cannam@127: /*
cannam@127:  * Copyright (c) 2003, 2007-14 Matteo Frigo
cannam@127:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
cannam@127:  *
cannam@127:  * This program is free software; you can redistribute it and/or modify
cannam@127:  * it under the terms of the GNU General Public License as published by
cannam@127:  * the Free Software Foundation; either version 2 of the License, or
cannam@127:  * (at your option) any later version.
cannam@127:  *
cannam@127:  * This program is distributed in the hope that it will be useful,
cannam@127:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@127:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@127:  * GNU General Public License for more details.
cannam@127:  *
cannam@127:  * You should have received a copy of the GNU General Public License
cannam@127:  * along with this program; if not, write to the Free Software
cannam@127:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@127:  *
cannam@127:  */
cannam@127: 
cannam@127: #include "api.h"
cannam@127: #include <stdio.h>
cannam@127: 
cannam@127: /* getc()/putc() are *unbelievably* slow on linux.  Looks like glibc
cannam@127:    is grabbing a lock for each call to getc()/putc(), or something
cannam@127:    like that.  You pay the price for these idiotic posix threads
cannam@127:    whether you use them or not.
cannam@127: 
cannam@127:    So, we do our own buffering.  This completely defeats the purpose
cannam@127:    of having stdio in the first place, of course.
cannam@127: */
cannam@127:   
cannam@127: #define BUFSZ 256
cannam@127: 
cannam@127: typedef struct {
cannam@127:      scanner super;
cannam@127:      FILE *f;
cannam@127:      char buf[BUFSZ];
cannam@127:      char *bufr, *bufw;
cannam@127: } S;
cannam@127: 
cannam@127: static int getchr_file(scanner * sc_)
cannam@127: {
cannam@127:      S *sc = (S *) sc_;
cannam@127: 
cannam@127:      if (sc->bufr >= sc->bufw) {
cannam@127: 	  sc->bufr = sc->buf;
cannam@127: 	  sc->bufw = sc->buf + fread(sc->buf, 1, BUFSZ, sc->f);
cannam@127: 	  if (sc->bufr >= sc->bufw)
cannam@127: 	       return EOF;
cannam@127:      }
cannam@127: 
cannam@127:      return *(sc->bufr++);
cannam@127: }
cannam@127: 
cannam@127: static scanner *mkscanner_file(FILE *f)
cannam@127: {
cannam@127:      S *sc = (S *) X(mkscanner)(sizeof(S), getchr_file);
cannam@127:      sc->f = f;
cannam@127:      sc->bufr = sc->bufw = sc->buf;
cannam@127:      return &sc->super;
cannam@127: }
cannam@127: 
cannam@127: int X(import_wisdom_from_file)(FILE *input_file)
cannam@127: {
cannam@127:      scanner *s = mkscanner_file(input_file);
cannam@127:      planner *plnr = X(the_planner)();
cannam@127:      int ret = plnr->adt->imprt(plnr, s);
cannam@127:      X(scanner_destroy)(s);
cannam@127:      return ret;
cannam@127: }
cannam@127: 
cannam@127: int X(import_wisdom_from_filename)(const char *filename)
cannam@127: {
cannam@127:      FILE *f = fopen(filename, "r");
cannam@127:      int ret;
cannam@127:      if (!f) return 0; /* error opening file */
cannam@127:      ret = X(import_wisdom_from_file)(f);
cannam@127:      if (fclose(f)) ret = 0; /* error closing file */
cannam@127:      return ret;
cannam@127: }