| … | |
… | |
| 70 | |
70 | |
| 71 | #define MAX_LIT (1 << 5) |
71 | #define MAX_LIT (1 << 5) |
| 72 | #define MAX_OFF (1 << 13) |
72 | #define MAX_OFF (1 << 13) |
| 73 | #define MAX_REF ((1 << 8) + (1 << 3)) |
73 | #define MAX_REF ((1 << 8) + (1 << 3)) |
| 74 | |
74 | |
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75 | #if (__i386 || __amd64) && __GNUC__ >= 3 |
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76 | # define lzf_movsb(dst, src, len) \ |
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77 | asm ("rep movsb" \ |
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78 | : "=D" (dst), "=S" (src), "=c" (len) \ |
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79 | : "0" (dst), "1" (src), "2" (len)); |
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80 | #endif |
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81 | |
| 75 | /* |
82 | /* |
| 76 | * compressed format |
83 | * compressed format |
| 77 | * |
84 | * |
| 78 | * 000LLLLL <L+1> ; literal |
85 | * 000LLLLL <L+1> ; literal |
| 79 | * LLLooooo oooooooo ; backref L |
86 | * LLLooooo oooooooo ; backref L |
| … | |
… | |
| 102 | unsigned int hval = FRST (ip); |
109 | unsigned int hval = FRST (ip); |
| 103 | unsigned long off; |
110 | unsigned long off; |
| 104 | int lit = 0; |
111 | int lit = 0; |
| 105 | |
112 | |
| 106 | #if INIT_HTAB |
113 | #if INIT_HTAB |
| 107 | # if USE_MEMCPY |
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| 108 | memset (htab, 0, sizeof (htab)); |
114 | memset (htab, 0, sizeof (htab)); |
| 109 | # else |
115 | # if 0 |
| 110 | for (hslot = htab; hslot < htab + HSIZE; hslot++) |
116 | for (hslot = htab; hslot < htab + HSIZE; hslot++) |
| 111 | *hslot++ = ip; |
117 | *hslot++ = ip; |
| 112 | # endif |
118 | # endif |
| 113 | #endif |
119 | #endif |
| 114 | |
120 | |
| 115 | for (;;) |
121 | for (;;) |
| 116 | { |
122 | { |
| … | |
… | |
| 212 | { |
218 | { |
| 213 | if (op + 1 + MAX_LIT >= out_end) |
219 | if (op + 1 + MAX_LIT >= out_end) |
| 214 | return 0; |
220 | return 0; |
| 215 | |
221 | |
| 216 | *op++ = MAX_LIT - 1; |
222 | *op++ = MAX_LIT - 1; |
| 217 | #if USE_MEMCPY |
223 | |
| 218 | memcpy (op, ip - MAX_LIT, MAX_LIT); |
224 | #ifdef lzf_movsb |
| 219 | op += MAX_LIT; |
225 | ip -= lit; |
| 220 | lit = 0; |
226 | lzf_movsb (op, ip, lit); |
| 221 | #else |
227 | #else |
| 222 | lit = -lit; |
228 | lit = -lit; |
| 223 | do |
229 | do |
| 224 | *op++ = ip[lit]; |
230 | *op++ = ip[lit]; |
| 225 | while (++lit); |
231 | while (++lit); |
| … | |
… | |
| 231 | { |
237 | { |
| 232 | if (op + lit + 1 >= out_end) |
238 | if (op + lit + 1 >= out_end) |
| 233 | return 0; |
239 | return 0; |
| 234 | |
240 | |
| 235 | *op++ = lit - 1; |
241 | *op++ = lit - 1; |
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242 | #ifdef lzf_movsb |
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243 | ip -= lit; |
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244 | lzf_movsb (op, ip, lit); |
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245 | #else |
| 236 | lit = -lit; |
246 | lit = -lit; |
| 237 | do |
247 | do |
| 238 | *op++ = ip[lit]; |
248 | *op++ = ip[lit]; |
| 239 | while (++lit); |
249 | while (++lit); |
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250 | #endif |
| 240 | } |
251 | } |
| 241 | |
252 | |
| 242 | return op - (u8 *) out_data; |
253 | return op - (u8 *) out_data; |
| 243 | } |
254 | } |
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255 | |
