1 files changed, 100 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/http_chunks.h b/Utilities/cmcurl/lib/http_chunks.h
new file mode 100644
index 0000000000..ed50713162
--- /dev/null
+++ b/Utilities/cmcurl/lib/http_chunks.h
@@ -0,0 +1,100 @@
+#ifndef HEADER_CURL_HTTP_CHUNKS_H
+#define HEADER_CURL_HTTP_CHUNKS_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+
+struct connectdata;
+
+/*
+ * The longest possible hexadecimal number we support in a chunked transfer.
+ * Neither RFC2616 nor the later HTTP specs define a maximum chunk size.
+ * For 64 bit curl_off_t we support 16 digits. For 32 bit, 8 digits.
+ */
+#define CHUNK_MAXNUM_LEN (SIZEOF_CURL_OFF_T * 2)
+
+typedef enum {
+  /* await and buffer all hexadecimal digits until we get one that isn't a
+     hexadecimal digit. When done, we go CHUNK_LF */
+  CHUNK_HEX,
+
+  /* wait for LF, ignore all else */
+  CHUNK_LF,
+
+  /* We eat the amount of data specified. When done, we move on to the
+     POST_CR state. */
+  CHUNK_DATA,
+
+  /* POSTLF should get a CR and then a LF and nothing else, then move back to
+     HEX as the CRLF combination marks the end of a chunk. A missing CR is no
+     big deal. */
+  CHUNK_POSTLF,
+
+  /* Used to mark that we're out of the game.  NOTE: that there's a 'datasize'
+     field in the struct that will tell how many bytes that were not passed to
+     the client in the end of the last buffer! */
+  CHUNK_STOP,
+
+  /* At this point optional trailer headers can be found, unless the next line
+     is CRLF */
+  CHUNK_TRAILER,
+
+  /* A trailer CR has been found - next state is CHUNK_TRAILER_POSTCR.
+     Next char must be a LF */
+  CHUNK_TRAILER_CR,
+
+  /* A trailer LF must be found now, otherwise CHUNKE_BAD_CHUNK will be
+     signalled If this is an empty trailer CHUNKE_STOP will be signalled.
+     Otherwise the trailer will be broadcasted via Curl_client_write() and the
+     next state will be CHUNK_TRAILER */
+  CHUNK_TRAILER_POSTCR
+} ChunkyState;
+
+typedef enum {
+  CHUNKE_STOP = -1,
+  CHUNKE_OK = 0,
+  CHUNKE_TOO_LONG_HEX = 1,
+  CHUNKE_ILLEGAL_HEX,
+  CHUNKE_BAD_CHUNK,
+  CHUNKE_BAD_ENCODING,
+  CHUNKE_OUT_OF_MEMORY,
+  CHUNKE_PASSTHRU_ERROR, /* Curl_httpchunk_read() returns a CURLcode to use */
+  CHUNKE_LAST
+} CHUNKcode;
+
+const char *Curl_chunked_strerror(CHUNKcode code);
+
+struct Curl_chunker {
+  curl_off_t datasize;
+  ChunkyState state;
+  unsigned char hexindex;
+  char hexbuffer[ CHUNK_MAXNUM_LEN + 1]; /* +1 for null-terminator */
+};
+
+/* The following functions are defined in http_chunks.c */
+void Curl_httpchunk_init(struct Curl_easy *data);
+CHUNKcode Curl_httpchunk_read(struct Curl_easy *data, char *datap,
+                              ssize_t length, ssize_t *wrote,
+                              CURLcode *passthru);
+
+#endif /* HEADER_CURL_HTTP_CHUNKS_H */