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Refactor Heap::SymbolMapForString to use switch/case.

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Review URL: http://codereview.chromium.org/8683001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10055 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
yangguo@chromium.org 2011-11-23 13:31:26 +00:00
parent 2055f4195e
commit c2514c8c8e
1 changed files with 15 additions and 33 deletions
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42
src/heap.cc
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@ -3975,40 +3975,22 @@ Map* Heap::SymbolMapForString(String* string) {
if (InNewSpace(string)) return NULL;
// Find the corresponding symbol map for strings.
Map* map = string->map();
if (map == ascii_string_map()) {
return ascii_symbol_map();
}
if (map == string_map()) {
return symbol_map();
}
if (map == cons_string_map()) {
return cons_symbol_map();
}
if (map == cons_ascii_string_map()) {
return cons_ascii_symbol_map();
}
if (map == external_string_map()) {
return external_symbol_map();
}
if (map == external_ascii_string_map()) {
return external_ascii_symbol_map();
}
if (map == external_string_with_ascii_data_map()) {
switch (string->map()->instance_type()) {
case STRING_TYPE: return symbol_map();
case ASCII_STRING_TYPE: return ascii_symbol_map();
case CONS_STRING_TYPE: return cons_symbol_map();
case CONS_ASCII_STRING_TYPE: return cons_ascii_symbol_map();
case EXTERNAL_STRING_TYPE: return external_symbol_map();
case EXTERNAL_ASCII_STRING_TYPE: return external_ascii_symbol_map();
case EXTERNAL_STRING_WITH_ASCII_DATA_TYPE:
return external_symbol_with_ascii_data_map();
}
if (map == short_external_string_map()) {
return short_external_symbol_map();
}
if (map == short_external_ascii_string_map()) {
case SHORT_EXTERNAL_STRING_TYPE: return short_external_symbol_map();
case SHORT_EXTERNAL_ASCII_STRING_TYPE:
return short_external_ascii_symbol_map();
}
if (map == short_external_string_with_ascii_data_map()) {
case SHORT_EXTERNAL_STRING_WITH_ASCII_DATA_TYPE:
return short_external_symbol_with_ascii_data_map();
default: return NULL; // No match found.
}
// No match found.
return NULL;
}