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@@ -1,503 +0,0 @@
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---- busybox-1.11.0/archival/libunarchive/decompress_bunzip2.c Wed Jun 25 14:51:26 2008
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-+++ busybox-1.11.0-bunzip2/archival/libunarchive/decompress_bunzip2.c Sat Jun 28 20:04:31 2008
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-@@ -66,7 +66,6 @@
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- * | grep 'bd->' | sed 's/^.*bd->/bd->/' | sort | $PAGER
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- * and moved it (inbufBitCount) to offset 0.
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- */
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--
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- struct bunzip_data {
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- /* I/O tracking data (file handles, buffers, positions, etc.) */
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- unsigned inbufBitCount, inbufBits;
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-@@ -102,11 +101,9 @@
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-
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- /* If we need to get more data from the byte buffer, do so. (Loop getting
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- one byte at a time to enforce endianness and avoid unaligned access.) */
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--
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- while ((int)(bd->inbufBitCount) < bits_wanted) {
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-
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- /* If we need to read more data from file into byte buffer, do so */
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--
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- if (bd->inbufPos == bd->inbufCount) {
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- /* if "no input fd" case: in_fd == -1, read fails, we jump */
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- bd->inbufCount = read(bd->in_fd, bd->inbuf, IOBUF_SIZE);
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-@@ -116,7 +113,6 @@
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- }
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-
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- /* Avoid 32-bit overflow (dump bit buffer to top of output) */
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--
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- if (bd->inbufBitCount >= 24) {
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- bits = bd->inbufBits & ((1 << bd->inbufBitCount) - 1);
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- bits_wanted -= bd->inbufBitCount;
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-@@ -125,13 +121,11 @@
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- }
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-
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- /* Grab next 8 bits of input from buffer. */
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--
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- bd->inbufBits = (bd->inbufBits << 8) | bd->inbuf[bd->inbufPos++];
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- bd->inbufBitCount += 8;
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- }
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-
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- /* Calculate result */
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--
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- bd->inbufBitCount -= bits_wanted;
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- bits |= (bd->inbufBits >> bd->inbufBitCount) & ((1 << bits_wanted) - 1);
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-
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-@@ -139,7 +133,6 @@
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- }
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-
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- /* Unpacks the next block and sets up for the inverse burrows-wheeler step. */
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--
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- static int get_next_block(bunzip_data *bd)
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- {
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- struct group_data *hufGroup;
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-@@ -153,13 +146,11 @@
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- selectors = bd->selectors;
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-
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- /* Reset longjmp I/O error handling */
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--
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- i = setjmp(bd->jmpbuf);
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- if (i) return i;
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-
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- /* Read in header signature and CRC, then validate signature.
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- (last block signature means CRC is for whole file, return now) */
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--
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- i = get_bits(bd, 24);
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- j = get_bits(bd, 24);
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- bd->headerCRC = get_bits(bd, 32);
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-@@ -169,7 +160,6 @@
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- /* We can add support for blockRandomised if anybody complains. There was
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- some code for this in busybox 1.0.0-pre3, but nobody ever noticed that
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- it didn't actually work. */
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--
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- if (get_bits(bd, 1)) return RETVAL_OBSOLETE_INPUT;
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- origPtr = get_bits(bd, 24);
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- if ((int)origPtr > dbufSize) return RETVAL_DATA_ERROR;
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-@@ -179,7 +169,6 @@
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- symbols to deal with, and writes a sparse bitfield indicating which
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- values were present. We make a translation table to convert the symbols
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- back to the corresponding bytes. */
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--
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- t = get_bits(bd, 16);
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- symTotal = 0;
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- for (i = 0; i < 16; i++) {
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-@@ -192,7 +181,6 @@
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- }
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-
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- /* How many different Huffman coding groups does this block use? */
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--
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- groupCount = get_bits(bd, 3);
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- if (groupCount < 2 || groupCount > MAX_GROUPS)
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- return RETVAL_DATA_ERROR;
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-@@ -201,19 +189,16 @@
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- group. Read in the group selector list, which is stored as MTF encoded
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- bit runs. (MTF=Move To Front, as each value is used it's moved to the
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- start of the list.) */
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--
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- nSelectors = get_bits(bd, 15);
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- if (!nSelectors) return RETVAL_DATA_ERROR;
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- for (i = 0; i < groupCount; i++) mtfSymbol[i] = i;
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- for (i = 0; i < nSelectors; i++) {
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-
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- /* Get next value */
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--
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- for (j = 0; get_bits(bd, 1); j++)
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- if (j >= groupCount) return RETVAL_DATA_ERROR;
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-
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- /* Decode MTF to get the next selector */
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--
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- uc = mtfSymbol[j];
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- for (;j;j--) mtfSymbol[j] = mtfSymbol[j-1];
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- mtfSymbol[0] = selectors[i] = uc;
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-@@ -221,10 +206,11 @@
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-
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- /* Read the Huffman coding tables for each group, which code for symTotal
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- literal symbols, plus two run symbols (RUNA, RUNB) */
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--
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- symCount = symTotal + 2;
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- for (j = 0; j < groupCount; j++) {
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-- unsigned char length[MAX_SYMBOLS], temp[MAX_HUFCODE_BITS+1];
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-+ unsigned char length[MAX_SYMBOLS];
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-+ /* 8 bits is ALMOST enough for temp[], see below */
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-+ unsigned temp[MAX_HUFCODE_BITS+1];
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- int minLen, maxLen, pp;
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-
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- /* Read Huffman code lengths for each symbol. They're stored in
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-@@ -233,7 +219,6 @@
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- (Subtracting 1 before the loop and then adding it back at the end is
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- an optimization that makes the test inside the loop simpler: symbol
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- length 0 becomes negative, so an unsigned inequality catches it.) */
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--
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- t = get_bits(bd, 5) - 1;
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- for (i = 0; i < symCount; i++) {
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- for (;;) {
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-@@ -243,7 +228,6 @@
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- /* If first bit is 0, stop. Else second bit indicates whether
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- to increment or decrement the value. Optimization: grab 2
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- bits and unget the second if the first was 0. */
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--
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- k = get_bits(bd, 2);
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- if (k < 2) {
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- bd->inbufBitCount++;
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-@@ -251,17 +235,14 @@
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- }
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-
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- /* Add one if second bit 1, else subtract 1. Avoids if/else */
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--
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- t += (((k+1) & 2) - 1);
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- }
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-
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- /* Correct for the initial -1, to get the final symbol length */
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--
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- length[i] = t + 1;
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- }
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-
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- /* Find largest and smallest lengths in this group */
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--
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- minLen = maxLen = length[0];
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- for (i = 1; i < symCount; i++) {
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- if (length[i] > maxLen) maxLen = length[i];
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-@@ -278,7 +259,6 @@
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- * number of bits can have. This is how the Huffman codes can vary in
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- * length: each code with a value>limit[length] needs another bit.
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- */
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--
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- hufGroup = bd->groups + j;
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- hufGroup->minLen = minLen;
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- hufGroup->maxLen = maxLen;
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-@@ -286,12 +266,10 @@
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- /* Note that minLen can't be smaller than 1, so we adjust the base
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- and limit array pointers so we're not always wasting the first
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- entry. We do this again when using them (during symbol decoding).*/
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--
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- base = hufGroup->base - 1;
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- limit = hufGroup->limit - 1;
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-
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- /* Calculate permute[]. Concurently, initialize temp[] and limit[]. */
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--
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- pp = 0;
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- for (i = minLen; i <= maxLen; i++) {
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- temp[i] = limit[i] = 0;
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-@@ -301,14 +279,14 @@
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- }
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-
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- /* Count symbols coded for at each bit length */
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--
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-+ /* NB: in pathological cases, temp[8] can end ip being 256.
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-+ * That's why uint8_t is too small for temp[]. */
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- for (i = 0; i < symCount; i++) temp[length[i]]++;
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-
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- /* Calculate limit[] (the largest symbol-coding value at each bit
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- * length, which is (previous limit<<1)+symbols at this level), and
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- * base[] (number of symbols to ignore at each bit length, which is
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- * limit minus the cumulative count of symbols coded for already). */
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--
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- pp = t = 0;
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- for (i = minLen; i < maxLen; i++) {
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- pp += temp[i];
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-@@ -319,7 +297,6 @@
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- each level we're really only interested in the first few bits,
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- so here we set all the trailing to-be-ignored bits to 1 so they
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- don't affect the value>limit[length] comparison. */
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--
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- limit[i] = (pp << (maxLen - i)) - 1;
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- pp <<= 1;
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- t += temp[i];
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-@@ -335,7 +312,6 @@
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- and run length encoding, saving the result into dbuf[dbufCount++] = uc */
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-
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- /* Initialize symbol occurrence counters and symbol Move To Front table */
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--
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- memset(byteCount, 0, sizeof(byteCount)); /* smaller, maybe slower? */
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- for (i = 0; i < 256; i++) {
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- //byteCount[i] = 0;
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-@@ -347,8 +323,7 @@
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- runPos = dbufCount = selector = 0;
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- for (;;) {
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-
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-- /* fetch next Huffman coding group from list. */
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--
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-+ /* Fetch next Huffman coding group from list. */
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- symCount = GROUP_SIZE - 1;
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- if (selector >= nSelectors) return RETVAL_DATA_ERROR;
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- hufGroup = bd->groups + selectors[selector++];
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-@@ -367,7 +342,6 @@
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- dry). The following (up to got_huff_bits:) is equivalent to
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- j = get_bits(bd, hufGroup->maxLen);
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- */
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--
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- while ((int)(bd->inbufBitCount) < hufGroup->maxLen) {
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- if (bd->inbufPos == bd->inbufCount) {
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- j = get_bits(bd, hufGroup->maxLen);
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-@@ -382,13 +356,11 @@
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- got_huff_bits:
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-
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- /* Figure how how many bits are in next symbol and unget extras */
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--
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- i = hufGroup->minLen;
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- while (j > limit[i]) ++i;
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- bd->inbufBitCount += (hufGroup->maxLen - i);
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-
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- /* Huffman decode value to get nextSym (with bounds checking) */
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--
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- if (i > hufGroup->maxLen)
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- return RETVAL_DATA_ERROR;
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- j = (j >> (hufGroup->maxLen - i)) - base[i];
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-@@ -400,11 +372,9 @@
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- byte, or a repeated run of the most recent literal byte. First,
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- check if nextSym indicates a repeated run, and if so loop collecting
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- how many times to repeat the last literal. */
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--
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- if ((unsigned)nextSym <= SYMBOL_RUNB) { /* RUNA or RUNB */
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-
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- /* If this is the start of a new run, zero out counter */
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--
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- if (!runPos) {
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- runPos = 1;
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- t = 0;
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-@@ -417,7 +387,6 @@
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- the basic or 0/1 method (except all bits 0, which would use no
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- symbols, but a run of length 0 doesn't mean anything in this
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- context). Thus space is saved. */
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--
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- t += (runPos << nextSym); /* +runPos if RUNA; +2*runPos if RUNB */
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- if (runPos < dbufSize) runPos <<= 1;
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- goto end_of_huffman_loop;
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-@@ -427,7 +396,6 @@
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- how many times to repeat the last literal, so append that many
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- copies to our buffer of decoded symbols (dbuf) now. (The last
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- literal used is the one at the head of the mtfSymbol array.) */
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--
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- if (runPos) {
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- runPos = 0;
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- if (dbufCount + t >= dbufSize) return RETVAL_DATA_ERROR;
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-@@ -438,7 +406,6 @@
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- }
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-
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- /* Is this the terminating symbol? */
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--
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- if (nextSym > symTotal) break;
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-
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- /* At this point, nextSym indicates a new literal character. Subtract
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-@@ -448,7 +415,6 @@
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- first symbol in the mtf array, position 0, would have been handled
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- as part of a run above. Therefore 1 unused mtf position minus
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- 2 non-literal nextSym values equals -1.) */
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--
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- if (dbufCount >= dbufSize) return RETVAL_DATA_ERROR;
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- i = nextSym - 1;
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- uc = mtfSymbol[i];
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-@@ -457,7 +423,6 @@
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- * small number of symbols, and are bound by 256 in any case, using
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- * memmove here would typically be bigger and slower due to function
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- * call overhead and other assorted setup costs. */
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--
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- do {
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- mtfSymbol[i] = mtfSymbol[i-1];
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- } while (--i);
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-@@ -465,13 +430,11 @@
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- uc = symToByte[uc];
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-
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- /* We have our literal byte. Save it into dbuf. */
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--
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- byteCount[uc]++;
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- dbuf[dbufCount++] = (unsigned)uc;
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-
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- /* Skip group initialization if we're not done with this group. Done
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- * this way to avoid compiler warning. */
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--
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- end_of_huffman_loop:
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- if (symCount--) goto continue_this_group;
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- }
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-@@ -484,7 +447,6 @@
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- */
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-
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- /* Turn byteCount into cumulative occurrence counts of 0 to n-1. */
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--
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- j = 0;
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- for (i = 0; i < 256; i++) {
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- k = j + byteCount[i];
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-@@ -493,7 +455,6 @@
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- }
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-
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- /* Figure out what order dbuf would be in if we sorted it. */
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--
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- for (i = 0; i < dbufCount; i++) {
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- uc = (unsigned char)(dbuf[i] & 0xff);
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- dbuf[byteCount[uc]] |= (i << 8);
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-@@ -503,11 +464,10 @@
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- /* Decode first byte by hand to initialize "previous" byte. Note that it
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- doesn't get output, and if the first three characters are identical
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- it doesn't qualify as a run (hence writeRunCountdown=5). */
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--
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- if (dbufCount) {
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- if ((int)origPtr >= dbufCount) return RETVAL_DATA_ERROR;
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- bd->writePos = dbuf[origPtr];
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|
|
-- bd->writeCurrent = (unsigned char)(bd->writePos & 0xff);
|
|
|
|
-+ bd->writeCurrent = (unsigned char)(bd->writePos & 0xff);
|
|
|
|
- bd->writePos >>= 8;
|
|
|
|
- bd->writeRunCountdown = 5;
|
|
|
|
- }
|
|
|
|
-@@ -522,7 +482,6 @@
|
|
|
|
- error (all errors are negative numbers). If out_fd!=-1, outbuf and len
|
|
|
|
- are ignored, data is written to out_fd and return is RETVAL_OK or error.
|
|
|
|
- */
|
|
|
|
--
|
|
|
|
- int read_bunzip(bunzip_data *bd, char *outbuf, int len)
|
|
|
|
- {
|
|
|
|
- const unsigned *dbuf;
|
|
|
|
-@@ -539,19 +498,15 @@
|
|
|
|
- /* We will always have pending decoded data to write into the output
|
|
|
|
- buffer unless this is the very first call (in which case we haven't
|
|
|
|
- Huffman-decoded a block into the intermediate buffer yet). */
|
|
|
|
--
|
|
|
|
- if (bd->writeCopies) {
|
|
|
|
-
|
|
|
|
- /* Inside the loop, writeCopies means extra copies (beyond 1) */
|
|
|
|
--
|
|
|
|
- --bd->writeCopies;
|
|
|
|
-
|
|
|
|
- /* Loop outputting bytes */
|
|
|
|
--
|
|
|
|
- for (;;) {
|
|
|
|
-
|
|
|
|
- /* If the output buffer is full, snapshot state and return */
|
|
|
|
--
|
|
|
|
- if (gotcount >= len) {
|
|
|
|
- bd->writePos = pos;
|
|
|
|
- bd->writeCurrent = current;
|
|
|
|
-@@ -560,13 +515,11 @@
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /* Write next byte into output buffer, updating CRC */
|
|
|
|
--
|
|
|
|
- outbuf[gotcount++] = current;
|
|
|
|
- bd->writeCRC = (bd->writeCRC << 8)
|
|
|
|
-- ^ bd->crc32Table[(bd->writeCRC >> 24) ^ current];
|
|
|
|
-+ ^ bd->crc32Table[(bd->writeCRC >> 24) ^ current];
|
|
|
|
-
|
|
|
|
- /* Loop now if we're outputting multiple copies of this byte */
|
|
|
|
--
|
|
|
|
- if (bd->writeCopies) {
|
|
|
|
- --bd->writeCopies;
|
|
|
|
- continue;
|
|
|
|
-@@ -582,35 +535,29 @@
|
|
|
|
- /* After 3 consecutive copies of the same byte, the 4th
|
|
|
|
- * is a repeat count. We count down from 4 instead
|
|
|
|
- * of counting up because testing for non-zero is faster */
|
|
|
|
--
|
|
|
|
- if (--bd->writeRunCountdown) {
|
|
|
|
- if (current != previous)
|
|
|
|
- bd->writeRunCountdown = 4;
|
|
|
|
- } else {
|
|
|
|
-
|
|
|
|
- /* We have a repeated run, this byte indicates the count */
|
|
|
|
--
|
|
|
|
- bd->writeCopies = current;
|
|
|
|
- current = previous;
|
|
|
|
- bd->writeRunCountdown = 5;
|
|
|
|
-
|
|
|
|
- /* Sometimes there are just 3 bytes (run length 0) */
|
|
|
|
--
|
|
|
|
- if (!bd->writeCopies) goto decode_next_byte;
|
|
|
|
-
|
|
|
|
- /* Subtract the 1 copy we'd output anyway to get extras */
|
|
|
|
--
|
|
|
|
- --bd->writeCopies;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
- /* Decompression of this block completed successfully */
|
|
|
|
--
|
|
|
|
- bd->writeCRC = ~bd->writeCRC;
|
|
|
|
- bd->totalCRC = ((bd->totalCRC << 1) | (bd->totalCRC >> 31)) ^ bd->writeCRC;
|
|
|
|
-
|
|
|
|
- /* If this block had a CRC error, force file level CRC error. */
|
|
|
|
--
|
|
|
|
- if (bd->writeCRC != bd->headerCRC) {
|
|
|
|
- bd->totalCRC = bd->headerCRC + 1;
|
|
|
|
- return RETVAL_LAST_BLOCK;
|
|
|
|
-@@ -619,7 +566,6 @@
|
|
|
|
-
|
|
|
|
- /* Refill the intermediate buffer by Huffman-decoding next block of input */
|
|
|
|
- /* (previous is just a convenient unused temp variable here) */
|
|
|
|
--
|
|
|
|
- previous = get_next_block(bd);
|
|
|
|
- if (previous) {
|
|
|
|
- bd->writeCount = previous;
|
|
|
|
-@@ -631,7 +577,6 @@
|
|
|
|
- goto decode_next_byte;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
--
|
|
|
|
- /* Allocate the structure, read file header. If in_fd==-1, inbuf must contain
|
|
|
|
- a complete bunzip file (len bytes long). If in_fd!=-1, inbuf and len are
|
|
|
|
- ignored, and data is read from file handle into temporary buffer. */
|
|
|
|
-@@ -639,7 +584,6 @@
|
|
|
|
- /* Because bunzip2 is used for help text unpacking, and because bb_show_usage()
|
|
|
|
- should work for NOFORK applets too, we must be extremely careful to not leak
|
|
|
|
- any allocations! */
|
|
|
|
--
|
|
|
|
- int start_bunzip(bunzip_data **bdp, int in_fd, const unsigned char *inbuf,
|
|
|
|
- int len)
|
|
|
|
- {
|
|
|
|
-@@ -650,16 +594,13 @@
|
|
|
|
- };
|
|
|
|
-
|
|
|
|
- /* Figure out how much data to allocate */
|
|
|
|
--
|
|
|
|
- i = sizeof(bunzip_data);
|
|
|
|
- if (in_fd != -1) i += IOBUF_SIZE;
|
|
|
|
-
|
|
|
|
- /* Allocate bunzip_data. Most fields initialize to zero. */
|
|
|
|
--
|
|
|
|
- bd = *bdp = xzalloc(i);
|
|
|
|
-
|
|
|
|
- /* Setup input buffer */
|
|
|
|
--
|
|
|
|
- bd->in_fd = in_fd;
|
|
|
|
- if (-1 == in_fd) {
|
|
|
|
- /* in this case, bd->inbuf is read-only */
|
|
|
|
-@@ -669,22 +610,18 @@
|
|
|
|
- bd->inbuf = (unsigned char *)(bd + 1);
|
|
|
|
-
|
|
|
|
- /* Init the CRC32 table (big endian) */
|
|
|
|
--
|
|
|
|
- crc32_filltable(bd->crc32Table, 1);
|
|
|
|
-
|
|
|
|
- /* Setup for I/O error handling via longjmp */
|
|
|
|
--
|
|
|
|
- i = setjmp(bd->jmpbuf);
|
|
|
|
- if (i) return i;
|
|
|
|
-
|
|
|
|
- /* Ensure that file starts with "BZh['1'-'9']." */
|
|
|
|
--
|
|
|
|
- i = get_bits(bd, 32);
|
|
|
|
- if ((unsigned)(i - BZh0 - 1) >= 9) return RETVAL_NOT_BZIP_DATA;
|
|
|
|
-
|
|
|
|
-- /* Fourth byte (ascii '1'-'9'), indicates block size in units of 100k of
|
|
|
|
-+ /* Fourth byte (ascii '1'-'9') indicates block size in units of 100k of
|
|
|
|
- uncompressed data. Allocate intermediate buffer for block. */
|
|
|
|
--
|
|
|
|
- bd->dbufSize = 100000 * (i - BZh0);
|
|
|
|
-
|
|
|
|
- /* Cannot use xmalloc - may leak bd in NOFORK case! */
|
|
|
|
-@@ -704,7 +641,6 @@
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- /* Decompress src_fd to dst_fd. Stops at end of bzip data, not end of file. */
|
|
|
|
--
|
|
|
|
- USE_DESKTOP(long long) int
|
|
|
|
- unpack_bz2_stream(int src_fd, int dst_fd)
|
|
|
|
- {
|
|
|
|
-@@ -761,9 +697,9 @@
|
|
|
|
- char c;
|
|
|
|
-
|
|
|
|
- if (i < 0)
|
|
|
|
-- fprintf(stderr,"%s\n", bunzip_errors[-i]);
|
|
|
|
-+ fprintf(stderr, "%s\n", bunzip_errors[-i]);
|
|
|
|
- else if (read(STDIN_FILENO, &c, 1))
|
|
|
|
-- fprintf(stderr,"Trailing garbage ignored\n");
|
|
|
|
-+ fprintf(stderr, "Trailing garbage ignored\n");
|
|
|
|
- return -i;
|
|
|
|
- }
|
|
|
|
- #endif
|
|
|