1 files changed, 46 insertions, 0 deletions
diff --git a/shared/errcatch.c b/shared/errcatch.c
new file mode 100644
index 0000000..ff7fc93
--- /dev/null
+++ b/shared/errcatch.c
@@ -0,0 +1,46 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "errcatch.h"
+
+w2_s_error *g_w2_error_buffer[W2_ERROR_BUFFER_SIZE] = {};
+uint8_t g_w2_error_index							= 0;
+uint8_t g_w2_error_offset							= 0;
+bool g_w2_error_buffer_full						= 0;
+bool g_w2_error_uncaught							= 0;
+
+void w2_errcatch_main() {
+	while (g_w2_error_offset != g_w2_error_index) {
+		w2_s_error *error = g_w2_error_buffer[g_w2_error_offset];
+		w2_errcatch_handle_error(error);
+		g_w2_error_offset = (g_w2_error_offset + 1) % W2_ERROR_BUFFER_SIZE;
+	}
+	if (g_w2_error_buffer_full) {
+		w2_errcatch_throw(W2_E_WARN_ERR_BUFFER_FULL);
+		g_w2_error_buffer_full = 0;
+	}
+	if (g_w2_error_uncaught) {
+		w2_errcatch_throw(W2_E_WARN_UNCAUGHT_ERROR);
+		g_w2_error_uncaught = 0;
+	}
+}
+
+w2_s_error *w2_alloc_error(w2_e_errorcode code, uint16_t length, const char *message) {
+	w2_s_error *error = malloc(sizeof(w2_s_error) + length);
+	memcpy(error, &(w2_s_error const){.code = code, .message_length = length}, sizeof(w2_s_error));
+	strncpy(error->message, message, length);
+
+	return error;
+}
+
+void w2_errcatch_throw(w2_e_errorcode code) { w2_errcatch_throw_msg(code, 0, ""); }
+void w2_errcatch_throw_msg(w2_e_errorcode code, uint16_t length, const char *message) {
+	uint8_t next_index	   = (g_w2_error_index + 1) % W2_ERROR_BUFFER_SIZE;
+	g_w2_error_buffer_full = next_index == g_w2_error_offset;
+	free(g_w2_error_buffer[g_w2_error_index]);
+	w2_s_error *error					= w2_alloc_error(code, length, message);
+	g_w2_error_buffer[g_w2_error_index] = error;
+	if (g_w2_error_buffer_full) return;
+	g_w2_error_index = next_index;
+}
+