Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1/*
2 * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17 * USA
18 */
19
20#include "dtc.h"
21#include "srcpos.h"
22
23
24/*
25 * Record the complete unique set of opened file names.
26 * Primarily used to cache source position file names.
27 */
28#define MAX_N_FILE_NAMES (100)
29
30const char *file_names[MAX_N_FILE_NAMES];
31static int n_file_names = 0;
32
33/*
34 * Like yylineno, this is the current open file pos.
35 */
36
37int srcpos_filenum = -1;
38
39
40
41FILE *dtc_open_file(const char *fname)
42{
43 FILE *f;
44
45 if (lookup_file_name(fname, 1) < 0)
46 die("Too many files opened\n");
47
48 if (streq(fname, "-"))
49 f = stdin;
50 else
51 f = fopen(fname, "r");
52
53 if (! f)
54 die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
55
56 return f;
57}
58
59
60
61/*
62 * Locate and optionally add filename fname in the file_names[] array.
63 *
64 * If the filename is currently not in the array and the boolean
65 * add_it is non-zero, an attempt to add the filename will be made.
66 *
67 * Returns;
68 * Index [0..MAX_N_FILE_NAMES) where the filename is kept
69 * -1 if the name can not be recorded
70 */
71
72int lookup_file_name(const char *fname, int add_it)
73{
74 int i;
75
76 for (i = 0; i < n_file_names; i++) {
77 if (strcmp(file_names[i], fname) == 0)
78 return i;
79 }
80
81 if (add_it) {
82 if (n_file_names < MAX_N_FILE_NAMES) {
83 file_names[n_file_names] = strdup(fname);
84 return n_file_names++;
85 }
86 }
87
88 return -1;
89}
90
91
92const char *srcpos_filename_for_num(int filenum)
93{
94 if (0 <= filenum && filenum < n_file_names) {
95 return file_names[filenum];
96 }
97
98 return 0;
99}
100
101
102const char *srcpos_get_filename(void)
103{
104 return srcpos_filename_for_num(srcpos_filenum);
105}