Bug 1686831 - Import glibc printf test cases verbatim. r=mhoye

Differential Revision: https://phabricator.services.mozilla.com/D103131

.clang-format-ignore

@@ -172,6 +172,7 @@ modules/woff2/.*
 modules/xz-embedded/.*
 modules/zlib/.*
 mozglue/misc/decimal/.*
+mozglue/tests/glibc_printf_tests/.*
 netwerk/dns/nsIDNKitInterface.h
 netwerk/sctp/src/.*
 netwerk/srtp/src/.*

mozglue/tests/glibc_printf_tests/COPYING

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mozglue/tests/glibc_printf_tests/README.MOZILLA

+The files in this directory were copied from the stdio-common subdirectory
+in glibc (https://sourceware.org/git/glibc.git).

mozglue/tests/glibc_printf_tests/tllformat.c

+#include <stdio.h>
+#include <string.h>
+
+/* The original file was tiformat.c and it has been changed for long long tests\
+. */
+typedef struct
+{
+  int line;
+  long long int value;
+  const char *result;
+  const char *format_string;
+} sprint_int_type;
+
+sprint_int_type sprint_ints[] =
+{
+  {__LINE__, 0x00000000ULL,             "0", "%llx"},
+  {__LINE__, 0xffff00000000208bULL,     "ffff00000000208b", "%llx"},
+  {__LINE__, 0xffff00000000208bULL,     "18446462598732849291", "%llu"},
+  {__LINE__, 18446462598732849291ULL,   "ffff00000000208b", "%llx"},
+  {__LINE__, 18446462598732849291ULL,   "18446462598732849291", "%llu"},
+  {__LINE__, 18359476226655002763ULL,   "fec9f65b0000208b", "%llx"},
+  {__LINE__, 18359476226655002763ULL,   "18359476226655002763", "%llu"},
+
+  {0},
+};
+
+int
+main (void)
+{
+  int errcount = 0;
+  int testcount = 0;
+#define BSIZE 1024
+  char buffer[BSIZE];
+  sprint_int_type *iptr;
+  for (iptr = sprint_ints; iptr->line; iptr++)
+    {
+      sprintf (buffer, iptr->format_string, iptr->value);
+      if (strcmp (buffer, iptr->result) != 0)
+	{
+	  ++errcount;
+	  printf ("\
+Error in line %d using \"%s\".  Result is \"%s\"; should be: \"%s\".\n",
+		  iptr->line, iptr->format_string, buffer, iptr->result);
+        }
+      ++testcount;
+    }
+
+  if (errcount == 0)
+    {
+      printf ("Encountered no errors in %d tests.\n", testcount);
+      return 0;
+    }
+  else
+    {
+      printf ("Encountered %d errors in %d tests.\n",
+	      errcount, testcount);
+      return 1;
+    }
+}

tools/rewriting/ThirdPartyPaths.txt

@@ -134,6 +134,7 @@ modules/woff2/
 modules/xz-embedded/
 modules/zlib/
 mozglue/misc/decimal/
+mozglue/tests/glibc_printf_tests/
 netwerk/dns/nsIDNKitInterface.h
 netwerk/sctp/src/
 netwerk/srtp/src/