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author | rsc <devnull@localhost> | 2003-11-23 18:19:18 +0000 |
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committer | rsc <devnull@localhost> | 2003-11-23 18:19:18 +0000 |
commit | b6afd33e2f23953f00c6fac6b5d45946a9113654 (patch) | |
tree | 300478ec8ac939d1b7aa0c1b987367a49a4e47ce /src/libflate/inflateblock.c | |
parent | 8a708fb239f4272ac7e4f16f437093c56b2cab39 (diff) | |
download | plan9port-b6afd33e2f23953f00c6fac6b5d45946a9113654.tar.gz plan9port-b6afd33e2f23953f00c6fac6b5d45946a9113654.tar.bz2 plan9port-b6afd33e2f23953f00c6fac6b5d45946a9113654.zip |
add libflate
Diffstat (limited to 'src/libflate/inflateblock.c')
-rw-r--r-- | src/libflate/inflateblock.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/libflate/inflateblock.c b/src/libflate/inflateblock.c new file mode 100644 index 00000000..77077b62 --- /dev/null +++ b/src/libflate/inflateblock.c @@ -0,0 +1,54 @@ +#include <u.h> +#include <libc.h> +#include <flate.h> + +typedef struct Block Block; + +struct Block +{ + uchar *pos; + uchar *limit; +}; + +static int +blgetc(void *vb) +{ + Block *b; + + b = vb; + if(b->pos >= b->limit) + return -1; + return *b->pos++; +} + +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 +inflateblock(uchar *dst, int dsize, uchar *src, int ssize) +{ + Block bd, bs; + int ok; + + bs.pos = src; + bs.limit = src + ssize; + + bd.pos = dst; + bd.limit = dst + dsize; + + ok = inflate(&bd, blwrite, &bs, blgetc); + if(ok != FlateOk) + return ok; + return bd.pos - dst; +} |