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Commit af5eed10 authored by yangguo@chromium.org's avatar yangguo@chromium.org
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Handlify escape and unescape. 

R=mvstanton@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/12326015

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13702 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
parent 0832d08d
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Showing with 328 additions and 188 deletions
src/runtime.cc
View file @ af5eed10
......@@ -58,6 +58,7 @@
#include "smart-pointers.h"
#include "string-search.h"
#include "stub-cache.h"
#include "uri.h"
#include "v8threads.h"
#include "vm-state-inl.h"
......@@ -5126,201 +5127,30 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_TruncateString) {
}
// 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, ";
// }
static bool IsNotEscaped(uint16_t character) {
// Only for 8 bit characters, the rest are always escaped (in a different way)
ASSERT(character < 256);
static const char kNotEscaped[256] = {
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,
};
return kNotEscaped[character] != 0;
}
RUNTIME_FUNCTION(MaybeObject*, Runtime_URIEscape) {
const char hex_chars[] = "0123456789ABCDEF";
NoHandleAllocation ha;
ASSERT(args.length() == 1);
CONVERT_ARG_CHECKED(String, source, 0);
source->TryFlatten();
int escaped_length = 0;
int length = source->length();
{
Access<ConsStringIteratorOp> op(
isolate->runtime_state()->string_iterator());
StringCharacterStream stream(source, op.value());
while (stream.HasMore()) {
uint16_t character = stream.GetNext();
if (character >= 256) {
escaped_length += 6;
} else if (IsNotEscaped(character)) {
escaped_length++;
} else {
escaped_length += 3;
}
// We don't allow strings that are longer than a maximal length.
ASSERT(String::kMaxLength < 0x7fffffff - 6); // Cannot overflow.
if (escaped_length > String::kMaxLength) {
isolate->context()->mark_out_of_memory();
return Failure::OutOfMemoryException(0x12);
}
}
}
// No length change implies no change. Return original string if no change.
if (escaped_length == length) {
return source;
}
Object* o;
{ MaybeObject* maybe_o =
isolate->heap()->AllocateRawOneByteString(escaped_length);
if (!maybe_o->ToObject(&o)) return maybe_o;
}
String* destination = String::cast(o);
int dest_position = 0;
Access<ConsStringIteratorOp> op(
isolate->runtime_state()->string_iterator());
StringCharacterStream stream(source, op.value());
while (stream.HasMore()) {
uint16_t chr = stream.GetNext();
if (chr >= 256) {
destination->Set(dest_position, '%');
destination->Set(dest_position+1, 'u');
destination->Set(dest_position+2, hex_chars[chr >> 12]);
destination->Set(dest_position+3, hex_chars[(chr >> 8) & 0xf]);
destination->Set(dest_position+4, hex_chars[(chr >> 4) & 0xf]);
destination->Set(dest_position+5, hex_chars[chr & 0xf]);
dest_position += 6;
} else if (IsNotEscaped(chr)) {
destination->Set(dest_position, chr);
dest_position++;
} else {
destination->Set(dest_position, '%');
destination->Set(dest_position+1, hex_chars[chr >> 4]);
destination->Set(dest_position+2, hex_chars[chr & 0xf]);
dest_position += 3;
}
}
return destination;
}
static inline int TwoDigitHex(uint16_t character1, uint16_t character2) {
static const signed char kHexValue['g'] = {
-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 };
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;
}
static inline int Unescape(String* source,
int i,
int length,
int* step) {
uint16_t character = source->Get(i);
int32_t hi = 0;
int32_t lo = 0;
if (character == '%' &&
i <= length - 6 &&
source->Get(i + 1) == 'u' &&
(hi = TwoDigitHex(source->Get(i + 2),
source->Get(i + 3))) != -1 &&
(lo = TwoDigitHex(source->Get(i + 4),
source->Get(i + 5))) != -1) {
*step = 6;
return (hi << 8) + lo;
} else if (character == '%' &&
i <= length - 3 &&
(lo = TwoDigitHex(source->Get(i + 1),
source->Get(i + 2))) != -1) {
*step = 3;
return lo;
} else {
*step = 1;
return character;
}
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
Handle<String> string = FlattenGetString(source);
String::FlatContent content = string->GetFlatContent();
ASSERT(content.IsFlat());
Handle<String> result =
content.IsAscii() ? URIEscape::Escape<uint8_t>(isolate, source)
: URIEscape::Escape<uc16>(isolate, source);
if (result.is_null()) return Failure::OutOfMemoryException(0x12);
return *result;
}
RUNTIME_FUNCTION(MaybeObject*, Runtime_URIUnescape) {
NoHandleAllocation ha;
ASSERT(args.length() == 1);
CONVERT_ARG_CHECKED(String, source, 0);
source->TryFlatten();
bool one_byte = true;
int length = source->length();
int unescaped_length = 0;
for (int i = 0; i < length; unescaped_length++) {
int step;
if (Unescape(source, i, length, &step) > String::kMaxOneByteCharCode) {
one_byte = false;
}
i += step;
}
// No length change implies no change. Return original string if no change.
if (unescaped_length == length)
return source;
Object* o;
{ MaybeObject* maybe_o =
one_byte ?
isolate->heap()->AllocateRawOneByteString(unescaped_length) :
isolate->heap()->AllocateRawTwoByteString(unescaped_length);
if (!maybe_o->ToObject(&o)) return maybe_o;
}
String* destination = String::cast(o);
int dest_position = 0;
for (int i = 0; i < length; dest_position++) {
int step;
destination->Set(dest_position, Unescape(source, i, length, &step));
i += step;
}
return destination;
HandleScope scope(isolate);
CONVERT_ARG_HANDLE_CHECKED(String, source, 0);
Handle<String> string = FlattenGetString(source);
String::FlatContent content = string->GetFlatContent();
ASSERT(content.IsFlat());
return content.IsAscii() ? *URIUnescape::Unescape<uint8_t>(isolate, source)
: *URIUnescape::Unescape<uc16>(isolate, source);
}
......
src/uri.h 0 → 100644
View file @ af5eed10
This diff is collapsed.
tools/gyp/v8.gyp
View file @ af5eed10
......@@ -478,6 +478,7 @@
'../../src/unicode-inl.h',
'../../src/unicode.cc',
'../../src/unicode.h',
'../../src/uri.h',
'../../src/utils-inl.h',
'../../src/utils.cc',
'../../src/utils.h',
......
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