1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/* blob.c - Alpine Package Keeper (APK)
*
* Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
* Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation. See http://www.gnu.org/ for details.
*/
#include <malloc.h>
#include <string.h>
#include "apk_blob.h"
char *apk_blob_cstr(apk_blob_t blob)
{
char *cstr;
if (blob.ptr == NULL)
return strdup("");
if (blob.ptr[blob.len-1] == 0)
return strdup(blob.ptr);
cstr = malloc(blob.len + 1);
memcpy(cstr, blob.ptr, blob.len);
cstr[blob.len] = 0;
return cstr;
}
int apk_blob_spn(apk_blob_t blob, const char *accept, apk_blob_t *l, apk_blob_t *r)
{
int i;
for (i = 0; i < blob.len; i++) {
if (strchr(accept, blob.ptr[i]) == NULL) {
*l = APK_BLOB_PTR_LEN(blob.ptr, i);
*r = APK_BLOB_PTR_LEN(blob.ptr+i, blob.len-i);
return 1;
}
}
return 0;
}
int apk_blob_cspn(apk_blob_t blob, const char *reject, apk_blob_t *l, apk_blob_t *r)
{
int i;
for (i = 0; i < blob.len; i++) {
if (strchr(reject, blob.ptr[i]) != NULL) {
*l = APK_BLOB_PTR_LEN(blob.ptr, i);
*r = APK_BLOB_PTR_LEN(blob.ptr+i, blob.len-i);
return 1;
}
}
return 0;
}
int apk_blob_rsplit(apk_blob_t blob, char split, apk_blob_t *l, apk_blob_t *r)
{
char *sep;
sep = memrchr(blob.ptr, split, blob.len);
if (sep == NULL)
return 0;
if (l != NULL)
*l = APK_BLOB_PTR_PTR(blob.ptr, sep - 1);
if (r != NULL)
*r = APK_BLOB_PTR_PTR(sep + 1, blob.ptr + blob.len - 1);
return 1;
}
int apk_blob_split(apk_blob_t blob, apk_blob_t split, apk_blob_t *l, apk_blob_t *r)
{
char *pos = blob.ptr, *end = blob.ptr + blob.len - split.len + 1;
if (end < pos)
return 0;
while (1) {
pos = memchr(pos, split.ptr[0], end - pos);
if (pos == NULL)
return 0;
if (split.len > 1 && memcmp(pos, split.ptr, split.len) != 0) {
pos++;
continue;
}
*l = APK_BLOB_PTR_PTR(blob.ptr, pos-1);
*r = APK_BLOB_PTR_PTR(pos+split.len, blob.ptr+blob.len-1);
return 1;
}
}
unsigned long apk_blob_hash(apk_blob_t blob)
{
unsigned long hash = 5381;
int i;
for (i = 0; i < blob.len; i++)
hash = hash * 33 + blob.ptr[i];
return hash;
}
int apk_blob_compare(apk_blob_t a, apk_blob_t b)
{
if (a.len == b.len)
return memcmp(a.ptr, b.ptr, a.len);
if (a.len < b.len)
return -1;
return 1;
}
int apk_blob_for_each_segment(apk_blob_t blob, const char *split,
int (*cb)(void *ctx, apk_blob_t blob), void *ctx)
{
apk_blob_t l, r, s = APK_BLOB_STR(split);
int rc;
r = blob;
while (apk_blob_split(r, s, &l, &r)) {
rc = cb(ctx, l);
if (rc != 0)
return rc;
}
if (r.len > 0)
return cb(ctx, r);
return 0;
}
static inline int dx(int c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 0xa;
if (c >= 'A' && c <= 'F')
return c - 'A' + 0xa;
return -1;
}
unsigned int apk_blob_parse_uint(apk_blob_t *blob, int base)
{
unsigned int val;
int ch;
val = 0;
while (blob->len && blob->ptr[0] != 0) {
ch = dx(blob->ptr[0]);
if (ch < 0 || ch >= base)
break;
val *= base;
val += ch;
blob->ptr++;
blob->len--;
}
return val;
}
int apk_blob_parse_char(apk_blob_t *blob)
{
int r;
if (blob->len == 0 || blob->ptr == NULL)
return -1;
r = blob->ptr[0];
blob->ptr++;
blob->len--;
return r;
}
int apk_hexdump_parse(apk_blob_t to, apk_blob_t from)
{
int i;
if (to.len * 2 != from.len)
return -1;
for (i = 0; i < from.len / 2; i++)
to.ptr[i] = (dx(from.ptr[i*2]) << 4) + dx(from.ptr[i*2+1]);
return 0;
}
int apk_hexdump_format(int tolen, char *to, apk_blob_t from)
{
static const char *xd = "0123456789abcdef";
int i;
for (i = 0; i < from.len && i*2+2 < tolen; i++) {
to[i*2+0] = xd[(from.ptr[i] >> 4) & 0xf];
to[i*2+1] = xd[from.ptr[i] & 0xf];
}
to[i*2] = 0;
return i*2;
}
|
