Add a function to generate labels

1 files changed, 13 insertions, 0 deletions

diff --git a/src/compiler.h b/src/compiler.h
index b703a99..441b665 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -20,6 +20,19 @@ void compile_fixnum(Object *obj);
 void compile_proc_call(Object *obj);
 void compile(Root *roots);
 
+char *
+generate_label(void) {
+    // Generate a unique label allocated on the heap. The caller is responsible
+    // for freeing the memory.
+    static size_t label_counter = 0;
+    char buf[32];
+    memset(buf, 0, 32);
+    sprintf(buf, ".BDLL%ld", label_counter++);
+    char * ret = malloc(strlen(buf));
+    memcpy(ret, buf, strlen(buf));
+    return ret;
+}
+
 void
 emit_file(char *file_name) {
     FILE *file = fopen(file_name, "r");