From 7d7a36dae4fb47be1009986071fedd926e7868de Mon Sep 17 00:00:00 2001
From: Marco <9968523+marcoffee@users.noreply.github.com>
Date: Wed, 1 Jan 2025 07:09:30 -0300
Subject: [PATCH] Add support for big-endian CPUs (#14)

---
 TinyEXIF.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/TinyEXIF.cpp b/TinyEXIF.cpp
index 2fadd6a..c69fb42 100644
--- a/TinyEXIF.cpp
+++ b/TinyEXIF.cpp
@@ -943,12 +943,14 @@ int EXIFInfo::parseFromEXIFSegment(const uint8_t* buf, unsigned len) {
 	//  8 bytes
 	if (offs + 8 > len)
 		return PARSE_CORRUPT_DATA;
+	const uint32_t _ONE32 = 1;
+	const bool IS_LITTLE_ENDIAN = reinterpret_cast<uint8_t const*>(&_ONE32)[0] == 1;
 	bool alignIntel;
 	if (buf[offs] == 'I' && buf[offs+1] == 'I')
-		alignIntel = true; // 1: Intel byte alignment
+		alignIntel = IS_LITTLE_ENDIAN; // 1: Intel byte alignment
 	else
 	if (buf[offs] == 'M' && buf[offs+1] == 'M')
-		alignIntel = false; // 0: Motorola byte alignment
+		alignIntel = !IS_LITTLE_ENDIAN; // 0: Motorola byte alignment
 	else
 		return PARSE_UNKNOWN_BYTEALIGN;
 	EntryParser parser(buf, len, offs, alignIntel);