Update V8 to r6768 as required by WebKit r78450
Change-Id: Ib8868ff7147a76547a8d1d85f257ebe8546a3d3f
diff --git a/src/utils.cc b/src/utils.cc
index d0ec4ef..b466301 100644
--- a/src/utils.cc
+++ b/src/utils.cc
@@ -276,4 +276,96 @@
}
+MemoryMappedExternalResource::MemoryMappedExternalResource(const char* filename)
+ : filename_(NULL),
+ data_(NULL),
+ length_(0),
+ remove_file_on_cleanup_(false) {
+ Init(filename);
+}
+
+
+MemoryMappedExternalResource::
+ MemoryMappedExternalResource(const char* filename,
+ bool remove_file_on_cleanup)
+ : filename_(NULL),
+ data_(NULL),
+ length_(0),
+ remove_file_on_cleanup_(remove_file_on_cleanup) {
+ Init(filename);
+}
+
+
+MemoryMappedExternalResource::~MemoryMappedExternalResource() {
+ // Release the resources if we had successfully acquired them:
+ if (file_ != NULL) {
+ delete file_;
+ if (remove_file_on_cleanup_) {
+ OS::Remove(filename_);
+ }
+ DeleteArray<char>(filename_);
+ }
+}
+
+
+void MemoryMappedExternalResource::Init(const char* filename) {
+ file_ = OS::MemoryMappedFile::open(filename);
+ if (file_ != NULL) {
+ filename_ = StrDup(filename);
+ data_ = reinterpret_cast<char*>(file_->memory());
+ length_ = file_->size();
+ }
+}
+
+
+bool MemoryMappedExternalResource::EnsureIsAscii(bool abort_if_failed) const {
+ bool is_ascii = true;
+
+ int line_no = 1;
+ const char* start_of_line = data_;
+ const char* end = data_ + length_;
+ for (const char* p = data_; p < end; p++) {
+ char c = *p;
+ if ((c & 0x80) != 0) {
+ // Non-ascii detected:
+ is_ascii = false;
+
+ // Report the error and abort if appropriate:
+ if (abort_if_failed) {
+ int char_no = static_cast<int>(p - start_of_line) - 1;
+
+ ASSERT(filename_ != NULL);
+ PrintF("\n\n\n"
+ "Abort: Non-Ascii character 0x%.2x in file %s line %d char %d",
+ c, filename_, line_no, char_no);
+
+ // Allow for some context up to kNumberOfLeadingContextChars chars
+ // before the offending non-ascii char to help the user see where
+ // the offending char is.
+ const int kNumberOfLeadingContextChars = 10;
+ const char* err_context = p - kNumberOfLeadingContextChars;
+ if (err_context < data_) {
+ err_context = data_;
+ }
+ // Compute the length of the error context and print it.
+ int err_context_length = static_cast<int>(p - err_context);
+ if (err_context_length != 0) {
+ PrintF(" after \"%.*s\"", err_context_length, err_context);
+ }
+ PrintF(".\n\n\n");
+ OS::Abort();
+ }
+
+ break; // Non-ascii detected. No need to continue scanning.
+ }
+ if (c == '\n') {
+ start_of_line = p;
+ line_no++;
+ }
+ }
+
+ return is_ascii;
+}
+
+
} } // namespace v8::internal