From 0f2cf531f705d370321843e5ba9135b2ebdb5d19 Mon Sep 17 00:00:00 2001
From: Vincent Ambo <tazjin@google.com>
Date: Sun, 17 May 2020 16:31:57 +0100
Subject: style(3p/nix): Reformat project in Google C++ style

Reformatted with:

    fd . -e hh -e cc | xargs clang-format -i
---
 third_party/nix/src/libutil/serialise.cc | 466 ++++++++++++++-----------------
 1 file changed, 210 insertions(+), 256 deletions(-)

(limited to 'third_party/nix/src/libutil/serialise.cc')

diff --git a/third_party/nix/src/libutil/serialise.cc b/third_party/nix/src/libutil/serialise.cc
index 8201549fd7d0..6d7cb1d8d156 100644
--- a/third_party/nix/src/libutil/serialise.cc
+++ b/third_party/nix/src/libutil/serialise.cc
@@ -1,323 +1,277 @@
 #include "serialise.hh"
-#include "util.hh"
-
-#include <cstring>
+#include <boost/coroutine2/coroutine.hpp>
 #include <cerrno>
+#include <cstring>
 #include <memory>
-
-#include <boost/coroutine2/coroutine.hpp>
-
+#include "util.hh"
 
 namespace nix {
 
+void BufferedSink::operator()(const unsigned char* data, size_t len) {
+  if (!buffer) buffer = decltype(buffer)(new unsigned char[bufSize]);
 
-void BufferedSink::operator () (const unsigned char * data, size_t len)
-{
-    if (!buffer) buffer = decltype(buffer)(new unsigned char[bufSize]);
-
-    while (len) {
-        /* Optimisation: bypass the buffer if the data exceeds the
-           buffer size. */
-        if (bufPos + len >= bufSize) {
-            flush();
-            write(data, len);
-            break;
-        }
-        /* Otherwise, copy the bytes to the buffer.  Flush the buffer
-           when it's full. */
-        size_t n = bufPos + len > bufSize ? bufSize - bufPos : len;
-        memcpy(buffer.get() + bufPos, data, n);
-        data += n; bufPos += n; len -= n;
-        if (bufPos == bufSize) flush();
+  while (len) {
+    /* Optimisation: bypass the buffer if the data exceeds the
+       buffer size. */
+    if (bufPos + len >= bufSize) {
+      flush();
+      write(data, len);
+      break;
     }
+    /* Otherwise, copy the bytes to the buffer.  Flush the buffer
+       when it's full. */
+    size_t n = bufPos + len > bufSize ? bufSize - bufPos : len;
+    memcpy(buffer.get() + bufPos, data, n);
+    data += n;
+    bufPos += n;
+    len -= n;
+    if (bufPos == bufSize) flush();
+  }
 }
 
-
-void BufferedSink::flush()
-{
-    if (bufPos == 0) return;
-    size_t n = bufPos;
-    bufPos = 0; // don't trigger the assert() in ~BufferedSink()
-    write(buffer.get(), n);
+void BufferedSink::flush() {
+  if (bufPos == 0) return;
+  size_t n = bufPos;
+  bufPos = 0;  // don't trigger the assert() in ~BufferedSink()
+  write(buffer.get(), n);
 }
 
-
-FdSink::~FdSink()
-{
-    try { flush(); } catch (...) { ignoreException(); }
+FdSink::~FdSink() {
+  try {
+    flush();
+  } catch (...) {
+    ignoreException();
+  }
 }
 
-
 size_t threshold = 256 * 1024 * 1024;
 
-static void warnLargeDump()
-{
-    printError("warning: dumping very large path (> 256 MiB); this may run out of memory");
+static void warnLargeDump() {
+  printError(
+      "warning: dumping very large path (> 256 MiB); this may run out of "
+      "memory");
 }
 
-
-void FdSink::write(const unsigned char * data, size_t len)
-{
-    written += len;
-    static bool warned = false;
-    if (warn && !warned) {
-        if (written > threshold) {
-            warnLargeDump();
-            warned = true;
-        }
-    }
-    try {
-        writeFull(fd, data, len);
-    } catch (SysError & e) {
-        _good = false;
-        throw;
+void FdSink::write(const unsigned char* data, size_t len) {
+  written += len;
+  static bool warned = false;
+  if (warn && !warned) {
+    if (written > threshold) {
+      warnLargeDump();
+      warned = true;
     }
+  }
+  try {
+    writeFull(fd, data, len);
+  } catch (SysError& e) {
+    _good = false;
+    throw;
+  }
 }
 
+bool FdSink::good() { return _good; }
 
-bool FdSink::good()
-{
-    return _good;
+void Source::operator()(unsigned char* data, size_t len) {
+  while (len) {
+    size_t n = read(data, len);
+    data += n;
+    len -= n;
+  }
 }
 
-
-void Source::operator () (unsigned char * data, size_t len)
-{
-    while (len) {
-        size_t n = read(data, len);
-        data += n; len -= n;
-    }
-}
-
-
-std::string Source::drain()
-{
-    std::string s;
-    std::vector<unsigned char> buf(8192);
-    while (true) {
-        size_t n;
-        try {
-            n = read(buf.data(), buf.size());
-            s.append((char *) buf.data(), n);
-        } catch (EndOfFile &) {
-            break;
-        }
+std::string Source::drain() {
+  std::string s;
+  std::vector<unsigned char> buf(8192);
+  while (true) {
+    size_t n;
+    try {
+      n = read(buf.data(), buf.size());
+      s.append((char*)buf.data(), n);
+    } catch (EndOfFile&) {
+      break;
     }
-    return s;
-}
-
-
-size_t BufferedSource::read(unsigned char * data, size_t len)
-{
-    if (!buffer) buffer = decltype(buffer)(new unsigned char[bufSize]);
-
-    if (!bufPosIn) bufPosIn = readUnbuffered(buffer.get(), bufSize);
-
-    /* Copy out the data in the buffer. */
-    size_t n = len > bufPosIn - bufPosOut ? bufPosIn - bufPosOut : len;
-    memcpy(data, buffer.get() + bufPosOut, n);
-    bufPosOut += n;
-    if (bufPosIn == bufPosOut) bufPosIn = bufPosOut = 0;
-    return n;
+  }
+  return s;
 }
 
+size_t BufferedSource::read(unsigned char* data, size_t len) {
+  if (!buffer) buffer = decltype(buffer)(new unsigned char[bufSize]);
 
-bool BufferedSource::hasData()
-{
-    return bufPosOut < bufPosIn;
-}
-
+  if (!bufPosIn) bufPosIn = readUnbuffered(buffer.get(), bufSize);
 
-size_t FdSource::readUnbuffered(unsigned char * data, size_t len)
-{
-    ssize_t n;
-    do {
-        checkInterrupt();
-        n = ::read(fd, (char *) data, len);
-    } while (n == -1 && errno == EINTR);
-    if (n == -1) { _good = false; throw SysError("reading from file"); }
-    if (n == 0) { _good = false; throw EndOfFile("unexpected end-of-file"); }
-    read += n;
-    return n;
+  /* Copy out the data in the buffer. */
+  size_t n = len > bufPosIn - bufPosOut ? bufPosIn - bufPosOut : len;
+  memcpy(data, buffer.get() + bufPosOut, n);
+  bufPosOut += n;
+  if (bufPosIn == bufPosOut) bufPosIn = bufPosOut = 0;
+  return n;
 }
 
-
-bool FdSource::good()
-{
-    return _good;
+bool BufferedSource::hasData() { return bufPosOut < bufPosIn; }
+
+size_t FdSource::readUnbuffered(unsigned char* data, size_t len) {
+  ssize_t n;
+  do {
+    checkInterrupt();
+    n = ::read(fd, (char*)data, len);
+  } while (n == -1 && errno == EINTR);
+  if (n == -1) {
+    _good = false;
+    throw SysError("reading from file");
+  }
+  if (n == 0) {
+    _good = false;
+    throw EndOfFile("unexpected end-of-file");
+  }
+  read += n;
+  return n;
 }
 
+bool FdSource::good() { return _good; }
 
-size_t StringSource::read(unsigned char * data, size_t len)
-{
-    if (pos == s.size()) throw EndOfFile("end of string reached");
-    size_t n = s.copy((char *) data, len, pos);
-    pos += n;
-    return n;
+size_t StringSource::read(unsigned char* data, size_t len) {
+  if (pos == s.size()) throw EndOfFile("end of string reached");
+  size_t n = s.copy((char*)data, len, pos);
+  pos += n;
+  return n;
 }
 
-
 #if BOOST_VERSION >= 106300 && BOOST_VERSION < 106600
 #error Coroutines are broken in this version of Boost!
 #endif
 
-std::unique_ptr<Source> sinkToSource(
-    std::function<void(Sink &)> fun,
-    std::function<void()> eof)
-{
-    struct SinkToSource : Source
-    {
-        typedef boost::coroutines2::coroutine<std::string> coro_t;
-
-        std::function<void(Sink &)> fun;
-        std::function<void()> eof;
-        std::optional<coro_t::pull_type> coro;
-        bool started = false;
-
-        SinkToSource(std::function<void(Sink &)> fun, std::function<void()> eof)
-            : fun(fun), eof(eof)
-        {
-        }
-
-        std::string cur;
-        size_t pos = 0;
-
-        size_t read(unsigned char * data, size_t len) override
-        {
-            if (!coro)
-                coro = coro_t::pull_type([&](coro_t::push_type & yield) {
-                    LambdaSink sink([&](const unsigned char * data, size_t len) {
-                            if (len) yield(std::string((const char *) data, len));
-                        });
-                    fun(sink);
-                });
-
-            if (!*coro) { eof(); abort(); }
-
-            if (pos == cur.size()) {
-                if (!cur.empty()) (*coro)();
-                cur = coro->get();
-                pos = 0;
-            }
-
-            auto n = std::min(cur.size() - pos, len);
-            memcpy(data, (unsigned char *) cur.data() + pos, n);
-            pos += n;
-
-            return n;
-        }
-    };
-
-    return std::make_unique<SinkToSource>(fun, eof);
-}
-
-
-void writePadding(size_t len, Sink & sink)
-{
-    if (len % 8) {
-        unsigned char zero[8];
-        memset(zero, 0, sizeof(zero));
-        sink(zero, 8 - (len % 8));
+std::unique_ptr<Source> sinkToSource(std::function<void(Sink&)> fun,
+                                     std::function<void()> eof) {
+  struct SinkToSource : Source {
+    typedef boost::coroutines2::coroutine<std::string> coro_t;
+
+    std::function<void(Sink&)> fun;
+    std::function<void()> eof;
+    std::optional<coro_t::pull_type> coro;
+    bool started = false;
+
+    SinkToSource(std::function<void(Sink&)> fun, std::function<void()> eof)
+        : fun(fun), eof(eof) {}
+
+    std::string cur;
+    size_t pos = 0;
+
+    size_t read(unsigned char* data, size_t len) override {
+      if (!coro)
+        coro = coro_t::pull_type([&](coro_t::push_type& yield) {
+          LambdaSink sink([&](const unsigned char* data, size_t len) {
+            if (len) yield(std::string((const char*)data, len));
+          });
+          fun(sink);
+        });
+
+      if (!*coro) {
+        eof();
+        abort();
+      }
+
+      if (pos == cur.size()) {
+        if (!cur.empty()) (*coro)();
+        cur = coro->get();
+        pos = 0;
+      }
+
+      auto n = std::min(cur.size() - pos, len);
+      memcpy(data, (unsigned char*)cur.data() + pos, n);
+      pos += n;
+
+      return n;
     }
-}
-
+  };
 
-void writeString(const unsigned char * buf, size_t len, Sink & sink)
-{
-    sink << len;
-    sink(buf, len);
-    writePadding(len, sink);
+  return std::make_unique<SinkToSource>(fun, eof);
 }
 
-
-Sink & operator << (Sink & sink, const string & s)
-{
-    writeString((const unsigned char *) s.data(), s.size(), sink);
-    return sink;
+void writePadding(size_t len, Sink& sink) {
+  if (len % 8) {
+    unsigned char zero[8];
+    memset(zero, 0, sizeof(zero));
+    sink(zero, 8 - (len % 8));
+  }
 }
 
-
-template<class T> void writeStrings(const T & ss, Sink & sink)
-{
-    sink << ss.size();
-    for (auto & i : ss)
-        sink << i;
+void writeString(const unsigned char* buf, size_t len, Sink& sink) {
+  sink << len;
+  sink(buf, len);
+  writePadding(len, sink);
 }
 
-Sink & operator << (Sink & sink, const Strings & s)
-{
-    writeStrings(s, sink);
-    return sink;
+Sink& operator<<(Sink& sink, const string& s) {
+  writeString((const unsigned char*)s.data(), s.size(), sink);
+  return sink;
 }
 
-Sink & operator << (Sink & sink, const StringSet & s)
-{
-    writeStrings(s, sink);
-    return sink;
+template <class T>
+void writeStrings(const T& ss, Sink& sink) {
+  sink << ss.size();
+  for (auto& i : ss) sink << i;
 }
 
-
-void readPadding(size_t len, Source & source)
-{
-    if (len % 8) {
-        unsigned char zero[8];
-        size_t n = 8 - (len % 8);
-        source(zero, n);
-        for (unsigned int i = 0; i < n; i++)
-            if (zero[i]) throw SerialisationError("non-zero padding");
-    }
+Sink& operator<<(Sink& sink, const Strings& s) {
+  writeStrings(s, sink);
+  return sink;
 }
 
-
-size_t readString(unsigned char * buf, size_t max, Source & source)
-{
-    auto len = readNum<size_t>(source);
-    if (len > max) throw SerialisationError("string is too long");
-    source(buf, len);
-    readPadding(len, source);
-    return len;
+Sink& operator<<(Sink& sink, const StringSet& s) {
+  writeStrings(s, sink);
+  return sink;
 }
 
-
-string readString(Source & source, size_t max)
-{
-    auto len = readNum<size_t>(source);
-    if (len > max) throw SerialisationError("string is too long");
-    std::string res(len, 0);
-    source((unsigned char*) res.data(), len);
-    readPadding(len, source);
-    return res;
+void readPadding(size_t len, Source& source) {
+  if (len % 8) {
+    unsigned char zero[8];
+    size_t n = 8 - (len % 8);
+    source(zero, n);
+    for (unsigned int i = 0; i < n; i++)
+      if (zero[i]) throw SerialisationError("non-zero padding");
+  }
 }
 
-Source & operator >> (Source & in, string & s)
-{
-    s = readString(in);
-    return in;
+size_t readString(unsigned char* buf, size_t max, Source& source) {
+  auto len = readNum<size_t>(source);
+  if (len > max) throw SerialisationError("string is too long");
+  source(buf, len);
+  readPadding(len, source);
+  return len;
 }
 
-
-template<class T> T readStrings(Source & source)
-{
-    auto count = readNum<size_t>(source);
-    T ss;
-    while (count--)
-        ss.insert(ss.end(), readString(source));
-    return ss;
+string readString(Source& source, size_t max) {
+  auto len = readNum<size_t>(source);
+  if (len > max) throw SerialisationError("string is too long");
+  std::string res(len, 0);
+  source((unsigned char*)res.data(), len);
+  readPadding(len, source);
+  return res;
 }
 
-template Paths readStrings(Source & source);
-template PathSet readStrings(Source & source);
-
+Source& operator>>(Source& in, string& s) {
+  s = readString(in);
+  return in;
+}
 
-void StringSink::operator () (const unsigned char * data, size_t len)
-{
-    static bool warned = false;
-    if (!warned && s->size() > threshold) {
-        warnLargeDump();
-        warned = true;
-    }
-    s->append((const char *) data, len);
+template <class T>
+T readStrings(Source& source) {
+  auto count = readNum<size_t>(source);
+  T ss;
+  while (count--) ss.insert(ss.end(), readString(source));
+  return ss;
 }
 
+template Paths readStrings(Source& source);
+template PathSet readStrings(Source& source);
 
+void StringSink::operator()(const unsigned char* data, size_t len) {
+  static bool warned = false;
+  if (!warned && s->size() > threshold) {
+    warnLargeDump();
+    warned = true;
+  }
+  s->append((const char*)data, len);
 }
+
+}  // namespace nix
-- 
cgit 1.4.1