cregit-Linux how code gets into the kernel

Release 4.7 include/linux/nls.h

Directory: include/linux
#ifndef _LINUX_NLS_H

#define _LINUX_NLS_H

#include <linux/init.h>

/* Unicode has changed over the years.  Unicode code points no longer
 * fit into 16 bits; as of Unicode 5 valid code points range from 0
 * to 0x10ffff (17 planes, where each plane holds 65536 code points).
 *
 * The original decision to represent Unicode characters as 16-bit
 * wchar_t values is now outdated.  But plane 0 still includes the
 * most commonly used characters, so we will retain it.  The newer
 * 32-bit unicode_t type can be used when it is necessary to
 * represent the full Unicode character set.
 */

/* Plane-0 Unicode character */
typedef u16 wchar_t;

#define MAX_WCHAR_T	0xffff

/* Arbitrary Unicode character */

typedef u32 unicode_t;


struct nls_table {
	
const char *charset;
	
const char *alias;
	
int (*uni2char) (wchar_t uni, unsigned char *out, int boundlen);
	
int (*char2uni) (const unsigned char *rawstring, int boundlen,
			 wchar_t *uni);
	
const unsigned char *charset2lower;
	
const unsigned char *charset2upper;
	
struct module *owner;
	
struct nls_table *next;
};

/* this value hold the maximum octet of charset */

#define NLS_MAX_CHARSET_SIZE 6 
/* for UTF-8 */

/* Byte order for UTF-16 strings */

enum utf16_endian {
	
UTF16_HOST_ENDIAN,
	
UTF16_LITTLE_ENDIAN,
	
UTF16_BIG_ENDIAN
};

/* nls_base.c */
extern int __register_nls(struct nls_table *, struct module *);
extern int unregister_nls(struct nls_table *);
extern struct nls_table *load_nls(char *);
extern void unload_nls(struct nls_table *);
extern struct nls_table *load_nls_default(void);

#define register_nls(nls) __register_nls((nls), THIS_MODULE)

extern int utf8_to_utf32(const u8 *s, int len, unicode_t *pu);
extern int utf32_to_utf8(unicode_t u, u8 *s, int maxlen);
extern int utf8s_to_utf16s(const u8 *s, int len,
		enum utf16_endian endian, wchar_t *pwcs, int maxlen);
extern int utf16s_to_utf8s(const wchar_t *pwcs, int len,
		enum utf16_endian endian, u8 *s, int maxlen);


static inline unsigned char nls_tolower(struct nls_table *t, unsigned char c) { unsigned char nc = t->charset2lower[c]; return nc ? nc : c; }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig35100.00%1100.00%
Total35100.00%1100.00%


static inline unsigned char nls_toupper(struct nls_table *t, unsigned char c) { unsigned char nc = t->charset2upper[c]; return nc ? nc : c; }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig35100.00%1100.00%
Total35100.00%1100.00%


static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1, const unsigned char *s2, int len) { while (len--) { if (nls_tolower(t, *s1++) != nls_tolower(t, *s2++)) return 1; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig60100.00%1100.00%
Total60100.00%1100.00%

/* * nls_nullsize - return length of null character for codepage * @codepage - codepage for which to return length of NULL terminator * * Since we can't guarantee that the null terminator will be a particular * length, we have to check against the codepage. If there's a problem * determining it, assume a single-byte NULL terminator. */
static inline int nls_nullsize(const struct nls_table *codepage) { int charlen; char tmp[NLS_MAX_CHARSET_SIZE]; charlen = codepage->uni2char(0, tmp, NLS_MAX_CHARSET_SIZE); return charlen > 0 ? charlen : 1; }

Contributors

PersonTokensPropCommitsCommitProp
jeff laytonjeff layton44100.00%1100.00%
Total44100.00%1100.00%

#define MODULE_ALIAS_NLS(name) MODULE_ALIAS("nls_" __stringify(name)) #endif /* _LINUX_NLS_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git15835.99%430.77%
christoph hellwigchristoph hellwig13029.61%17.69%
alan sternalan stern6815.49%215.38%
jeff laytonjeff layton4510.25%17.69%
al viroal viro122.73%17.69%
andrew mortonandrew morton112.51%17.69%
linus torvaldslinus torvalds92.05%17.69%
denys vlasenkodenys vlasenko40.91%17.69%
liyang huliyang hu20.46%17.69%
Total439100.00%13100.00%
Directory: include/linux
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