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Export of internal Abseil changes.

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--
714347c156cfe01575c1830a92bc6dea3030065b by Emma Christie <emmachristie@google.com>:

Release absl::EqualsIgnoreCase

PiperOrigin-RevId: 216243900

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688106e2b9d2924799d597682690851cfba87818 by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 216208373

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53638e4da238b230af0e56dc31b9fb790e708f36 by Emma Christie <emmachristie@google.com>:

Update StartsWithIgnoreCase(), EndsWithIgnoreCase(), and EqualsIgnoreCase() headers to say that these functions only consider ASCII case inputs.

PiperOrigin-RevId: 215930962
GitOrigin-RevId: 714347c156cfe01575c1830a92bc6dea3030065b
Change-Id: I7fb3506234185b1a961e0110c1f8302ffe7228fa
This commit is contained in:
Abseil Team 2018-10-08 13:53:59 -07:00 • committed by CJ Johnson
parent e821380d69
commit 445998d7ac
7 changed files with 60 additions and 10 deletions
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7
absl/strings/match.cc
View file

@ -27,6 +27,13 @@ bool CaseEqual(absl::string_view piece1, absl::string_view piece2) {
}
} // namespace
bool EqualsIgnoreCase(absl::string_view piece1, absl::string_view piece2) {
return (piece1.size() == piece2.size() &&
0 == absl::strings_internal::memcasecmp(piece1.data(), piece2.data(),
piece1.size()));
// memcasecmp uses absl::ascii_tolower().
}
bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix) {
return (text.size() >= prefix.size()) &&
CaseEqual(text.substr(0, prefix.size()), prefix);

14
absl/strings/match.h
View file

@ -66,16 +66,22 @@ inline bool EndsWith(absl::string_view text, absl::string_view suffix) {
);
}
// EqualsIgnoreCase()
//
// Returns whether given ASCII strings `piece1` and `piece2` are equal, ignoring
// case in the comparison.
bool EqualsIgnoreCase(absl::string_view piece1, absl::string_view piece2);
// StartsWithIgnoreCase()
//
// Returns whether a given string `text` starts with `starts_with`, ignoring
// case in the comparison.
// Returns whether a given ASCII string `text` starts with `starts_with`,
// ignoring case in the comparison.
bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix);
// EndsWithIgnoreCase()
//
// Returns whether a given string `text` ends with `ends_with`, ignoring case
// in the comparison.
// Returns whether a given ASCII string `text` ends with `ends_with`, ignoring
// case in the comparison.
bool EndsWithIgnoreCase(absl::string_view text, absl::string_view suffix);
} // namespace absl

11
absl/strings/match_test.cc
View file

@ -80,6 +80,17 @@ TEST(MatchTest, ContainsNull) {
EXPECT_FALSE(absl::StrContains(cs, sv2));
}
TEST(MatchTest, EqualsIgnoreCase) {
std::string text = "the";
absl::string_view data(text);
EXPECT_TRUE(absl::EqualsIgnoreCase(data, "The"));
EXPECT_TRUE(absl::EqualsIgnoreCase(data, "THE"));
EXPECT_TRUE(absl::EqualsIgnoreCase(data, "the"));
EXPECT_FALSE(absl::EqualsIgnoreCase(data, "Quick"));
EXPECT_FALSE(absl::EqualsIgnoreCase(data, "then"));
}
TEST(MatchTest, StartsWithIgnoreCase) {
EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", "foo"));
EXPECT_TRUE(absl::StartsWithIgnoreCase("foo", "Fo"));