From 2c63d76205c1a7533f78b73255d0d7923ca225cc Mon Sep 17 00:00:00 2001
From: Robert Edmonds <edmonds@users.noreply.github.com>
Date: Sun, 2 Sep 2018 20:01:32 -0400
Subject: [PATCH] protoc-c: Fix -Wsign-compare diagnostics
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This commit fixes the following compiler diagnostics:

    ../protoc-c/c_helpers.cc: In function ‘void google::protobuf::compiler::c::PrintComment(google::protobuf::io::Printer*, std::__cxx11::string)’:
    ../protoc-c/c_helpers.cc:221:25: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::vector<std::__cxx11::basic_string<char> >::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
           for (int i = 0; i < comment_lines.size(); i++)
                           ~~^~~~~~~~~~~~~~~~~~~~~~
    ../protoc-c/c_helpers.cc: In function ‘std::set<std::__cxx11::basic_string<char> > google::protobuf::compiler::c::MakeKeywordsMap()’:
    ../protoc-c/c_helpers.cc:273:21: warning: comparison of integer expressions of different signedness: ‘int’ and ‘long unsigned int’ [-Wsign-compare]
       for (int i = 0; i < GOOGLE_ARRAYSIZE(kKeywordList); i++) {
                         ^
---
 protoc-c/c_helpers.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/protoc-c/c_helpers.cc b/protoc-c/c_helpers.cc
index 6fd0cd3..ea693c6 100644
--- a/protoc-c/c_helpers.cc
+++ b/protoc-c/c_helpers.cc
@@ -234,7 +234,7 @@ void PrintComment (io::Printer* printer, std::string comment)
       std::vector<std::string> comment_lines;
       SplitStringUsing (comment, "\r\n", &comment_lines);
       printer->Print ("/*\n");
-      for (int i = 0; i < comment_lines.size(); i++)
+      for (size_t i = 0; i < comment_lines.size(); i++)
       {
          if (!comment_lines[i].empty())
          {
@@ -286,7 +286,7 @@ const char* const kKeywordList[] = {
 
 std::set<std::string> MakeKeywordsMap() {
   std::set<std::string> result;
-  for (int i = 0; i < GOOGLE_ARRAYSIZE(kKeywordList); i++) {
+  for (size_t i = 0; i < GOOGLE_ARRAYSIZE(kKeywordList); i++) {
     result.insert(kKeywordList[i]);
   }
   return result;