diff options
Diffstat (limited to 'lib/decompress_bunzip2.c')
| -rw-r--r-- | lib/decompress_bunzip2.c | 53 |
1 files changed, 36 insertions, 17 deletions
diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c index 708e2a86d87..31c5f7675fb 100644 --- a/lib/decompress_bunzip2.c +++ b/lib/decompress_bunzip2.c @@ -1,4 +1,3 @@ -/* vi: set sw = 4 ts = 4: */ /* Small bzip2 deflate implementation, by Rob Landley (rob@landley.net). Based on bzip2 decompression code by Julian R Seward (jseward@acm.org), @@ -45,12 +44,13 @@ */ -#ifndef STATIC +#ifdef STATIC +#define PREBOOT +#else #include <linux/decompress/bunzip2.h> -#endif /* !STATIC */ +#endif /* STATIC */ #include <linux/decompress/mm.h> -#include <linux/slab.h> #ifndef INT_MAX #define INT_MAX 0x7fffffff @@ -105,6 +105,8 @@ struct bunzip_data { unsigned char selectors[32768]; /* nSelectors = 15 bits */ struct group_data groups[MAX_GROUPS]; /* Huffman coding tables */ int io_error; /* non-zero if we have IO error */ + int byteCount[256]; + unsigned char symToByte[256], mtfSymbol[256]; }; @@ -156,14 +158,16 @@ static int INIT get_next_block(struct bunzip_data *bd) int *base = NULL; int *limit = NULL; int dbufCount, nextSym, dbufSize, groupCount, selector, - i, j, k, t, runPos, symCount, symTotal, nSelectors, - byteCount[256]; - unsigned char uc, symToByte[256], mtfSymbol[256], *selectors; + i, j, k, t, runPos, symCount, symTotal, nSelectors, *byteCount; + unsigned char uc, *symToByte, *mtfSymbol, *selectors; unsigned int *dbuf, origPtr; dbuf = bd->dbuf; dbufSize = bd->dbufSize; selectors = bd->selectors; + byteCount = bd->byteCount; + symToByte = bd->symToByte; + mtfSymbol = bd->mtfSymbol; /* Read in header signature and CRC, then validate signature. (last block signature means CRC is for whole file, return now) */ @@ -297,7 +301,7 @@ static int INIT get_next_block(struct bunzip_data *bd) again when using them (during symbol decoding).*/ base = hufGroup->base-1; limit = hufGroup->limit-1; - /* Calculate permute[]. Concurently, initialize + /* Calculate permute[]. Concurrently, initialize * temp[] and limit[]. */ pp = 0; for (i = minLen; i <= maxLen; i++) { @@ -635,6 +639,8 @@ static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len, /* Allocate bunzip_data. Most fields initialize to zero. */ bd = *bdp = malloc(i); + if (!bd) + return RETVAL_OUT_OF_MEMORY; memset(bd, 0, sizeof(struct bunzip_data)); /* Setup input buffer */ bd->inbuf = inbuf; @@ -662,6 +668,8 @@ static int INIT start_bunzip(struct bunzip_data **bdp, void *inbuf, int len, bd->dbufSize = 100000*(i-BZh0); bd->dbuf = large_malloc(bd->dbufSize * sizeof(int)); + if (!bd->dbuf) + return RETVAL_OUT_OF_MEMORY; return RETVAL_OK; } @@ -672,28 +680,26 @@ STATIC int INIT bunzip2(unsigned char *buf, int len, int(*flush)(void*, unsigned int), unsigned char *outbuf, int *pos, - void(*error_fn)(char *x)) + void(*error)(char *x)) { struct bunzip_data *bd; int i = -1; unsigned char *inbuf; - set_error_fn(error_fn); if (flush) outbuf = malloc(BZIP2_IOBUF_SIZE); - else - len -= 4; /* Uncompressed size hack active in pre-boot - environment */ + if (!outbuf) { - error("Could not allocate output bufer"); - return -1; + error("Could not allocate output buffer"); + return RETVAL_OUT_OF_MEMORY; } if (buf) inbuf = buf; else inbuf = malloc(BZIP2_IOBUF_SIZE); if (!inbuf) { - error("Could not allocate input bufer"); + error("Could not allocate input buffer"); + i = RETVAL_OUT_OF_MEMORY; goto exit_0; } i = start_bunzip(&bd, inbuf, len, fill); @@ -720,11 +726,14 @@ STATIC int INIT bunzip2(unsigned char *buf, int len, } else if (i == RETVAL_UNEXPECTED_OUTPUT_EOF) { error("Compressed file ends unexpectedly"); } + if (!bd) + goto exit_1; if (bd->dbuf) large_free(bd->dbuf); if (pos) *pos = bd->inbufPos; free(bd); +exit_1: if (!buf) free(inbuf); exit_0: @@ -733,4 +742,14 @@ exit_0: return i; } -#define decompress bunzip2 +#ifdef PREBOOT +STATIC int INIT decompress(unsigned char *buf, int len, + int(*fill)(void*, unsigned int), + int(*flush)(void*, unsigned int), + unsigned char *outbuf, + int *pos, + void(*error)(char *x)) +{ + return bunzip2(buf, len - 4, fill, flush, outbuf, pos, error); +} +#endif |