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authorGravatar Abseil Team <absl-team@google.com>2018-02-09 11:56:54 -0800
committerGravatar Daniel Katz <katzdm@google.com>2018-02-09 20:09:05 +0000
commit0dc82b9d55e1616c1745d05973d40c9901903cc9 (patch)
tree9eaf6866f9625dcaac4c07790fbc06ff3fc099cf /absl/strings/str_cat.h
parent4791df7d1ac966e6c7abdeffafa5030d718500df (diff)
Changes imported from Abseil "staging" branch:
- a0405e7870a80a9dbc6784b06795e7df5a8c90f5 Internal change by Daniel Katz <katzdm@google.com> - 2888fe17796d7afa45f4b6ca7eb8e88f52739c39 StrCat: Support zero-padding and space-padding for decima... by Jorg Brown <jorg@google.com> - feebc521195241783730df9700394f6585550ff2 Merge GitHub PR #91. by Derek Mauro <dmauro@google.com> - e8164335efefb7335f407c17a16fce2ba4f24e3e This changes the value base_internal::kOnceDone from 32-b... by Abseil Team <absl-team@google.com> - 0f6085f3f0ee1d6baf9a558d07a25c2fcde93273 Remove `compliant` field from some type trait structs. by Matt Armstrong <marmstrong@google.com> GitOrigin-RevId: a0405e7870a80a9dbc6784b06795e7df5a8c90f5 Change-Id: Ic2efd40f6ec35f79a8aa12d4475cbea3150756d7
Diffstat (limited to 'absl/strings/str_cat.h')
-rw-r--r--absl/strings/str_cat.h35
1 files changed, 31 insertions, 4 deletions
diff --git a/absl/strings/str_cat.h b/absl/strings/str_cat.h
index 1cf7b11f..0c33b6cc 100644
--- a/absl/strings/str_cat.h
+++ b/absl/strings/str_cat.h
@@ -76,10 +76,10 @@ struct AlphaNumBuffer {
} // namespace strings_internal
-// Enum that specifies the number of significant digits to return in a `Hex`
-// conversion and fill character to use. A `kZeroPad2` value, for example, would
-// produce hexadecimal strings such as "0A","0F" and 'kSpacePad5' value would
-// produce hexadecimal strings such as " A"," F".
+// Enum that specifies the number of significant digits to return in a `Hex` or
+// `Dec` conversion and fill character to use. A `kZeroPad2` value, for example,
+// would produce hexadecimal strings such as "0A","0F" and a 'kSpacePad5' value
+// would produce hexadecimal strings such as " A"," F".
enum PadSpec {
kNoPad = 1,
kZeroPad2,
@@ -154,6 +154,32 @@ struct Hex {
};
// -----------------------------------------------------------------------------
+// Dec
+// -----------------------------------------------------------------------------
+//
+// `Dec` stores a set of decimal std::string conversion parameters for use
+// within `AlphaNum` std::string conversions. Dec is slower than the default
+// integer conversion, so use it only if you need padding.
+struct Dec {
+ uint64_t value;
+ uint8_t width;
+ char fill;
+ bool neg;
+
+ template <typename Int>
+ explicit Dec(Int v, PadSpec spec = absl::kNoPad,
+ typename std::enable_if<(sizeof(Int) <= 8)>::type* = nullptr)
+ : value(v >= 0 ? static_cast<uint64_t>(v)
+ : uint64_t{0} - static_cast<uint64_t>(v)),
+ width(spec == absl::kNoPad
+ ? 1
+ : spec >= absl::kSpacePad2 ? spec - absl::kSpacePad2 + 2
+ : spec - absl::kZeroPad2 + 2),
+ fill(spec >= absl::kSpacePad2 ? ' ' : '0'),
+ neg(v < 0) {}
+};
+
+// -----------------------------------------------------------------------------
// AlphaNum
// -----------------------------------------------------------------------------
//
@@ -191,6 +217,7 @@ class AlphaNum {
: piece_(digits_, numbers_internal::SixDigitsToBuffer(f, digits_)) {}
AlphaNum(Hex hex); // NOLINT(runtime/explicit)
+ AlphaNum(Dec dec); // NOLINT(runtime/explicit)
template <size_t size>
AlphaNum( // NOLINT(runtime/explicit)