_X_HIDDEN BufFilePtr
BufFilePushBZIP2 (BufFilePtr f)
{
xzip_buf *x;
x = malloc (sizeof (xzip_buf));
if (!x) return NULL;
bzero(&(x->z), sizeof(bz_stream));
x->f = f;
x->zstat = BZ2_bzDecompressInit(&(x->z),
0, /* verbosity: 0 silent, 4 max */
0); /* 0: go faster, 1: use less memory */
if (x->zstat != BZ_OK) {
free(x);
return NULL;
}
/* now that the history buffer is allocated, we provide the data buffer */
x->z.next_out = (char *) x->b;
x->z.avail_out = BUFFILESIZE;
x->z.next_in = (char *) x->b_in;
x->z.avail_in = 0;
return BufFileCreate((char *)x,
BufBzip2FileFill,
NULL,
BufBzip2FileSkip,
BufBzip2FileClose);
}
BufFilePtr
BufFilePushZIP (BufFilePtr f)
{
xzip_buf *x;
x = malloc (sizeof (xzip_buf));
if (!x) return 0;
/* these are just for raw calloc/free */
x->z.zalloc = Z_NULL;
x->z.zfree = Z_NULL;
x->z.opaque = Z_NULL;
x->f = f;
/* force inflateInit to allocate it's own history buffer */
x->z.next_in = Z_NULL;
x->z.next_out = Z_NULL;
x->z.avail_in = x->z.avail_out = 0;
/* using negative windowBits sets "nowrap" mode, which turns off
zlib header checking [undocumented, for gzip compatibility only?] */
x->zstat = inflateInit2(&(x->z), -MAX_WBITS);
if (x->zstat != Z_OK) {
free(x);
return 0;
}
/* now that the history buffer is allocated, we provide the data buffer */
x->z.next_out = x->b;
x->z.avail_out = BUFFILESIZE;
x->z.next_out = x->b_in;
x->z.avail_in = 0;
if (BufCheckZipHeader(x->f)) {
free(x);
return 0;
}
return BufFileCreate((char *)x,
BufZipFileFill,
0,
BufZipFileSkip,
BufZipFileClose);
}
