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#include "internal.h"
flate·Reader*
flate·openreader(io·Reader rdr, void* r, mem·Allocator mem, void* m)
{
error err;
flate·Reader *zrdr;
zrdr = mem.alloc(m, 1, sizeof(*zrdr));
zrdr->zalloc = (void *(*)(void *, unsigned int, unsigned int))mem.alloc;
zrdr->zfree = mem.free;
zrdr->opaque = m;
zrdr->avail_in = rdr.read(r, 1, arrlen(zrdr->buf), zrdr->buf);
zrdr->next_in = zrdr->buf;
err = inflateInit(&zrdr->b.z);
switch (err) {
case Z_OK:
return zrdr;
case Z_MEM_ERROR:
errorf("zlib: not enough memory");
goto ERROR;
case Z_VERSION_ERROR:
errorf("zlib: incompatible version");
goto ERROR;
case Z_STREAM_ERROR:
errorf("zlib: incorrect input parameters");
goto ERROR;
default:
errorf("zlib: unrecognized error code");
}
ERROR:
errorf("zlib: msg: %s", zrdr->msg);
mem.free(m, zrdr);
return nil;
}
error
flate·closereader(flate·Reader *rdr)
{
int err;
flate·Reader zrdr;
zrdr = *rdr;
err = inflateEnd(&zrdr.b.z);
if (err != Z_OK) {
errorf("zlib: failed to cleanup");
return err;
}
rdr->zfree(rdr->opaque, rdr);
return 0;
}
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