1 /*
2 OW -- One-Wire filesystem
3 version 0.4 7/2/2003
4
5 Function naming scheme:
6 OW -- Generic call to interaface
7 LI -- LINK commands
8 L1 -- 2480B commands
9 FS -- filesystem commands
10 UT -- utility functions
11
12 Written 2003 Paul H Alfille
13 Fuse code based on "fusexmp" {GPL} by Miklos Szeredi, mszeredi@inf.bme.hu
14 Serial code based on "xt" {GPL} by David Querbach, www.realtime.bc.ca
15 in turn based on "miniterm" by Sven Goldt, goldt@math.tu.berlin.de
16 GPL license
17 This program is free software; you can redistribute it and/or
18 modify it under the terms of the GNU General Public License
19 as published by the Free Software Foundation; either version 2
20 of the License, or (at your option) any later version.
21
22 This program is distributed in the hope that it will be useful,
23 but WITHOUT ANY WARRANTY; without even the implied warranty of
24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 GNU General Public License for more details.
26
27 Other portions based on Dallas Semiconductor Public Domain Kit,
28 ---------------------------------------------------------------------------
29 Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
30 Permission is hereby granted, free of charge, to any person obtaining a
31 copy of this software and associated documentation files (the "Software"),
32 to deal in the Software without restriction, including without limitation
33 the rights to use, copy, modify, merge, publish, distribute, sublicense,
34 and/or sell copies of the Software, and to permit persons to whom the
35 Software is furnished to do so, subject to the following conditions:
36 The above copyright notice and this permission notice shall be included
37 in all copies or substantial portions of the Software.
38 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
39 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
40 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
41 IN NO EVENT SHALL DALLAS SEMICONDUCTOR BE LIABLE FOR ANY CLAIM, DAMAGES
42 OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
43 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
44 OTHER DEALINGS IN THE SOFTWARE.
45 Except as contained in this notice, the name of Dallas Semiconductor
46 shall not be used except as stated in the Dallas Semiconductor
47 Branding Policy.
48 ---------------------------------------------------------------------------
49 Implementation:
50 2006 dirblob
51 */
52
53 #include <config.h>
54 #include "owfs_config.h"
55 #include "ow.h"
56
57 /*
58 A "charblob" is a structure holding a list of files
59
60 Most interesting, it allocates memory dynamically.
61 */
62
CharblobClear(struct charblob * cb)63 void CharblobClear(struct charblob *cb)
64 {
65 if (cb->blob) {
66 free(cb->blob);
67 }
68 CharblobInit(cb);
69 }
70
CharblobInit(struct charblob * cb)71 void CharblobInit(struct charblob *cb)
72 {
73 cb->used = 0;
74 cb->allocated = 0;
75 cb->blob = 0;
76 cb->troubled = 0;
77 }
78
CharblobPure(struct charblob * cb)79 int CharblobPure(struct charblob *cb)
80 {
81 return !cb->troubled;
82 }
83
CharblobAdd(const ASCII * a,size_t s,struct charblob * cb)84 int CharblobAdd(const ASCII * a, size_t s, struct charblob *cb)
85 {
86 size_t incr = 1024;
87 if (incr < s)
88 incr = s;
89 // make more room? -- blocks of 1k
90 if (cb->used)
91 CharblobAddChar(',', cb); // add a comma
92 if (cb->used + s > cb->allocated) {
93 int newalloc = cb->allocated + incr;
94 ASCII *temp = realloc(cb->blob, newalloc);
95 if (temp) {
96 memset(&temp[cb->allocated], 0, incr); // set the new memory to blank
97 cb->allocated = newalloc;
98 cb->blob = temp;
99 } else { // allocation failed -- keep old
100 cb->troubled = 1;
101 return -ENOMEM;
102 }
103 }
104 memcpy(&cb->blob[cb->used], a, s);
105 cb->used += s;
106 return 0;
107 }
108
CharblobAddChar(ASCII a,struct charblob * cb)109 int CharblobAddChar(ASCII a, struct charblob *cb)
110 {
111 // make more room? -- blocks of 1k
112 if (cb->used + 1 > cb->allocated) {
113 int newalloc = cb->allocated + 1024;
114 ASCII *temp = realloc(cb->blob, newalloc);
115 if (temp) {
116 memset(&temp[cb->allocated], 0, 1024); // set the new memory to blank
117 cb->allocated = newalloc;
118 cb->blob = temp;
119 } else { // allocation failed -- keep old
120 cb->troubled = 1;
121 return -ENOMEM;
122 }
123 }
124 cb->blob[cb->used] = a;
125 ++cb->used;
126 return 0;
127 }
128
CharblobLength(struct charblob * cb)129 size_t CharblobLength( struct charblob * cb )
130 {
131 return cb->used ;
132 }
133
CharblobData(struct charblob * cb)134 ASCII * CharblobData(struct charblob * cb)
135 {
136 return cb->blob ;
137 }
138