[libc++] Add configuration define for off_t functions
Create this define in __config and use it elsewhere, instead of checking
the operating system/library defines in other files. The aim is to
reduce the usage of _WIN32 outside __config. No functional change.
Differential Revision: https://reviews.llvm.org/D25741
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@285582 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/fstream b/include/fstream
index ce13b31..b8d18aa 100644
--- a/include/fstream
+++ b/include/fstream
@@ -813,7 +813,7 @@
default:
return pos_type(off_type(-1));
}
-#if defined(_WIN32) || defined(_NEWLIB_VERSION)
+#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
if (fseek(__file_, __width > 0 ? __width * __off : 0, __whence))
return pos_type(off_type(-1));
pos_type __r = ftell(__file_);
@@ -832,7 +832,7 @@
{
if (__file_ == 0 || sync())
return pos_type(off_type(-1));
-#if defined(_WIN32) || defined(_NEWLIB_VERSION)
+#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
if (fseek(__file_, __sp, SEEK_SET))
return pos_type(off_type(-1));
#else
@@ -896,7 +896,7 @@
}
}
}
-#if defined(_WIN32) || defined(_NEWLIB_VERSION)
+#if defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
if (fseek(__file_, -__c, SEEK_CUR))
return -1;
#else
