[PATCH] D84282: [flang] Handle leading zeroes after decimal in REAL formatted input

[Peter Klausler via Phabricator via llvm-commits]

klausler created this revision.
klausler added reviewers: sscalpone, PeteSteinfeld, schweitz.
klausler added a project: Flang.
Herald added a reviewer: jdoerfert.
Herald added a reviewer: DavidTruby.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

Leading zero digits after the decimal mark were being dropped.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D84282

Files:
  flang/runtime/edit-input.cpp
  flang/unittests/Runtime/hello.cpp


Index: flang/unittests/Runtime/hello.cpp
===================================================================
--- flang/unittests/Runtime/hello.cpp
+++ flang/unittests/Runtime/hello.cpp
@@ -420,11 +420,16 @@
   realInTest("(F18.0)", "                 0", 0x0);
   realInTest("(F18.0)", "                  ", 0x0);
   realInTest("(F18.0)", "                -0", 0x8000000000000000);
+  realInTest("(F18.0)", "                01", 0x3ff0000000000000);
   realInTest("(F18.0)", "                 1", 0x3ff0000000000000);
   realInTest("(F18.0)", "              125.", 0x405f400000000000);
   realInTest("(F18.0)", "              12.5", 0x4029000000000000);
   realInTest("(F18.0)", "              1.25", 0x3ff4000000000000);
+  realInTest("(F18.0)", "             01.25", 0x3ff4000000000000);
   realInTest("(F18.0)", "              .125", 0x3fc0000000000000);
+  realInTest("(F18.0)", "             0.125", 0x3fc0000000000000);
+  realInTest("(F18.0)", "             .0625", 0x3fb0000000000000);
+  realInTest("(F18.0)", "            0.0625", 0x3fb0000000000000);
   realInTest("(F18.0)", "               125", 0x405f400000000000);
   realInTest("(F18.1)", "               125", 0x4029000000000000);
   realInTest("(F18.2)", "               125", 0x3ff4000000000000);
Index: flang/runtime/edit-input.cpp
===================================================================
--- flang/runtime/edit-input.cpp
+++ flang/runtime/edit-input.cpp
@@ -177,8 +177,8 @@
           continue;
         }
       }
-      if (ch == '0' && got == start) {
-        // omit leading zeroes
+      if (ch == '0' && got == start && !decimalPoint) {
+        // omit leading zeroes before the decimal
       } else if (ch >= '0' && ch <= '9') {
         if (got < bufferSize) {
           buffer[got++] = ch;


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