// // Created by xzl on 2018/11/6. // #ifndef ZLMEDIAKIT_STRPTIME_WIN_H #define ZLMEDIAKIT_STRPTIME_WIN_H #include #include #include #include #include #define TM_YEAR_BASE 1900 /* * We do not implement alternate representations. However, we always * check whether a given modifier is allowed for a certain conversion. */ #define ALT_E 0x01 #define ALT_O 0x02 #define LEGAL_ALT(x) { if (alt_format & ~(x)) return (0); } static int conv_num(const char **, int *, int, int); static const char *day[7] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" }; static const char *abday[7] = { "Sun","Mon","Tue","Wed","Thu","Fri","Sat" }; static const char *mon[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; static const char *abmon[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; static const char *am_pm[2] = { "AM", "PM" }; //window上自己实现strptime函数，linux已经提供strptime //strptime函数windows平台上实现 char * strptime(const char *buf, const char *fmt, struct tm *tm) { char c; const char *bp; size_t len = 0; int alt_format, i, split_year = 0; bp = buf; while ((c = *fmt) != '\0') { /* Clear `alternate' modifier prior to new conversion. */ alt_format = 0; /* Eat up white-space. */ if (isspace(c)) { while (isspace(*bp)) bp++; fmt++; continue; } if ((c = *fmt++) != '%') goto literal; again: switch (c = *fmt++) { case '%': /* "%%" is converted to "%". */ literal: if (c != *bp++) return (0); break; /* * "Alternative" modifiers. Just set the appropriate flag * and start over again. */ case 'E': /* "%E?" alternative conversion modifier. */ LEGAL_ALT(0); alt_format |= ALT_E; goto again; case 'O': /* "%O?" alternative conversion modifier. */ LEGAL_ALT(0); alt_format |= ALT_O; goto again; /* * "Complex" conversion rules, implemented through recursion. */ case 'c': /* Date and time, using the locale's format. */ LEGAL_ALT(ALT_E); if (!(bp = strptime(bp, "%x %X", tm))) return (0); break; case 'D': /* The date as "%m/%d/%y". */ LEGAL_ALT(0); if (!(bp = strptime(bp, "%m/%d/%y", tm))) return (0); break; case 'R': /* The time as "%H:%M". */ LEGAL_ALT(0); if (!(bp = strptime(bp, "%H:%M", tm))) return (0); break; case 'r': /* The time in 12-hour clock representation. */ LEGAL_ALT(0); if (!(bp = strptime(bp, "%I:%M:%S %p", tm))) return (0); break; case 'T': /* The time as "%H:%M:%S". */ LEGAL_ALT(0); if (!(bp = strptime(bp, "%H:%M:%S", tm))) return (0); break; case 'X': /* The time, using the locale's format. */ LEGAL_ALT(ALT_E); if (!(bp = strptime(bp, "%H:%M:%S", tm))) return (0); break; case 'x': /* The date, using the locale's format. */ LEGAL_ALT(ALT_E); if (!(bp = strptime(bp, "%m/%d/%y", tm))) return (0); break; /* * "Elementary" conversion rules. */ case 'A': /* The day of week, using the locale's form. */ case 'a': LEGAL_ALT(0); for (i = 0; i < 7; i++) { /* Full name. */ len = strlen(day[i]); if (strncmp(day[i], bp, len) == 0) break; /* Abbreviated name. */ len = strlen(abday[i]); if (strncmp(abday[i], bp, len) == 0) break; } /* Nothing matched. */ if (i == 7) return (0); tm->tm_wday = i; bp += len; break; case 'B': /* The month, using the locale's form. */ case 'b': case 'h': LEGAL_ALT(0); for (i = 0; i < 12; i++) { /* Full name. */ len = strlen(mon[i]); if (strncmp(mon[i], bp, len) == 0) break; /* Abbreviated name. */ len = strlen(abmon[i]); if (strncmp(abmon[i], bp, len) == 0) break; } /* Nothing matched. */ if (i == 12) return (0); tm->tm_mon = i; bp += len; break; case 'C': /* The century number. */ LEGAL_ALT(ALT_E); if (!(conv_num(&bp, &i, 0, 99))) return (0); if (split_year) { tm->tm_year = (tm->tm_year % 100) + (i * 100); } else { tm->tm_year = i * 100; split_year = 1; } break; case 'd': /* The day of month. */ case 'e': LEGAL_ALT(ALT_O); if (!(conv_num(&bp, &tm->tm_mday, 1, 31))) return (0); break; case 'k': /* The hour (24-hour clock representation). */ LEGAL_ALT(0); /* FALLTHROUGH */ case 'H': LEGAL_ALT(ALT_O); if (!(conv_num(&bp, &tm->tm_hour, 0, 23))) return (0); break; case 'l': /* The hour (12-hour clock representation). */ LEGAL_ALT(0); /* FALLTHROUGH */ case 'I': LEGAL_ALT(ALT_O); if (!(conv_num(&bp, &tm->tm_hour, 1, 12))) return (0); if (tm->tm_hour == 12) tm->tm_hour = 0; break; case 'j': /* The day of year. */ LEGAL_ALT(0); if (!(conv_num(&bp, &i, 1, 366))) return (0); tm->tm_yday = i - 1; break; case 'M': /* The minute. */ LEGAL_ALT(ALT_O); if (!(conv_num(&bp, &tm->tm_min, 0, 59))) return (0); break; case 'm': /* The month. */ LEGAL_ALT(ALT_O); if (!(conv_num(&bp, &i, 1, 12))) return (0); tm->tm_mon = i - 1; break; case 'p': /* The locale's equivalent of AM/PM. */ LEGAL_ALT(0); /* AM? */ if (strcmp(am_pm[0], bp) == 0) { if (tm->tm_hour > 11) return (0); bp += strlen(am_pm[0]); break; } /* PM? */ else if (strcmp(am_pm[1], bp) == 0) { if (tm->tm_hour > 11) return (0); tm->tm_hour += 12; bp += strlen(am_pm[1]); break; } /* Nothing matched. */ return (0); case 'S': /* The seconds. */ LEGAL_ALT(ALT_O); if (!(conv_num(&bp, &tm->tm_sec, 0, 61))) return (0); break; case 'U': /* The week of year, beginning on sunday. */ case 'W': /* The week of year, beginning on monday. */ LEGAL_ALT(ALT_O); /* * XXX This is bogus, as we can not assume any valid * information present in the tm structure at this * point to calculate a real value, so just check the * range for now. */ if (!(conv_num(&bp, &i, 0, 53))) return (0); break; case 'w': /* The day of week, beginning on sunday. */ LEGAL_ALT(ALT_O); if (!(conv_num(&bp, &tm->tm_wday, 0, 6))) return (0); break; case 'Y': /* The year. */ LEGAL_ALT(ALT_E); if (!(conv_num(&bp, &i, 0, 9999))) return (0); tm->tm_year = i - TM_YEAR_BASE; break; case 'y': /* The year within 100 years of the epoch. */ LEGAL_ALT(ALT_E | ALT_O); if (!(conv_num(&bp, &i, 0, 99))) return (0); if (split_year) { tm->tm_year = ((tm->tm_year / 100) * 100) + i; break; } split_year = 1; if (i <= 68) tm->tm_year = i + 2000 - TM_YEAR_BASE; else tm->tm_year = i + 1900 - TM_YEAR_BASE; break; /* * Miscellaneous conversions. */ case 'n': /* Any kind of white-space. */ case 't': LEGAL_ALT(0); while (isspace(*bp)) bp++; break; default: /* Unknown/unsupported conversion. */ return (0); } } /* LINTED functional specification */ return ((char *)bp); } static int conv_num(const char **buf, int *dest, int llim, int ulim) { int result = 0; /* The limit also determines the number of valid digits. */ int rulim = ulim; if (**buf < '0' || **buf > '9') return (0); do { result *= 10; result += *(*buf)++ - '0'; rulim /= 10; } while ((result * 10 <= ulim) && rulim && **buf >= '0' && **buf <= '9'); if (result < llim || result > ulim) return (0); *dest = result; return (1); } #endif //ZLMEDIAKIT_STRPTIME_WIN_H