AAPT2: Rename to match new style

Use Google3 naming style to match new
projects' and open source google projects' style.

Preferred to do this in a massive CL so as to avoid
style inconsistencies that plague legacy code bases.
This is a relatively NEW code base, may as well keep
it up to date.

Test: name/style refactor - existing tests pass
Change-Id: Ie80ecb78d46ec53efdfca2336bb57d96cbb7fb87
diff --git a/tools/aapt2/util/Files.cpp b/tools/aapt2/util/Files.cpp
index 4cba921..f034607 100644
--- a/tools/aapt2/util/Files.cpp
+++ b/tools/aapt2/util/Files.cpp
@@ -15,15 +15,20 @@
  */
 
 #include "util/Files.h"
-#include "util/Util.h"
+
+#include <dirent.h>
+#include <sys/stat.h>
 
 #include <algorithm>
-#include <android-base/file.h>
 #include <cerrno>
 #include <cstdio>
-#include <dirent.h>
 #include <string>
-#include <sys/stat.h>
+
+#include "android-base/errors.h"
+#include "android-base/file.h"
+#include "android-base/logging.h"
+
+#include "util/Util.h"
 
 #ifdef _WIN32
 // Windows includes.
@@ -33,244 +38,230 @@
 namespace aapt {
 namespace file {
 
-FileType getFileType(const StringPiece& path) {
-    struct stat sb;
-    if (stat(path.data(), &sb) < 0) {
-        if (errno == ENOENT || errno == ENOTDIR) {
-            return FileType::kNonexistant;
-        }
-        return FileType::kUnknown;
+FileType GetFileType(const StringPiece& path) {
+  struct stat sb;
+  if (stat(path.data(), &sb) < 0) {
+    if (errno == ENOENT || errno == ENOTDIR) {
+      return FileType::kNonexistant;
     }
+    return FileType::kUnknown;
+  }
 
-    if (S_ISREG(sb.st_mode)) {
-        return FileType::kRegular;
-    } else if (S_ISDIR(sb.st_mode)) {
-        return FileType::kDirectory;
-    } else if (S_ISCHR(sb.st_mode)) {
-        return FileType::kCharDev;
-    } else if (S_ISBLK(sb.st_mode)) {
-        return FileType::kBlockDev;
-    } else if (S_ISFIFO(sb.st_mode)) {
-        return FileType::kFifo;
+  if (S_ISREG(sb.st_mode)) {
+    return FileType::kRegular;
+  } else if (S_ISDIR(sb.st_mode)) {
+    return FileType::kDirectory;
+  } else if (S_ISCHR(sb.st_mode)) {
+    return FileType::kCharDev;
+  } else if (S_ISBLK(sb.st_mode)) {
+    return FileType::kBlockDev;
+  } else if (S_ISFIFO(sb.st_mode)) {
+    return FileType::kFifo;
 #if defined(S_ISLNK)
-    } else if (S_ISLNK(sb.st_mode)) {
-        return FileType::kSymlink;
+  } else if (S_ISLNK(sb.st_mode)) {
+    return FileType::kSymlink;
 #endif
 #if defined(S_ISSOCK)
-    } else if (S_ISSOCK(sb.st_mode)) {
-        return FileType::kSocket;
+  } else if (S_ISSOCK(sb.st_mode)) {
+    return FileType::kSocket;
 #endif
-    } else {
-        return FileType::kUnknown;
-    }
+  } else {
+    return FileType::kUnknown;
+  }
 }
 
-std::vector<std::string> listFiles(const StringPiece& root, std::string* outError) {
-    DIR* dir = opendir(root.data());
-    if (dir == nullptr) {
-        if (outError) {
-            std::stringstream errorStr;
-            errorStr << "unable to open file: " << strerror(errno);
-            *outError = errorStr.str();
-        }
-        return {};
-    }
-
-    std::vector<std::string> files;
-    dirent* entry;
-    while ((entry = readdir(dir))) {
-        files.emplace_back(entry->d_name);
-    }
-
-    closedir(dir);
-    return files;
-}
-
-inline static int mkdirImpl(const StringPiece& path) {
+inline static int MkdirImpl(const StringPiece& path) {
 #ifdef _WIN32
-    return _mkdir(path.toString().c_str());
+  return _mkdir(path.ToString().c_str());
 #else
-    return mkdir(path.toString().c_str(), S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP);
+  return mkdir(path.ToString().c_str(),
+               S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP);
 #endif
 }
 
 bool mkdirs(const StringPiece& path) {
-    const char* start = path.begin();
-    const char* end = path.end();
-    for (const char* current = start; current != end; ++current) {
-        if (*current == sDirSep && current != start) {
-            StringPiece parentPath(start, current - start);
-            int result = mkdirImpl(parentPath);
-            if (result < 0 && errno != EEXIST) {
-                return false;
-            }
-        }
-    }
-    return mkdirImpl(path) == 0 || errno == EEXIST;
-}
-
-StringPiece getStem(const StringPiece& path) {
-    const char* start = path.begin();
-    const char* end = path.end();
-    for (const char* current = end - 1; current != start - 1; --current) {
-        if (*current == sDirSep) {
-            return StringPiece(start, current - start);
-        }
-    }
-    return {};
-}
-
-StringPiece getFilename(const StringPiece& path) {
-    const char* end = path.end();
-    const char* lastDirSep = path.begin();
-    for (const char* c = path.begin(); c != end; ++c) {
-        if (*c == sDirSep) {
-            lastDirSep = c + 1;
-        }
-    }
-    return StringPiece(lastDirSep, end - lastDirSep);
-}
-
-StringPiece getExtension(const StringPiece& path) {
-    StringPiece filename = getFilename(path);
-    const char* const end = filename.end();
-    const char* c = std::find(filename.begin(), end, '.');
-    if (c != end) {
-        return StringPiece(c, end - c);
-    }
-    return {};
-}
-
-void appendPath(std::string* base, StringPiece part) {
-    assert(base);
-    const bool baseHasTrailingSep = (!base->empty() && *(base->end() - 1) == sDirSep);
-    const bool partHasLeadingSep = (!part.empty() && *(part.begin()) == sDirSep);
-    if (baseHasTrailingSep && partHasLeadingSep) {
-        // Remove the part's leading sep
-        part = part.substr(1, part.size() - 1);
-    } else if (!baseHasTrailingSep && !partHasLeadingSep) {
-        // None of the pieces has a separator.
-        *base += sDirSep;
-    }
-    base->append(part.data(), part.size());
-}
-
-std::string packageToPath(const StringPiece& package) {
-    std::string outPath;
-    for (StringPiece part : util::tokenize(package, '.')) {
-        appendPath(&outPath, part);
-    }
-    return outPath;
-}
-
-Maybe<android::FileMap> mmapPath(const StringPiece& path, std::string* outError) {
-    std::unique_ptr<FILE, decltype(fclose)*> f = { fopen(path.data(), "rb"), fclose };
-    if (!f) {
-        if (outError) *outError = strerror(errno);
-        return {};
-    }
-
-    int fd = fileno(f.get());
-
-    struct stat fileStats = {};
-    if (fstat(fd, &fileStats) != 0) {
-        if (outError) *outError = strerror(errno);
-        return {};
-    }
-
-    android::FileMap fileMap;
-    if (fileStats.st_size == 0) {
-        // mmap doesn't like a length of 0. Instead we return an empty FileMap.
-        return std::move(fileMap);
-    }
-
-    if (!fileMap.create(path.data(), fd, 0, fileStats.st_size, true)) {
-        if (outError) *outError = strerror(errno);
-        return {};
-    }
-    return std::move(fileMap);
-}
-
-bool appendArgsFromFile(const StringPiece& path, std::vector<std::string>* outArgList,
-                        std::string* outError) {
-    std::string contents;
-    if (!android::base::ReadFileToString(path.toString(), &contents)) {
-        if (outError) *outError = "failed to read argument-list file";
+  const char* start = path.begin();
+  const char* end = path.end();
+  for (const char* current = start; current != end; ++current) {
+    if (*current == sDirSep && current != start) {
+      StringPiece parent_path(start, current - start);
+      int result = MkdirImpl(parent_path);
+      if (result < 0 && errno != EEXIST) {
         return false;
+      }
     }
-
-    for (StringPiece line : util::tokenize(contents, ' ')) {
-        line = util::trimWhitespace(line);
-        if (!line.empty()) {
-            outArgList->push_back(line.toString());
-        }
-    }
-    return true;
+  }
+  return MkdirImpl(path) == 0 || errno == EEXIST;
 }
 
-bool FileFilter::setPattern(const StringPiece& pattern) {
-    mPatternTokens = util::splitAndLowercase(pattern, ':');
-    return true;
+StringPiece GetStem(const StringPiece& path) {
+  const char* start = path.begin();
+  const char* end = path.end();
+  for (const char* current = end - 1; current != start - 1; --current) {
+    if (*current == sDirSep) {
+      return StringPiece(start, current - start);
+    }
+  }
+  return {};
+}
+
+StringPiece GetFilename(const StringPiece& path) {
+  const char* end = path.end();
+  const char* last_dir_sep = path.begin();
+  for (const char* c = path.begin(); c != end; ++c) {
+    if (*c == sDirSep) {
+      last_dir_sep = c + 1;
+    }
+  }
+  return StringPiece(last_dir_sep, end - last_dir_sep);
+}
+
+StringPiece GetExtension(const StringPiece& path) {
+  StringPiece filename = GetFilename(path);
+  const char* const end = filename.end();
+  const char* c = std::find(filename.begin(), end, '.');
+  if (c != end) {
+    return StringPiece(c, end - c);
+  }
+  return {};
+}
+
+void AppendPath(std::string* base, StringPiece part) {
+  CHECK(base != nullptr);
+  const bool base_has_trailing_sep =
+      (!base->empty() && *(base->end() - 1) == sDirSep);
+  const bool part_has_leading_sep =
+      (!part.empty() && *(part.begin()) == sDirSep);
+  if (base_has_trailing_sep && part_has_leading_sep) {
+    // Remove the part's leading sep
+    part = part.substr(1, part.size() - 1);
+  } else if (!base_has_trailing_sep && !part_has_leading_sep) {
+    // None of the pieces has a separator.
+    *base += sDirSep;
+  }
+  base->append(part.data(), part.size());
+}
+
+std::string PackageToPath(const StringPiece& package) {
+  std::string out_path;
+  for (StringPiece part : util::Tokenize(package, '.')) {
+    AppendPath(&out_path, part);
+  }
+  return out_path;
+}
+
+Maybe<android::FileMap> MmapPath(const StringPiece& path,
+                                 std::string* out_error) {
+  std::unique_ptr<FILE, decltype(fclose)*> f = {fopen(path.data(), "rb"),
+                                                fclose};
+  if (!f) {
+    if (out_error) *out_error = android::base::SystemErrorCodeToString(errno);
+    return {};
+  }
+
+  int fd = fileno(f.get());
+
+  struct stat filestats = {};
+  if (fstat(fd, &filestats) != 0) {
+    if (out_error) *out_error = android::base::SystemErrorCodeToString(errno);
+    return {};
+  }
+
+  android::FileMap filemap;
+  if (filestats.st_size == 0) {
+    // mmap doesn't like a length of 0. Instead we return an empty FileMap.
+    return std::move(filemap);
+  }
+
+  if (!filemap.create(path.data(), fd, 0, filestats.st_size, true)) {
+    if (out_error) *out_error = android::base::SystemErrorCodeToString(errno);
+    return {};
+  }
+  return std::move(filemap);
+}
+
+bool AppendArgsFromFile(const StringPiece& path,
+                        std::vector<std::string>* out_arglist,
+                        std::string* out_error) {
+  std::string contents;
+  if (!android::base::ReadFileToString(path.ToString(), &contents)) {
+    if (out_error) *out_error = "failed to read argument-list file";
+    return false;
+  }
+
+  for (StringPiece line : util::Tokenize(contents, ' ')) {
+    line = util::TrimWhitespace(line);
+    if (!line.empty()) {
+      out_arglist->push_back(line.ToString());
+    }
+  }
+  return true;
+}
+
+bool FileFilter::SetPattern(const StringPiece& pattern) {
+  pattern_tokens_ = util::SplitAndLowercase(pattern, ':');
+  return true;
 }
 
 bool FileFilter::operator()(const std::string& filename, FileType type) const {
-    if (filename == "." || filename == "..") {
-        return false;
+  if (filename == "." || filename == "..") {
+    return false;
+  }
+
+  const char kDir[] = "dir";
+  const char kFile[] = "file";
+  const size_t filename_len = filename.length();
+  bool chatty = true;
+  for (const std::string& token : pattern_tokens_) {
+    const char* token_str = token.c_str();
+    if (*token_str == '!') {
+      chatty = false;
+      token_str++;
     }
 
-    const char kDir[] = "dir";
-    const char kFile[] = "file";
-    const size_t filenameLen = filename.length();
-    bool chatty = true;
-    for (const std::string& token : mPatternTokens) {
-        const char* tokenStr = token.c_str();
-        if (*tokenStr == '!') {
-            chatty = false;
-            tokenStr++;
-        }
-
-        if (strncasecmp(tokenStr, kDir, sizeof(kDir)) == 0) {
-            if (type != FileType::kDirectory) {
-                continue;
-            }
-            tokenStr += sizeof(kDir);
-        }
-
-        if (strncasecmp(tokenStr, kFile, sizeof(kFile)) == 0) {
-            if (type != FileType::kRegular) {
-                continue;
-            }
-            tokenStr += sizeof(kFile);
-        }
-
-        bool ignore = false;
-        size_t n = strlen(tokenStr);
-        if (*tokenStr == '*') {
-            // Math suffix.
-            tokenStr++;
-            n--;
-            if (n <= filenameLen) {
-                ignore = strncasecmp(tokenStr, filename.c_str() + filenameLen - n, n) == 0;
-            }
-        } else if (n > 1 && tokenStr[n - 1] == '*') {
-            // Match prefix.
-            ignore = strncasecmp(tokenStr, filename.c_str(), n - 1) == 0;
-        } else {
-            ignore = strcasecmp(tokenStr, filename.c_str()) == 0;
-        }
-
-        if (ignore) {
-            if (chatty) {
-                mDiag->warn(DiagMessage() << "skipping "
-                            << (type == FileType::kDirectory ? "dir '" : "file '")
-                            << filename << "' due to ignore pattern '"
-                            << token << "'");
-            }
-            return false;
-        }
+    if (strncasecmp(token_str, kDir, sizeof(kDir)) == 0) {
+      if (type != FileType::kDirectory) {
+        continue;
+      }
+      token_str += sizeof(kDir);
     }
-    return true;
+
+    if (strncasecmp(token_str, kFile, sizeof(kFile)) == 0) {
+      if (type != FileType::kRegular) {
+        continue;
+      }
+      token_str += sizeof(kFile);
+    }
+
+    bool ignore = false;
+    size_t n = strlen(token_str);
+    if (*token_str == '*') {
+      // Math suffix.
+      token_str++;
+      n--;
+      if (n <= filename_len) {
+        ignore =
+            strncasecmp(token_str, filename.c_str() + filename_len - n, n) == 0;
+      }
+    } else if (n > 1 && token_str[n - 1] == '*') {
+      // Match prefix.
+      ignore = strncasecmp(token_str, filename.c_str(), n - 1) == 0;
+    } else {
+      ignore = strcasecmp(token_str, filename.c_str()) == 0;
+    }
+
+    if (ignore) {
+      if (chatty) {
+        diag_->Warn(DiagMessage()
+                    << "skipping "
+                    << (type == FileType::kDirectory ? "dir '" : "file '")
+                    << filename << "' due to ignore pattern '" << token << "'");
+      }
+      return false;
+    }
+  }
+  return true;
 }
 
-} // namespace file
-} // namespace aapt
+}  // namespace file
+}  // namespace aapt