lib/lz4/lz4defs.h

File Facts

System

Linux kernel

Corpus path

lib/lz4/lz4defs.h

Extension

.h

Size

6812 bytes

Lines

248

Domain

Kernel Services

Bucket

lib

Inferred role

Kernel Services: implementation source

Status

source implementation candidate

Why This File Exists

Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

• Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.

Dependency Surface

• linux/unaligned.h
• linux/bitops.h
• linux/string.h
• linux/lz4.h
• linux/types.h

Detected Declarations

• function LZ4_read16
• function LZ4_read32
• function LZ4_read_ARCH
• function LZ4_write16
• function LZ4_write32
• function LZ4_readLE16
• function LZ4_writeLE16
• function LZ4_copy8
• function LZ4_wildCopy
• function LZ4_NbCommonBytes
• function LZ4_count

Annotated Snippet

if (!diff) {
			pIn += STEPSIZE;
			pMatch += STEPSIZE;
			continue;
		}

		pIn += LZ4_NbCommonBytes(diff);

		return (unsigned int)(pIn - pStart);
	}

#if LZ4_ARCH64
	if ((pIn < (pInLimit - 3))
		&& (LZ4_read32(pMatch) == LZ4_read32(pIn))) {
		pIn += 4;
		pMatch += 4;
	}
#endif

	if ((pIn < (pInLimit - 1))
		&& (LZ4_read16(pMatch) == LZ4_read16(pIn))) {
		pIn += 2;
		pMatch += 2;
	}

	if ((pIn < pInLimit) && (*pMatch == *pIn))
		pIn++;

	return (unsigned int)(pIn - pStart);
}

typedef enum { noLimit = 0, limitedOutput = 1 } limitedOutput_directive;
typedef enum { byPtr, byU32, byU16 } tableType_t;

typedef enum { noDict = 0, withPrefix64k, usingExtDict } dict_directive;
typedef enum { noDictIssue = 0, dictSmall } dictIssue_directive;

typedef enum { endOnOutputSize = 0, endOnInputSize = 1 } endCondition_directive;
typedef enum { decode_full_block = 0, partial_decode = 1 } earlyEnd_directive;

#define LZ4_STATIC_ASSERT(c)	BUILD_BUG_ON(!(c))

#endif

Annotation

• Immediate include surface: `linux/unaligned.h`, `linux/bitops.h`, `linux/string.h`, `linux/lz4.h`, `linux/types.h`.
• Detected declarations: `function LZ4_read16`, `function LZ4_read32`, `function LZ4_read_ARCH`, `function LZ4_write16`, `function LZ4_write32`, `function LZ4_readLE16`, `function LZ4_writeLE16`, `function LZ4_copy8`, `function LZ4_wildCopy`, `function LZ4_NbCommonBytes`.
• Atlas domain: Kernel Services / lib.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.