diff options
Diffstat (limited to 'contrib/fuzzystrmatch/fuzzystrmatch.c')
| -rw-r--r-- | contrib/fuzzystrmatch/fuzzystrmatch.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/contrib/fuzzystrmatch/fuzzystrmatch.c b/contrib/fuzzystrmatch/fuzzystrmatch.c index 78d49b9ac95..733f3215a2d 100644 --- a/contrib/fuzzystrmatch/fuzzystrmatch.c +++ b/contrib/fuzzystrmatch/fuzzystrmatch.c @@ -202,6 +202,8 @@ levenshtein(PG_FUNCTION_ARGS) * Returns number of characters requested * (suggested value is 4) */ +#define GET_TEXT(cstrp) DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(cstrp))) + PG_FUNCTION_INFO_V1(metaphone); Datum metaphone(PG_FUNCTION_ARGS) @@ -216,6 +218,10 @@ metaphone(PG_FUNCTION_ARGS) str_i = DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(PG_GETARG_TEXT_P(0)))); str_i_len = strlen(str_i); + /* return an empty string if we receive one */ + if (!(str_i_len > 0)) + PG_RETURN_TEXT_P(GET_TEXT("")); + if (str_i_len > MAX_METAPHONE_STRLEN) ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE), |