From faf5162b60eab5402d3839330f985b84382df76c Mon Sep 17 00:00:00 2001
From: TuxSH <1922548+TuxSH@users.noreply.github.com>
Date: Wed, 13 Mar 2024 19:24:54 +0100
Subject: [PATCH] Fix PTMSYSM_CheckNew3DS, closes #540

---
 libctru/include/3ds/services/ptmsysm.h | 5 +++--
 libctru/source/services/ptmsysm.c      | 5 +++--
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/libctru/include/3ds/services/ptmsysm.h b/libctru/include/3ds/services/ptmsysm.h
index 253ca3d5a..f65eab971 100644
--- a/libctru/include/3ds/services/ptmsysm.h
+++ b/libctru/include/3ds/services/ptmsysm.h
@@ -109,9 +109,10 @@ Result PTMSYSM_GetRtcTime(s64 *outMsY2k);
 Result PTMSYSM_SetRtcTime(s64 msY2k);
 
 /**
- * @brief Returns 1 if it's a New 3DS, otherwise 0.
+ * @brief Checks whether the system is a New 3DS.
+ * @param[out] out Pointer to write the New 3DS flag to.
  */
-Result PTMSYSM_CheckNew3DS(void);
+Result PTMSYSM_CheckNew3DS(bool *out);
 
 /**
  * @brief Configures the New 3DS' CPU clock speed and L2 cache.
diff --git a/libctru/source/services/ptmsysm.c b/libctru/source/services/ptmsysm.c
index f376f0d2d..f7a9938ed 100644
--- a/libctru/source/services/ptmsysm.c
+++ b/libctru/source/services/ptmsysm.c
@@ -98,13 +98,14 @@ Result PTMSYSM_Awaken(void)
 	return (Result)cmdbuf[1];
 }
 
-Result PTMSYSM_CheckNew3DS(void)
+Result PTMSYSM_CheckNew3DS(bool *out)
 {
 	Result ret;
 	u32 *cmdbuf = getThreadCommandBuffer();
 	cmdbuf[0] = IPC_MakeHeader(0x040A,0,0); // 0x040A0000
 
-	if(R_FAILED(ret = svcSendSyncRequest(ptmSysmHandle)))return 0;
+	if(R_FAILED(ret = svcSendSyncRequest(ptmSysmHandle)))return ret;
+	*out = (bool)cmdbuf[2]; // if cmdbuf[1] is != 0 then this is uninitialized (this is fine)
 
 	return (Result)cmdbuf[1];
 }