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-rw-r--r--deps/v8/src/runtime/runtime-uri.cc309
1 files changed, 309 insertions, 0 deletions
diff --git a/deps/v8/src/runtime/runtime-uri.cc b/deps/v8/src/runtime/runtime-uri.cc
new file mode 100644
index 0000000000..10e21be05f
--- /dev/null
+++ b/deps/v8/src/runtime/runtime-uri.cc
@@ -0,0 +1,309 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/v8.h"
+
+#include "src/arguments.h"
+#include "src/conversions.h"
+#include "src/runtime/runtime.h"
+#include "src/runtime/runtime-utils.h"
+#include "src/string-search.h"
+#include "src/utils.h"
+
+
+namespace v8 {
+namespace internal {
+
+template <typename Char>
+static INLINE(Vector<const Char> GetCharVector(Handle<String> string));
+
+
+template <>
+Vector<const uint8_t> GetCharVector(Handle<String> string) {
+ String::FlatContent flat = string->GetFlatContent();
+ DCHECK(flat.IsOneByte());
+ return flat.ToOneByteVector();
+}
+
+
+template <>
+Vector<const uc16> GetCharVector(Handle<String> string) {
+ String::FlatContent flat = string->GetFlatContent();
+ DCHECK(flat.IsTwoByte());
+ return flat.ToUC16Vector();
+}
+
+
+class URIUnescape : public AllStatic {
+ public:
+ template <typename Char>
+ MUST_USE_RESULT static MaybeHandle<String> Unescape(Isolate* isolate,
+ Handle<String> source);
+
+ private:
+ static const signed char kHexValue['g'];
+
+ template <typename Char>
+ MUST_USE_RESULT static MaybeHandle<String> UnescapeSlow(Isolate* isolate,
+ Handle<String> string,
+ int start_index);
+
+ static INLINE(int TwoDigitHex(uint16_t character1, uint16_t character2));
+
+ template <typename Char>
+ static INLINE(int UnescapeChar(Vector<const Char> vector, int i, int length,
+ int* step));
+};
+
+
+const signed char URIUnescape::kHexValue[] = {
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -0, 1, 2, 3, 4, 5,
+ 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15};
+
+
+template <typename Char>
+MaybeHandle<String> URIUnescape::Unescape(Isolate* isolate,
+ Handle<String> source) {
+ int index;
+ {
+ DisallowHeapAllocation no_allocation;
+ StringSearch<uint8_t, Char> search(isolate, STATIC_CHAR_VECTOR("%"));
+ index = search.Search(GetCharVector<Char>(source), 0);
+ if (index < 0) return source;
+ }
+ return UnescapeSlow<Char>(isolate, source, index);
+}
+
+
+template <typename Char>
+MaybeHandle<String> URIUnescape::UnescapeSlow(Isolate* isolate,
+ Handle<String> string,
+ int start_index) {
+ bool one_byte = true;
+ int length = string->length();
+
+ int unescaped_length = 0;
+ {
+ DisallowHeapAllocation no_allocation;
+ Vector<const Char> vector = GetCharVector<Char>(string);
+ for (int i = start_index; i < length; unescaped_length++) {
+ int step;
+ if (UnescapeChar(vector, i, length, &step) >
+ String::kMaxOneByteCharCode) {
+ one_byte = false;
+ }
+ i += step;
+ }
+ }
+
+ DCHECK(start_index < length);
+ Handle<String> first_part =
+ isolate->factory()->NewProperSubString(string, 0, start_index);
+
+ int dest_position = 0;
+ Handle<String> second_part;
+ DCHECK(unescaped_length <= String::kMaxLength);
+ if (one_byte) {
+ Handle<SeqOneByteString> dest = isolate->factory()
+ ->NewRawOneByteString(unescaped_length)
+ .ToHandleChecked();
+ DisallowHeapAllocation no_allocation;
+ Vector<const Char> vector = GetCharVector<Char>(string);
+ for (int i = start_index; i < length; dest_position++) {
+ int step;
+ dest->SeqOneByteStringSet(dest_position,
+ UnescapeChar(vector, i, length, &step));
+ i += step;
+ }
+ second_part = dest;
+ } else {
+ Handle<SeqTwoByteString> dest = isolate->factory()
+ ->NewRawTwoByteString(unescaped_length)
+ .ToHandleChecked();
+ DisallowHeapAllocation no_allocation;
+ Vector<const Char> vector = GetCharVector<Char>(string);
+ for (int i = start_index; i < length; dest_position++) {
+ int step;
+ dest->SeqTwoByteStringSet(dest_position,
+ UnescapeChar(vector, i, length, &step));
+ i += step;
+ }
+ second_part = dest;
+ }
+ return isolate->factory()->NewConsString(first_part, second_part);
+}
+
+
+int URIUnescape::TwoDigitHex(uint16_t character1, uint16_t character2) {
+ if (character1 > 'f') return -1;
+ int hi = kHexValue[character1];
+ if (hi == -1) return -1;
+ if (character2 > 'f') return -1;
+ int lo = kHexValue[character2];
+ if (lo == -1) return -1;
+ return (hi << 4) + lo;
+}
+
+
+template <typename Char>
+int URIUnescape::UnescapeChar(Vector<const Char> vector, int i, int length,
+ int* step) {
+ uint16_t character = vector[i];
+ int32_t hi = 0;
+ int32_t lo = 0;
+ if (character == '%' && i <= length - 6 && vector[i + 1] == 'u' &&
+ (hi = TwoDigitHex(vector[i + 2], vector[i + 3])) != -1 &&
+ (lo = TwoDigitHex(vector[i + 4], vector[i + 5])) != -1) {
+ *step = 6;
+ return (hi << 8) + lo;
+ } else if (character == '%' && i <= length - 3 &&
+ (lo = TwoDigitHex(vector[i + 1], vector[i + 2])) != -1) {
+ *step = 3;
+ return lo;
+ } else {
+ *step = 1;
+ return character;
+ }
+}
+
+
+class URIEscape : public AllStatic {
+ public:
+ template <typename Char>
+ MUST_USE_RESULT static MaybeHandle<String> Escape(Isolate* isolate,
+ Handle<String> string);
+
+ private:
+ static const char kHexChars[17];
+ static const char kNotEscaped[256];
+
+ static bool IsNotEscaped(uint16_t c) { return kNotEscaped[c] != 0; }
+};
+
+
+const char URIEscape::kHexChars[] = "0123456789ABCDEF";
+
+
+// kNotEscaped is generated by the following:
+//
+// #!/bin/perl
+// for (my $i = 0; $i < 256; $i++) {
+// print "\n" if $i % 16 == 0;
+// my $c = chr($i);
+// my $escaped = 1;
+// $escaped = 0 if $c =~ m#[A-Za-z0-9@*_+./-]#;
+// print $escaped ? "0, " : "1, ";
+// }
+
+const char URIEscape::kNotEscaped[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1,
+ 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
+
+template <typename Char>
+MaybeHandle<String> URIEscape::Escape(Isolate* isolate, Handle<String> string) {
+ DCHECK(string->IsFlat());
+ int escaped_length = 0;
+ int length = string->length();
+
+ {
+ DisallowHeapAllocation no_allocation;
+ Vector<const Char> vector = GetCharVector<Char>(string);
+ for (int i = 0; i < length; i++) {
+ uint16_t c = vector[i];
+ if (c >= 256) {
+ escaped_length += 6;
+ } else if (IsNotEscaped(c)) {
+ escaped_length++;
+ } else {
+ escaped_length += 3;
+ }
+
+ // We don't allow strings that are longer than a maximal length.
+ DCHECK(String::kMaxLength < 0x7fffffff - 6); // Cannot overflow.
+ if (escaped_length > String::kMaxLength) break; // Provoke exception.
+ }
+ }
+
+ // No length change implies no change. Return original string if no change.
+ if (escaped_length == length) return string;
+
+ Handle<SeqOneByteString> dest;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, dest, isolate->factory()->NewRawOneByteString(escaped_length),
+ String);
+ int dest_position = 0;
+
+ {
+ DisallowHeapAllocation no_allocation;
+ Vector<const Char> vector = GetCharVector<Char>(string);
+ for (int i = 0; i < length; i++) {
+ uint16_t c = vector[i];
+ if (c >= 256) {
+ dest->SeqOneByteStringSet(dest_position, '%');
+ dest->SeqOneByteStringSet(dest_position + 1, 'u');
+ dest->SeqOneByteStringSet(dest_position + 2, kHexChars[c >> 12]);
+ dest->SeqOneByteStringSet(dest_position + 3, kHexChars[(c >> 8) & 0xf]);
+ dest->SeqOneByteStringSet(dest_position + 4, kHexChars[(c >> 4) & 0xf]);
+ dest->SeqOneByteStringSet(dest_position + 5, kHexChars[c & 0xf]);
+ dest_position += 6;
+ } else if (IsNotEscaped(c)) {
+ dest->SeqOneByteStringSet(dest_position, c);
+ dest_position++;
+ } else {
+ dest->SeqOneByteStringSet(dest_position, '%');
+ dest->SeqOneByteStringSet(dest_position + 1, kHexChars[c >> 4]);
+ dest->SeqOneByteStringSet(dest_position + 2, kHexChars[c & 0xf]);
+ dest_position += 3;
+ }
+ }
+ }
+
+ return dest;
+}
+
+
+RUNTIME_FUNCTION(Runtime_URIEscape) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
+ Handle<String> string = String::Flatten(source);
+ DCHECK(string->IsFlat());
+ Handle<String> result;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, result, string->IsOneByteRepresentationUnderneath()
+ ? URIEscape::Escape<uint8_t>(isolate, source)
+ : URIEscape::Escape<uc16>(isolate, source));
+ return *result;
+}
+
+
+RUNTIME_FUNCTION(Runtime_URIUnescape) {
+ HandleScope scope(isolate);
+ DCHECK(args.length() == 1);
+ CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
+ Handle<String> string = String::Flatten(source);
+ DCHECK(string->IsFlat());
+ Handle<String> result;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, result, string->IsOneByteRepresentationUnderneath()
+ ? URIUnescape::Unescape<uint8_t>(isolate, source)
+ : URIUnescape::Unescape<uc16>(isolate, source));
+ return *result;
+}
+}
+} // namespace v8::internal
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