Putc              381 ext/vport/vport.c     vtab.Putc = vport_putc;
Putc             1334 src/gauche.h       void      (*Putc)(ScmChar c, ScmPort *p);
Putc             1025 src/port.c         if (!p->src.vt.Putc)  p->src.vt.Putc = null_putc;
Putc              174 src/portapi.c          PORT_SAFE_CALL(p, p->src.vt.Putc(c, p));