mirror of
git://git.gnupg.org/gnupg.git
synced 2024-10-31 20:08:43 +01:00
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
|
#ifndef UTF8_UTIL_H
|
||
|
|
#define UTF8_UTIL_H
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/**
|
||
|
|
* UTF-8 utility functions
|
||
|
|
*
|
||
|
|
* (c) 2010-2016 Steve Bennett <steveb@workware.net.au>
|
||
|
|
*
|
||
|
|
* See LICENCE for licence details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Currently we support unicode points up to 2^22-1 */
|
||
|
|
#define MAX_UTF8_LEN 4
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts the given unicode codepoint (0 - 0x1fffff) to utf-8
|
||
|
|
* and stores the result at 'p'.
|
||
|
|
*
|
||
|
|
* Returns the number of utf-8 characters (up to MAX_UTF8_LEN).
|
||
|
|
*/
|
||
|
|
int utf8_fromunicode(char *p, unsigned uc);
|
||
|
|
|
||
|
|
#ifndef JIM_UTF8
|
||
|
|
#include <ctype.h>
|
||
|
|
|
||
|
|
/* No utf-8 support. 1 byte = 1 char */
|
||
|
|
#define utf8_tounicode(S, CP) (*(CP) = (unsigned char)*(S), 1)
|
||
|
|
#define utf8_getchars(CP, C) (*(CP) = (C), 1)
|
||
|
|
#define utf8_upper(C) toupper(C)
|
||
|
|
#define utf8_index(C, I) (I)
|
||
|
|
#define utf8_charlen(C) 1
|
||
|
|
|
||
|
|
#else
|
||
|
|
#if !defined(JIM_BOOTSTRAP)
|
||
|
|
|
||
|
|
#define utf8_getchars utf8_fromunicode
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the length of the utf-8 sequence starting with 'c'.
|
||
|
|
*
|
||
|
|
* Returns 1-4.
|
||
|
|
* If 'c' is not a valid start byte, returns 1.
|
||
|
|
*/
|
||
|
|
int utf8_charlen(int c);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the byte index of the given character in the utf-8 string.
|
||
|
|
*
|
||
|
|
* The string *must* be null terminated.
|
||
|
|
*
|
||
|
|
* This will return the byte length of a utf-8 string
|
||
|
|
* if given the char length.
|
||
|
|
*/
|
||
|
|
int utf8_index(const char *str, int charindex);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the unicode codepoint corresponding to the
|
||
|
|
* utf-8 sequence 'str'.
|
||
|
|
*
|
||
|
|
* Stores the result in *uc and returns the number of bytes
|
||
|
|
* consumed.
|
||
|
|
*
|
||
|
|
* If 'str' is null terminated, then an invalid utf-8 sequence
|
||
|
|
* at the end of the string will be returned as individual bytes.
|
||
|
|
*
|
||
|
|
* If it is not null terminated, the length *must* be checked first.
|
||
|
|
*
|
||
|
|
* Does not support unicode code points > \u1fffff
|
||
|
|
*/
|
||
|
|
int utf8_tounicode(const char *str, int *uc);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the upper-case variant of the given unicode codepoint.
|
||
|
|
*
|
||
|
|
* Unicode code points > \uffff are returned unchanged.
|
||
|
|
*/
|
||
|
|
int utf8_upper(int uc);
|
||
|
|
#endif /* JIM_BOOTSTRAP */
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|