mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-28 07:23:01 +00:00
82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2003, 2007-14 Matteo Frigo
|
||
|
|
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "api/api.h"
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
/* getc()/putc() are *unbelievably* slow on linux. Looks like glibc
|
||
|
|
is grabbing a lock for each call to getc()/putc(), or something
|
||
|
|
like that. You pay the price for these idiotic posix threads
|
||
|
|
whether you use them or not.
|
||
|
|
|
||
|
|
So, we do our own buffering. This completely defeats the purpose
|
||
|
|
of having stdio in the first place, of course.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define BUFSZ 256
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
scanner super;
|
||
|
|
FILE *f;
|
||
|
|
char buf[BUFSZ];
|
||
|
|
char *bufr, *bufw;
|
||
|
|
} S;
|
||
|
|
|
||
|
|
static int getchr_file(scanner * sc_)
|
||
|
|
{
|
||
|
|
S *sc = (S *) sc_;
|
||
|
|
|
||
|
|
if (sc->bufr >= sc->bufw) {
|
||
|
|
sc->bufr = sc->buf;
|
||
|
|
sc->bufw = sc->buf + fread(sc->buf, 1, BUFSZ, sc->f);
|
||
|
|
if (sc->bufr >= sc->bufw)
|
||
|
|
return EOF;
|
||
|
|
}
|
||
|
|
|
||
|
|
return *(sc->bufr++);
|
||
|
|
}
|
||
|
|
|
||
|
|
static scanner *mkscanner_file(FILE *f)
|
||
|
|
{
|
||
|
|
S *sc = (S *) X(mkscanner)(sizeof(S), getchr_file);
|
||
|
|
sc->f = f;
|
||
|
|
sc->bufr = sc->bufw = sc->buf;
|
||
|
|
return &sc->super;
|
||
|
|
}
|
||
|
|
|
||
|
|
int X(import_wisdom_from_file)(FILE *input_file)
|
||
|
|
{
|
||
|
|
scanner *s = mkscanner_file(input_file);
|
||
|
|
planner *plnr = X(the_planner)();
|
||
|
|
int ret = plnr->adt->imprt(plnr, s);
|
||
|
|
X(scanner_destroy)(s);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int X(import_wisdom_from_filename)(const char *filename)
|
||
|
|
{
|
||
|
|
FILE *f = fopen(filename, "r");
|
||
|
|
int ret;
|
||
|
|
if (!f) return 0; /* error opening file */
|
||
|
|
ret = X(import_wisdom_from_file)(f);
|
||
|
|
if (fclose(f)) ret = 0; /* error closing file */
|
||
|
|
return ret;
|
||
|
|
}
|