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authorTom Sepez <tsepez@chromium.org>2015-05-06 15:58:32 -0700
committerTom Sepez <tsepez@chromium.org>2015-05-06 15:58:32 -0700
commit9ea57a43faeab85a9a431e987ff4c3ba670083a0 (patch)
treeb6d62fc00b6b5999c03ce06738ea286f3cdc9854 /core/include/fxcrt/fx_system.h
parentad2a822ce5c320c61510ffdc309f766ab1056ef5 (diff)
downloadpdfium-9ea57a43faeab85a9a431e987ff4c3ba670083a0.tar.xz
Remove FX_STRSIZE casts, use safe conversions
BUG=pdfium:153 R=thestig@chromium.org Review URL: https://codereview.chromium.org/1124043003
Diffstat (limited to 'core/include/fxcrt/fx_system.h')
-rw-r--r--core/include/fxcrt/fx_system.h26
1 files changed, 24 insertions, 2 deletions
diff --git a/core/include/fxcrt/fx_system.h b/core/include/fxcrt/fx_system.h
index ce86d5ad5c..50d3344a89 100644
--- a/core/include/fxcrt/fx_system.h
+++ b/core/include/fxcrt/fx_system.h
@@ -14,6 +14,7 @@
#define _FXM_PLATFORM_LINUX_ 2
#define _FXM_PLATFORM_APPLE_ 3
#define _FXM_PLATFORM_ANDROID_ 4
+
#ifndef _FX_OS_
#if defined(__ANDROID__)
#define _FX_OS_ _FX_ANDROID_
@@ -29,9 +30,11 @@
#define _FXM_PLATFORM_ _FXM_PLATFORM_APPLE_
#endif
#endif
+
#if !defined(_FX_OS_) || _FX_OS_ == 0
#error Sorry, can not figure out what OS you are targeting to. Please specify _FX_OS_ macro.
#endif
+
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
#define _CRT_SECURE_NO_WARNINGS
#include <sal.h>
@@ -46,6 +49,7 @@
#define _FX_WORDSIZE_ _FX_W32_
#endif
#endif
+
#include <stddef.h>
#include <stdarg.h>
#include <setjmp.h>
@@ -54,6 +58,7 @@
#include <string.h>
#include <assert.h>
#include <wchar.h>
+
#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
#include <libkern/OSAtomic.h>
#if _FX_OS_ == _FX_MACOSX_
@@ -63,6 +68,7 @@
#include <CoreGraphics/CoreGraphics.h>
#endif
#endif
+
#ifdef __cplusplus
extern "C" {
#endif
@@ -110,6 +116,12 @@ typedef wchar_t* FX_LPWSTR;
typedef wchar_t const* FX_LPCWSTR;
typedef FX_DWORD FX_UINT32;
typedef FX_UINT64 FX_QWORD;
+
+// PDFium string sizes are limited to 2^31-1, and the value is signed to
+// allow -1 as a placeholder for "unknown".
+// TODO(palmer): it should be a |size_t|, or at least unsigned.
+typedef int FX_STRSIZE;
+
#if defined(DEBUG) && !defined(_DEBUG)
#define _DEBUG
#endif
@@ -152,7 +164,6 @@ void FXSYS_vsnprintf(char *str, size_t size, const char* fmt, va_list ap);
#define FXSYS_sprintf DO_NOT_USE_SPRINTF_DIE_DIE_DIE
#define FXSYS_vsprintf DO_NOT_USE_VSPRINTF_DIE_DIE_DIE
#define FXSYS_strchr strchr
-#define FXSYS_strlen strlen
#define FXSYS_strncmp strncmp
#define FXSYS_strcmp strcmp
#define FXSYS_strcpy strcpy
@@ -169,6 +180,7 @@ void FXSYS_vsnprintf(char *str, size_t size, const char* fmt, va_list ap);
#define FXSYS_fwrite fwrite
#define FXSYS_fprintf fprintf
#define FXSYS_fflush fflush
+
#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
#ifdef _NATIVE_WCHAR_T_DEFINED
#define FXSYS_wfopen(f, m) _wfopen((const wchar_t*)(f), (const wchar_t*)(m))
@@ -179,7 +191,17 @@ void FXSYS_vsnprintf(char *str, size_t size, const char* fmt, va_list ap);
FXSYS_FILE* FXSYS_wfopen(FX_LPCWSTR filename, FX_LPCWSTR mode);
#endif
-#define FXSYS_wcslen wcslen
+#ifdef __cplusplus
+} // extern "C"
+#include "../../../third_party/base/numerics/safe_conversions.h"
+#define FXSYS_strlen(ptr) pdfium::base::checked_cast<FX_STRSIZE>(strlen(ptr))
+#define FXSYS_wcslen(ptr) pdfium::base::checked_cast<FX_STRSIZE>(wcslen(ptr))
+extern "C" {
+#else
+#define FXSYS_strlen(ptr) ((FX_STRSIZE)strlen(ptr))
+#define FXSYS_wcslen(ptr) ((FX_STRSIZE)wcslen(ptr))
+#endif
+
#define FXSYS_wcscmp wcscmp
#define FXSYS_wcschr wcschr
#define FXSYS_wcsstr wcsstr