Change file op |ssize_t|s to FileOperationResult

util/file/string_file.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // 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,
@@ skipping 15 matching lines @@
 
 namespace crashpad {
 
 StringFile::StringFile() : string_(), offset_(0) {
 }
 
 StringFile::~StringFile() {
 }
 
 void StringFile::SetString(const std::string& string) {
-  CHECK_LE(string.size(),
-           implicit_cast<size_t>(std::numeric_limits<ssize_t>::max()));
+  CHECK_LE(
+      string.size(),
+      implicit_cast<size_t>(std::numeric_limits<FileOperationResult>::max()));
   string_ = string;
   offset_ = 0;
 }
 
 void StringFile::Reset() {
   string_.clear();
   offset_ = 0;
 }
 
-ssize_t StringFile::Read(void* data, size_t size) {
+FileOperationResult StringFile::Read(void* data, size_t size) {
   DCHECK(offset_.IsValid());
 
   const size_t offset = offset_.ValueOrDie();
   if (offset >= string_.size()) {
     return 0;
   }
 
   const size_t nread = std::min(size, string_.size() - offset);
 
-  base::CheckedNumeric<ssize_t> new_offset = offset_;
+  base::CheckedNumeric<FileOperationResult> new_offset = offset_;
   new_offset += nread;
   if (!new_offset.IsValid()) {
     LOG(ERROR) << "Read(): file too large";
     return -1;
   }
 
   memcpy(data, &string_[offset], nread);
   offset_ = new_offset;
 
   return nread;
 }
 
 bool StringFile::Write(const void* data, size_t size) {
   DCHECK(offset_.IsValid());
 
   const size_t offset = offset_.ValueOrDie();
   if (offset > string_.size()) {
     string_.resize(offset);
   }
 
-  base::CheckedNumeric<ssize_t> new_offset = offset_;
+  base::CheckedNumeric<FileOperationResult> new_offset = offset_;
   new_offset += size;
   if (!new_offset.IsValid()) {
     LOG(ERROR) << "Write(): file too large";
     return false;
   }
 
   string_.replace(offset, size, reinterpret_cast<const char*>(data), size);
   offset_ = new_offset;
 
   return true;
 }
 
 bool StringFile::WriteIoVec(std::vector<WritableIoVec>* iovecs) {
   DCHECK(offset_.IsValid());
 
   if (iovecs->empty()) {
     LOG(ERROR) << "WriteIoVec(): no iovecs";
     return false;
   }
 
   // Avoid writing anything at all if it would cause an overflow.
-  base::CheckedNumeric<ssize_t> new_offset = offset_;
+  base::CheckedNumeric<FileOperationResult> new_offset = offset_;
   for (const WritableIoVec& iov : *iovecs) {
     new_offset += iov.iov_len;
     if (!new_offset.IsValid()) {
       LOG(ERROR) << "WriteIoVec(): file too large";
       return false;
     }
   }
 
   for (const WritableIoVec& iov : *iovecs) {
     if (!Write(iov.iov_base, iov.iov_len)) {
@@ skipping 52 matching lines @@
                << " invalid for size_t";
     return -1;
   }
 
   offset_ = new_offset_sizet;
 
   return offset_.ValueOrDie();
 }
 
 }  // namespace crashpad