mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-01 00:57:28 +08:00
374 lines
9.7 KiB
C
374 lines
9.7 KiB
C
//
|
||
// Created by xzl on 2018/11/6.
|
||
//
|
||
|
||
#ifndef ZLMEDIAKIT_STRPTIME_WIN_H
|
||
#define ZLMEDIAKIT_STRPTIME_WIN_H
|
||
|
||
#include <time.h>
|
||
#include <string.h>
|
||
#include <stdlib.h>
|
||
#include <stdio.h>
|
||
#include <ctype.h>
|
||
|
||
#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
|