107 lines
2.4 KiB
Go
107 lines
2.4 KiB
Go
package binary
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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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"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, _ ...interface{}) error {
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if !utils.IsSortedListInt(L) {
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return fmt.Errorf("Ungültiger Input: L muss aufsteigend sortiert sein!")
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}
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return nil
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}
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func postChecks(L []int, x int, index int, _ ...interface{}) error {
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if utils.ArrayContains(L, x) {
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if !(index >= 0) {
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return fmt.Errorf("Der Algorithmus sollte nicht -1 zurückgeben.")
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}
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if L[index] != x {
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return fmt.Errorf("Der Algorithmus hat den falschen Index bestimmt.")
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}
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} else {
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if index != -1 {
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return fmt.Errorf("Der Algorithmus sollte -1 zurückgeben.")
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}
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}
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return nil
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}
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/* ---------------------------------------------------------------- *
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* ALGORITHM binary search + Display
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* ---------------------------------------------------------------- */
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func FancyBinarySearch(input_L []int, input_x int) (int, error) {
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var name = "Binärsuchalgorithmus"
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var inputs = map[string]interface{}{
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"L": input_L,
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"x": input_x,
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}
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var outputs map[string]interface{}
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var (
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output_index 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_x)
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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_index = BinarySearch(input_L, input_x)
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metrics.StopMetrics()
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outputs = map[string]interface{}{
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"index": output_index,
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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_x, output_index)
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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_index, err
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}
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