ref: 6cb359cc00bdc8204b011db46b8746c446f2c4de
dir: /sys/src/libflate/deflateblock.c/
#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; }