1 files changed, 8 insertions, 4 deletions

diff --git a/csv.h b/csv.h
index 9ac7c05..beb82ff 100644
--- a/csv.h
+++ b/csv.h
@@ -7,12 +7,16 @@
 extern "C" {
 #endif
 
+#ifndef CSV_ERR_START_CODE
+#       define CSV_ERR_START_CODE 0
+#endif
+
 typedef enum {
         CSV_ERR_OK            = 0,
-        CSV_ERR_OUT_OF_MEMORY = -1,
-        CSV_ERR_OUT_OF_RANGE  = -2,
-        CSV_ERR_IO_READ       = -3,
-        CSV_ERR_IO_WRITE      = -4
+        CSV_ERR_OUT_OF_MEMORY = -(CSV_ERR_START_CODE + 1),
+        CSV_ERR_OUT_OF_RANGE  = -(CSV_ERR_START_CODE + 2),
+        CSV_ERR_IO_READ       = -(CSV_ERR_START_CODE + 3),
+        CSV_ERR_IO_WRITE      = -(CSV_ERR_START_CODE + 4)
 } csv_err_t;
 
 typedef struct {