Remove magic values as exit codes in test application (#777)

test/api/call_wren_call_root.c

@@ -2,6 +2,7 @@
 #include <string.h>
 
 #include "wren.h"
+#include "../test.h"
 
 int callWrenCallRootRunTests(WrenVM* vm)
 {
@@ -17,7 +18,7 @@ int callWrenCallRootRunTests(WrenVM* vm)
   WrenInterpretResult result = wrenCall(vm, run);
   if (result == WREN_RESULT_RUNTIME_ERROR)
   {
-    exitCode = 70;
+    exitCode = WREN_EX_SOFTWARE;
   }
   else
   {

test/main.c

@@ -47,8 +47,8 @@ int main(int argc, const char* argv[]) {
     exitCode = APITest_Run(vm, testName);
   }
 
-  if (result == WREN_RESULT_COMPILE_ERROR) return 65; // EX_DATAERR.
-  if (result == WREN_RESULT_RUNTIME_ERROR) return 70; // EX_SOFTWARE.
+  if (result == WREN_RESULT_COMPILE_ERROR) return WREN_EX_DATAERR;
+  if (result == WREN_RESULT_RUNTIME_ERROR) return WREN_EX_SOFTWARE;
 
   wrenFreeVM(vm);
 

test/test.c

@@ -320,7 +320,7 @@
     if (buffer == NULL)
     {
       fprintf(stderr, "Could not read file \"%s\".\n", path);
-      exit(74);
+      exit(WREN_EX_IOERR);
     }
 
     // Read the entire file.
@@ -328,7 +328,7 @@
     if (bytesRead < fileSize)
     {
       fprintf(stderr, "Could not read file \"%s\".\n", path);
-      exit(74);
+      exit(WREN_EX_IOERR);
     }
 
     // Terminate the string.
@@ -421,7 +421,7 @@
     if (source == NULL)
     {
       fprintf(stderr, "Could not find file \"%s\".\n", path);
-      exit(66);
+      exit(WREN_EX_NOINPUT);
     }
 
     // If it looks like a relative path, make it explicitly relative so that we
@@ -452,7 +452,7 @@
     if (argc < 2)
     {
       printf("This is a Wren test runner.\nUsage: wren_test [file]\n");
-      return 64; // EX_USAGE.
+      return WREN_EX_USAGE;
     }
 
     if (argc == 2 && strcmp(argv[1], "--version") == 0)

test/test.h

@@ -6,6 +6,23 @@
 #include <string.h>
 #include "wren.h"
 
+// Exit codes used by the wren binaries, following the BSD standard
+//
+// The interpreter was used with an incorrect number of arguments
+#define WREN_EX_USAGE 64
+
+// Compilation error
+#define WREN_EX_DATAERR 65
+
+// Runtime error
+#define WREN_EX_SOFTWARE 70
+
+// Cannot open input file
+#define WREN_EX_NOINPUT 66
+
+// I/O Error
+#define WREN_EX_IOERR 74
+
 // The maximum number of components in a path. We can't normalize a path that
 // contains more than this number of parts. The number here assumes a max path
 // length of 4096, which is common on Linux, and then assumes each component is
@@ -69,4 +86,4 @@ typedef struct
   WrenInterpretResult runFile(WrenVM* vm, const char* path);
   int handle_args(int argc, const char* argv[]);
 
-#endif //WREN_TEST_H
+#endif //WREN_TEST_H