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note description: "Durations of time" legal: "See notice at end of class." status: "See notice at end of class." date: "$Date: 2017-03-29 04:26:46 -0800 (Wed, 29 Mar 2017) $" revision: "$Revision: 100065 $" access: time class interface TIME_DURATION create make (h, m, s: INTEGER_32) -- Set hour, minute and second to h, m, s respectively. ensure hour_set: hour = h minute_set: minute = m second_set: second = s make_fine (h, m: INTEGER_32; s: REAL_64) -- Set hour, minute' and second to h, m and truncated to -- integer part of s respectively. -- Set fractional_second to the fractional part of s. ensure hour_set: hour = h minute_set: minute = m fine_second_set: fine_second = s make_by_seconds (s: INTEGER_32) -- Set the object by the number of seconds s. ensure seconds_count_set: seconds_count = s make_by_fine_seconds (s: REAL_64) -- Set the object by the number of seconds s. ensure minute_large_enough: minute >= 0 minute_small_enough: minute < Minutes_in_hour second_large_enough: second >= 0 second_small_enough: second < Seconds_in_minute fine_seconds_set: dabs (fine_seconds_count - s) <= Tolerance feature -- Initialization make (h, m, s: INTEGER_32) -- Set hour, minute and second to h, m, s respectively. ensure hour_set: hour = h minute_set: minute = m second_set: second = s make_by_fine_seconds (s: REAL_64) -- Set the object by the number of seconds s. ensure minute_large_enough: minute >= 0 minute_small_enough: minute < Minutes_in_hour second_large_enough: second >= 0 second_small_enough: second < Seconds_in_minute fine_seconds_set: dabs (fine_seconds_count - s) <= Tolerance make_by_seconds (s: INTEGER_32) -- Set the object by the number of seconds s. ensure seconds_count_set: seconds_count = s make_fine (h, m: INTEGER_32; s: REAL_64) -- Set hour, minute' and second to h, m and truncated to -- integer part of s respectively. -- Set fractional_second to the fractional part of s. ensure hour_set: hour = h minute_set: minute = m fine_second_set: fine_second = s feature -- Access arc_cosine (v: REAL_64): REAL_64 -- Trigonometric arccosine of radian v -- in the range [0, pi]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class arc_sine (v: REAL_64): REAL_64 -- Trigonometric arcsine of radian v -- in the range [-pi/2, +pi/2]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class arc_tangent (v: REAL_64): REAL_64 -- Trigonometric arctangent of radian v -- in the range [-pi/2, +pi/2]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class ceiling (v: REAL_64): REAL_64 -- Least integral greater than or equal to v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class cosine (v: REAL_64): REAL_64 -- Trigonometric cosine of radian v approximated -- in the range [-pi/4, +pi/4]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class dabs (v: REAL_64): REAL_64 -- Absolute of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class Date_time_tools: DATE_TIME_TOOLS -- Tools for outputting dates and times in different formats -- (from TIME_UTILITY) default_format_string: STRING_8 -- Default output format string -- (from TIME_UTILITY) Euler: REAL_64 = 2.7182818284590452353602874713526625 -- Logarithm base -- (from MATH_CONST) exp (x: REAL_64): REAL_64 -- Exponential of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class fine_seconds_count: REAL_64 -- Number of seconds and fractionals of seconds of current duration floor (v: REAL_64): REAL_64 -- Greatest integral less than or equal to v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class generating_type: TYPE [detachable TIME_DURATION] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty Hours_in_day: INTEGER_32 = 24 -- Number of hours in a day -- (from TIME_CONSTANTS) log (v: REAL_64): REAL_64 -- Natural logarithm of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class log10 (v: REAL_64): REAL_64 -- Base 10 logarithm of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class log_2 (v: REAL_64): REAL_64 -- Base 2 logarithm of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class Minutes_in_hour: INTEGER_32 = 60 -- Number of minutes in an hour -- (from TIME_CONSTANTS) Pi: REAL_64 = 3.1415926535897932384626433832795029 -- (from MATH_CONST) Pi_2: REAL_64 = 1.5707963267948966192313216916397514 -- (from MATH_CONST) Pi_4: REAL_64 = 0.7853981633974483096156608458198757 -- (from MATH_CONST) seconds_count: INTEGER_32 -- Total number of seconds of current duration ensure same_count: Result = fine_seconds_count.truncated_to_integer Seconds_in_day: INTEGER_32 = 86400 -- Number of seconds in an hour -- (from TIME_CONSTANTS) Seconds_in_hour: INTEGER_32 = 3600 -- Number of seconds in an hour -- (from TIME_CONSTANTS) Seconds_in_minute: INTEGER_32 = 60 -- Number of seconds in a minute -- (from TIME_CONSTANTS) sine (v: REAL_64): REAL_64 -- Trigonometric sine of radian v approximated -- in range [-pi/4, +pi/4]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class sqrt (v: REAL_64): REAL_64 -- Square root of v. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class Sqrt2: REAL_64 = 1.4142135623730950488016887242096981 -- Square root of 2 -- (from MATH_CONST) tangent (v: REAL_64): REAL_64 -- Trigonometric tangent of radian v approximated -- in range [-pi/4, +pi/4]. -- (from DOUBLE_MATH) ensure -- from DOUBLE_MATH instance_free: class time_default_format_string: STRING_8 -- Default output format for times -- (from TIME_CONSTANTS) zero: like Current -- Neutral element for "+" and "-" ensure -- from GROUP_ELEMENT result_exists: Result /= Void feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal alias "≡≡≡" (other: TIME_DURATION): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_greater alias ">" (other: TIME_DURATION): BOOLEAN -- Is current object greater than other? -- (from PART_COMPARABLE) require -- from PART_COMPARABLE other_exists: other /= Void is_greater_equal alias ">=" alias "" (other: TIME_DURATION): BOOLEAN -- Is current object greater than or equal to other? -- (from PART_COMPARABLE) require -- from PART_COMPARABLE other_exists: other /= Void is_less_equal alias "<=" alias "" (other: TIME_DURATION): BOOLEAN -- Is current object less than or equal to other? -- (from PART_COMPARABLE) require -- from PART_COMPARABLE other_exists: other /= Void frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal alias "" (other: TIME_DURATION): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report canonical: BOOLEAN -- Is duration expressed minimally, i.e. -- If duration is positive then -- hour positive, -- minute and second between 0 and 59, -- fractional_second between 0 and 999? -- If duration is negative then -- hour negative, -- minute and second between -59 and 0, -- fractional_second between -999 and 0? conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void is_negative: BOOLEAN -- Is duration negative? -- (from DURATION) is_positive: BOOLEAN -- Is duration positive? is_zero: BOOLEAN -- Is duration zero? -- (from DURATION) same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) feature -- Element change identity alias "+": TIME_DURATION -- Unary plus -- (from DURATION) ensure -- from GROUP_ELEMENT result_exists: Result /= Void result_definition: Result.is_equal (Current) minus alias "-" (other: TIME_DURATION): TIME_DURATION -- Difference with other -- (from DURATION) require -- from GROUP_ELEMENT other_exists: other /= Void ensure -- from GROUP_ELEMENT result_exists: Result /= Void feature -- Conversion time_modulo_day: like Current -- Duration modulo duration of a day ensure result_smaller_than_day: Result.seconds_count < Seconds_in_day result_positive: Result >= zero to_canonical: like Current -- A new duration ensure result_canonical: Result.canonical to_days: INTEGER_32 -- Total number of days equivalent to the current duration feature -- Duplication copy (other: TIME_DURATION) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: TIME_DURATION) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: TIME_DURATION -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: TIME_DURATION) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: TIME_DURATION -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: TIME_DURATION -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable TIME_DURATION -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) div (i, j: INTEGER_32): INTEGER_32 -- (i \\ j) if i positive -- (i \\ j + 1) if i negative -- (from TIME_UTILITY) ensure -- from TIME_UTILITY result_definition: i = j * Result + mod (i, j) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class fine_second_add (s: REAL_64) -- Add s seconds to the current time. -- if s has decimals, fractional_second is modifed. hour_add (h: INTEGER_32) -- Add h hours to the current duration. ensure hour_set: hour = old hour + h minute_add (m: INTEGER_32) -- Add m minutes to the current duration. ensure minute_set: minute = old minute + m mod (i, j: INTEGER_32): INTEGER_32 -- (i \\ j) if i positive -- (i \\ j + j) if i negative -- (from TIME_UTILITY) ensure -- from TIME_UTILITY positive_result: Result >= 0 result_definition: i = j * div (i, j) + Result opposite alias "-": like Current -- Unary minus ensure -- from GROUP_ELEMENT result_exists: Result /= Void result_definition: (Result + Current).is_equal (zero) plus alias "+" (other: like Current): like Current -- Sum with other require -- from GROUP_ELEMENT other_exists: other /= Void ensure -- from GROUP_ELEMENT result_exists: Result /= Void commutative: Result.is_equal (other + Current) second_add (s: INTEGER_32) -- Add s seconds to the current duration. ensure second_set: second = old second + s feature -- Attributes fine_second: REAL_64 -- Number of fine seconds associated with current object fractional_second: REAL_64 hour: INTEGER_32 -- Number of hours associated with current object minute: INTEGER_32 -- Number of minutes associated with current object second: INTEGER_32 -- Number of seconds associated with current object. feature -- Comparaison is_equal (other: like Current): BOOLEAN -- Is the current duration equal to other? require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result is_less alias "<" (other: like Current): BOOLEAN -- Is the current duration smaller than other? require -- from PART_COMPARABLE other_exists: other /= Void feature -- Element Change set_fine_second (s: REAL_64) -- Set fine_second to s. require -- from TIME_MEASUREMENT s_large_enough: s >= 0.to_double s_small_enough: s < Seconds_in_minute.to_double ensure -- from TIME_MEASUREMENT fine_second_set: fine_second = s set_fractionals (f: REAL_64) -- Set fractional_second to f. -- f must have the same sign as second. require -- from TIME_MEASUREMENT f_large_enough: f >= 0.to_double f_small_enough: f < 1.to_double ensure -- from TIME_MEASUREMENT second_same: second = old second set_hour (h: INTEGER_32) -- Set hour to h. require -- from TIME_MEASUREMENT h_large_enough: h >= 0 h_small_enough: h < Hours_in_day ensure -- from TIME_MEASUREMENT hour_set: hour = h set_minute (m: INTEGER_32) -- Set minute to m. require -- from TIME_MEASUREMENT m_large_enough: m >= 0 m_small_enough: m < Minutes_in_hour ensure -- from TIME_MEASUREMENT minute_set: minute = m set_second (s: INTEGER_32) -- Set second to s. -- fractional_second is cut down to 0. require -- from TIME_MEASUREMENT s_large_enough: s >= 0 s_small_enough: s < Seconds_in_minute ensure -- from TIME_MEASUREMENT second_set: second = s feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void invariant fractionals_large_enough: fractional_second > -1.to_double fractionals_small_enough: fractional_second < 1.to_double fractional_and_second_same_sign: second.to_double * fractional_second >= 0.to_double equal_signs: canonical implies (hour >= 0 and minute >= 0 and fine_second >= 0.to_double) or (hour <= 0 and minute <= 0 and fine_second <= 0.to_double) -- from DURATION sign_correctness: is_positive xor is_negative xor is_zero -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) -- from GROUP_ELEMENT neutral_addition: is_equal (Current + zero) self_subtraction: zero.is_equal (Current - Current) note copyright: "Copyright (c) 1984-2017, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class TIME_DURATION
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