164 lines
3.6 KiB
Go
164 lines
3.6 KiB
Go
package ith_element
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/* ---------------------------------------------------------------- *
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* IMPORTS
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* ---------------------------------------------------------------- */
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import (
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"fmt"
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"sort"
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"ads/internal/core/metrics"
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"ads/internal/core/utils"
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"ads/internal/setup"
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)
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/* ---------------------------------------------------------------- *
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* GLOBAL VARIABLES/CONSTANTS
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* ---------------------------------------------------------------- */
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//
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/* ---------------------------------------------------------------- *
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* CHECKS
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* ---------------------------------------------------------------- */
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func preChecks(L []int, i int, _ ...interface{}) error {
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if !(1 <= i && i <= len(L)) {
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return fmt.Errorf("Der Wert von i muss zw. %[1]v und %[2]v liegen.", 1, len(L))
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} else if !utils.ContainsNoDuplicatesListInt(L) {
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return fmt.Errorf("Ungültiger Input: L darf keine Duplikate enthalten!")
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}
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return nil
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}
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func postChecks(L []int, i int, value int, _ ...interface{}) error {
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L_ := make([]int, len(L))
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copy(L_, L)
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sort.Ints(L_)
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if !(L_[i-1] == value) {
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return fmt.Errorf("Das i=%[1]v. kleinste Element ist %[2]v und nicht %[3]v.", i, L_[i-1], value)
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}
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return nil
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}
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/* ---------------------------------------------------------------- *
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* ALGORITHM find ith smallest + Display
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* ---------------------------------------------------------------- */
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func FancyFindIthSmallest(input_L []int, input_i int) (int, error) {
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var name = "Auswahlproblem (i. kleinstes Element)"
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var inputs = map[string]interface{}{
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"L": input_L,
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"i": input_i,
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}
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var outputs map[string]interface{}
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var (
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output_value int
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)
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var err error
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do_once := true
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for do_once {
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do_once = false
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// Start Message
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setup.DisplayStartOfAlgorithm(name, inputs)
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// Prechecks:
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if setup.AppConfigPerformChecks() {
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err = preChecks(input_L, input_i)
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if err != nil {
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break
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}
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}
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// Ausführung des Algorithmus:
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metrics.ResetMetrics()
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metrics.StartMetrics()
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output_value = FindIthSmallest(input_L, input_i)
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metrics.StopMetrics()
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outputs = map[string]interface{}{
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"value": output_value,
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}
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// Metriken anzeigen
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if setup.AppConfigShowMetrics() {
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setup.DisplayMetrics()
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}
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// End Message
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setup.DisplayEndOfAlgorithm(outputs)
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// Postchecks:
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if setup.AppConfigPerformChecks() {
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err = postChecks(input_L, input_i, output_value)
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if err != nil {
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break
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}
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}
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}
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return output_value, err
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}
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/* ---------------------------------------------------------------- *
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* ALGORITHM find ith smallest (D & C) + Display
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* ---------------------------------------------------------------- */
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func FancyFindIthSmallestDC(input_L []int, input_i int) (int, error) {
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var name = "Auswahlproblem (i. kleinstes Element, D & C)"
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var inputs = map[string]interface{}{
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"L": input_L,
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"i": input_i,
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}
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var outputs map[string]interface{}
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var (
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output_value int
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)
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var err error
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do_once := true
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for do_once {
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do_once = false
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// Start Message
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setup.DisplayStartOfAlgorithm(name, inputs)
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// Prechecks:
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if setup.AppConfigPerformChecks() {
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err = preChecks(input_L, input_i)
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if err != nil {
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break
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}
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}
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// Ausführung des Algorithmus:
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metrics.ResetMetrics()
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metrics.StartMetrics()
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output_value = FindIthSmallestDC(input_L, input_i)
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metrics.StopMetrics()
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outputs = map[string]interface{}{
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"value": output_value,
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}
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// Metriken anzeigen
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if setup.AppConfigShowMetrics() {
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setup.DisplayMetrics()
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}
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// End Message
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setup.DisplayEndOfAlgorithm(outputs)
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// Postchecks:
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if setup.AppConfigPerformChecks() {
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err = postChecks(input_L, input_i, output_value)
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if err != nil {
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break
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}
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}
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}
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return output_value, err
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}
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