core: parser: Parse and emit define directives

Signed-off-by: Chloe M. <chloe@aptel.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/core/emit.c b/core/emit.c
new file mode 100644
index 0000000..ec00ed2
--- /dev/null
+++ b/core/emit.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2026, Apollo Telephone Laboratories.
+ * Provided under the BSD-3 clause.
+ */
+
+#include <stdio.h>
+#include "defconf/emit.h"
+
+int
+emit_data(const char *ident, struct data_value *v)
+{
+    if (ident == NULL || v == NULL) {
+        return -1;
+    }
+
+    switch (v->type) {
+    case DATA_TYPE_INT:
+        printf("-D%s=%zu\n", ident, v->v);
+        return 0;
+    case DATA_TYPE_STR:
+        printf("-D%s=\"%s\"\n", ident, v->s);
+        return 0;
+    }
+
+    printf("fatal: got bad data value during emission\n");
+    return -1;
+}