prefix http parser to prevent symbol clashes

Sources/CNIOHTTPParser/update_and_patch_http_parser.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+set -eu
+
+here="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+case "$(uname -s)" in
+    Darwin)
+        sed=gsed
+        ;;
+    *)
+        sed=sed
+        ;;
+esac
+
+for f in http_parser.c http_parser.h; do
+    ( echo "/* Additional changes for SwiftNIO:"
+      echo "    - prefixed all symbols by 'c_nio_'"
+      echo "*/"
+      curl -Ls "https://raw.githubusercontent.com/nodejs/http-parser/master/$f"
+    ) > "$here/c_nio_$f"
+
+    "$sed" -i \
+        -e 's#"http_parser.h"#"include/c_nio_http_parser.h"#g' \
+        -e 's/\b\(http_body_is_final\)/c_nio_\1/g' \
+        -e 's/\b\(http_errno_description\)/c_nio_\1/g' \
+        -e 's/\b\(http_errno_name\)/c_nio_\1/g' \
+        -e 's/\b\(http_message_needs_eof\)/c_nio_\1/g' \
+        -e 's/\b\(http_method_str\)/c_nio_\1/g' \
+        -e 's/\b\(http_parser_execute\)/c_nio_\1/g' \
+        -e 's/\b\(http_parser_init\)/c_nio_\1/g' \
+        -e 's/\b\(http_parser_parse_url\)/c_nio_\1/g' \
+        -e 's/\b\(http_parser_pause\)/c_nio_\1/g' \
+        -e 's/\b\(http_parser_settings_init\)/c_nio_\1/g' \
+        -e 's/\b\(http_parser_url_init\)/c_nio_\1/g' \
+        -e 's/\b\(http_parser_version\)/c_nio_\1/g' \
+        -e 's/\b\(http_should_keep_alive\)/c_nio_\1/g' \
+        "$here/c_nio_$f"
+
+tmp=$(mktemp -d /tmp/.test_compile_XXXXXX)
+
+clang -o "$tmp/test.o" -c "$here/c_nio_http_parser.c"
+num_non_nio=$(nm "$tmp/test.o" | grep ' T ' | grep -v c_nio | wc -l)
+
+test 0 -eq $num_non_nio || {
+    echo "ERROR: $num_non_nio exported non-prefixed symbols found"
+    exit 1
+}
+
+rm -rf "$tmp"
+done

Sources/NIOHTTP1/HTTPDecoder.swift

@@ -244,16 +244,16 @@ public class HTTPDecoder<HTTPMessageT>: ByteToMessageDecoder, AnyHTTPDecoder {
     
     public func decoderAdded(ctx: ChannelHandlerContext) throws {
         if HTTPMessageT.self == HTTPServerRequestPart.self {
-            http_parser_init(&parser, HTTP_REQUEST)
+            c_nio_http_parser_init(&parser, HTTP_REQUEST)
         } else if HTTPMessageT.self == HTTPClientResponsePart.self {
-            http_parser_init(&parser, HTTP_RESPONSE)
+            c_nio_http_parser_init(&parser, HTTP_RESPONSE)
         } else {
             fatalError("the impossible happened: MsgT neither HTTPClientRequestPart nor HTTPClientResponsePart but \(HTTPMessageT.self)")
         }
 
         parser.data = Unmanaged.passUnretained(ctx).toOpaque()
 
-        http_parser_settings_init(&settings)
+        c_nio_http_parser_settings_init(&settings)
 
         settings.on_message_begin = { parser in
             let handler = evacuateHTTPDecoder(parser)
@@ -412,7 +412,7 @@ public class HTTPDecoder<HTTPMessageT>: ByteToMessageDecoder, AnyHTTPDecoder {
             state.baseAddress = pointer.baseAddress!.assumingMemoryBound(to: UInt8.self)
             
             let result = state.baseAddress!.withMemoryRebound(to: Int8.self, capacity: pointer.count, { p in
-                http_parser_execute(&parser, &settings, p.advanced(by: buffer.readerIndex), buffer.readableBytes)
+                c_nio_http_parser_execute(&parser, &settings, p.advanced(by: buffer.readerIndex), buffer.readableBytes)
             })
             
             state.baseAddress = nil