (0)
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# define get_alt_number(from, to, n) \
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/* We don't have the alternate representation. */ \
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get_number(from, to, n)
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#define recursive(new_fmt) \
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(*(new_fmt) != '\0' \
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&& (rp = strptime_internal (rp, (new_fmt), tm, decided)) != NULL)
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/* This version: may overwrite these with versions for the locale */
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static char weekday_name[][20] =
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{
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"Sunday", "Monday", "Tuesday", "Wednesday",
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"Thursday", "Friday", "Saturday"
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};
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static char ab_weekday_name[][10] =
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{
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
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};
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static char month_name[][20] =
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{
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"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"
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};
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static char ab_month_name[][10] =
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{
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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};
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static char am_pm[][4] = { "AM", "PM" };
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# define HERE_D_T_FMT "%a %b %e %H:%M:%S %Y"
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# define HERE_D_FMT "%y/%m/%d"
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# define HERE_T_FMT_AMPM "%I:%M:%S %p"
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# define HERE_T_FMT "%H:%M:%S"
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static const unsigned short int __mon_yday[2][13] =
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{
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/* Normal years. */
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{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
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/* Leap years. */
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{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
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};
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/* Status of lookup: do we use the locale data or the raw data? */
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enum locale_status { not, loc, raw };
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# define __isleap(year) \
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((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
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/* Compute the day of the week. */
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void
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day_of_the_week(struct tm *tm)
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{
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/* We know that January 1st 1970 was a Thursday (= 4). Compute the
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the difference between this data in the one on TM and so determine
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the weekday. */
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int corr_year = 1900 + tm->tm_year - (tm->tm_mon < 2);
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int wday = (-473
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+ (365 * (tm->tm_year - 70))
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+ (corr_year / 4)
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- ((corr_year / 4) / 25) + ((corr_year / 4) % 25 < 0)
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+ (((corr_year / 4) / 25) / 4)
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+ __mon_yday[0][tm->tm_mon]
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+ tm->tm_mday - 1);
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tm->tm_wday = ((wday % 7) + 7) % 7;
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}
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/* Compute the day of the year. */
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void
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day_of_the_year(struct tm *tm)
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{
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tm->tm_yday = (__mon_yday[__isleap(1900 + tm->tm_year)][tm->tm_mon]
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+ (tm->tm_mday - 1));
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}
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char *
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strptime_internal(const char *rp, const char *fmt, struct tm *tm,
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enum locale_status *decided)
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{
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const char *rp_backup;
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int cnt;
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size_t val;
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int have_I, is_pm;
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int century, want_century;
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int have_wday, want_xday;
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int have_yday;
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int have_mon, have_mday;
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have_I = is_pm = 0;
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century = -1;
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want_century = 0;
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have_wday = want_xday = have_yday = have_mon = have_mday = 0;
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while (*fmt != '\0')
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{
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/* A white space in the format string matches 0 more or white
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space in the input string. */
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if (isspace(*fmt))
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{
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while (isspace(*rp))
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++rp;
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++fmt;
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continue;
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}
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/* Any character but `%' must be matched by the same character
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in the iput string. */
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if (*fmt != '%')
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{
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match_char(*fmt++, *rp++);
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continue;
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}
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++fmt;
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/* We need this for handling the `E' modifier. */
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start_over:
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/* Make back up of current processing pointer. */
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rp_backup = rp;
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switch (*fmt++)
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{
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case '%':
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/* Match the `%' character itself. */
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match_char('%', *rp++);
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break;
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case 'a':
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case 'A':
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/* Match day of week. */
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for (cnt = 0; cnt < 7; ++cnt)
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{
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if (*decided != loc
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&& (match_string(weekday_name[cnt], rp)
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|| match_string(ab_weekday_name[cnt], rp)))
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{
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*decided = raw;
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break;
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}
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}
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if (cnt == 7)
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/* Does not match a weekday name. */
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return NULL;
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tm->tm_wday = cnt;
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have_wday = 1;
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break;
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case 'b':
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case 'B':
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case 'h':
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/* Match month name. */
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for (cnt = 0; cnt < 12; ++cnt)
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{
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if (match_string(month_name[cnt], rp)
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|| match_string(ab_month_name[cnt], rp))
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{
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*decided = raw;
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break;
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}
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}
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if (cnt == 12)
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/* Does not match a month name. */
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return NULL;
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tm->tm_mon = cnt;
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want_xday = 1;
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break;
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case 'c':
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/* Match locale's date and time format. */
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if (!recursive(HERE_T_FMT_AMPM))
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return NULL;
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break;
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case 'C':
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/* Match century number. */
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get_number(0, 99, 2);
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century = val;
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want_xday = 1;
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break;
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case 'd':
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case 'e':
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/* Match day of month. */
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get_number(1, 31, 2);
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tm->tm_mday = val;
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have_mday = 1;
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want_xday = 1;
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break;
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case 'F':
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if (!recursive("%Y-%m-%d"))
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return NULL;
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want_xday = 1;
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break;
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case 'x':
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/* Fall through. */
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case 'D':
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/* Match standard day format. */
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if (!recursive(HERE_D_FMT))
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return NULL;
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want_xday = 1;
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break;
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case 'k':
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case 'H':
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/* Match hour in 24-hour clock. */
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get_number(0, 23, 2);
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tm->tm_hour = val;
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have_I = 0;
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break;
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case 'I':
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/* Match hour in 12-hour clock. */
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get_number(1, 12, 2);
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tm->tm_hour = val % 12;
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have_I = 1;
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break;
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case 'j':
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/* Match day number of year. */
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get_number(1, 366, 3);
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tm->tm_yday = val - 1;
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have_yday = 1;
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break;
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case 'm':
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/* Match number of month. */
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get_number(1, 12, 2);
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tm->tm_mon = val - 1;
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have_mon = 1;
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want_xday = 1;
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break;
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case 'M':
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/* Match minute. */
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get_number(0, 59, 2);
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tm->tm_min = val;
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break;
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case 'n':
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case 't':
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/* Match any white space. */
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while (isspace(*rp))
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++rp;
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break;
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case 'p':
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/* Match locale's equivalent of AM/PM. */
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if (!match_string(am_pm[0], rp))
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if (match_string(am_pm[1], rp))
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is_pm = 1;
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else
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return NULL;
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break;
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case 'r':
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if (!recursive(HERE_T_FMT_AMPM))
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return NULL;
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break;
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case 'R':
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if (!recursive("%H:%M"))
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return NULL;
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break;
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case 's':
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{
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/* The number of seconds may be very high so we cannot use
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the `get_number' macro. Instead read the number
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character for character and construct the result while
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doing this. */
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time_t secs = 0;
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if (*rp < '0' || *rp > '9')
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/* We need at least one digit. */
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return NULL;
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do
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{
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secs *= 10;
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secs += *rp++ - '0';
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} while (*rp >= '0' && *rp <= '9');
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if ((gmtime_s(tm, &secs)) == 0)
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/* Error in function. */
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return NULL;
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}
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break;
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case 'S':
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get_number(0, 61, 2);
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tm->tm_sec = val;
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break;
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case 'X':
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/* Fall through. */
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case 'T':
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if (!recursive(HERE_T_FMT))
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return NULL;
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break;
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case 'u':
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get_number(1, 7, 1);
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tm->tm_wday = val % 7;
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have_wday = 1;
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break;
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case 'g':
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get_number(0, 99, 2);
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/* XXX This cannot determine any field in TM. */
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break;
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case 'G':
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if (*rp < '0' || *rp > '9')
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return NULL;
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/* XXX Ignore the number since we would need some more
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information to compute a real date. */
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do
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++rp;
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while (*rp >= '0' && *rp <= '9');
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break;
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case 'U':
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case 'V':
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case 'W':
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get_number(0, 53, 2);
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/* XXX This cannot determine any field in TM without some
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information. */
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break;
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case 'w':
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/* Match number of weekday. */
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get_number(0, 6, 1);
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tm->tm_wday = val;
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have_wday = 1;
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break;
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case 'y':
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/* Match year within century. */
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get_number(0, 99, 2);
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/* The "Year 2000: The Millennium Rollover" paper suggests that
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values in the range 69-99 refer to the twentieth century. */
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tm->tm_year = val >= 69 ? val : val + 100;
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/* Indicate that we want to use the century, if specified. */
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want_century = 1;
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want_xday = 1;
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break;
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case 'Y':
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/* Match year including century number. */
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get_number(0, 9999, 4);
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tm->tm_year = val - 1900;
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want_century = 0;
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want_xday = 1;
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break;
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case 'Z':
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/* XXX How to handle this? */
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break;
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case 'E':
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/* We have no information about the era format. Just use
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the normal format. */
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if (*fmt != 'c' && *fmt != 'C' && *fmt != 'y' && *fmt != 'Y'
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&& *fmt != 'x' && *fmt != 'X')
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/* This is an invalid format. */
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return NULL;
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goto start_over;
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case 'O':
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switch (*fmt++)
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{
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case 'd':
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case 'e':
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/* Match day of month using alternate numeric symbols. */
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get_alt_number(1, 31, 2);
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tm->tm_mday = val;
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have_mday = 1;
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want_xday = 1;
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break;
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case 'H':
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/* Match hour in 24-hour clock using alternate numeric
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symbols. */
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get_alt_number(0, 23, 2);
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tm->tm_hour = val;
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have_I = 0;
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break;
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case 'I':
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/* Match hour in 12-hour clock using alternate numeric
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symbols. */
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get_alt_number(1, 12, 2);
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tm->tm_hour = val - 1;
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have_I = 1;
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break;
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case 'm':
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/* Match month using alternate numeric symbols. */
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get_alt_number(1, 12, 2);
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tm->tm_mon = val - 1;
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have_mon = 1;
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want_xday = 1;
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break;
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case 'M':
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/* Match minutes using alternate numeric symbols. */
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get_alt_number(0, 59, 2);
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tm->tm_min = val;
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break;
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case 'S':
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/* Match seconds using alternate numeric symbols. */
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get_alt_number(0, 61, 2);
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tm->tm_sec = val;
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break;
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case 'U':
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case 'V':
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case 'W':
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get_alt_number(0, 53, 2);
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/* XXX This cannot determine any field in TM without
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further information. */
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break;
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case 'w':
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/* Match number of weekday using alternate numeric symbols. */
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get_alt_number(0, 6, 1);
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tm->tm_wday = val;
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have_wday = 1;
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break;
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case 'y':
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/* Match year within century using alternate numeric symbols. */
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get_alt_number(0, 99, 2);
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tm->tm_year = val >= 69 ? val : val + 100;
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want_xday = 1;
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break;
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default:
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return NULL;
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}
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break;
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default:
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return NULL;
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}
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}
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if (have_I && is_pm)
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tm->tm_hour += 12;
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if (century != -1)
|
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{
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if (want_century)
|
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tm->tm_year = tm->tm_year % 100 + (century - 19) * 100;
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else
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/* Only the century, but not the year. Strange, but so be it. */
|
||||
tm->tm_year = (century - 19) * 100;
|
||||
}
|
||||
|
||||
if (want_xday && !have_wday) {
|
||||
if (!(have_mon && have_mday) && have_yday) {
|
||||
/* we don't have tm_mon and/or tm_mday, compute them */
|
||||
int t_mon = 0;
|
||||
while (__mon_yday[__isleap(1900 + tm->tm_year)][t_mon] <= tm->tm_yday)
|
||||
t_mon++;
|
||||
if (!have_mon)
|
||||
tm->tm_mon = t_mon - 1;
|
||||
if (!have_mday)
|
||||
tm->tm_mday = tm->tm_yday - __mon_yday[__isleap(1900 + tm->tm_year)][t_mon - 1] + 1;
|
||||
}
|
||||
day_of_the_week(tm);
|
||||
}
|
||||
if (want_xday && !have_yday)
|
||||
day_of_the_year(tm);
|
||||
|
||||
return (char *)rp;
|
||||
}
|
||||
|
||||
char *
|
||||
strptime(const char *buf, const char *format, struct tm *tm)
|
||||
{
|
||||
enum locale_status decided;
|
||||
#ifdef HAVE_LOCALE_H
|
||||
if (!have_used_strptime) {
|
||||
get_locale_strings();
|
||||
/* have_used_strptime = 1; might change locale during session */
|
||||
}
|
||||
#endif
|
||||
decided = raw;
|
||||
return strptime_internal(buf, format, tm, &decided);
|
||||
}
|
||||
|
||||
#ifdef HAVE_LOCALE_H
|
||||
void get_locale_strings(void)
|
||||
{
|
||||
int i;
|
||||
struct tm tm;
|
||||
char buff[4];
|
||||
|
||||
tm.tm_sec = tm.tm_min = tm.tm_hour = tm.tm_mday = tm.tm_mon
|
||||
= tm.tm_isdst = 0;
|
||||
tm.tm_year = 30;
|
||||
for (i = 0; i < 12; i++) {
|
||||
tm.tm_mon = i;
|
||||
strftime(ab_month_name[i], 10, "%b", &tm);
|
||||
strftime(month_name[i], 20, "%B", &tm);
|
||||
}
|
||||
tm.tm_mon = 0;
|
||||
for (i = 0; i < 7; i++) {
|
||||
tm.tm_mday = tm.tm_yday = i + 1; /* 2000-1-2 was a Sunday */
|
||||
tm.tm_wday = i;
|
||||
strftime(ab_weekday_name[i], 10, "%a", &tm);
|
||||
strftime(weekday_name[i], 20, "%A", &tm);
|
||||
}
|
||||
tm.tm_hour = 1;
|
||||
/* in locales where these are unused, they may be empty: better
|
||||
not to reset them then */
|
||||
strftime(buff, 4, "%p", &tm);
|
||||
if (strlen(buff)) strcpy(am_pm[0], buff);
|
||||
tm.tm_hour = 13;
|
||||
strftime(buff, 4, "%p", &tm);
|
||||
if (strlen(buff)) strcpy(am_pm[1], buff);
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user