pcre16_study      634 ext/pcre/pcrelib/pcre.h PCRE_EXP_DECL pcre16_extra *pcre16_study(const pcre16 *, int, const char **);
pcre16_study     1453 ext/pcre/pcrelib/pcre_study.c pcre16_study(const pcre16 *external_re, int options, const char **errorptr)