blob: b16c3f3b900c03f549144ab0cf7cb32d9b916325 [file] [log] [blame]
#include <u.h>
#include <libc.h>
#include <flate.h>
typedef struct Block Block;
struct Block
{
uchar *pos;
uchar *limit;
};
static int
blread(void *vb, void *buf, int n)
{
Block *b;
b = vb;
if(n > b->limit - b->pos)
n = b->limit - b->pos;
memmove(buf, b->pos, n);
b->pos += n;
return n;
}
static int
blwrite(void *vb, void *buf, int n)
{
Block *b;
b = vb;
if(n > b->limit - b->pos)
n = b->limit - b->pos;
memmove(b->pos, buf, n);
b->pos += n;
return n;
}
int
deflateblock(uchar *dst, int dsize, uchar *src, int ssize, int level, int debug)
{
Block bd, bs;
int ok;
bs.pos = src;
bs.limit = src + ssize;
bd.pos = dst;
bd.limit = dst + dsize;
ok = deflate(&bd, blwrite, &bs, blread, level, debug);
if(ok != FlateOk)
return ok;
return bd.pos - dst;
}