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¿Por qué las bibliotecas estándar de Java y JavaScript generan diferentes valores CRC-32? ¿Cómo obtengo el mismo resultado?

¿Por qué la biblioteca JavaScript crc-32 y la clase Java CRC32 arrojan resultados diferentes? ¿Lo estoy implementando mal?

 const CRC32 = require('crc-32') const input = "3b67b67f-673b-4f23-a023-3756f513d707:19.63865368:6ace080f-6f47-44fa-86f8-c278f5bb6f07:2.34121407:42dda603-8a36-4200-826c-80714a40b470:0.923498:1301a851-b77e-489f-beb8-c2b4ef349a90:0.08:bf077871-5709-4a84-b3a9-22bfa8313fa2:0.00382495:6341cbef-bccc-43af-8927-31be3f3cd2e9:1.24039659:aeef18c5-457c-41ca-abda-3940b151e410:0.02821:42943143-bb81-4993-8788-df3c434bce89:0.09:787ef6da-48ce-4bb5-978a-b0fdd9ce223a:0.07:c3850c7b-d0fa-4c2a-8c67-0405bee185da:0.50443922:06429537-15e7-465c-aafa-f9974fb20b95:0.48535755:978d18ba-ffe7-48a3-9642-0de57b249383:0.1:59de5468-be8c-4d56-ad1e-3425914fc081:0.35722062:b6eea705-651b-40db-9b01-e535150ab0f3:0.00408603:6cc9440e-d86b-475d-986e-b9076104873a:1.80178:7711fc0e-dc02-431f-90b8-fde7cd762ce0:0.00402297:58397c47-5cac-424c-9b2b-7dc50c703f6f:0.08" CRC32.str(input) # Result: -1990607021
 import java.util.zip.CRC32 val input = "3b67b67f-673b-4f23-a023-3756f513d707:19.63865368:6ace080f-6f47-44fa-86f8-c278f5bb6f07:2.34121407:42dda603-8a36-4200-826c-80714a40b470:0.923498:1301a851-b77e-489f-beb8-c2b4ef349a90:0.08:bf077871-5709-4a84-b3a9-22bfa8313fa2:0.00382495:6341cbef-bccc-43af-8927-31be3f3cd2e9:1.24039659:aeef18c5-457c-41ca-abda-3940b151e410:0.02821:42943143-bb81-4993-8788-df3c434bce89:0.09:787ef6da-48ce-4bb5-978a-b0fdd9ce223a:0.07:c3850c7b-d0fa-4c2a-8c67-0405bee185da:0.50443922:06429537-15e7-465c-aafa-f9974fb20b95:0.48535755:978d18ba-ffe7-48a3-9642-0de57b249383:0.1:59de5468-be8c-4d56-ad1e-3425914fc081:0.35722062:b6eea705-651b-40db-9b01-e535150ab0f3:0.00408603:6cc9440e-d86b-475d-986e-b9076104873a:1.80178:7711fc0e-dc02-431f-90b8-fde7cd762ce0:0.00402297:58397c47-5cac-424c-9b2b-7dc50c703f6f:0.08" val crC32 = CRC32() crC32.update(input.toByteArray(Charsets.UTF_8)) crC32.value # Result 2304360275

¿Cómo hago para que la función Kotlin devuelva el mismo valor que JavaScript?

about 4 years ago · Juan Pablo Isaza
1 answers
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0

No son diferentes. Ambos tienen exactamente el mismo valor de 32 bits, en un caso interpretado como un entero de 32 bits sin signo, en el otro interpretado como un entero de 32 bits con signo en complemento a dos.

Simplemente convierta el valor long de Java en un int con (int) y obtendrá la interpretación firmada.

about 4 years ago · Juan Pablo Isaza Report
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