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Convert APint::{fromString,APInt,getBitsNeeded} to use StringRef.

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- Patch by Erick Tryzelaar, with some edits (and a bug fix) from me.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78885 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar
2009-08-13 02:33:34 +00:00
parent 28865062c1
commit 689ad6ef3f
4 changed files with 43 additions and 38 deletions
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26
include/llvm/ADT/APInt.h
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@@ -27,6 +27,7 @@ namespace llvm {
class Deserializer;
class FoldingSetNodeID;
class raw_ostream;
class StringRef;
template<typename T>
class SmallVectorImpl;
@@ -152,8 +153,7 @@ class APInt {
/// This is used by the constructors that take string arguments.
/// @brief Convert a char array into an APInt
void fromString(unsigned numBits, const char *strStart, unsigned slen,
uint8_t radix);
void fromString(unsigned numBits, const StringRef &str, uint8_t radix);
/// This is used by the toString method to divide by the radix. It simply
/// provides a more convenient form of divide for internal use since KnuthDiv
@@ -229,17 +229,17 @@ public:
/// @brief Construct an APInt of numBits width, initialized as bigVal[].
APInt(unsigned numBits, unsigned numWords, const uint64_t bigVal[]);
/// This constructor interprets the slen characters starting at StrStart as
/// a string in the given radix. The interpretation stops when the first
/// character that is not suitable for the radix is encountered. Acceptable
/// radix values are 2, 8, 10 and 16. It is an error for the value implied by
/// the string to require more bits than numBits.
/// This constructor interprets the string \arg str in the given radix. The
/// interpretation stops when the first character that is not suitable for the
/// radix is encountered, or the end of the string. Acceptable radix values
/// are 2, 8, 10 and 16. It is an error for the value implied by the string to
/// require more bits than numBits.
///
/// @param numBits the bit width of the constructed APInt
/// @param strStart the start of the string to be interpreted
/// @param slen the maximum number of characters to interpret
/// @param radix the radix to use for the conversion
/// @param str the string to be interpreted
/// @param radix the radix to use for the conversion
/// @brief Construct an APInt from a string representation.
APInt(unsigned numBits, const char strStart[], unsigned slen, uint8_t radix);
APInt(unsigned numBits, const StringRef &str, uint8_t radix);
/// Simply makes *this a copy of that.
/// @brief Copy Constructor.
@@ -1063,9 +1063,9 @@ public:
}
/// This method determines how many bits are required to hold the APInt
/// equivalent of the string given by \p str of length \p slen.
/// equivalent of the string given by \arg str.
/// @brief Get bits required for string value.
static unsigned getBitsNeeded(const char* str, unsigned slen, uint8_t radix);
static unsigned getBitsNeeded(const StringRef& str, uint8_t radix);
/// countLeadingZeros - This function is an APInt version of the
/// countLeadingZeros_{32,64} functions in MathExtras.h. It counts the number