Reviewers: Yang,
Message:
Please take a look.
Description:
Send non-JS output (e.g. errors) to stderr, instead of stdout.
The Chromium build uses this executable and needs to be able to
separate errors from JS output.
Please review this at https://codereview.chromium.org/11365202/
SVN Base: http://v8.googlecode.com/svn/branches/bleeding_edge/
Affected files:
M samples/shell.cc
Index: samples/shell.cc
===================================================================
--- samples/shell.cc (revision 12939)
+++ samples/shell.cc (working copy)
@@ -72,7 +72,7 @@
v8::HandleScope handle_scope;
v8::Persistent<v8::Context> context = CreateShellContext();
if (context.IsEmpty()) {
- printf("Error creating context\n");
+ fprintf(stderr, "Error creating context\n");
return 1;
}
context->Enter();
@@ -226,7 +226,8 @@
// alone JavaScript engines.
continue;
} else if (strncmp(str, "--", 2) == 0) {
- printf("Warning: unknown flag %s.\nTry --help for options\n", str);
+ fprintf(stderr,
+ "Warning: unknown flag %s.\nTry --help for options\n", str);
} else if (strcmp(str, "-e") == 0 && i + 1 < argc) {
// Execute argument given to -e option directly.
v8::Handle<v8::String> file_name = v8::String::New("unnamed");
@@ -237,7 +238,7 @@
v8::Handle<v8::String> file_name = v8::String::New(str);
v8::Handle<v8::String> source = ReadFile(str);
if (source.IsEmpty()) {
- printf("Error reading '%s'\n", str);
+ fprintf(stderr, "Error reading '%s'\n", str);
continue;
}
if (!ExecuteString(source, file_name, false, true)) return 1;
@@ -249,20 +250,20 @@
// The read-eval-execute loop of the shell.
void RunShell(v8::Handle<v8::Context> context) {
- printf("V8 version %s [sample shell]\n", v8::V8::GetVersion());
+ fprintf(stderr, "V8 version %s [sample shell]\n", v8::V8::GetVersion());
static const int kBufferSize = 256;
// Enter the execution environment before evaluating any code.
v8::Context::Scope context_scope(context);
v8::Local<v8::String> name(v8::String::New("(shell)"));
while (true) {
char buffer[kBufferSize];
- printf("> ");
+ fprintf(stderr, "> ");
char* str = fgets(buffer, kBufferSize, stdin);
if (str == NULL) break;
v8::HandleScope handle_scope;
ExecuteString(v8::String::New(str), name, true, true);
}
- printf("\n");
+ fprintf(stderr, "\n");
}
@@ -310,31 +311,31 @@
if (message.IsEmpty()) {
// V8 didn't provide any extra information about this error; just
// print the exception.
- printf("%s\n", exception_string);
+ fprintf(stderr, "%s\n", exception_string);
} else {
// Print (filename):(line number): (message).
v8::String::Utf8Value filename(message->GetScriptResourceName());
const char* filename_string = ToCString(filename);
int linenum = message->GetLineNumber();
- printf("%s:%i: %s\n", filename_string, linenum, exception_string);
+ fprintf(stderr, "%s:%i: %s\n", filename_string, linenum,
exception_string);
// Print line of source code.
v8::String::Utf8Value sourceline(message->GetSourceLine());
const char* sourceline_string = ToCString(sourceline);
- printf("%s\n", sourceline_string);
+ fprintf(stderr, "%s\n", sourceline_string);
// Print wavy underline (GetUnderline is deprecated).
int start = message->GetStartColumn();
for (int i = 0; i < start; i++) {
- printf(" ");
+ fprintf(stderr, " ");
}
int end = message->GetEndColumn();
for (int i = start; i < end; i++) {
- printf("^");
+ fprintf(stderr, "^");
}
- printf("\n");
+ fprintf(stderr, "\n");
v8::String::Utf8Value stack_trace(try_catch->StackTrace());
if (stack_trace.length() > 0) {
const char* stack_trace_string = ToCString(stack_trace);
- printf("%s\n", stack_trace_string);
+ fprintf(stderr, "%s\n", stack_trace_string);
}
}
}
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