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Issue 347002: Derive string size constants... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 11 years, 1 month ago
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1 // Copyright 2007-2009 the V8 project authors. All rights reserved. 1 // Copyright 2007-2009 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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6951 6951
6952 static void MorphAString(i::String* string, 6952 static void MorphAString(i::String* string,
6953 AsciiVectorResource* ascii_resource, 6953 AsciiVectorResource* ascii_resource,
6954 UC16VectorResource* uc16_resource) { 6954 UC16VectorResource* uc16_resource) {
6955 CHECK(i::StringShape(string).IsExternal()); 6955 CHECK(i::StringShape(string).IsExternal());
6956 if (string->IsAsciiRepresentation()) { 6956 if (string->IsAsciiRepresentation()) {
6957 // Check old map is not symbol or long. 6957 // Check old map is not symbol or long.
6958 CHECK(string->map() == i::Heap::short_external_ascii_string_map() || 6958 CHECK(string->map() == i::Heap::short_external_ascii_string_map() ||
6959 string->map() == i::Heap::medium_external_ascii_string_map()); 6959 string->map() == i::Heap::medium_external_ascii_string_map());
6960 // Morph external string to be TwoByte string. 6960 // Morph external string to be TwoByte string.
6961 if (string->length() <= i::String::kMaxShortStringSize) { 6961 if (string->length() <= i::String::kMaxShortSize) {
6962 string->set_map(i::Heap::short_external_string_map()); 6962 string->set_map(i::Heap::short_external_string_map());
6963 } else { 6963 } else {
6964 string->set_map(i::Heap::medium_external_string_map()); 6964 string->set_map(i::Heap::medium_external_string_map());
6965 } 6965 }
6966 i::ExternalTwoByteString* morphed = 6966 i::ExternalTwoByteString* morphed =
6967 i::ExternalTwoByteString::cast(string); 6967 i::ExternalTwoByteString::cast(string);
6968 morphed->set_resource(uc16_resource); 6968 morphed->set_resource(uc16_resource);
6969 } else { 6969 } else {
6970 // Check old map is not symbol or long. 6970 // Check old map is not symbol or long.
6971 CHECK(string->map() == i::Heap::short_external_string_map() || 6971 CHECK(string->map() == i::Heap::short_external_string_map() ||
6972 string->map() == i::Heap::medium_external_string_map()); 6972 string->map() == i::Heap::medium_external_string_map());
6973 // Morph external string to be ASCII string. 6973 // Morph external string to be ASCII string.
6974 if (string->length() <= i::String::kMaxShortStringSize) { 6974 if (string->length() <= i::String::kMaxShortSize) {
6975 string->set_map(i::Heap::short_external_ascii_string_map()); 6975 string->set_map(i::Heap::short_external_ascii_string_map());
6976 } else { 6976 } else {
6977 string->set_map(i::Heap::medium_external_ascii_string_map()); 6977 string->set_map(i::Heap::medium_external_ascii_string_map());
6978 } 6978 }
6979 i::ExternalAsciiString* morphed = 6979 i::ExternalAsciiString* morphed =
6980 i::ExternalAsciiString::cast(string); 6980 i::ExternalAsciiString::cast(string);
6981 morphed->set_resource(ascii_resource); 6981 morphed->set_resource(ascii_resource);
6982 } 6982 }
6983 } 6983 }
6984 6984
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8279 double stored_date = date->NumberValue(); 8279 double stored_date = date->NumberValue();
8280 if (!IsNaN(expected_stored_date)) { 8280 if (!IsNaN(expected_stored_date)) {
8281 CHECK_EQ(expected_stored_date, stored_date); 8281 CHECK_EQ(expected_stored_date, stored_date);
8282 } else { 8282 } else {
8283 uint64_t stored_bits = DoubleToBits(stored_date); 8283 uint64_t stored_bits = DoubleToBits(stored_date);
8284 // Check if quiet nan (bits 51..62 all set). 8284 // Check if quiet nan (bits 51..62 all set).
8285 CHECK_EQ(0xfff, static_cast<int>((stored_bits >> 51) & 0xfff)); 8285 CHECK_EQ(0xfff, static_cast<int>((stored_bits >> 51) & 0xfff));
8286 } 8286 }
8287 } 8287 }
8288 } 8288 }
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