add substitute_strerror

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/strerror.c b/lib/strerror.c
new file mode 100644
index 0000000..ac72214
--- /dev/null
+++ b/lib/strerror.c
@@ -0,0 +1,22 @@
+#include "substitute.h"
+#include "substitute-internal.h"
+
+EXPORT
+const char *substitute_strerror(int err) {
+    #define CASE(code) case code: return #code
+    switch (err) {
+        CASE(SUBSTITUTE_OK);
+        CASE(SUBSTITUTE_ERR_FUNC_TOO_SHORT);
+        CASE(SUBSTITUTE_ERR_FUNC_BAD_INSN_AT_START);
+        CASE(SUBSTITUTE_ERR_FUNC_JUMPS_TO_START);
+        CASE(SUBSTITUTE_ERR_OOM);
+        CASE(SUBSTITUTE_ERR_VM);
+        CASE(SUBSTITUTE_ERR_UNKNOWN_RELOCATION_TYPE);
+        CASE(SUBSTITUTE_ERR_NO_SUCH_SELECTOR);
+        CASE(SUBSTITUTE_ERR_TASK_FOR_PID);
+        CASE(SUBSTITUTE_ERR_MISC);
+        default:
+            return "(unknown libsubstitute error)";
+    }
+    #undef CASE
+}