crc32.c File Reference

#include "postgres.h"
#include "ltree.h"
#include "crc32.h"
#include "utils/pg_crc.h"
#include "utils/pg_locale.h"

Include dependency graph for crc32.c:

Go to the source code of this file.

Functions
unsigned int	ltree_crc32_sz (const char *buf, int size)

Function Documentation

ltree_crc32_sz()

unsigned int ltree_crc32_sz	(	const char *	buf,
		int	size
	)

Definition at line 22 of file crc32.c.

{
    pg_crc32    crc;
    const char *p = buf;
    static pg_locale_t locale = NULL;
 
    if (!locale)
        locale = pg_database_locale();
 
    INIT_TRADITIONAL_CRC32(crc);
    while (size > 0)
    {
        char        foldstr[UNICODE_CASEMAP_BUFSZ];
        int         srclen = pg_mblen(p);
        size_t      foldlen;
 
        /* fold one codepoint at a time */
        foldlen = pg_strfold(foldstr, UNICODE_CASEMAP_BUFSZ, p, srclen,
                             locale);
 
        COMP_TRADITIONAL_CRC32(crc, foldstr, foldlen);
 
        size -= srclen;
        p += srclen;
    }
    FIN_TRADITIONAL_CRC32(crc);
    return (unsigned int) crc;
}

References buf, COMP_TRADITIONAL_CRC32, crc, FIN_TRADITIONAL_CRC32, INIT_TRADITIONAL_CRC32, locale, pg_database_locale(), pg_mblen(), pg_strfold(), and UNICODE_CASEMAP_BUFSZ.

Referenced by gist_te(), hashing(), parse_lquery(), and pushval_asis().