… | |
… | |
91 | # define INIT_HTAB 0 |
91 | # define INIT_HTAB 0 |
92 | #endif |
92 | #endif |
93 | |
93 | |
94 | /* |
94 | /* |
95 | * Avoid assigning values to errno variable? for some embedding purposes |
95 | * Avoid assigning values to errno variable? for some embedding purposes |
96 | * (linux kernel for example), this is neccessary. NOTE: this breaks |
96 | * (linux kernel for example), this is necessary. NOTE: this breaks |
97 | * the documentation in lzf.h. |
97 | * the documentation in lzf.h. Avoiding errno has no speed impact. |
98 | */ |
98 | */ |
99 | #ifndef AVOID_ERRNO |
99 | #ifndef AVOID_ERRNO |
100 | # define AVOID_ERRNO 0 |
100 | # define AVOID_ERRNO 0 |
101 | #endif |
101 | #endif |
102 | |
102 | |
103 | /* |
103 | /* |
104 | * Wether to pass the LZF_STATE variable as argument, or allocate it |
104 | * Whether to pass the LZF_STATE variable as argument, or allocate it |
105 | * on the stack. For small-stack environments, define this to 1. |
105 | * on the stack. For small-stack environments, define this to 1. |
106 | * NOTE: this breaks the prototype in lzf.h. |
106 | * NOTE: this breaks the prototype in lzf.h. |
107 | */ |
107 | */ |
108 | #ifndef LZF_STATE_ARG |
108 | #ifndef LZF_STATE_ARG |
109 | # define LZF_STATE_ARG 0 |
109 | # define LZF_STATE_ARG 0 |
110 | #endif |
110 | #endif |
111 | |
111 | |
112 | /* |
112 | /* |
113 | * Wether to add extra checks for input validity in lzf_decompress |
113 | * Whether to add extra checks for input validity in lzf_decompress |
114 | * and return EINVAL if the input stream has been corrupted. This |
114 | * and return EINVAL if the input stream has been corrupted. This |
115 | * only shields against overflowing the input buffer and will not |
115 | * only shields against overflowing the input buffer and will not |
116 | * detect most corrupted streams. |
116 | * detect most corrupted streams. |
117 | * This check is not normally noticable on modern hardware |
117 | * This check is not normally noticeable on modern hardware |
118 | * (<1% slowdown), but might slow down older cpus considerably. |
118 | * (<1% slowdown), but might slow down older cpus considerably. |
119 | */ |
119 | */ |
120 | #ifndef CHECK_INPUT |
120 | #ifndef CHECK_INPUT |
121 | # define CHECK_INPUT 1 |
121 | # define CHECK_INPUT 1 |
122 | #endif |
122 | #endif |
123 | |
123 | |
|
|
124 | /* |
|
|
125 | * Whether to store pointers or offsets inside the hash table. On |
|
|
126 | * 64 bit architetcures, pointers take up twice as much space, |
|
|
127 | * and might also be slower. Default is to autodetect. |
|
|
128 | */ |
|
|
129 | /*#define LZF_USER_OFFSETS autodetect */ |
|
|
130 | |
124 | /*****************************************************************************/ |
131 | /*****************************************************************************/ |
125 | /* nothing should be changed below */ |
132 | /* nothing should be changed below */ |
126 | |
133 | |
|
|
134 | #ifdef __cplusplus |
|
|
135 | # include <cstring> |
|
|
136 | # include <climits> |
|
|
137 | using namespace std; |
|
|
138 | #else |
|
|
139 | # include <string.h> |
|
|
140 | # include <limits.h> |
|
|
141 | #endif |
|
|
142 | |
|
|
143 | #ifndef LZF_USE_OFFSETS |
|
|
144 | # if defined (WIN32) |
|
|
145 | # define LZF_USE_OFFSETS defined(_M_X64) |
|
|
146 | # else |
|
|
147 | # if __cplusplus > 199711L |
|
|
148 | # include <cstdint> |
|
|
149 | # else |
|
|
150 | # include <stdint.h> |
|
|
151 | # endif |
|
|
152 | # define LZF_USE_OFFSETS (UINTPTR_MAX > 0xffffffffU) |
|
|
153 | # endif |
|
|
154 | #endif |
|
|
155 | |
127 | typedef unsigned char u8; |
156 | typedef unsigned char u8; |
128 | |
157 | |
|
|
158 | #if LZF_USE_OFFSETS |
|
|
159 | # define LZF_HSLOT_BIAS ((const u8 *)in_data) |
|
|
160 | typedef unsigned int LZF_HSLOT; |
|
|
161 | #else |
|
|
162 | # define LZF_HSLOT_BIAS 0 |
|
|
163 | typedef const u8 *LZF_HSLOT; |
|
|
164 | #endif |
|
|
165 | |
129 | typedef const u8 *LZF_STATE[1 << (HLOG)]; |
166 | typedef LZF_HSLOT LZF_STATE[1 << (HLOG)]; |
130 | |
167 | |
131 | #if !STRICT_ALIGN |
168 | #if !STRICT_ALIGN |
132 | /* for unaligned accesses we need a 16 bit datatype. */ |
169 | /* for unaligned accesses we need a 16 bit datatype. */ |
133 | # include <limits.h> |
|
|
134 | # if USHRT_MAX == 65535 |
170 | # if USHRT_MAX == 65535 |
135 | typedef unsigned short u16; |
171 | typedef unsigned short u16; |
136 | # elif UINT_MAX == 65535 |
172 | # elif UINT_MAX == 65535 |
137 | typedef unsigned int u16; |
173 | typedef unsigned int u16; |
138 | # else |
174 | # else |
… | |
… | |
140 | # define STRICT_ALIGN 1 |
176 | # define STRICT_ALIGN 1 |
141 | # endif |
177 | # endif |
142 | #endif |
178 | #endif |
143 | |
179 | |
144 | #if ULTRA_FAST |
180 | #if ULTRA_FAST |
145 | # if defined(VERY_FAST) |
|
|
146 | # undef VERY_FAST |
181 | # undef VERY_FAST |
147 | # endif |
|
|
148 | #endif |
|
|
149 | |
|
|
150 | #if INIT_HTAB |
|
|
151 | # ifdef __cplusplus |
|
|
152 | # include <cstring> |
|
|
153 | # else |
|
|
154 | # include <string.h> |
|
|
155 | # endif |
|
|
156 | #endif |
182 | #endif |
157 | |
183 | |
158 | #endif |
184 | #endif |
159 | |
185 | |