static zip_int64_t
deflate_decompress(zip_source_t *src, void *ud, void *data,
zip_uint64_t len, zip_source_cmd_t cmd)
{
struct deflate *ctx;
zip_int64_t n;
int ret;
ctx = (struct deflate *)ud;
switch (cmd) {
case ZIP_SOURCE_OPEN:
if ((n=zip_source_read(src, ctx->buffer, sizeof(ctx->buffer))) < 0) {
_zip_error_set_from_source(&ctx->error, src);
return -1;
}
ctx->zstr.zalloc = Z_NULL;
ctx->zstr.zfree = Z_NULL;
ctx->zstr.opaque = NULL;
ctx->zstr.next_in = (Bytef *)ctx->buffer;
ctx->zstr.avail_in = (uInt)n;
/* negative value to tell zlib that there is no header */
if ((ret=inflateInit2(&ctx->zstr, -MAX_WBITS)) != Z_OK) {
zip_error_set(&ctx->error, ZIP_ER_ZLIB, ret);
return -1;
}
return 0;
case ZIP_SOURCE_READ:
return decompress_read(src, ctx, data, len);
case ZIP_SOURCE_CLOSE:
inflateEnd(&ctx->zstr);
return 0;
case ZIP_SOURCE_STAT:
{
zip_stat_t *st;
st = (zip_stat_t *)data;
st->comp_method = ZIP_CM_STORE;
if (st->comp_size > 0 && st->size > 0)
st->comp_size = st->size;
return 0;
}
case ZIP_SOURCE_ERROR:
return zip_error_to_data(&ctx->error, data, len);
case ZIP_SOURCE_FREE:
free(ctx);
return 0;
case ZIP_SOURCE_SUPPORTS:
return zip_source_make_command_bitmap(ZIP_SOURCE_OPEN, ZIP_SOURCE_READ, ZIP_SOURCE_CLOSE, ZIP_SOURCE_STAT, ZIP_SOURCE_ERROR, ZIP_SOURCE_FREE, -1);
default:
zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
return -1;
}
}
static zip_int64_t
deflate_decompress(struct zip_source *src, void *ud, void *data,
zip_uint64_t len, enum zip_source_cmd cmd)
{
struct deflate *ctx;
zip_int64_t n;
int ret;
ctx = (struct deflate *)ud;
switch (cmd) {
case ZIP_SOURCE_OPEN:
if ((n=zip_source_read(src, ctx->buffer, sizeof(ctx->buffer))) < 0)
return ZIP_SOURCE_ERR_LOWER;
ctx->zstr.zalloc = Z_NULL;
ctx->zstr.zfree = Z_NULL;
ctx->zstr.opaque = NULL;
ctx->zstr.next_in = (Bytef *)ctx->buffer;
ctx->zstr.avail_in = (uInt)n /* TODO: check for overflow */;
/* negative value to tell zlib that there is no header */
if ((ret=inflateInit2(&ctx->zstr, -MAX_WBITS)) != Z_OK) {
ctx->e[0] = ZIP_ER_ZLIB;
ctx->e[1] = ret;
return -1;
}
return 0;
case ZIP_SOURCE_READ:
return decompress_read(src, ctx, data, len);
case ZIP_SOURCE_CLOSE:
inflateEnd(&ctx->zstr);
return 0;
case ZIP_SOURCE_STAT:
{
struct zip_stat *st;
st = (struct zip_stat *)data;
st->comp_method = ZIP_CM_STORE;
if (st->comp_size > 0 && st->size > 0)
st->comp_size = st->size;
}
return 0;
case ZIP_SOURCE_ERROR:
if (len < sizeof(int)*2)
return -1;
memcpy(data, ctx->e, sizeof(int)*2);
return sizeof(int)*2;
case ZIP_SOURCE_FREE:
/* TODO: inflateEnd if close was not called */
free(ctx);
return 0;
default:
ctx->e[0] = ZIP_ER_INVAL;
ctx->e[1] = 0;
return -1;
}
}
