scanner: add new enum-header mode

This generates a header with only enum definitions. This is useful
to share enum headers between libraries and library users.

Signed-off-by: Simon Ser <contact@emersion.fr>

1 files changed, 36 insertions, 1 deletions

diff --git a/src/scanner.c b/src/scanner.c
index c512d23..3257cb6 100644
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -67,7 +67,7 @@ enum visibility {
 static int
 usage(int ret)
 {
-	fprintf(stderr, "usage: %s [OPTION] [client-header|server-header|private-code|public-code]"
+	fprintf(stderr, "usage: %s [OPTION] [client-header|server-header|enum-header|private-code|public-code]"
 		" [input_file output_file]\n", PROGRAM_NAME);
 	fprintf(stderr, "\n");
 	fprintf(stderr, "Converts XML protocol descriptions supplied on "
@@ -1704,6 +1704,35 @@ emit_header(struct protocol *protocol, enum side side)
 }
 
 static void
+emit_enum_header(struct protocol *protocol)
+{
+	struct interface *i, *i_next;
+
+	printf("/* Generated by %s %s */\n\n", PROGRAM_NAME, WAYLAND_VERSION);
+
+	printf("#ifndef %s_ENUM_PROTOCOL_H\n"
+	       "#define %s_ENUM_PROTOCOL_H\n"
+	       "\n"
+	       "#ifdef  __cplusplus\n"
+	       "extern \"C\" {\n"
+	       "#endif\n\n",
+	       protocol->uppercase_name,
+	       protocol->uppercase_name);
+
+	wl_list_for_each_safe(i, i_next, &protocol->interface_list, link) {
+		emit_enumerations(i);
+
+		free_interface(i);
+	}
+
+	printf("#ifdef  __cplusplus\n"
+	       "}\n"
+	       "#endif\n"
+	       "\n"
+	       "#endif\n");
+}
+
+static void
 emit_null_run(struct protocol *protocol)
 {
 	int i;
@@ -1923,6 +1952,7 @@ int main(int argc, char *argv[])
 	enum {
 		CLIENT_HEADER,
 		SERVER_HEADER,
+		ENUM_HEADER,
 		PRIVATE_CODE,
 		PUBLIC_CODE,
 		CODE,
@@ -1976,6 +2006,8 @@ int main(int argc, char *argv[])
 		mode = CLIENT_HEADER;
 	else if (strcmp(argv[0], "server-header") == 0)
 		mode = SERVER_HEADER;
+	else if (strcmp(argv[0], "enum-header") == 0)
+		mode = ENUM_HEADER;
 	else if (strcmp(argv[0], "private-code") == 0)
 		mode = PRIVATE_CODE;
 	else if (strcmp(argv[0], "public-code") == 0)
@@ -2067,6 +2099,9 @@ int main(int argc, char *argv[])
 		case SERVER_HEADER:
 			emit_header(&protocol, SERVER);
 			break;
+		case ENUM_HEADER:
+			emit_enum_header(&protocol);
+			break;
 		case PRIVATE_CODE:
 			emit_code(&protocol, PRIVATE);
 			break;