blob: 6e38cfdd4b6483c7fe879cc50e17f4dd401a3037 [file] [log] [blame]
// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This is a utility executable used for generating hashes for pepper
// interfaces for inclusion in tools/metrics/histograms/histograms.xml. Every
// interface-version pair must have a corresponding entry in the enum there.
// The hashing logic here must match the hashing logic at
// ppapi/proxy/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "base/hash.h"
#include "base/macros.h"
int main(int argc, char **argv) {
if (argc < 2) {
fprintf(stderr, "Usage: %s <interface1> <interface2> <...>\n", argv[0]);
fprintf(stderr, "\n");
fprintf(stderr, "Prints hashes for interface names.\n");
fprintf(stderr, "Example: %s \"PPB_Var;1.1\" \"PPB_FileIO;1.2\"\n",
return 1;
for (int i = 1; i < argc; i++) {
uint32 data = base::Hash(argv[i], strlen(argv[i]));
// Strip off the signed bit because UMA doesn't support negative values,
// but takes a signed int as input.
int hash = static_cast<int>(data & 0x7fffffff);
printf("<int value=\"%d\" label=\"%s\"/>\n", hash, argv[i]);
return 0;