gecko-dev/toolkit/xre/MacQuirks.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2012-05-21 11:12:37 +00:00
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MacQuirks_h__
#define MacQuirks_h__
#include <sys/types.h>
#include <sys/sysctl.h>
#include "CoreFoundation/CoreFoundation.h"
#include "CoreServices/CoreServices.h"
#include "Carbon/Carbon.h"
// This file is a copy and paste from existing methods from
// libxul. This is intentional because this interpose
// library does not link with libxul.
struct VersionPart {
int32_t numA;
const char *strB; // NOT null-terminated, can be a null pointer
uint32_t strBlen;
int32_t numC;
char *extraD; // null-terminated
};
/**
* Parse a version part into a number and "extra text".
*
* @returns A pointer to the next versionpart, or null if none.
*/
static char*
ParseVP(char *part, VersionPart &result)
{
char *dot;
result.numA = 0;
result.strB = nullptr;
result.strBlen = 0;
result.numC = 0;
result.extraD = nullptr;
if (!part)
return part;
dot = strchr(part, '.');
if (dot)
*dot = '\0';
if (part[0] == '*' && part[1] == '\0') {
result.numA = INT32_MAX;
result.strB = "";
}
else {
result.numA = strtol(part, const_cast<char**>(&result.strB), 10);
}
if (!*result.strB) {
result.strB = nullptr;
result.strBlen = 0;
}
else {
if (result.strB[0] == '+') {
static const char kPre[] = "pre";
++result.numA;
result.strB = kPre;
result.strBlen = sizeof(kPre) - 1;
}
else {
const char *numstart = strpbrk(result.strB, "0123456789+-");
if (!numstart) {
result.strBlen = strlen(result.strB);
}
else {
result.strBlen = numstart - result.strB;
result.numC = strtol(numstart, &result.extraD, 10);
if (!*result.extraD)
result.extraD = nullptr;
}
}
}
if (dot) {
++dot;
if (!*dot)
dot = nullptr;
}
return dot;
}
// compare two null-terminated strings, which may be null pointers
static int32_t
ns_strcmp(const char *str1, const char *str2)
{
// any string is *before* no string
if (!str1)
return str2 != 0;
if (!str2)
return -1;
return strcmp(str1, str2);
}
// compare two length-specified string, which may be null pointers
static int32_t
ns_strnncmp(const char *str1, uint32_t len1, const char *str2, uint32_t len2)
{
// any string is *before* no string
if (!str1)
return str2 != 0;
if (!str2)
return -1;
for (; len1 && len2; --len1, --len2, ++str1, ++str2) {
if (*str1 < *str2)
return -1;
if (*str1 > *str2)
return 1;
}
if (len1 == 0)
return len2 == 0 ? 0 : -1;
return 1;
}
// compare two int32_t
static int32_t
ns_cmp(int32_t n1, int32_t n2)
{
if (n1 < n2)
return -1;
return n1 != n2;
}
/**
* Compares two VersionParts
*/
static int32_t
CompareVP(VersionPart &v1, VersionPart &v2)
{
int32_t r = ns_cmp(v1.numA, v2.numA);
if (r)
return r;
r = ns_strnncmp(v1.strB, v1.strBlen, v2.strB, v2.strBlen);
if (r)
return r;
r = ns_cmp(v1.numC, v2.numC);
if (r)
return r;
return ns_strcmp(v1.extraD, v2.extraD);
}
/* this is intentionally not static so that we don't end up making copies
* anywhere */
int32_t
NS_CompareVersions(const char *A, const char *B)
{
char *A2 = strdup(A);
if (!A2)
return 1;
char *B2 = strdup(B);
if (!B2) {
free(A2);
return 1;
}
int32_t result;
char *a = A2, *b = B2;
do {
VersionPart va, vb;
a = ParseVP(a, va);
b = ParseVP(b, vb);
result = CompareVP(va, vb);
if (result)
break;
} while (a || b);
free(A2);
free(B2);
return result;
}
static void
TriggerQuirks()
{
int mib[2];
mib[0] = CTL_KERN;
mib[1] = KERN_OSRELEASE;
// we won't support versions greater than 10.7.99
char release[sizeof("10.7.99")];
size_t len = sizeof(release);
// sysctl will return ENOMEM if the release string is longer than sizeof(release)
int ret = sysctl(mib, 2, release, &len, nullptr, 0);
// we only want to trigger this on OS X 10.6, on versions 10.6.8 or newer
// Darwin version 10 corresponds to OS X version 10.6, version 11 is 10.7
// http://en.wikipedia.org/wiki/Darwin_(operating_system)#Release_history
if (ret == 0 && NS_CompareVersions(release, "10.8.0") >= 0 && NS_CompareVersions(release, "11") < 0) {
CFBundleRef mainBundle = CFBundleGetMainBundle();
if (mainBundle) {
CFRetain(mainBundle);
CFStringRef bundleID = CFBundleGetIdentifier(mainBundle);
if (bundleID) {
CFRetain(bundleID);
CFMutableDictionaryRef dict = (CFMutableDictionaryRef)CFBundleGetInfoDictionary(mainBundle);
CFDictionarySetValue(dict, CFSTR("CFBundleIdentifier"), CFSTR("org.mozilla.firefox"));
// Trigger a load of the quirks table for org.mozilla.firefox.
// We use different function on 32/64bit because of how the APIs
// behave to force a call to GetBugsForOurBundleIDFromCoreservicesd.
#ifdef __i386__
ProcessSerialNumber psn;
::GetCurrentProcess(&psn);
#else
SInt32 major;
::Gestalt(gestaltSystemVersionMajor, &major);
#endif
// restore the original id
dict = (CFMutableDictionaryRef)CFBundleGetInfoDictionary(mainBundle);
CFDictionarySetValue(dict, CFSTR("CFBundleIdentifier"), bundleID);
CFRelease(bundleID);
}
CFRelease(mainBundle);
}
}
}
#endif //MacQuirks_h__