pcre16_callout_block  500 ext/pcre/pcrelib/pcre.h PCRE_EXP_DECL int   (*pcre16_callout)(pcre16_callout_block *);
pcre16_callout_block  521 ext/pcre/pcrelib/pcre.h PCRE_EXP_DECL int   pcre16_callout(pcre16_callout_block *);