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a4da2e3e DG |
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 | ||
30 | const char *file_names[MAX_N_FILE_NAMES]; | |
31 | static int n_file_names = 0; | |
32 | ||
33 | /* | |
34 | * Like yylineno, this is the current open file pos. | |
35 | */ | |
36 | ||
37 | int srcpos_filenum = -1; | |
38 | ||
39 | ||
40 | ||
41 | FILE *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 | ||
72 | int 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 | ||
92 | const 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 | ||
102 | const char *srcpos_get_filename(void) | |
103 | { | |
104 | return srcpos_filename_for_num(srcpos_filenum); | |
105 | } |