fromc            1439 src/extlib.c     long fromc = -1, toc = -1;
fromc            1440 src/extlib.c     if (SCM_EXACTP(from)) fromc = Scm_GetInteger(from);
fromc            1441 src/extlib.c     else if (SCM_CHARP(from)) fromc = SCM_CHAR_VALUE(from);
fromc            1442 src/extlib.c     if (fromc < 0) Scm_Error("character or positive integer required, but got %S", from);
fromc            1443 src/extlib.c     if (fromc > SCM_CHAR_MAX) Scm_Error("argument out of range: %S", from);
fromc            1448 src/extlib.c     SCM_RETURN(Scm_CharSetAddRange(cs, (ScmChar)fromc, (ScmChar)toc));