Refactor snapshot support

The snapshot support needs to be split between output- and config-related
functions to get the layering between shared.c and ui-*.c right. There
is also some codestyle-issues which needs fixing to make the snapshot
functions more similar to the rest of the cgit code.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cgit.h

@@ -177,10 +177,18 @@ struct cgit_context {
 	struct cgit_page page;
 };
 
+struct cgit_snapshot_format {
+	const char *suffix;
+	const char *mimetype;
+	write_archive_fn_t write_func;
+	int bit;
+};
+
 extern const char *cgit_version;
 
 extern struct cgit_repolist cgit_repolist;
 extern struct cgit_context ctx;
+extern const struct cgit_snapshot_format cgit_snapshot_formats[];
 extern int cgit_cmd;
 
 extern void cgit_prepare_context(struct cgit_context *ctx);

shared.c

@@ -479,3 +479,30 @@ void cgit_diff_commit(struct commit *commit, filepair_fn fn)
 		old_sha1 = commit->parents->item->object.sha1;
 	cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
 }
+
+int cgit_parse_snapshots_mask(const char *str)
+{
+	const struct cgit_snapshot_format *f;
+	static const char *delim = " \t,:/|;";
+	int tl, sl, rv = 0;
+
+	/* favor legacy setting */
+	if(atoi(str))
+		return 1;
+	for(;;) {
+		str += strspn(str,delim);
+		tl = strcspn(str,delim);
+		if (!tl)
+			break;
+		for (f = cgit_snapshot_formats; f->suffix; f++) {
+			sl = strlen(f->suffix);
+			if((tl == sl && !strncmp(f->suffix, str, tl)) ||
+			   (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
+				rv |= f->bit;
+				break;
+			}
+		}
+		str += tl;
+	}
+	return rv;
+}

ui-shared.c

@@ -573,4 +573,19 @@ void cgit_print_filemode(unsigned short mode)
 	html_fileperm(mode);
 }
 
-/* vim:set sw=8: */
+void cgit_print_snapshot_links(const char *repo, const char *head,
+			       const char *hex, int snapshots)
+{
+	const struct cgit_snapshot_format* f;
+    	char *filename;
+
+	for (f = cgit_snapshot_formats; f->suffix; f++) {
+		if (!(snapshots & f->bit))
+			continue;
+		filename = fmt("%s-%s%s", cgit_repobasename(repo), hex,
+			       f->suffix);
+		cgit_snapshot_link(filename, NULL, NULL, (char *)head,
+				   (char *)hex, filename);
+		html("<br/>");
+	}
+}

ui-snapshot.c

@@ -55,105 +55,59 @@ static int write_tar_bzip2_archive(struct archiver_args *args)
 	return write_compressed_tar_archive(args,"bzip2");
 }
 
-static const struct snapshot_archive_t {
+const struct cgit_snapshot_format cgit_snapshot_formats[] = {
-    	const char *suffix;
-	const char *mimetype;
-	write_archive_fn_t write_func;
-	int bit;
-}	snapshot_archives[] = {
 	{ ".zip", "application/x-zip", write_zip_archive, 0x1 },
 	{ ".tar.gz", "application/x-tar", write_tar_gzip_archive, 0x2 },
 	{ ".tar.bz2", "application/x-tar", write_tar_bzip2_archive, 0x4 },
-	{ ".tar", "application/x-tar", write_tar_archive, 0x8 }
+	{ ".tar", "application/x-tar", write_tar_archive, 0x8 },
+	{}
 };
 
-#define snapshot_archives_len (sizeof(snapshot_archives) / sizeof(*snapshot_archives))
+static int make_snapshot(const struct cgit_snapshot_format *format,
-
+			 const char *hex, const char *prefix,
-void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
+			 const char *filename)
-			 const char *filename, int snapshots)
 {
-	const struct snapshot_archive_t* sat;
 	struct archiver_args args;
 	struct commit *commit;
 	unsigned char sha1[20];
-	int f, sl, fnl = strlen(filename);
 
-	for(f=0; f<snapshot_archives_len; f++) {
-		sat = &snapshot_archives[f];
-		if(!(snapshots & sat->bit))
-			continue;
-		sl = strlen(sat->suffix);
-		if(fnl<sl || strcmp(&filename[fnl-sl],sat->suffix))
-			continue;
-		if (!hex)
-			hex = head;
 	if(get_sha1(hex, sha1)) {
 		cgit_print_error(fmt("Bad object id: %s", hex));
-			return;
+		return 1;
 	}
 	commit = lookup_commit_reference(sha1);
 	if(!commit) {
 		cgit_print_error(fmt("Not a commit reference: %s", hex));
-			return;;
+		return 1;
 	}
 	memset(&args, 0, sizeof(args));
 	args.base = fmt("%s/", prefix);
 	args.tree = commit->tree;
 	args.time = commit->date;
-		ctx.page.mimetype = xstrdup(sat->mimetype);
+	ctx.page.mimetype = xstrdup(format->mimetype);
 	ctx.page.filename = xstrdup(filename);
 	cgit_print_http_headers(&ctx);
-		(*sat->write_func)(&args);
+	format->write_func(&args);
+	return 0;
+}
+
+void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
+			 const char *filename, int snapshots)
+{
+	const struct cgit_snapshot_format* f;
+	int sl, fnl;
+
+	fnl = strlen(filename);
+	if (!hex)
+		hex = head;
+	for (f = cgit_snapshot_formats; f->suffix; f++) {
+		if (!(snapshots & f->bit))
+			continue;
+		sl = strlen(f->suffix);
+		if(fnl < sl || strcmp(&filename[fnl-sl], f->suffix))
+			continue;
+		make_snapshot(f, hex, prefix, filename);
 		return;
 	}
 	cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
 }
-
-void cgit_print_snapshot_links(const char *repo, const char *head,
-			       const char *hex, int snapshots)
-{
-	const struct snapshot_archive_t* sat;
-    	char *filename;
-	int f;
-
-	for(f=0; f<snapshot_archives_len; f++) {
-		sat = &snapshot_archives[f];
-		if(!(snapshots & sat->bit))
-			continue;
-		filename = fmt("%s-%s%s", cgit_repobasename(repo), hex,
-			       sat->suffix);
-		cgit_snapshot_link(filename, NULL, NULL, (char *)head,
-				   (char *)hex, filename);
-		html("<br/>");
-	}
-}
-
-int cgit_parse_snapshots_mask(const char *str)
-{
-	const struct snapshot_archive_t* sat;
-	static const char *delim = " \t,:/|;";
-	int f, tl, sl, rv = 0;
-
-	/* favor legacy setting */
-	if(atoi(str))
-		return 1;
-	for(;;) {
-		str += strspn(str,delim);
-		tl = strcspn(str,delim);
-		if(!tl)
-			break;
-		for(f=0; f<snapshot_archives_len; f++) {
-			sat = &snapshot_archives[f];
-			sl = strlen(sat->suffix);
-			if((tl == sl && !strncmp(sat->suffix, str, tl)) ||
-			   (tl == sl-1 && !strncmp(sat->suffix+1, str, tl-1))) {
-				rv |= sat->bit;
-				break;
-			}
-		}
-		str += tl;
-	}
-	return rv;
-}
-
-/* vim:set sw=8: */