Correctly locate part range in which read data. #1956

Job	Run time
OSSF Scorecard	21s
macOS (macos-13, macos-aarch64-dyn)	1m 27s
Linux (linux-x86_64-static, true)	3m 50s
macOS (macos-13, macos-x86_64-dyn)	3m 54s
Linux (linux-x86_64-static, false)	2m 37s
macOS (macos-13, ios-arm64-dyn)	1m 12s
Windows	10m 19s
Linux (linux-x86_64-dyn, true)	3m 43s
macOS (macos-13, ios-x86_64-dyn)	1m 27s
Linux (linux-x86_64-dyn, false)	2m 18s
macOS (macos-14, macos-aarch64-dyn)	50s
Linux (linux-aarch64-musl-dyn, true)	3m 0s
macOS (macos-14, ios-arm64-dyn)	51s
Linux (linux-aarch64-musl-dyn, false)	1m 49s
macOS (macos-14, ios-x86_64-dyn)	46s
Linux (linux-aarch64-dyn, true)	1m 7s
Linux (linux-aarch64-dyn, false)	1m 5s
Linux (android-arm, true)	1m 38s
Linux (android-arm, false)	1m 37s
Linux (android-arm64, true)	1m 49s
Linux (android-arm64, false)	1m 57s
Linux (win32-static, true)	38s
Linux (win32-static, false)	44s
Linux (win32-dyn, true)	38s
Linux (win32-dyn, false)	36s
Linux (wasm, true)	1m 16s
Linux (wasm, false)	1m 27s
	52m 56s

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