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Addition and subtraction can end immediately without performing any extra work if the operand is 0

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Thomas Harte 2016-12-29 11:00:47 -05:00 committed by GitHub
parent a8bc9d830e
commit 54900ca3fb
1 changed files with 8 additions and 0 deletions
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8
Storage/Storage.hpp
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@ -89,6 +89,8 @@ struct Time {
inline Time operator + (const Time &other) const inline Time operator + (const Time &other) const
{ {
if(!other.length) return *this;
uint64_t result_length; uint64_t result_length;
uint64_t result_clock_rate; uint64_t result_clock_rate;
if(clock_rate == other.clock_rate) if(clock_rate == other.clock_rate)
@ -106,6 +108,8 @@ struct Time {
inline Time &operator += (const Time &other) inline Time &operator += (const Time &other)
{ {
if(!other.length) return *this;
uint64_t result_length; uint64_t result_length;
uint64_t result_clock_rate; uint64_t result_clock_rate;
if(clock_rate == other.clock_rate) if(clock_rate == other.clock_rate)
@ -124,6 +128,8 @@ struct Time {
inline Time operator - (const Time &other) const inline Time operator - (const Time &other) const
{ {
if(!other.length) return *this;
uint64_t result_length; uint64_t result_length;
uint64_t result_clock_rate; uint64_t result_clock_rate;
if(clock_rate == other.clock_rate) if(clock_rate == other.clock_rate)
@ -141,6 +147,8 @@ struct Time {
inline Time operator -= (const Time &other) inline Time operator -= (const Time &other)
{ {
if(!other.length) return *this;
uint64_t result_length; uint64_t result_length;
uint64_t result_clock_rate; uint64_t result_clock_rate;
if(clock_rate == other.clock_rate) if(clock_rate == other.clock_rate)