1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/sandbox/chromium/base/strings/string_util_stripped.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,41 @@
1.4 +#include <wchar.h>
1.5 +
1.6 +namespace base {
1.7 +
1.8 +bool IsWprintfFormatPortable(const wchar_t* format) {
1.9 + for (const wchar_t* position = format; *position != '\0'; ++position) {
1.10 + if (*position == '%') {
1.11 + bool in_specification = true;
1.12 + bool modifier_l = false;
1.13 + while (in_specification) {
1.14 + // Eat up characters until reaching a known specifier.
1.15 + if (*++position == '\0') {
1.16 + // The format string ended in the middle of a specification. Call
1.17 + // it portable because no unportable specifications were found. The
1.18 + // string is equally broken on all platforms.
1.19 + return true;
1.20 + }
1.21 +
1.22 + if (*position == 'l') {
1.23 + // 'l' is the only thing that can save the 's' and 'c' specifiers.
1.24 + modifier_l = true;
1.25 + } else if (((*position == 's' || *position == 'c') && !modifier_l) ||
1.26 + *position == 'S' || *position == 'C' || *position == 'F' ||
1.27 + *position == 'D' || *position == 'O' || *position == 'U') {
1.28 + // Not portable.
1.29 + return false;
1.30 + }
1.31 +
1.32 + if (wcschr(L"diouxXeEfgGaAcspn%", *position)) {
1.33 + // Portable, keep scanning the rest of the format string.
1.34 + in_specification = false;
1.35 + }
1.36 + }
1.37 + }
1.38 + }
1.39 +
1.40 + return true;
1.41 +}
1.42 +
1.43 +} // namespace base
1.44 +
