Fix the code that causes warnings

These are the left or newly added code which causes compilation
warnings of "signed and unsigned comparison". Need to fix them
before I re-enable the warning flag.

BUG=pdfium:29

Review-Url: https://codereview.chromium.org/1986533002

2 files changed, 7 insertions, 9 deletions

diff --git a/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.cpp b/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.cpp
index 1c20b7c8a1..8f54353d4a 100644
--- a/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.cpp
+++ b/xfa/fxbarcode/datamatrix/BC_ErrorCorrection.cpp
@@ -172,14 +172,12 @@ CFX_WideString CBC_ErrorCorrection::createECCBlock(CFX_WideString codewords,
                                                    int32_t len,
                                                    int32_t numECWords,
                                                    int32_t& e) {
-  int32_t table = -1;
-  for (int32_t i = 0; i < sizeof(FACTOR_SETS) / sizeof(int32_t); i++) {
-    if (FACTOR_SETS[i] == numECWords) {
-      table = i;
-      break;
-    }
-  }
-  if (table < 0) {
+  static const size_t kFactorTableNum = sizeof(FACTOR_SETS) / sizeof(int32_t);
+  size_t table = 0;
+  while (table < kFactorTableNum && FACTOR_SETS[table] != numECWords)
+    table++;
+
+  if (table >= kFactorTableNum) {
     e = BCExceptionIllegalArgument;
     return (FX_WCHAR*)"";
   }
diff --git a/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.cpp b/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.cpp
index 15f288be63..19672c1b71 100644
--- a/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.cpp
+++ b/xfa/fxbarcode/datamatrix/BC_HighLevelEncoder.cpp
@@ -158,7 +158,7 @@ int32_t CBC_HighLevelEncoder::lookAheadTest(CFX_WideString msg,
   int32_t charsProcessed = 0;
   while (TRUE) {
     if ((startpos + charsProcessed) == msg.GetLength()) {
-      uint32_t min = std::numeric_limits<int32_t>::max();
+      int32_t min = std::numeric_limits<int32_t>::max();
       CFX_ByteArray mins;
       mins.SetSize(6);
       CFX_Int32Array intCharCounts;