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Unpack and beautify JavaScript from command-line
// blog post: http://blog.slashpoundbang.com/post/2488598258/running-javascript-from-the-command-line-with-v8
#include <v8.h>
#include <string.h>
#include <stdlib.h>
#include "beautify.h"
#include "unpack_and_beautify.h"
#define BUF_SIZE 1024
using namespace v8;
Handle<String> readFile(const char* name) {
FILE *file = stdin;
int len = 0;
char *buf;
Handle<String> result;
if (name) {
file = fopen(name, "rb");
if (file == NULL) {
return Handle<String>();
}
fseek(file, 0, SEEK_END);
len = ftell(file);
rewind(file);
buf = new char[len + 1];
buf[len] = '\0';
fread(buf, 1, len, file);
fclose(file);
result = String::New(buf);
delete[] buf;
}
else {
char c;
buf = (char*)malloc(BUF_SIZE + 1);
int buf_size = BUF_SIZE + 1;
while ((c = getchar()) != EOF) {
buf[len++] = c;
if (len == buf_size) {
buf_size <<= 1;
buf = (char*)realloc(buf, buf_size);
}
}
buf[len] = '\0';
result = String::New(buf);
free(buf);
}
return result;
}
int main(int argc, char* argv[]) {
HandleScope handle_scope;
Handle<String> source = readFile(argv[1]);
Handle<ObjectTemplate> global = ObjectTemplate::New();
global->Set("source", source);
Persistent<Context> context = Context::New(NULL, global);
Context::Scope context_scope(context);
Handle<Script> beautifyScript = Script::Compile(String::New(beautify_code));
beautifyScript->Run();
Handle<Script> unpackScript = Script::Compile(String::New(unpack_code));
unpackScript->Run();
Handle<Script> runnerScript = Script::Compile(String::New("unpack_and_beautify(source);"));
Handle<Value> result = runnerScript->Run();
context.Dispose();
if (!result.IsEmpty() && !result->IsUndefined()) {
String::Utf8Value str(result);
fprintf(stdout, "%s\n", *str);
}
return 0;
}
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