55 lines
694 B
C
55 lines
694 B
C
#include <u.h>
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#include <lib9.h>
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#include <flate.h>
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typedef struct Block Block;
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struct Block
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{
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uint8_t *pos;
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uint8_t *limit;
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};
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static int
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blgetc(void *vb)
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{
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Block *b;
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b = vb;
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if(b->pos >= b->limit)
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return -1;
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return *b->pos++;
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}
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static int
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blwrite(void *vb, void *buf, int n)
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{
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Block *b;
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b = vb;
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if(n > b->limit - b->pos)
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n = b->limit - b->pos;
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memmove(b->pos, buf, n);
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b->pos += n;
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return n;
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}
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int
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inflateblock(uint8_t *dst, int dsize, uint8_t *src, int ssize)
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{
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Block bd, bs;
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int ok;
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bs.pos = src;
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bs.limit = src + ssize;
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bd.pos = dst;
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bd.limit = dst + dsize;
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ok = inflate(&bd, blwrite, &bs, blgetc);
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if(ok != FlateOk)
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return ok;
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return bd.pos - dst;
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}
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