1 files changed, 144 insertions, 0 deletions
diff --git a/skia/ext/SkFontHost_fontconfig_ipc.cpp b/skia/ext/SkFontHost_fontconfig_ipc.cpp
new file mode 100644
index 0000000..1705aed
--- /dev/null
+++ b/skia/ext/SkFontHost_fontconfig_ipc.cpp
@@ -0,0 +1,144 @@
+/* libs/graphics/ports/SkFontHost_fontconfig_direct.cpp
+**
+** Copyright 2009, Google Inc.
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+// http://code.google.com/p/chromium/wiki/LinuxSandboxIPC
+
+#include "SkFontHost_fontconfig_ipc.h"
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+
+#include "base/pickle.h"
+#include "base/unix_domain_socket_posix.h"
+
+FontConfigIPC::FontConfigIPC(int fd)
+    : fd_(fd) {
+}
+
+FontConfigIPC::~FontConfigIPC() {
+    close(fd_);
+}
+
+static ssize_t SyncIPC(int fd, uint8_t* reply, unsigned reply_len, int* result_fd,
+                       const Pickle& request) {
+    int fds[2];
+    if (socketpair(AF_UNIX, SOCK_DGRAM, 0, fds) == -1)
+        return false;
+
+    std::vector<int> fd_vector;
+    fd_vector.push_back(fds[1]);
+    if (!base::SendMsg(fd, request.data(), request.size(), fd_vector)) {
+      close(fds[0]);
+      close(fds[1]);
+      return -1;
+    }
+    close(fds[1]);
+
+    fd_vector.clear();
+    const ssize_t r = base::RecvMsg(fds[0], reply, reply_len, &fd_vector);
+    close(fds[0]);
+    if (r == -1)
+      return -1;
+
+    if ((fd_vector.size() > 0 && result_fd == NULL) || fd_vector.size() > 1) {
+      for (std::vector<int>::const_iterator
+           i = fd_vector.begin(); i != fd_vector.end(); ++i) {
+        close(*i);
+      }
+
+      return -1;
+    }
+
+    if (result_fd) {
+      if (fd_vector.size() == 0) {
+        *result_fd = -1;
+      } else {
+        *result_fd = fd_vector[0];
+      }
+    }
+
+    return r;
+}
+
+bool FontConfigIPC::Match(std::string* result_family,
+                          unsigned* result_fileid,
+                          bool fileid_valid, unsigned fileid,
+                          const std::string& family, int is_bold,
+                          int is_italic) {
+    Pickle request;
+    request.WriteInt(METHOD_MATCH);
+    request.WriteBool(fileid_valid);
+    if (fileid_valid)
+      request.WriteUInt32(fileid);
+    request.WriteBool(is_bold);
+    request.WriteBool(is_italic);
+    request.WriteString(family);
+
+    uint8_t reply_buf[512];
+    const ssize_t r = SyncIPC(fd_, reply_buf, sizeof(reply_buf), NULL, request);
+    if (r == -1)
+      return false;
+
+    Pickle reply(reinterpret_cast<char*>(reply_buf), r);
+    void* iter = NULL;
+    bool result;
+    if (!reply.ReadBool(&iter, &result))
+      return false;
+    if (!result)
+      return false;
+
+    uint32_t reply_fileid;
+    std::string reply_family;
+    if (!reply.ReadUInt32(&iter, &reply_fileid) ||
+        !reply.ReadString(&iter, &reply_family)) {
+      return false;
+    }
+
+    *result_fileid = reply_fileid;
+    if (result_family)
+      *result_family = reply_family;
+
+    return true;
+}
+
+int FontConfigIPC::Open(unsigned fileid) {
+    Pickle request;
+    request.WriteInt(METHOD_OPEN);
+    request.WriteUInt32(fileid);
+
+    int result_fd = -1;
+    uint8_t reply_buf[256];
+    const ssize_t r = SyncIPC(fd_, reply_buf, sizeof(reply_buf), &result_fd, request);
+
+    if (r == -1)
+      return -1;
+
+    Pickle reply(reinterpret_cast<char*>(reply_buf), r);
+    bool result;
+    void* iter = NULL;
+    if (!reply.ReadBool(&iter, &result) ||
+        !result) {
+      if (result_fd)
+        close(result_fd);
+      return -1;
+    }
+
+    return result_fd;
+}