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Side by Side Diff: src/inspector/V8Regex.cpp

Issue 2300823002: Revert of [inspector] Initial import of v8_inspector. (Closed)
Patch Set: Created 4 years, 3 months ago
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1 // Copyright 2016 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "src/inspector/V8Regex.h"
6
7 #include "src/inspector/StringUtil.h"
8 #include "src/inspector/V8Compat.h"
9 #include "src/inspector/V8InspectorImpl.h"
10 #include "src/inspector/public/V8InspectorClient.h"
11
12 #include <limits.h>
13
14 namespace v8_inspector {
15
16 V8Regex::V8Regex(V8InspectorImpl* inspector, const String16& pattern, bool caseS ensitive, bool multiline)
17 : m_inspector(inspector)
18 {
19 v8::Isolate* isolate = m_inspector->isolate();
20 v8::HandleScope handleScope(isolate);
21 v8::Local<v8::Context> context = m_inspector->regexContext();
22 v8::Context::Scope contextScope(context);
23 v8::TryCatch tryCatch(isolate);
24
25 unsigned flags = v8::RegExp::kNone;
26 if (!caseSensitive)
27 flags |= v8::RegExp::kIgnoreCase;
28 if (multiline)
29 flags |= v8::RegExp::kMultiline;
30
31 v8::Local<v8::RegExp> regex;
32 if (v8::RegExp::New(context, toV8String(isolate, pattern), static_cast<v8::R egExp::Flags>(flags)).ToLocal(&regex))
33 m_regex.Reset(isolate, regex);
34 else if (tryCatch.HasCaught())
35 m_errorMessage = toProtocolString(tryCatch.Message()->Get());
36 else
37 m_errorMessage = "Internal error";
38 }
39
40 int V8Regex::match(const String16& string, int startFrom, int* matchLength) cons t
41 {
42 if (matchLength)
43 *matchLength = 0;
44
45 if (m_regex.IsEmpty() || string.isEmpty())
46 return -1;
47
48 // v8 strings are limited to int.
49 if (string.length() > INT_MAX)
50 return -1;
51
52 v8::Isolate* isolate = m_inspector->isolate();
53 v8::HandleScope handleScope(isolate);
54 v8::Local<v8::Context> context = m_inspector->regexContext();
55 v8::MicrotasksScope microtasks(isolate, v8::MicrotasksScope::kDoNotRunMicrot asks);
56 v8::TryCatch tryCatch(isolate);
57
58 v8::Local<v8::RegExp> regex = m_regex.Get(isolate);
59 v8::Local<v8::Value> exec;
60 if (!regex->Get(context, toV8StringInternalized(isolate, "exec")).ToLocal(&e xec))
61 return -1;
62 v8::Local<v8::Value> argv[] = { toV8String(isolate, string.substring(startFr om)) };
63 v8::Local<v8::Value> returnValue;
64 if (!exec.As<v8::Function>()->Call(context, regex, V8_INSPECTOR_ARRAY_LENGTH (argv), argv).ToLocal(&returnValue))
65 return -1;
66
67 // RegExp#exec returns null if there's no match, otherwise it returns an
68 // Array of strings with the first being the whole match string and others
69 // being subgroups. The Array also has some random properties tacked on like
70 // "index" which is the offset of the match.
71 //
72 // https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Obje cts/RegExp/exec
73
74 DCHECK(!returnValue.IsEmpty());
75 if (!returnValue->IsArray())
76 return -1;
77
78 v8::Local<v8::Array> result = returnValue.As<v8::Array>();
79 v8::Local<v8::Value> matchOffset;
80 if (!result->Get(context, toV8StringInternalized(isolate, "index")).ToLocal( &matchOffset))
81 return -1;
82 if (matchLength) {
83 v8::Local<v8::Value> match;
84 if (!result->Get(context, 0).ToLocal(&match))
85 return -1;
86 *matchLength = match.As<v8::String>()->Length();
87 }
88
89 return matchOffset.As<v8::Int32>()->Value() + startFrom;
90 }
91
92 } // namespace v8_inspector
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