1 | /* |
1 | /* |
2 | * Copyright (c) 2000-2007 Marc Alexander Lehmann <schmorp@schmorp.de> |
2 | * Copyright (c) 2000-2008 Marc Alexander Lehmann <schmorp@schmorp.de> |
3 | * |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
5 | * tion, are permitted provided that the following conditions are met: |
5 | * tion, are permitted provided that the following conditions are met: |
6 | * |
6 | * |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
… | |
… | |
206 | while (len < maxlen && ref[len] == ip[len]); |
206 | while (len < maxlen && ref[len] == ip[len]); |
207 | |
207 | |
208 | break; |
208 | break; |
209 | } |
209 | } |
210 | |
210 | |
211 | len -= 2; |
211 | len -= 2; /* len is now #octets - 1 */ |
212 | ip++; |
212 | ip++; |
213 | |
213 | |
214 | if (len < 7) |
214 | if (len < 7) |
215 | { |
215 | { |
216 | *op++ = (off >> 8) + (len << 5); |
216 | *op++ = (off >> 8) + (len << 5); |
… | |
… | |
220 | *op++ = (off >> 8) + ( 7 << 5); |
220 | *op++ = (off >> 8) + ( 7 << 5); |
221 | *op++ = len - 7; |
221 | *op++ = len - 7; |
222 | } |
222 | } |
223 | |
223 | |
224 | *op++ = off; |
224 | *op++ = off; |
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225 | lit = 0; op++; /* start run */ |
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226 | |
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227 | ip += len + 1; |
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228 | |
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229 | if (expect_false (ip > in_end - 2)) |
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230 | break; |
225 | |
231 | |
226 | #if ULTRA_FAST || VERY_FAST |
232 | #if ULTRA_FAST || VERY_FAST |
227 | ip += len; |
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228 | #if VERY_FAST && !ULTRA_FAST |
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229 | --ip; |
233 | --ip; |
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234 | # if VERY_FAST && !ULTRA_FAST |
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235 | --ip; |
230 | #endif |
236 | # endif |
231 | hval = FRST (ip); |
237 | hval = FRST (ip); |
232 | |
238 | |
233 | hval = NEXT (hval, ip); |
239 | hval = NEXT (hval, ip); |
234 | htab[IDX (hval)] = ip; |
240 | htab[IDX (hval)] = ip; |
235 | ip++; |
241 | ip++; |
236 | |
242 | |
237 | #if VERY_FAST && !ULTRA_FAST |
243 | # if VERY_FAST && !ULTRA_FAST |
238 | hval = NEXT (hval, ip); |
244 | hval = NEXT (hval, ip); |
239 | htab[IDX (hval)] = ip; |
245 | htab[IDX (hval)] = ip; |
240 | ip++; |
246 | ip++; |
241 | #endif |
247 | # endif |
242 | #else |
248 | #else |
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249 | ip -= len + 1; |
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250 | |
243 | do |
251 | do |
244 | { |
252 | { |
245 | hval = NEXT (hval, ip); |
253 | hval = NEXT (hval, ip); |
246 | htab[IDX (hval)] = ip; |
254 | htab[IDX (hval)] = ip; |
247 | ip++; |
255 | ip++; |
248 | } |
256 | } |
249 | while (len--); |
257 | while (len--); |
250 | #endif |
258 | #endif |
251 | |
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252 | lit = 0; op++; /* start run */ |
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253 | } |
259 | } |
254 | else |
260 | else |
255 | { |
261 | { |
256 | /* one more literal byte we must copy */ |
262 | /* one more literal byte we must copy */ |
257 | if (expect_false (op >= out_end)) |
263 | if (expect_false (op >= out_end)) |