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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 | ||
a4da2e3e DG |
23 | /* |
24 | * Like yylineno, this is the current open file pos. | |
25 | */ | |
26 | ||
ed95d745 | 27 | struct dtc_file *srcpos_file; |
a4da2e3e | 28 | |
ed95d745 DG |
29 | static int dtc_open_one(struct dtc_file *file, |
30 | const char *search, | |
31 | const char *fname) | |
a4da2e3e | 32 | { |
ed95d745 | 33 | char *fullname; |
a4da2e3e | 34 | |
ed95d745 DG |
35 | if (search) { |
36 | fullname = xmalloc(strlen(search) + strlen(fname) + 2); | |
a4da2e3e | 37 | |
ed95d745 DG |
38 | strcpy(fullname, search); |
39 | strcat(fullname, "/"); | |
40 | strcat(fullname, fname); | |
41 | } else { | |
42 | fullname = strdup(fname); | |
43 | } | |
a4da2e3e | 44 | |
ed95d745 DG |
45 | file->file = fopen(fullname, "r"); |
46 | if (!file->file) { | |
47 | free(fullname); | |
48 | return 0; | |
49 | } | |
a4da2e3e | 50 | |
ed95d745 DG |
51 | file->name = fullname; |
52 | return 1; | |
a4da2e3e DG |
53 | } |
54 | ||
55 | ||
ed95d745 DG |
56 | struct dtc_file *dtc_open_file(const char *fname, |
57 | const struct search_path *search) | |
58 | { | |
59 | static const struct search_path default_search = { NULL, NULL, NULL }; | |
a4da2e3e | 60 | |
ed95d745 DG |
61 | struct dtc_file *file; |
62 | const char *slash; | |
a4da2e3e | 63 | |
ed95d745 | 64 | file = xmalloc(sizeof(struct dtc_file)); |
a4da2e3e | 65 | |
ed95d745 DG |
66 | slash = strrchr(fname, '/'); |
67 | if (slash) { | |
68 | char *dir = xmalloc(slash - fname + 1); | |
69 | ||
70 | memcpy(dir, fname, slash - fname); | |
71 | dir[slash - fname] = 0; | |
72 | file->dir = dir; | |
73 | } else { | |
74 | file->dir = NULL; | |
a4da2e3e DG |
75 | } |
76 | ||
ed95d745 DG |
77 | if (streq(fname, "-")) { |
78 | file->name = "stdin"; | |
79 | file->file = stdin; | |
80 | return file; | |
a4da2e3e DG |
81 | } |
82 | ||
ed95d745 DG |
83 | if (fname[0] == '/') { |
84 | file->file = fopen(fname, "r"); | |
85 | if (!file->file) | |
86 | goto fail; | |
87 | ||
88 | file->name = strdup(fname); | |
89 | return file; | |
90 | } | |
a4da2e3e | 91 | |
ed95d745 DG |
92 | if (!search) |
93 | search = &default_search; | |
a4da2e3e | 94 | |
ed95d745 DG |
95 | while (search) { |
96 | if (dtc_open_one(file, search->dir, fname)) | |
97 | return file; | |
98 | ||
99 | if (errno != ENOENT) | |
100 | goto fail; | |
101 | ||
102 | search = search->next; | |
a4da2e3e DG |
103 | } |
104 | ||
ed95d745 DG |
105 | fail: |
106 | die("Couldn't open \"%s\": %s\n", fname, strerror(errno)); | |
a4da2e3e DG |
107 | } |
108 | ||
ed95d745 | 109 | void dtc_close_file(struct dtc_file *file) |
a4da2e3e | 110 | { |
ed95d745 DG |
111 | if (fclose(file->file)) |
112 | die("Error closing \"%s\": %s\n", file->name, strerror(errno)); | |
113 | ||
114 | free(file->dir); | |
115 | free(file); | |
a4da2e3e | 116 | } |