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1 | #include <stdlib.h> | |
2 | #include <config.h> | |
3 | ||
4 | #ifdef HAVE_LZO | |
5 | #include <minilzo.h> | |
6 | #endif /* HAVE_LZO */ | |
7 | ||
8 | #include "transformation.h" | |
9 | ||
10 | /* | |
11 | * Initialize | |
12 | */ | |
13 | static int | |
14 | lzo_initialize(Transformation *xform, int enc) | |
15 | { | |
16 | } | |
17 | ||
18 | /* | |
19 | * Shut down. | |
20 | */ | |
21 | static int | |
22 | lzo_shutdown(Transformation *xform) | |
23 | { | |
24 | return 0; | |
25 | } | |
26 | ||
27 | /* | |
28 | * Handle forks. | |
29 | */ | |
30 | static int | |
31 | lzo_startNewTape(Transformation *xform, struct tapebuf *tpbin, | |
32 | unsigned long *destlen) | |
33 | { | |
34 | return 0; | |
35 | } | |
36 | ||
37 | /* | |
38 | * Start slave process. | |
39 | */ | |
40 | static int | |
41 | lzo_startDiskIOProcess(Transformation *xform) | |
42 | { | |
43 | return 0; | |
44 | } | |
45 | ||
46 | /* | |
47 | * End slave process. | |
48 | */ | |
49 | static int | |
50 | lzo_endDiskIOProcess(Transformation *xform) | |
51 | { | |
52 | if (xform != NULL) { | |
53 | #ifdef HAVE_LZO | |
54 | if (xform->state.lzo.LZO_WorkMem != NULL) { | |
55 | free(xform->state.lzo.LZO_WorkMem); | |
56 | } | |
57 | #endif /* HAVE_LZO */ | |
58 | free(xform); | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | /* | |
65 | * Compress a buffer. | |
66 | */ | |
67 | static int | |
68 | lzo_compress(Transformation *xform, struct tapebuf *tpbin, | |
69 | unsigned long *destlen, const char *src, int srclen, int compressed) | |
70 | { | |
71 | #ifdef HAVE_LZO | |
72 | lzo_uint *worklen2 = (lzo_uint *) destlen; | |
73 | int compresult; | |
74 | ||
75 | compresult = lzo1x_1_compress(src, srclen, tpbin->buf, worklen2, | |
76 | xform->state.lzo.LZO_WorkMem); | |
77 | ||
78 | return compresult == LZO_E_OK ? 1 : 0; | |
79 | #else | |
80 | return 1; | |
81 | #endif /* HAVE_LZO */ | |
82 | } | |
83 | ||
84 | /* | |
85 | * Decompress a buffer. | |
86 | */ | |
87 | static int | |
88 | lzo_decompress(Transformation *xform, struct tapebuf *tpbin, | |
89 | unsigned long *destlen, const char *src, int srclen, char **reason) | |
90 | { | |
91 | #ifdef HAVE_LZO | |
92 | int cresult = 0; | |
93 | lzo_uint destlen2 = *destlen; | |
94 | cresult = lzo1x_decompress(src, srclen, tpbin->buf, &destlen2, NULL); | |
95 | *destlen = destlen2; | |
96 | switch (cresult) { | |
97 | case LZO_E_OK: | |
98 | *reason = ""; | |
99 | break; | |
100 | case LZO_E_ERROR: | |
101 | case LZO_E_EOF_NOT_FOUND: | |
102 | *reason = "data error"; | |
103 | break; | |
104 | default: | |
105 | *reason = "unknown"; | |
106 | } | |
107 | ||
108 | return (cresult == LZO_E_OK) ? 1 : 0; | |
109 | #else | |
110 | return 1; | |
111 | #endif /* HAVE_LZO */ | |
112 | } | |
113 | ||
114 | /* | |
115 | * Factory | |
116 | */ | |
117 | Transformation | |
118 | *transformation_lzo_factory(int enc) | |
119 | { | |
120 | Transformation *t = (Transformation *) malloc(sizeof (Transformation)); | |
121 | ||
122 | #ifdef HAVE_LZO | |
123 | t->state.lzo.LZO_WorkMem = malloc(LZO1X_1_MEM_COMPRESS); | |
124 | if (!t->state.lzo.LZO_WorkMem) | |
125 | quit("couldn't allocate a compress buffer.\n"); | |
126 | #else /* HAVE_LZO */ | |
127 | t->state = NULL; | |
128 | #endif /* HAVE_LZO */ | |
129 | ||
130 | t->name = "lzo"; | |
131 | t->mandatory = 0; | |
132 | t->initialize = &lzo_initialize; | |
133 | t->shutdown = &lzo_shutdown; | |
134 | t->startNewTape = &lzo_startNewTape; | |
135 | t->startDiskIOProcess = &lzo_startDiskIOProcess; | |
136 | t->endDiskIOProcess = &lzo_endDiskIOProcess; | |
137 | t->compress = &lzo_compress; | |
138 | t->decompress = &lzo_decompress; | |
139 | ||
140 | return t; | |
141 | } |