fs/nls/nls_ucs2_utils.c

Source file repositories/reference/linux-study-clean/fs/nls/nls_ucs2_utils.c

File Facts

System: Linux kernel
Corpus path: fs/nls/nls_ucs2_utils.c
Extension: .c
Size: 6906 bytes
Lines: 148
Domain: Core OS
Bucket: VFS And Filesystem Core
Inferred role: Core OS: exported/initcall integration point
Status: integration implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/fs.h
linux/module.h
linux/slab.h
linux/unaligned.h
nls_ucs2_utils.h

Detected Declarations

export NlsUniUpperTable
export NlsUniUpperRange

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   Some of the source code in this file came from fs/cifs/uniupr.h
 *   Copyright (c) International Business Machines  Corp., 2000,2002
 *
 *   Some of the source code in this file came from fs/cifs/cifs_unicode.c
 *
 *   Copyright (c) International Business Machines  Corp., 2000,2009
 *   Modified by Steve French (sfrench@us.ibm.com)
 *   Modified by Namjae Jeon (linkinjeon@kernel.org)
 *
 */
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/unaligned.h>
#include "nls_ucs2_utils.h"

MODULE_DESCRIPTION("NLS UCS-2");
MODULE_LICENSE("GPL");

/*
 * Latin upper case
 */
signed char NlsUniUpperTable[512] = {
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 000-00f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 010-01f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 020-02f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 030-03f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 040-04f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 050-05f */
	0, -32, -32, -32, -32, -32, -32, -32, -32, -32, -32,
				-32, -32, -32, -32, -32,	/* 060-06f */
	-32, -32, -32, -32, -32, -32, -32, -32, -32, -32,
				-32, 0, 0, 0, 0, 0,	/* 070-07f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 080-08f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 090-09f */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0a0-0af */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0b0-0bf */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0c0-0cf */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	/* 0d0-0df */
	-32, -32, -32, -32, -32, -32, -32, -32, -32, -32,
			 -32, -32, -32, -32, -32, -32,	/* 0e0-0ef */
	-32, -32, -32, -32, -32, -32, -32, 0, -32, -32,
			 -32, -32, -32, -32, -32, 121,	/* 0f0-0ff */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 100-10f */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 110-11f */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 120-12f */
	0, 0, 0, -1, 0, -1, 0, -1, 0, 0, -1, 0, -1, 0, -1, 0,	/* 130-13f */
	-1, 0, -1, 0, -1, 0, -1, 0, -1, 0, 0, -1, 0, -1, 0, -1,	/* 140-14f */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 150-15f */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 160-16f */
	0, -1, 0, -1, 0, -1, 0, -1, 0, 0, -1, 0, -1, 0, -1, 0,	/* 170-17f */
	0, 0, 0, -1, 0, -1, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0,	/* 180-18f */
	0, 0, -1, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0,	/* 190-19f */
	0, -1, 0, -1, 0, -1, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0,	/* 1a0-1af */
	-1, 0, 0, 0, -1, 0, -1, 0, 0, -1, 0, 0, 0, -1, 0, 0,	/* 1b0-1bf */
	0, 0, 0, 0, 0, -1, -2, 0, -1, -2, 0, -1, -2, 0, -1, 0,	/* 1c0-1cf */
	-1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, -79, 0, -1, /* 1d0-1df */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 1e0-1ef */
	0, 0, -1, -2, 0, -1, 0, 0, 0, -1, 0, -1, 0, -1, 0, -1,	/* 1f0-1ff */
};
EXPORT_SYMBOL_GPL(NlsUniUpperTable);

/* Upper case range - Greek */
static signed char UniCaseRangeU03a0[47] = {
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -38, -37, -37, -37,	/* 3a0-3af */
	0, -32, -32, -32, -32, -32, -32, -32, -32, -32, -32, -32,
					 -32, -32, -32, -32,	/* 3b0-3bf */
	-32, -32, -31, -32, -32, -32, -32, -32, -32, -32, -32, -32, -64,
	-63, -63,
};

/* Upper case range - Cyrillic */
static signed char UniCaseRangeU0430[48] = {
	-32, -32, -32, -32, -32, -32, -32, -32, -32, -32, -32, -32,
					 -32, -32, -32, -32,	/* 430-43f */
	-32, -32, -32, -32, -32, -32, -32, -32, -32, -32, -32, -32,
					 -32, -32, -32, -32,	/* 440-44f */
	0, -80, -80, -80, -80, -80, -80, -80, -80, -80, -80,
					 -80, -80, 0, -80, -80,	/* 450-45f */
};

/* Upper case range - Extended cyrillic */
static signed char UniCaseRangeU0490[61] = {
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 490-49f */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 4a0-4af */
	0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1,	/* 4b0-4bf */
	0, 0, -1, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1,
};

Annotation

Immediate include surface: `linux/fs.h`, `linux/module.h`, `linux/slab.h`, `linux/unaligned.h`, `nls_ucs2_utils.h`.
Detected declarations: `export NlsUniUpperTable`, `export NlsUniUpperRange`.
Atlas domain: Core OS / VFS And Filesystem Core.
Implementation status: integration 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.