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author | Daniel Dunbar <daniel@zuster.org> | 2009-07-29 07:08:44 +0000 |
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committer | Daniel Dunbar <daniel@zuster.org> | 2009-07-29 07:08:44 +0000 |
commit | 763457e70bc9c5c2def89d24a133808b8a971f9f (patch) | |
tree | 377376c3b2be90bda1f666bec5aec817ffe5df1b /include | |
parent | 78a3dd8fe141f98aaf8fbd92cfb7c97d4ddf19d6 (diff) | |
download | external_llvm-763457e70bc9c5c2def89d24a133808b8a971f9f.zip external_llvm-763457e70bc9c5c2def89d24a133808b8a971f9f.tar.gz external_llvm-763457e70bc9c5c2def89d24a133808b8a971f9f.tar.bz2 |
Twines: Support numeric conversion directly (uitostr, etc).
- Provides static constructors for doing number to string conversions without
using temporaries.
- There are several ways to do this, I think given the Twine constraints this
is the simplest one.
- One FIXME for fast number -> hex conversion.
- Added another comment on one last major bit of perf work Twines need, which
is to make raw_svector_ostream more efficient.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77445 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include')
-rw-r--r-- | include/llvm/ADT/Twine.h | 53 |
1 files changed, 45 insertions, 8 deletions
diff --git a/include/llvm/ADT/Twine.h b/include/llvm/ADT/Twine.h index 93ff52c..8518395 100644 --- a/include/llvm/ADT/Twine.h +++ b/include/llvm/ADT/Twine.h @@ -86,6 +86,9 @@ namespace llvm { /// The empty string. EmptyKind, + /// A pointer to a Twine instance. + TwineKind, + /// A pointer to a C string instance. CStringKind, @@ -95,8 +98,16 @@ namespace llvm { /// A pointer to a StringRef instance. StringRefKind, - /// A pointer to a Twine instance. - TwineKind + /// A pointer to a uint64_t value, to render as an unsigned decimal + /// integer. + UDecKind, + + /// A pointer to a uint64_t value, to render as an unsigned hexadecimal + /// integer. + UHexKind, + + /// A pointer to a uint64_t value, to render as a signed decimal integer. + SDecKind }; private: @@ -232,12 +243,6 @@ namespace llvm { assert(isValid() && "Invalid twine!"); } - /// Create a 'null' string, which is an empty string that always - /// concatenates to form another empty string. - static Twine createNull() { - return Twine(NullKind); - } - // FIXME: Unfortunately, to make sure this is as efficient as possible we // need extra binary constructors from particular types. We can't rely on // the compiler to be smart enough to fold operator+()/concat() down to the @@ -255,6 +260,38 @@ namespace llvm { assert(isValid() && "Invalid twine!"); } + /// Create a 'null' string, which is an empty string that always + /// concatenates to form another empty string. + static Twine createNull() { + return Twine(NullKind); + } + + /// @} + /// @name Numeric Conversions + /// @{ + + /// Construct a twine to print \arg Val as an unsigned decimal integer. + static Twine utostr(const uint64_t &Val) { + return Twine(&Val, UDecKind, 0, EmptyKind); + } + + /// Construct a twine to print \arg Val as a signed decimal integer. + static Twine itostr(const int64_t &Val) { + return Twine(&Val, SDecKind, 0, EmptyKind); + } + + // Construct a twine to print \arg Val as an unsigned hexadecimal integer. + static Twine utohexstr(const uint64_t &Val) { + return Twine(&Val, UHexKind, 0, EmptyKind); + } + + // Construct a twine to print \arg Val as an unsigned hexadecimal + // integer. This routine is provided as a convenience to sign extend values + // before printing. + static Twine itohexstr(const int64_t &Val) { + return Twine(&Val, UHexKind, 0, EmptyKind); + } + /// @} /// @name String Operations /// @{ |