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authorIngo Molnar <mingo@elte.hu>2009-05-07 05:17:13 -0400
committerIngo Molnar <mingo@elte.hu>2009-05-07 05:17:34 -0400
commit44347d947f628060b92449702071bfe1d31dfb75 (patch)
treec6ed74610d5b3295df4296659f80f5feb94b28cc /scripts/dtc/srcpos.c
parentd94fc523f3c35bd8013f04827e94756cbc0212f4 (diff)
parent413f81eba35d6ede9289b0c8a920c013a84fac71 (diff)
Merge branch 'linus' into tracing/core
Merge reason: tracing/core was on a .30-rc1 base and was missing out on on a handful of tracing fixes present in .30-rc5-almost. Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'scripts/dtc/srcpos.c')
-rw-r--r--scripts/dtc/srcpos.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/scripts/dtc/srcpos.c b/scripts/dtc/srcpos.c
new file mode 100644
index 000000000000..9641b7628b4d
--- /dev/null
+++ b/scripts/dtc/srcpos.c
@@ -0,0 +1,116 @@
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 * Like yylineno, this is the current open file pos.
25 */
26
27struct dtc_file *srcpos_file;
28
29static int dtc_open_one(struct dtc_file *file,
30 const char *search,
31 const char *fname)
32{
33 char *fullname;
34
35 if (search) {
36 fullname = xmalloc(strlen(search) + strlen(fname) + 2);
37
38 strcpy(fullname, search);
39 strcat(fullname, "/");
40 strcat(fullname, fname);
41 } else {
42 fullname = strdup(fname);
43 }
44
45 file->file = fopen(fullname, "r");
46 if (!file->file) {
47 free(fullname);
48 return 0;
49 }
50
51 file->name = fullname;
52 return 1;
53}
54
55
56struct 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 };
60
61 struct dtc_file *file;
62 const char *slash;
63
64 file = xmalloc(sizeof(struct dtc_file));
65
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;
75 }
76
77 if (streq(fname, "-")) {
78 file->name = "stdin";
79 file->file = stdin;
80 return file;
81 }
82
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 }
91
92 if (!search)
93 search = &default_search;
94
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;
103 }
104
105fail:
106 die("Couldn't open \"%s\": %s\n", fname, strerror(errno));
107}
108
109void dtc_close_file(struct dtc_file *file)
110{
111 if (fclose(file->file))
112 die("Error closing \"%s\": %s\n", file->name, strerror(errno));
113
114 free(file->dir);
115 free(file);
116}