refactor: use <cstdlib> over stdlib.h

We currently use both. Consolidate on the former.

11 files changed, 11 insertions, 11 deletions

diff --git a/src/crypto/chacha20.h b/src/crypto/chacha20.h
index 69fbbe9fa5..de16a77878 100644
--- a/src/crypto/chacha20.h
+++ b/src/crypto/chacha20.h
@@ -5,8 +5,8 @@
 #ifndef BITCOIN_CRYPTO_CHACHA20_H
 #define BITCOIN_CRYPTO_CHACHA20_H
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 /** A class for ChaCha20 256-bit stream cipher developed by Daniel J. Bernstein
     https://cr.yp.to/chacha/chacha-20080128.pdf */
diff --git a/src/crypto/hkdf_sha256_32.h b/src/crypto/hkdf_sha256_32.h
index fa1e42aec1..878b03a37f 100644
--- a/src/crypto/hkdf_sha256_32.h
+++ b/src/crypto/hkdf_sha256_32.h
@@ -7,8 +7,8 @@
 
 #include <crypto/hmac_sha256.h>
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 /** A rfc5869 HKDF implementation with HMAC_SHA256 and fixed key output length of 32 bytes (L=32) */
 class CHKDF_HMAC_SHA256_L32
diff --git a/src/crypto/hmac_sha256.h b/src/crypto/hmac_sha256.h
index d31fda1dd1..9c25edd7c1 100644
--- a/src/crypto/hmac_sha256.h
+++ b/src/crypto/hmac_sha256.h
@@ -7,8 +7,8 @@
 
 #include <crypto/sha256.h>
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 /** A hasher class for HMAC-SHA-256. */
 class CHMAC_SHA256
diff --git a/src/crypto/hmac_sha512.h b/src/crypto/hmac_sha512.h
index 1ea9a3671e..6acce8992e 100644
--- a/src/crypto/hmac_sha512.h
+++ b/src/crypto/hmac_sha512.h
@@ -7,8 +7,8 @@
 
 #include <crypto/sha512.h>
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 /** A hasher class for HMAC-SHA-512. */
 class CHMAC_SHA512
diff --git a/src/crypto/poly1305.h b/src/crypto/poly1305.h
index 1598b013b9..c80faada7e 100644
--- a/src/crypto/poly1305.h
+++ b/src/crypto/poly1305.h
@@ -5,8 +5,8 @@
 #ifndef BITCOIN_CRYPTO_POLY1305_H
 #define BITCOIN_CRYPTO_POLY1305_H
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 #define POLY1305_KEYLEN 32
 #define POLY1305_TAGLEN 16
diff --git a/src/crypto/ripemd160.h b/src/crypto/ripemd160.h
index 38ea375c1f..f1d89b8407 100644
--- a/src/crypto/ripemd160.h
+++ b/src/crypto/ripemd160.h
@@ -5,8 +5,8 @@
 #ifndef BITCOIN_CRYPTO_RIPEMD160_H
 #define BITCOIN_CRYPTO_RIPEMD160_H
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 /** A hasher class for RIPEMD-160. */
 class CRIPEMD160
diff --git a/src/crypto/sha1.h b/src/crypto/sha1.h
index 8b4568ee12..6ef0187efd 100644
--- a/src/crypto/sha1.h
+++ b/src/crypto/sha1.h
@@ -5,8 +5,8 @@
 #ifndef BITCOIN_CRYPTO_SHA1_H
 #define BITCOIN_CRYPTO_SHA1_H
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 /** A hasher class for SHA1. */
 class CSHA1
diff --git a/src/crypto/sha256.h b/src/crypto/sha256.h
index 028ee14345..24bd1f2e7e 100644
--- a/src/crypto/sha256.h
+++ b/src/crypto/sha256.h
@@ -5,8 +5,8 @@
 #ifndef BITCOIN_CRYPTO_SHA256_H
 #define BITCOIN_CRYPTO_SHA256_H
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 #include <string>
 
 /** A hasher class for SHA-256. */
diff --git a/src/crypto/sha256_sse4.cpp b/src/crypto/sha256_sse4.cpp
index f1a7fefea3..bc69703607 100644
--- a/src/crypto/sha256_sse4.cpp
+++ b/src/crypto/sha256_sse4.cpp
@@ -5,8 +5,8 @@
 // This is a translation to GCC extended asm syntax from YASM code by Intel
 // (available at the bottom of this file).
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 #if defined(__x86_64__) || defined(__amd64__)
 
diff --git a/src/crypto/sha3.h b/src/crypto/sha3.h
index 88d8c1204d..78608eae76 100644
--- a/src/crypto/sha3.h
+++ b/src/crypto/sha3.h
@@ -7,8 +7,8 @@
 
 #include <span.h>
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 //! The Keccak-f[1600] transform.
 void KeccakF(uint64_t (&st)[25]);
diff --git a/src/crypto/sha512.h b/src/crypto/sha512.h
index 21ca930c75..7356dff6d9 100644
--- a/src/crypto/sha512.h
+++ b/src/crypto/sha512.h
@@ -5,8 +5,8 @@
 #ifndef BITCOIN_CRYPTO_SHA512_H
 #define BITCOIN_CRYPTO_SHA512_H
 
+#include <cstdlib>
 #include <stdint.h>
-#include <stdlib.h>
 
 /** A hasher class for SHA-512. */
 class CSHA512