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b9ec0339d8
Add const modifiers to a few struct nls_table's member pointers in include/linux/nls.h and adds a lot of const's in fs/nls/*.c files. Resulting changes as visible by size: text data bss dec hex filename 113612 481216 2368 597196 91ccc nls.org/built-in.o 593548 3296 288 597132 91c8c nls/built-in.o Apparently compiler managed to optimize code a bit better because of const-ness. No other changes are made. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#ifndef _LINUX_NLS_H
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#define _LINUX_NLS_H
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#include <linux/init.h>
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/* unicode character */
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typedef __u16 wchar_t;
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struct nls_table {
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const char *charset;
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const char *alias;
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int (*uni2char) (wchar_t uni, unsigned char *out, int boundlen);
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int (*char2uni) (const unsigned char *rawstring, int boundlen,
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wchar_t *uni);
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const unsigned char *charset2lower;
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const unsigned char *charset2upper;
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struct module *owner;
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struct nls_table *next;
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};
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/* this value hold the maximum octet of charset */
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#define NLS_MAX_CHARSET_SIZE 6 /* for UTF-8 */
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/* nls.c */
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extern int register_nls(struct nls_table *);
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extern int unregister_nls(struct nls_table *);
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extern struct nls_table *load_nls(char *);
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extern void unload_nls(struct nls_table *);
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extern struct nls_table *load_nls_default(void);
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extern int utf8_mbtowc(wchar_t *, const __u8 *, int);
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extern int utf8_mbstowcs(wchar_t *, const __u8 *, int);
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extern int utf8_wctomb(__u8 *, wchar_t, int);
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extern int utf8_wcstombs(__u8 *, const wchar_t *, int);
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static inline unsigned char nls_tolower(struct nls_table *t, unsigned char c)
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{
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unsigned char nc = t->charset2lower[c];
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return nc ? nc : c;
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}
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static inline unsigned char nls_toupper(struct nls_table *t, unsigned char c)
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{
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unsigned char nc = t->charset2upper[c];
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return nc ? nc : c;
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}
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static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1,
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const unsigned char *s2, int len)
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{
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while (len--) {
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if (nls_tolower(t, *s1++) != nls_tolower(t, *s2++))
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return 1;
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}
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return 0;
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}
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#define MODULE_ALIAS_NLS(name) MODULE_ALIAS("nls_" __stringify(name))
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#endif /* _LINUX_NLS_H */
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