c_keywords.c File Reference

#include "postgres_fe.h"
#include "c_kwlist_d.h"
#include "preproc_extern.h"
#include "preproc.h"
#include "c_kwlist.h"

Include dependency graph for c_keywords.c:

Go to the source code of this file.

Macros
#define	PG_KEYWORD(kwname, value)   value,

Functions
int	ScanCKeywordLookup (const char *text)

Variables
static const uint16	ScanCKeywordTokens []

Macro Definition Documentation

PG_KEYWORD

#define PG_KEYWORD	(		kwname,
			value
	)		value,

Definition at line 18 of file c_keywords.c.

Function Documentation

ScanCKeywordLookup()

int ScanCKeywordLookup

(

const char *

text

)

Definition at line 36 of file c_keywords.c.

{
    size_t      len;
    int         h;
    const char *kw;
 
    /*
     * Reject immediately if too long to be any keyword.  This saves useless
     * hashing work on long strings.
     */
    len = strlen(text);
    if (len > ScanCKeywords.max_kw_len)
        return -1;
 
    /*
     * Compute the hash function.  Since it's a perfect hash, we need only
     * match to the specific keyword it identifies.
     */
    h = ScanCKeywords_hash_func(text, len);
 
    /* An out-of-range result implies no match */
    if (h < 0 || h >= ScanCKeywords.num_keywords)
        return -1;
 
    kw = GetScanKeyword(h, &ScanCKeywords);
 
    if (strcmp(kw, text) == 0)
        return ScanCKeywordTokens[h];
 
    return -1;
}

References GetScanKeyword(), len, and ScanCKeywordTokens.

Variable Documentation

ScanCKeywordTokens

const uint16 ScanCKeywordTokens[]

static

Initial value:

= {
}

Definition at line 20 of file c_keywords.c.

Referenced by ScanCKeywordLookup().