kylefang/AsyncDisplayKit
1
0
Fork 0
mirror of https://github.com/HackPlan/AsyncDisplayKit.git synced 2026-03-28 23:58:50 +08:00
Code Issues Packages Projects Releases Wiki Activity

Parse RFC 3339 date time strings around 7-8 times faster (#2059)

Browse Source
This commit is contained in:
Michael Schneider
2016-08-11 12:46:26 -07:00
committed by Adlai Holler
parent aedb83cfe3
commit 075dd73280
1 changed files with 86 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

104
examples/ASDKgram/Sample/Utilities.m
View File

@@ -21,6 +21,85 @@
#define StrokeRoundedImages 0
#define IsDigit(v) (v >= '0' && v <= '9')
static time_t parseRfc3339ToTimeT(const char *string)
{
int dy, dm, dd;
int th, tm, ts;
int oh, om, osign;
char current;
if (!string)
return (time_t)0;
// date
if (sscanf(string, "%04d-%02d-%02d", &dy, &dm, &dd) == 3) {
string += 10;
if (*string++ != 'T')
return (time_t)0;
// time
if (sscanf(string, "%02d:%02d:%02d", &th, &tm, &ts) == 3) {
string += 8;
current = *string;
// optional: second fraction
if (current == '.') {
++string;
while(IsDigit(*string))
++string;
current = *string;
}
if (current == 'Z') {
oh = om = 0;
osign = 1;
} else if (current == '-') {
++string;
if (sscanf(string, "%02d:%02d", &oh, &om) != 2)
return (time_t)0;
osign = -1;
} else if (current == '+') {
++string;
if (sscanf(string, "%02d:%02d", &oh, &om) != 2)
return (time_t)0;
osign = 1;
} else {
return (time_t)0;
}
struct tm timeinfo;
timeinfo.tm_wday = timeinfo.tm_yday = 0;
timeinfo.tm_zone = NULL;
timeinfo.tm_isdst = -1;
timeinfo.tm_year = dy - 1900;
timeinfo.tm_mon = dm - 1;
timeinfo.tm_mday = dd;
timeinfo.tm_hour = th;
timeinfo.tm_min = tm;
timeinfo.tm_sec = ts;
// convert to utc
return timegm(&timeinfo) - (((oh * 60 * 60) + (om * 60)) * osign);
}
}
return (time_t)0;
}
static NSDate *parseRfc3339ToNSDate(NSString *rfc3339DateTimeString)
{
time_t t = parseRfc3339ToTimeT([rfc3339DateTimeString cStringUsingEncoding:NSUTF8StringEncoding]);
return [NSDate dateWithTimeIntervalSince1970:t];
}
@implementation UIColor (Additions)
+ (UIColor *)darkBlueColor
@@ -142,26 +221,15 @@
@implementation NSString (Additions)
// Returns a user-visible date time string that corresponds to the
// specified RFC 3339 date time string. Note that this does not handle
// all possible RFC 3339 date time strings, just one of the most common
// styles.
/*
* Returns a user-visible date time string that corresponds to the
* specified RFC 3339 date time string. Note that this does not handle
* all possible RFC 3339 date time strings, just one of the most common
* styles.
*/
+ (NSDate *)userVisibleDateTimeStringForRFC3339DateTimeString:(NSString *)rfc3339DateTimeString
{
NSDateFormatter * rfc3339DateFormatter;
NSLocale * enUSPOSIXLocale;
// Convert the RFC 3339 date time string to an NSDate.
rfc3339DateFormatter = [[NSDateFormatter alloc] init];
enUSPOSIXLocale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
[rfc3339DateFormatter setLocale:enUSPOSIXLocale];
[rfc3339DateFormatter setDateFormat:@"yyyy'-'MM'-'dd'T'HH':'mm':'ssZ'"];
[rfc3339DateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
return [rfc3339DateFormatter dateFromString:rfc3339DateTimeString];
return parseRfc3339ToNSDate(rfc3339DateTimeString);
}
+ (NSString *)elapsedTimeStringSinceDate:(NSString *)uploadDateString