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105 lines
2.3 KiB
105 lines
2.3 KiB
/*
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* Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include "dtc.h"
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#include "srcpos.h"
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/*
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* Record the complete unique set of opened file names.
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* Primarily used to cache source position file names.
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*/
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#define MAX_N_FILE_NAMES (100)
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const char *file_names[MAX_N_FILE_NAMES];
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static int n_file_names = 0;
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/*
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* Like yylineno, this is the current open file pos.
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*/
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int srcpos_filenum = -1;
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FILE *dtc_open_file(const char *fname)
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{
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FILE *f;
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if (lookup_file_name(fname, 1) < 0)
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die("Too many files opened\n");
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if (streq(fname, "-"))
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f = stdin;
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else
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f = fopen(fname, "r");
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if (! f)
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die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
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return f;
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}
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/*
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* Locate and optionally add filename fname in the file_names[] array.
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*
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* If the filename is currently not in the array and the boolean
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* add_it is non-zero, an attempt to add the filename will be made.
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*
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* Returns;
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* Index [0..MAX_N_FILE_NAMES) where the filename is kept
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* -1 if the name can not be recorded
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*/
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int lookup_file_name(const char *fname, int add_it)
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{
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int i;
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for (i = 0; i < n_file_names; i++) {
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if (strcmp(file_names[i], fname) == 0)
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return i;
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}
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if (add_it) {
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if (n_file_names < MAX_N_FILE_NAMES) {
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file_names[n_file_names] = strdup(fname);
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return n_file_names++;
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}
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}
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return -1;
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}
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const char *srcpos_filename_for_num(int filenum)
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{
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if (0 <= filenum && filenum < n_file_names) {
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return file_names[filenum];
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}
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return 0;
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}
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const char *srcpos_get_filename(void)
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{
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return srcpos_filename_for_num(srcpos_filenum);
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}
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