netsurf: add wrapper

Signed-off-by: Francis Bouvier <francis.bouvier@gmail.com>

build.zig

@@ -115,4 +115,10 @@ fn linkNetSurf(step: *std.build.LibExeObjStep) void {
         step.addObjectFile(.{ .path = ns ++ "/lib/" ++ lib ++ ".a" });
     }
     step.addIncludePath(.{ .path = ns ++ "/include" });
+
+    // wrapper
+    const flags = [_][]const u8{};
+    const files: [1][]const u8 = .{ns ++ "wrapper/wrapper.c"};
+    step.addCSourceFiles(&files, &flags);
+    step.addIncludePath(.{ .path = ns ++ "wrapper" });
 }

vendor/netsurf/wrapper/wrapper.c

@@ -0,0 +1,77 @@
+#include <stdio.h>
+
+#include <dom/dom.h>
+#include <dom/bindings/hubbub/parser.h>
+
+/**
+ * Generate a LibDOM document DOM from an HTML file
+ *
+ * \param file  The file path
+ * \return  pointer to DOM document, or NULL on error
+ */
+dom_document *wr_create_doc_dom_from_file(char *filename)
+{
+	size_t buffer_size = 1024;
+	dom_hubbub_parser *parser = NULL;
+	FILE *handle;
+	int chunk_length;
+	dom_hubbub_error error;
+	dom_hubbub_parser_params params;
+	dom_document *doc;
+	unsigned char buffer[buffer_size];
+
+	params.enc = NULL;
+	params.fix_enc = true;
+	params.enable_script = false;
+	params.msg = NULL;
+	params.script = NULL;
+	params.ctx = NULL;
+	params.daf = NULL;
+
+	/* Create Hubbub parser */
+	error = dom_hubbub_parser_create(&params, &parser, &doc);
+	if (error != DOM_HUBBUB_OK) {
+		printf("Can't create Hubbub Parser\n");
+		return NULL;
+	}
+
+	/* Open input file */
+	handle = fopen(filename, "rb");
+	if (handle == NULL) {
+		dom_hubbub_parser_destroy(parser);
+		printf("Can't open test input file: %s\n", filename);
+		return NULL;
+	}
+
+	/* Parse input file in chunks */
+	chunk_length = buffer_size;
+	while (chunk_length == buffer_size) {
+		chunk_length = fread(buffer, 1, buffer_size, handle);
+		error = dom_hubbub_parser_parse_chunk(parser, buffer,
+				chunk_length);
+		if (error != DOM_HUBBUB_OK) {
+			dom_hubbub_parser_destroy(parser);
+			printf("Parsing errors occur\n");
+			return NULL;
+		}
+	}
+
+	/* Done parsing file */
+	error = dom_hubbub_parser_completed(parser);
+	if (error != DOM_HUBBUB_OK) {
+		dom_hubbub_parser_destroy(parser);
+		printf("Parsing error when construct DOM\n");
+		return NULL;
+	}
+
+	/* Finished with parser */
+	dom_hubbub_parser_destroy(parser);
+
+	/* Close input file */
+	if (fclose(handle) != 0) {
+	  printf("Can't close test input file: %s\n", filename);
+		return NULL;
+	}
+
+	return doc;
+}

vendor/netsurf/wrapper/wrapper.h

@@ -0,0 +1,8 @@
+#ifndef wrapper_dom_h_
+#define wrapper_dom_h_
+
+#include <dom/dom.h>
+
+dom_document *wr_create_doc_dom_from_file(char *filename);
+
+#endif	/* wrapper_dom_h_ */