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authorTom Sepez <tsepez@chromium.org>2015-04-10 14:43:15 -0700
committerTom Sepez <tsepez@chromium.org>2015-04-10 14:43:15 -0700
commitd794018606dfdb62f87adf065c5ba48a4607d92b (patch)
tree00072b3481bd08aab6d20b749151e2e8efb68daa /core/include/fxcrt
parent1569728e9f5a60b033e530ee1d4cd99e467649da (diff)
downloadpdfium-d794018606dfdb62f87adf065c5ba48a4607d92b.tar.xz
Better fix for snprintf non-termination on windows.
Replaces https://codereview.chromium.org/1062983002/ BUG=469244 R=brucedawson@chromium.org Review URL: https://codereview.chromium.org/1077903002
Diffstat (limited to 'core/include/fxcrt')
-rw-r--r--core/include/fxcrt/fx_system.h18
1 files changed, 12 insertions, 6 deletions
diff --git a/core/include/fxcrt/fx_system.h b/core/include/fxcrt/fx_system.h
index a875da5f9c..d030bf70d6 100644
--- a/core/include/fxcrt/fx_system.h
+++ b/core/include/fxcrt/fx_system.h
@@ -34,8 +34,9 @@
#endif
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
#define _CRT_SECURE_NO_WARNINGS
+#include <sal.h>
#include <windows.h>
-#endif
+#endif // _FXM_PLATFORM_WINDOWS_
#define _FX_W32_ 1
#define _FX_W64_ 2
#ifndef _FX_WORDSIZE_
@@ -137,13 +138,18 @@ typedef FX_UINT64 FX_QWORD;
#define FX_MAX(a, b) (((a) > (b)) ? (a) : (b))
#define FX_MIN(a, b) (((a) < (b)) ? (a) : (b))
#define FX_PI 3.1415926535897932384626433832795f
-#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
-#define FXSYS_snprintf _snprintf
-#define FXSYS_vsnprintf _vsnprintf
+
+// NOTE: prevent use of the return value from snprintf() since some platforms
+// have different return values (e.g. windows _vsnprintf()), and provide
+// versions that always NUL-terminate.
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ && _MSC_VER < 1900
+void FXSYS_snprintf(char *str, size_t size, _Printf_format_string_ const char* fmt, ...);
+void FXSYS_vsnprintf(char *str, size_t size, const char* fmt, va_list ap);
#else
-#define FXSYS_snprintf snprintf
-#define FXSYS_vsnprintf vsnprintf
+#define FXSYS_snprintf (void) snprintf
+#define FXSYS_vsnprintf (void) vsnprintf
#endif
+
#define FXSYS_sprintf DO_NOT_USE_SPRINTF_DIE_DIE_DIE
#define FXSYS_vsprintf DO_NOT_USE_VSPRINTF_DIE_DIE_DIE
#define FXSYS_strchr strchr