diff options
Diffstat (limited to 'archival/libunarchive/decompress_bunzip2.c')
| -rw-r--r-- | archival/libunarchive/decompress_bunzip2.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/archival/libunarchive/decompress_bunzip2.c b/archival/libunarchive/decompress_bunzip2.c index 259a477..07e3cf0 100644 --- a/archival/libunarchive/decompress_bunzip2.c +++ b/archival/libunarchive/decompress_bunzip2.c @@ -134,8 +134,6 @@ static unsigned int get_bits(bunzip_data *bd, char bits_wanted) static int get_next_block(bunzip_data *bd) { - /* Note: Ignore the warning about hufGroup, base and limit being used uninitialized. - * They will be initialized on the fist pass of the loop. */ struct group_data *hufGroup; int dbufCount,nextSym,dbufSize,groupCount,*base,*limit,selector, i,j,k,t,runPos,symCount,symTotal,nSelectors,byteCount[256]; @@ -286,16 +284,15 @@ static int get_next_block(bunzip_data *bd) mtfSymbol[i]=(unsigned char)i; } /* Loop through compressed symbols. */ - runPos=dbufCount=symCount=selector=0; + runPos=dbufCount=selector=0; for(;;) { - /* Determine which Huffman coding group to use. */ - if(!(symCount--)) { - symCount=GROUP_SIZE-1; - if(selector>=nSelectors) return RETVAL_DATA_ERROR; - hufGroup=bd->groups+selectors[selector++]; - base=hufGroup->base-1; - limit=hufGroup->limit-1; - } + /* fetch next Huffman coding group from list. */ + symCount=GROUP_SIZE-1; + if(selector>=nSelectors) return RETVAL_DATA_ERROR; + hufGroup=bd->groups+selectors[selector++]; + base=hufGroup->base-1; + limit=hufGroup->limit-1; +continue_this_group: /* Read next Huffman-coded symbol. */ /* Note: It is far cheaper to read maxLen bits and back up than it is to read minLen bits and then an additional bit at a time, testing @@ -346,7 +343,7 @@ got_huff_bits: context). Thus space is saved. */ t += (runPos << nextSym); /* +runPos if RUNA; +2*runPos if RUNB */ runPos <<= 1; - continue; + goto end_of_huffman_loop; } /* When we hit the first non-run symbol after a run, we now know how many times to repeat the last literal, so append that many @@ -384,6 +381,10 @@ got_huff_bits: /* We have our literal byte. Save it into dbuf. */ byteCount[uc]++; dbuf[dbufCount++] = (unsigned int)uc; + /* Skip group initialization if we're not done with this group. Done this + * way to avoid compiler warning. */ +end_of_huffman_loop: + if(symCount--) goto continue_this_group; } /* At this point, we've read all the Huffman-coded symbols (and repeated runs) for this block from the input stream, and decoded them into the |