add an embedder API to stringify error codes

This commit adds uvwasi_embedder_err_code_to_string(), which converts a uvwasi error code into a string representation of the error code.
nodejs · Dec 14, 2019 · 447676a · 447676a
1 parent db9719e
commit 447676a
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diff --git a/include/uvwasi.h b/include/uvwasi.h
@@ -69,6 +69,7 @@ void uvwasi_destroy(uvwasi_t* uvwasi);
 uvwasi_errno_t uvwasi_embedder_remap_fd(uvwasi_t* uvwasi,
                                         const uvwasi_fd_t fd,
                                         uv_file new_host_fd);
+const char* uvwasi_embedder_err_code_to_string(uvwasi_errno_t code);
 
 
 // WASI system call API.

diff --git a/src/uvwasi.c b/src/uvwasi.c
@@ -2150,3 +2150,90 @@ uvwasi_errno_t uvwasi_sock_shutdown(uvwasi_t* uvwasi,
                     https://github.com/WebAssembly/WASI/issues/4 */
   return UVWASI_ENOTSUP;
 }
+
+
+const char* uvwasi_embedder_err_code_to_string(uvwasi_errno_t code) {
+  switch (code) {
+#define V(errcode) case errcode: return #errcode;
+    V(UVWASI_E2BIG)
+    V(UVWASI_EACCES)
+    V(UVWASI_EADDRINUSE)
+    V(UVWASI_EADDRNOTAVAIL)
+    V(UVWASI_EAFNOSUPPORT)
+    V(UVWASI_EAGAIN)
+    V(UVWASI_EALREADY)
+    V(UVWASI_EBADF)
+    V(UVWASI_EBADMSG)
+    V(UVWASI_EBUSY)
+    V(UVWASI_ECANCELED)
+    V(UVWASI_ECHILD)
+    V(UVWASI_ECONNABORTED)
+    V(UVWASI_ECONNREFUSED)
+    V(UVWASI_ECONNRESET)
+    V(UVWASI_EDEADLK)
+    V(UVWASI_EDESTADDRREQ)
+    V(UVWASI_EDOM)
+    V(UVWASI_EDQUOT)
+    V(UVWASI_EEXIST)
+    V(UVWASI_EFAULT)
+    V(UVWASI_EFBIG)
+    V(UVWASI_EHOSTUNREACH)
+    V(UVWASI_EIDRM)
+    V(UVWASI_EILSEQ)
+    V(UVWASI_EINPROGRESS)
+    V(UVWASI_EINTR)
+    V(UVWASI_EINVAL)
+    V(UVWASI_EIO)
+    V(UVWASI_EISCONN)
+    V(UVWASI_EISDIR)
+    V(UVWASI_ELOOP)
+    V(UVWASI_EMFILE)
+    V(UVWASI_EMLINK)
+    V(UVWASI_EMSGSIZE)
+    V(UVWASI_EMULTIHOP)
+    V(UVWASI_ENAMETOOLONG)
+    V(UVWASI_ENETDOWN)
+    V(UVWASI_ENETRESET)
+    V(UVWASI_ENETUNREACH)
+    V(UVWASI_ENFILE)
+    V(UVWASI_ENOBUFS)
+    V(UVWASI_ENODEV)
+    V(UVWASI_ENOENT)
+    V(UVWASI_ENOEXEC)
+    V(UVWASI_ENOLCK)
+    V(UVWASI_ENOLINK)
+    V(UVWASI_ENOMEM)
+    V(UVWASI_ENOMSG)
+    V(UVWASI_ENOPROTOOPT)
+    V(UVWASI_ENOSPC)
+    V(UVWASI_ENOSYS)
+    V(UVWASI_ENOTCONN)
+    V(UVWASI_ENOTDIR)
+    V(UVWASI_ENOTEMPTY)
+    V(UVWASI_ENOTRECOVERABLE)
+    V(UVWASI_ENOTSOCK)
+    V(UVWASI_ENOTSUP)
+    V(UVWASI_ENOTTY)
+    V(UVWASI_ENXIO)
+    V(UVWASI_EOVERFLOW)
+    V(UVWASI_EOWNERDEAD)
+    V(UVWASI_EPERM)
+    V(UVWASI_EPIPE)
+    V(UVWASI_EPROTO)
+    V(UVWASI_EPROTONOSUPPORT)
+    V(UVWASI_EPROTOTYPE)
+    V(UVWASI_ERANGE)
+    V(UVWASI_EROFS)
+    V(UVWASI_ESPIPE)
+    V(UVWASI_ESRCH)
+    V(UVWASI_ESTALE)
+    V(UVWASI_ETIMEDOUT)
+    V(UVWASI_ETXTBSY)
+    V(UVWASI_EXDEV)
+    V(UVWASI_ENOTCAPABLE)
+    V(UVWASI_ESUCCESS)
+#undef V
+    default:
+      return "UVWASI_UNKNOWN_ERROR";
+  }
+}
diff --git a/test/test-err-to-string.c b/test/test-err-to-string.c
@@ -0,0 +1,21 @@
+#include <assert.h>
+#include <string.h>
+#include "uvwasi.h"
+
+int main(void) {
+  /* Verify that a few uvwasi_embedder_err_code_to_string() calls work. */
+  assert(0 == strcmp(uvwasi_embedder_err_code_to_string(UVWASI_E2BIG),
+                     "UVWASI_E2BIG"));
+  assert(0 == strcmp(uvwasi_embedder_err_code_to_string(UVWASI_EBADF),
+                     "UVWASI_EBADF"));
+  assert(0 == strcmp(uvwasi_embedder_err_code_to_string(UVWASI_ENOENT),
+                     "UVWASI_ENOENT"));
+  assert(0 == strcmp(uvwasi_embedder_err_code_to_string(UVWASI_ENOTCAPABLE),
+                     "UVWASI_ENOTCAPABLE"));
+  assert(0 == strcmp(uvwasi_embedder_err_code_to_string(UVWASI_ESUCCESS),
+                     "UVWASI_ESUCCESS"));
+  assert(0 == strcmp(uvwasi_embedder_err_code_to_string(34000),
+                     "UVWASI_UNKNOWN_ERROR"));
+
+  return 0;
+}