src: extract common macro to util.h

PR-URL: #27512
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/env-inl.h

@@ -38,14 +38,6 @@
 
 #include <utility>
 
-#ifdef _WIN32
-/* MAX_PATH is in characters, not bytes. Make sure we have enough headroom. */
-#define CWD_BUFSIZE (MAX_PATH * 4)
-#else
-#include <climits>  // PATH_MAX on Solaris.
-#define CWD_BUFSIZE (PATH_MAX)
-#endif
-
 namespace node {
 
 inline v8::Isolate* IsolateData::isolate() const {

src/inspector_profiler.cc

@@ -5,6 +5,7 @@
 #include "node_file.h"
 #include "node_internals.h"
 #include "v8-inspector.h"
+#include "util.h"
 
 namespace node {
 namespace profiler {
@@ -23,16 +24,6 @@ using v8::Value;
 
 using v8_inspector::StringView;
 
-#ifdef _WIN32
-const char* const kPathSeparator = "\\/";
-/* MAX_PATH is in characters, not bytes. Make sure we have enough headroom. */
-#define CWD_BUFSIZE (MAX_PATH * 4)
-#else
-#include <climits>  // PATH_MAX on Solaris.
-const char* const kPathSeparator = "/";
-#define CWD_BUFSIZE (PATH_MAX)
-#endif
-
 V8ProfilerConnection::V8ProfilerConnection(Environment* env)
     : session_(env->inspector_agent()->Connect(
           std::make_unique<V8ProfilerConnection::V8ProfilerSessionDelegate>(
@@ -284,8 +275,8 @@ void EndStartedProfilers(Environment* env) {
 }
 
 std::string GetCwd() {
-  char cwd[CWD_BUFSIZE];
-  size_t size = CWD_BUFSIZE;
+  char cwd[PATH_MAX_BYTES];
+  size_t size = PATH_MAX_BYTES;
   int err = uv_cwd(cwd, &size);
   // This can fail if the cwd is deleted.
   // TODO(joyeecheung): store this in the Environment during Environment

src/node_process_methods.cc

@@ -59,13 +59,6 @@ Mutex umask_mutex;
 // used in Hrtime() and Uptime() below
 #define NANOS_PER_SEC 1000000000
 
-#ifdef _WIN32
-/* MAX_PATH is in characters, not bytes. Make sure we have enough headroom. */
-#define CHDIR_BUFSIZE (MAX_PATH * 4)
-#else
-#define CHDIR_BUFSIZE (PATH_MAX)
-#endif
-
 static void Abort(const FunctionCallbackInfo<Value>& args) {
   Abort();
 }
@@ -81,7 +74,7 @@ static void Chdir(const FunctionCallbackInfo<Value>& args) {
   if (err) {
     // Also include the original working directory, since that will usually
     // be helpful information when debugging a `chdir()` failure.
-    char buf[CHDIR_BUFSIZE];
+    char buf[PATH_MAX_BYTES];
     size_t cwd_len = sizeof(buf);
     uv_cwd(buf, &cwd_len);
     return env->ThrowUVException(err, "chdir", nullptr, buf, *path);
@@ -119,7 +112,7 @@ static void CPUUsage(const FunctionCallbackInfo<Value>& args) {
 static void Cwd(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
   CHECK(env->has_run_bootstrapping_code());
-  char buf[CHDIR_BUFSIZE];
+  char buf[PATH_MAX_BYTES];
   size_t cwd_len = sizeof(buf);
   int err = uv_cwd(buf, &cwd_len);
   if (err)

src/node_report.cc

@@ -1,8 +1,8 @@
-
 #include "node_report.h"
 #include "debug_utils.h"
 #include "node_internals.h"
 #include "node_metadata.h"
+#include "util.h"
 
 #ifdef _WIN32
 #include <Windows.h>
@@ -17,14 +17,6 @@
 #include <cwctype>
 #include <fstream>
 #include <iomanip>
-#include <climits>  // PATH_MAX
-
-#ifdef _WIN32
-/* MAX_PATH is in characters, not bytes. Make sure we have enough headroom. */
-#define PATH_MAX_BYTES (MAX_PATH * 4)
-#else
-#define PATH_MAX_BYTES (PATH_MAX)
-#endif
 
 #ifndef _WIN32
 extern char** environ;
@@ -110,7 +102,7 @@ std::string TriggerNodeReport(Isolate* isolate,
     // Regular file. Append filename to directory path if one was specified
     if (env != nullptr && options->report_directory.length() > 0) {
       std::string pathname = options->report_directory;
-      pathname += PATHSEP;
+      pathname += node::kPathSeparator;
       pathname += filename;
       outfile.open(pathname, std::ios::out | std::ios::binary);
     } else {

src/node_report.h

@@ -4,6 +4,7 @@
 #include "node_buffer.h"
 #include "uv.h"
 #include "v8.h"
+#include "util.h"
 
 #ifndef _WIN32
 #include <sys/types.h>
@@ -26,12 +27,6 @@
 
 namespace report {
 
-#ifdef _WIN32
-#define PATHSEP "\\"
-#else  // UNIX, OSX
-#define PATHSEP "/"
-#endif
-
 // Function declarations - functions in src/node_report.cc
 std::string TriggerNodeReport(v8::Isolate* isolate,
                               node::Environment* env,

src/util.h

@@ -27,6 +27,7 @@
 #include "v8.h"
 
 #include <cassert>
+#include <climits>  // PATH_MAX
 #include <csignal>
 #include <cstddef>
 #include <cstdio>
@@ -43,6 +44,16 @@
 
 namespace node {
 
+// Maybe remove kPathSeparator when cpp17 is ready
+#ifdef _WIN32
+    constexpr char kPathSeparator = '\\';
+/* MAX_PATH is in characters, not bytes. Make sure we have enough headroom. */
+#define PATH_MAX_BYTES (MAX_PATH * 4)
+#else
+    constexpr char kPathSeparator = '/';
+#define PATH_MAX_BYTES (PATH_MAX)
+#endif
+
 // These should be used in our code as opposed to the native
 // versions as they abstract out some platform and or
 // compiler version specific functionality