1 files changed, 93 insertions, 0 deletions
diff --git a/src/nghttp2_gzip.c b/src/nghttp2_gzip.c
new file mode 100644
index 0000000..0ede3c5
--- /dev/null
+++ b/src/nghttp2_gzip.c
@@ -0,0 +1,93 @@
+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp2_gzip.h"
+
+#include <assert.h>
+
+int nghttp2_gzip_inflate_new(nghttp2_gzip **inflater_ptr) {
+  int rv;
+  *inflater_ptr = malloc(sizeof(nghttp2_gzip));
+  if (*inflater_ptr == NULL) {
+    return -1;
+  }
+  (*inflater_ptr)->finished = 0;
+  (*inflater_ptr)->zst.next_in = Z_NULL;
+  (*inflater_ptr)->zst.avail_in = 0;
+  (*inflater_ptr)->zst.zalloc = Z_NULL;
+  (*inflater_ptr)->zst.zfree = Z_NULL;
+  (*inflater_ptr)->zst.opaque = Z_NULL;
+  rv = inflateInit2(&(*inflater_ptr)->zst, 47);
+  if (rv != Z_OK) {
+    free(*inflater_ptr);
+    return -1;
+  }
+  return 0;
+}
+
+void nghttp2_gzip_inflate_del(nghttp2_gzip *inflater) {
+  if (inflater != NULL) {
+    inflateEnd(&inflater->zst);
+    free(inflater);
+  }
+}
+
+int nghttp2_gzip_inflate(nghttp2_gzip *inflater, uint8_t *out,
+                         size_t *outlen_ptr, const uint8_t *in,
+                         size_t *inlen_ptr) {
+  int rv;
+  if (inflater->finished) {
+    return -1;
+  }
+  inflater->zst.avail_in = (unsigned int)*inlen_ptr;
+  inflater->zst.next_in = (unsigned char *)in;
+  inflater->zst.avail_out = (unsigned int)*outlen_ptr;
+  inflater->zst.next_out = out;
+
+  rv = inflate(&inflater->zst, Z_NO_FLUSH);
+
+  *inlen_ptr -= inflater->zst.avail_in;
+  *outlen_ptr -= inflater->zst.avail_out;
+  switch (rv) {
+  case Z_STREAM_END:
+    inflater->finished = 1;
+  /* FALL THROUGH */
+  case Z_OK:
+  case Z_BUF_ERROR:
+    return 0;
+  case Z_DATA_ERROR:
+  case Z_STREAM_ERROR:
+  case Z_NEED_DICT:
+  case Z_MEM_ERROR:
+    return -1;
+  default:
+    assert(0);
+    /* We need this for some compilers */
+    return 0;
+  }
+}
+
+int nghttp2_gzip_inflate_finished(nghttp2_gzip *inflater) {
+  return inflater->finished;
+}