program: add function to globally lookup exported name

Add a helper function to query the global index of a named export within
a specific source which is a prerequisite for compiling import statements.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 21 insertions, 0 deletions

diff --git a/program.c b/program.c
index 4321409..f08e0cd 100644
--- a/program.c
+++ b/program.c
@@ -846,3 +846,24 @@ uc_program_entry(uc_program_t *program)
 
 	return (uc_function_t *)program->functions.prev;
 }
+
+ssize_t
+uc_program_export_lookup(uc_program_t *program, uc_source_t *source, uc_value_t *name)
+{
+	size_t i, off;
+	ssize_t slot;
+
+	for (i = 0, off = 0; i < program->sources.count; i++) {
+		if (program->sources.entries[i] != source) {
+			off += program->sources.entries[i]->exports.count;
+			continue;
+		}
+
+		slot = uc_source_export_lookup(source, name);
+
+		if (slot > -1)
+			return off + slot;
+	}
+
+	return -1;
+}