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Add internal type for time calculations.

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This commit is contained in:
Jan Weiß 2021-05-06 17:17:40 +02:00
parent c0b3161d3c
commit 64faed3f9b
1 changed files with 28 additions and 15 deletions
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43
Formatters/SecondsFormatter.m
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@ -20,6 +20,19 @@
#import "SecondsFormatter.h"
#define TWO_GIGASECONDS_IS_ENOUGH 1 // 2 Gs is about 68 years.
#if TWO_GIGASECONDS_IS_ENOUGH
typedef int32_t sec_t; // Type used internally for time values (mostly in seconds).
#define PRIsec PRIi32
#define SEC_MAX INT32_MAX
#define scanSec scanInt
#else
typedef NSInteger sec_t;
#define PRIsec "zd"
#define SEC_MAX NSIntegerMax
#define scanSec scanInteger
#endif
@implementation SecondsFormatter
- (NSString *) stringForObjectValue:(id)object
@ -41,12 +54,12 @@
BOOL isNegative = signbit(timeInterval);
int totalSeconds = (int)(isNegative ? -timeInterval : timeInterval);
sec_t totalSeconds = (sec_t)(isNegative ? -timeInterval : timeInterval);
int seconds = totalSeconds % 60;
int minutes = totalSeconds / 60;
int hours = 0;
int days = 0;
sec_t seconds = totalSeconds % 60;
sec_t minutes = totalSeconds / 60;
sec_t hours = 0;
sec_t days = 0;
while (60 <= minutes) {
minutes -= 60;
@ -63,16 +76,16 @@
const char *signPrefix = isNegative ? "-" : "";
if (0 < days) {
result = [NSString stringWithFormat:@"%s" "%" PRIi32 ":" "%02" PRIi32 ":" "%02" PRIi32 ":" "%02" PRIi32 "", signPrefix, days, hours, minutes, seconds];
result = [NSString stringWithFormat:@"%s" "%" PRIsec ":" "%02" PRIsec ":" "%02" PRIsec ":" "%02" PRIsec "", signPrefix, days, hours, minutes, seconds];
}
else if (0 < hours) {
result = [NSString stringWithFormat:@"%s" "%" PRIi32 ":" "%02" PRIi32 ":" "%02" PRIi32 "", signPrefix, hours, minutes, seconds];
result = [NSString stringWithFormat:@"%s" "%" PRIsec ":" "%02" PRIsec ":" "%02" PRIsec "", signPrefix, hours, minutes, seconds];
}
else if (0 < minutes) {
result = [NSString stringWithFormat:@"%s" "%" PRIi32 ":" "%02" PRIi32 "", signPrefix, minutes, seconds];
result = [NSString stringWithFormat:@"%s" "%" PRIsec ":" "%02" PRIsec "", signPrefix, minutes, seconds];
}
else {
result = [NSString stringWithFormat:@"%s" "0:" "%02" PRIi32 "", signPrefix, seconds];
result = [NSString stringWithFormat:@"%s" "0:" "%02" PRIsec "", signPrefix, seconds];
}
return result;
@ -93,7 +106,7 @@
const int segmentCount = 4;
const int lastSegment = segmentCount - 1;
int segments[segmentCount] = {-1, -1, -1, -1};
sec_t segments[segmentCount] = {-1, -1, -1, -1};
int lastScannedSegment = -1;
BOOL isNegative = NO;
@ -105,7 +118,7 @@
while ([scanner isAtEnd] == NO) {
// Grab a value
if ([scanner scanInt:&(segments[segmentIndex])] == NO) {
if ([scanner scanSec:&(segments[segmentIndex])] == NO) {
segments[segmentIndex] = -1;
malformed = YES;
break;
@ -130,7 +143,7 @@
malformed = YES;
}
int seconds = 0;
sec_t seconds = 0;
if (malformed == NO) {
// `segments` entries need to be mapped to the correct unit type.
@ -153,12 +166,12 @@
(segmentIndexes[lastScannedSegment][(segmentType)] >= 0)
typedef struct {
int max;
int scaleFactor;
sec_t max;
sec_t scaleFactor;
} SegmentMetadata;
const SegmentMetadata segmentMetadata[segmentCount] = {
{.max = INT32_MAX, .scaleFactor = 24},
{.max = SEC_MAX, .scaleFactor = 24},
{.max = 24, .scaleFactor = 60},
{.max = 60, .scaleFactor = 60},
{.max = 60, .scaleFactor = 1},