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src/interfaces/ecpg/preproc/c_keywords.c
66 строк
2 KB
Peter Geoghegan
Harmonize parameter names in ecpg code.
22 сен 2022, 22:53
22 сен 2022, 22:53
3535ebc
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/*------------------------------------------------------------------------- * * c_keywords.c * lexical token lookup for reserved words in postgres embedded SQL * * src/interfaces/ecpg/preproc/c_keywords.c * *------------------------------------------------------------------------- */ #include "postgres_fe.h" /* ScanKeywordList lookup data for C keywords */ #include "c_kwlist_d.h" #include "preproc_extern.h" #include "preproc.h" /* Token codes for C keywords */ #define PG_KEYWORD(kwname, value) value, static const uint16 ScanCKeywordTokens[] = { #include "c_kwlist.h" }; #undef PG_KEYWORD /* * ScanCKeywordLookup - see if a given word is a keyword * * Returns the token value of the keyword, or -1 if no match. * * Do a hash search using plain strcmp() comparison. This is much like * ScanKeywordLookup(), except we want case-sensitive matching. */ int ScanCKeywordLookup(const char *text) { 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; }