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
|
/* $MirOS: contrib/hosted/fwcf/minilzop.c,v 1.2 2007/03/09 22:25:45 tg Exp $ */
/*-
* Copyright (c) 2007
* Thorsten Glaser <tg@mirbsd.de>
*
* Provided that these terms and disclaimer and all copyright notices
* are retained or reproduced in an accompanying document, permission
* is granted to deal in this work without restriction, including un-
* limited rights to use, publicly perform, distribute, sell, modify,
* merge, give away, or sublicence.
*
* This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
* the utmost extent permitted by applicable law, neither express nor
* implied; without malicious intent or gross negligence. In no event
* may a licensor, author or contributor be held liable for indirect,
* direct, other damage, loss, or other issues arising in any way out
* of dealing in the work, even if advised of the possibility of such
* damage or existence of a defect, except proven that it results out
* of said person's immediate fault when using the work as intended.
*/
#include <sys/param.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "defs.h"
#include "adler.h"
#include "compress.h"
#include "minilzop.h"
__RCSID("$MirOS: contrib/hosted/fwcf/minilzop.c,v 1.2 2007/03/09 22:25:45 tg Exp $");
#define lodsw(s) __extension__({ \
const uint8_t *lodsw_buf = (const uint8_t *)(s);\
uint16_t lodsw_val; \
\
lodsw_val = lodsw_buf[0]; \
lodsw_val |= lodsw_buf[1] << 8; \
(lodsw_val); \
})
#define lodsd(s) __extension__({ \
const uint8_t *lodsd_buf = (const uint8_t *)(s);\
uint32_t lodsd_val; \
\
lodsd_val = lodsd_buf[0]; \
lodsd_val |= lodsd_buf[1] << 8; \
lodsd_val |= lodsd_buf[2] << 16; \
lodsd_val |= lodsd_buf[3] << 24; \
(lodsd_val); \
})
#define stosw(s,w) do { \
uint8_t *stosw_buf = (uint8_t *)(s); \
uint16_t stosw_val = (w); \
\
stosw_buf[0] = stosw_val & 0xFF; \
stosw_buf[1] = (stosw_val >> 8) & 0xFF; \
} while (0)
#define stosd(s,dw) do { \
uint8_t *stosd_buf = (uint8_t *)(s); \
uint32_t stosd_val = (dw); \
\
stosd_buf[0] = stosd_val & 0xFF; \
stosd_buf[1] = (stosd_val >> 8) & 0xFF; \
stosd_buf[2] = (stosd_val >> 16) & 0xFF; \
stosd_buf[3] = (stosd_val >> 24) & 0xFF; \
} while (0)
void
read_aszdata(int dfd, char **dbuf, size_t *dlen)
{
size_t len;
uint8_t hdrbuf[8];
ADLER_DECL;
if (read(dfd, hdrbuf, 8) != 8)
err(1, "short read");
*dlen = lodsd(hdrbuf + 4);
if ((*dbuf = malloc(*dlen)) == NULL)
err(255, "out of memory trying to allocate %zu bytes", *dlen);
if ((size_t)read(dfd, *dbuf, *dlen) != *dlen)
err(1, "short read");
len = 4;
ADLER_CALC(hdrbuf + 4);
len = *dlen;
ADLER_CALC(*dbuf);
if ((lodsw(hdrbuf) != s1) || (lodsw(hdrbuf + 2) != s2))
err(2, "checksum mismatch, size %zu,"
" want 0x%02X%02X%02X%02X got 0x%04X%04X", *dlen,
hdrbuf[3], hdrbuf[2], hdrbuf[1], hdrbuf[0], s2, s1);
}
void
write_aszdata(int dfd, const char *dbuf, size_t dlen)
{
size_t len;
uint8_t hdrbuf[8];
ADLER_DECL;
stosd(hdrbuf + 4, dlen);
len = 4;
ADLER_CALC(hdrbuf + 4);
len = dlen;
ADLER_CALC(dbuf);
stosw(hdrbuf, s1);
stosw(hdrbuf + 2, s2);
if (write(dfd, hdrbuf, 8) != 8)
err(1, "short write");
if ((size_t)write(dfd, dbuf, dlen) != dlen)
err(1, "short write");
}
int
minilzop(int ifd, int ofd, int compr_alg, int decompress)
{
size_t ilen, olen, n;
char *idata, *odata;
#ifndef SMALL
fprintf(stderr, "minilzop: using algorithm %02X (%s)\n",
compr_alg, compressor_get(compr_alg)->name);
#endif
if (decompress) {
read_aszdata(ifd, &idata, &ilen);
olen = lodsd(idata);
if ((odata = malloc(olen)) == NULL)
err(255, "out of memory trying to allocate %zu bytes",
olen);
if ((n = compressor_get(compr_alg)->decompress(odata, olen,
idata + 4, ilen - 4)) != olen)
errx(1, "size mismatch: decompressed %zu, want %zu",
n, olen);
free(idata);
idata = odata; /* save for later free(3) */
while (olen) {
if ((n = write(ofd, odata, olen)) == (size_t)-1)
err(1, "cannot write");
olen -= n;
odata += n;
}
free(idata);
} else {
size_t cc;
n = 16384;
idata = NULL;
ilen = 0;
slurp_file:
if ((idata = realloc(idata, (n <<= 1))) == NULL)
err(255, "out of memory trying to allocate %zu bytes",
n);
slurp_retry:
if ((cc = read(ifd, idata + ilen, n - ilen)) == (size_t)-1)
err(1, "cannot read");
ilen += cc;
if (cc > 0) {
if (ilen < n)
goto slurp_retry;
goto slurp_file;
}
if ((olen = compressor_get(compr_alg)->compress(&odata, idata,
ilen)) == (size_t)-1)
errx(1, "%s compression failed",
compressor_get(compr_alg)->name);
free(idata);
if ((idata = malloc(olen + 4)) == NULL)
err(255, "out of memory trying to allocate %zu bytes",
olen + 4);
stosd(idata, ilen);
memcpy(idata + 4, odata, olen);
write_aszdata(ofd, idata, olen + 4);
free(idata);
}
return (0);
}
|
