ts_locale.h

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/*-------------------------------------------------------------------------
 *
 * ts_locale.h
 *      locale compatibility layer for tsearch
 *
 * Copyright (c) 1998-2026, PostgreSQL Global Development Group
 *
 * src/include/tsearch/ts_locale.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef __TSLOCALE_H__
#define __TSLOCALE_H__
 
#include <ctype.h>
#include <limits.h>
#include <wctype.h>
 
#include "lib/stringinfo.h"
#include "mb/pg_wchar.h"
#include "utils/pg_locale.h"
 
/* working state for tsearch_readline (should be a local var in caller) */
typedef struct
{
    FILE       *fp;
    const char *filename;
    int         lineno;
    StringInfoData buf;         /* current input line, in UTF-8 */
    char       *curline;        /* current input line, in DB's encoding */
    /* curline may be NULL, or equal to buf.data, or a palloc'd string */
    ErrorContextCallback cb;
} tsearch_readline_state;
 
#define TOUCHAR(x)  (*((const unsigned char *) (x)))
 
/* The second argument of t_iseq() must be a plain ASCII character */
#define t_iseq(x,c)     (TOUCHAR(x) == (unsigned char) (c))
 
/* Copy multibyte character of known byte length, return byte length. */
static inline int
ts_copychar_with_len(void *dest, const void *src, int length)
{
    memcpy(dest, src, length);
    return length;
}
 
/* Copy multibyte character from null-terminated string,  return byte length. */
static inline int
ts_copychar_cstr(void *dest, const void *src)
{
    return ts_copychar_with_len(dest, src, pg_mblen_cstr((const char *) src));
}
 
/* Historical macro for the above. */
#define COPYCHAR ts_copychar_cstr
 
#define GENERATE_T_ISCLASS_DECL(character_class) \
extern int  t_is##character_class##_with_len(const char *ptr, int len); \
extern int  t_is##character_class##_cstr(const char *ptr); \
extern int  t_is##character_class##_unbounded(const char *ptr); \
\
/* deprecated */ \
extern int  t_is##character_class(const char *ptr);
 
GENERATE_T_ISCLASS_DECL(alnum);
GENERATE_T_ISCLASS_DECL(alpha);
 
extern bool tsearch_readline_begin(tsearch_readline_state *stp,
                                   const char *filename);
extern char *tsearch_readline(tsearch_readline_state *stp);
extern void tsearch_readline_end(tsearch_readline_state *stp);
 
#endif                          /* __TSLOCALE_H__ */