til: add exclusions to til_get_module_names()

There's often a need to exclude specific modules, though it's
often a hacky kludge.  It's something relied upon currently for
preventing dangerous recursion scenarios, which will likely get
fixed up more robustly in the future.

2 files changed, 13 insertions, 2 deletions

diff --git a/src/til.c b/src/til.c
index d006926..66f4870 100644
--- a/src/til.c
+++ b/src/til.c
@@ -167,7 +167,7 @@ void til_get_modules(const til_module_t ***res_modules, size_t *res_n_modules)
 }
 
 
-char * til_get_module_names(unsigned flags_excluded)
+char * til_get_module_names(unsigned flags_excluded, const char **exclusions)
 {
 	const til_module_t	**modules;
 	size_t			n_modules;
@@ -183,10 +183,21 @@ char * til_get_module_names(unsigned flags_excluded)
 	til_get_modules(&modules, &n_modules);
 	for (size_t i = 0, j = 0; i < n_modules; i++) {
 		const til_module_t	*mod = modules[i];
+		const char		**exclusion = exclusions;
 
 		if ((mod->flags & flags_excluded))
 			continue;
 
+		while (*exclusion) {
+			if (!strcmp(*exclusion, mod->name))
+				break;
+
+			exclusion++;
+		}
+
+		if (*exclusion)
+			continue;
+
 		fprintf(fp, "%s%s", j ? "," : "", mod->name);
 		j++;
 	}
diff --git a/src/til.h b/src/til.h
index 0a0cd6d..f27bdde 100644
--- a/src/til.h
+++ b/src/til.h
@@ -42,7 +42,7 @@ void til_quiesce(void);
 void til_shutdown(void);
 const til_module_t * til_lookup_module(const char *name);
 void til_get_modules(const til_module_t ***res_modules, size_t *res_n_modules);
-char * til_get_module_names(unsigned flags_excluded);
+char * til_get_module_names(unsigned flags_excluded, const char **exclusions);
 void til_module_render(til_module_context_t *context, til_stream_t *stream, unsigned ticks, til_fb_fragment_t **fragment_ptr);
 int til_module_create_context(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup, til_module_context_t **res_context);
 til_module_context_t * til_module_destroy_context(til_module_context_t *context, til_stream_t *stream);