diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/tsearch/spell.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/src/backend/tsearch/spell.c b/src/backend/tsearch/spell.c index 9b9a9afaa89..68160bd5925 100644 --- a/src/backend/tsearch/spell.c +++ b/src/backend/tsearch/spell.c @@ -655,6 +655,17 @@ FindWord(IspellDict *Conf, const char *word, const char *affixflag, int flag) } /* + * Context reset/delete callback for a regular expression used in an affix + */ +static void +regex_affix_deletion_callback(void *arg) +{ + aff_regex_struct *pregex = (aff_regex_struct *) arg; + + pg_regfree(&(pregex->regex)); +} + +/* * Adds a new affix rule to the Affix field. * * Conf: current dictionary. @@ -716,6 +727,7 @@ NIAddAffix(IspellDict *Conf, const char *flag, char flagflags, const char *mask, int err; pg_wchar *wmask; char *tmask; + aff_regex_struct *pregex; Affix->issimple = 0; Affix->isregis = 0; @@ -729,18 +741,32 @@ NIAddAffix(IspellDict *Conf, const char *flag, char flagflags, const char *mask, wmask = (pg_wchar *) tmpalloc((masklen + 1) * sizeof(pg_wchar)); wmasklen = pg_mb2wchar_with_len(tmask, wmask, masklen); - err = pg_regcomp(&(Affix->reg.regex), wmask, wmasklen, + /* + * The regex engine stores its stuff using malloc not palloc, so we + * must arrange to explicitly clean up the regex when the dictionary's + * context is cleared. That means the regex_t has to stay in a fixed + * location within the context; we can't keep it directly in the AFFIX + * struct, since we may sort and resize the array of AFFIXes. + */ + Affix->reg.pregex = pregex = palloc(sizeof(aff_regex_struct)); + + err = pg_regcomp(&(pregex->regex), wmask, wmasklen, REG_ADVANCED | REG_NOSUB, DEFAULT_COLLATION_OID); if (err) { char errstr[100]; - pg_regerror(err, &(Affix->reg.regex), errstr, sizeof(errstr)); + pg_regerror(err, &(pregex->regex), errstr, sizeof(errstr)); ereport(ERROR, (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION), errmsg("invalid regular expression: %s", errstr))); } + + pregex->mcallback.func = regex_affix_deletion_callback; + pregex->mcallback.arg = (void *) pregex; + MemoryContextRegisterResetCallback(CurrentMemoryContext, + &pregex->mcallback); } Affix->flagflags = flagflags; @@ -2133,7 +2159,7 @@ CheckAffix(const char *word, size_t len, AFFIX *Affix, int flagflags, char *neww data = (pg_wchar *) palloc((newword_len + 1) * sizeof(pg_wchar)); data_len = pg_mb2wchar_with_len(newword, data, newword_len); - if (pg_regexec(&(Affix->reg.regex), data, data_len, + if (pg_regexec(&(Affix->reg.pregex->regex), data, data_len, 0, NULL, 0, NULL, 0) == REG_OKAY) { pfree(data); |