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Don't dereference an invalid pointer if string is empty.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46781 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2008-02-05 23:34:40 +00:00
parent a58891ff1e
commit 5c4fb22809
1 changed files with 4 additions and 4 deletions
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8
include/llvm/ADT/StringMap.h
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@ -273,7 +273,7 @@ public:
return find(Key, Key + strlen(Key));
}
iterator find(const std::string &Key) {
const char* key_start = &Key[0];
const char* key_start = (Key.empty() ? NULL : &Key[0]);
return find(key_start, key_start + Key.size());
}
@ -286,7 +286,7 @@ public:
return find(Key, Key + strlen(Key));
}
const_iterator find(const std::string &Key) const {
const char* key_start = &Key[0];
const char* key_start = (Key.empty() ? NULL : &Key[0]);
return find(key_start, key_start + Key.size());
}
@ -295,7 +295,7 @@ public:
return entry.getValue();
}
ValueTy& operator[](const std::string &Key) {
const char* key_start = &Key[0];
const char* key_start = (Key.empty() ? NULL : &Key[0]);
value_type& entry = GetOrCreateValue(key_start, key_start + Key.size());
return entry.getValue();
}
@ -307,7 +307,7 @@ public:
return count(Key, Key + strlen(Key));
}
size_type count(const std::string &Key) const {
const char* key_start = &Key[0];
const char* key_start = (Key.empty() ? NULL : &Key[0]);
return count(key_start, key_start + Key.size());
}