ecpg_keywords.c

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/*-------------------------------------------------------------------------
 *
 * ecpg_keywords.c
 *    lexical token lookup for reserved words in postgres embedded SQL
 *
 * IDENTIFICATION
 *    src/interfaces/ecpg/preproc/ecpg_keywords.c
 *
 *-------------------------------------------------------------------------
 */
 
#include "postgres_fe.h"
 
#include <ctype.h>
 
/* ScanKeywordList lookup data for ECPG keywords */
#include "ecpg_kwlist_d.h"
#include "preproc_extern.h"
#include "preproc.h"
 
/* Token codes for ECPG keywords */
#define PG_KEYWORD(kwname, value) value,
 
static const uint16 ECPGScanKeywordTokens[] = {
#include "ecpg_kwlist.h"
};
 
#undef PG_KEYWORD
 
 
/*
 * ScanECPGKeywordLookup - see if a given word is a keyword
 *
 * Returns the token value of the keyword, or -1 if no match.
 *
 * Keywords are matched using the same case-folding rules as in the backend.
 */
int
ScanECPGKeywordLookup(const char *text)
{
    int         kwnum;
 
    /* First check SQL symbols defined by the backend. */
    kwnum = ScanKeywordLookup(text, &ScanKeywords);
    if (kwnum >= 0)
        return SQLScanKeywordTokens[kwnum];
 
    /* Try ECPG-specific keywords. */
    kwnum = ScanKeywordLookup(text, &ScanECPGKeywords);
    if (kwnum >= 0)
        return ECPGScanKeywordTokens[kwnum];
 
    return -1;
}