bsnes/nall/atoi.hpp
Tim Allen 82293c95ae Update to v099r14 release.
byuu says:

Changelog:
- (u)int(max,ptr) abbreviations removed; use _t suffix now [didn't feel
  like they were contributing enough to be worth it]
- cleaned up nall::integer,natural,real functionality
  - toInteger, toNatural, toReal for parsing strings to numbers
  - fromInteger, fromNatural, fromReal for creating strings from numbers
  - (string,Markup::Node,SQL-based-classes)::(integer,natural,real)
    left unchanged
  - template<typename T> numeral(T value, long padding, char padchar)
    -> string for print() formatting
    - deduces integer,natural,real based on T ... cast the value if you
      want to override
    - there still exists binary,octal,hex,pointer for explicit print()
      formatting
- lstring -> string_vector [but using lstring = string_vector; is
  declared]
  - would be nice to remove the using lstring eventually ... but that'd
    probably require 10,000 lines of changes >_>
- format -> string_format [no using here; format was too ambiguous]
- using integer = Integer<sizeof(int)*8>; and using natural =
  Natural<sizeof(uint)*8>; declared
  - for consistency with boolean. These three are meant for creating
    zero-initialized values implicitly (various uses)
- R65816::io() -> idle() and SPC700::io() -> idle() [more clear; frees
  up struct IO {} io; naming]
- SFC CPU, PPU, SMP use struct IO {} io; over struct (Status,Registers) {}
  (status,registers); now
  - still some CPU::Status status values ... they didn't really fit into
    IO functionality ... will have to think about this more
- SFC CPU, PPU, SMP now use step() exclusively instead of addClocks()
  calling into step()
- SFC CPU joypad1_bits, joypad2_bits were unused; killed them
- SFC PPU CGRAM moved into PPU::Screen; since nothing else uses it
- SFC PPU OAM moved into PPU::Object; since nothing else uses it
  - the raw uint8[544] array is gone. OAM::read() constructs values from
    the OAM::Object[512] table now
  - this avoids having to determine how we want to sub-divide the two
    OAM memory sections
  - this also eliminates the OAM::synchronize() functionality
- probably more I'm forgetting

The FPS fluctuations are driving me insane. This WIP went from 128fps to
137fps. Settled on 133.5fps for the final build. But nothing I changed
should have affected performance at all. This level of fluctuation makes
it damn near impossible to know whether I'm speeding things up or slowing
things down with changes.
2016-07-01 21:50:32 +10:00

88 lines
2.2 KiB
C++

#pragma once
#include <nall/stdint.hpp>
namespace nall {
constexpr inline auto toBinary_(const char* s, uintmax_t sum = 0) -> uintmax_t {
return (
*s == '0' || *s == '1' ? toBinary_(s + 1, (sum << 1) | *s - '0') :
*s == '\'' ? toBinary_(s + 1, sum) :
sum
);
}
constexpr inline auto toOctal_(const char* s, uintmax_t sum = 0) -> uintmax_t {
return (
*s >= '0' && *s <= '7' ? toOctal_(s + 1, (sum << 3) | *s - '0') :
*s == '\'' ? toOctal_(s + 1, sum) :
sum
);
}
constexpr inline auto toDecimal_(const char* s, uintmax_t sum = 0) -> uintmax_t {
return (
*s >= '0' && *s <= '9' ? toDecimal_(s + 1, (sum * 10) + *s - '0') :
*s == '\'' ? toDecimal_(s + 1, sum) :
sum
);
}
constexpr inline auto toHex_(const char* s, uintmax_t sum = 0) -> uintmax_t {
return (
*s >= 'A' && *s <= 'F' ? toHex_(s + 1, (sum << 4) | *s - 'A' + 10) :
*s >= 'a' && *s <= 'f' ? toHex_(s + 1, (sum << 4) | *s - 'a' + 10) :
*s >= '0' && *s <= '9' ? toHex_(s + 1, (sum << 4) | *s - '0') :
*s == '\'' ? toHex_(s + 1, sum) :
sum
);
}
//
constexpr inline auto toBinary(const char* s) -> uintmax_t {
return (
*s == '0' && (*(s + 1) == 'B' || *(s + 1) == 'b') ? toBinary_(s + 2) :
*s == '%' ? toBinary_(s + 1) : toBinary_(s)
);
}
constexpr inline auto toOctal(const char* s) -> uintmax_t {
return (
*s == '0' && (*(s + 1) == 'O' || *(s + 1) == 'o') ? toOctal_(s + 2) :
toOctal_(s)
);
}
constexpr inline auto toHex(const char* s) -> uintmax_t {
return (
*s == '0' && (*(s + 1) == 'X' || *(s + 1) == 'x') ? toHex_(s + 2) :
*s == '$' ? toHex_(s + 1) : toHex_(s)
);
}
//
constexpr inline auto toNatural(const char* s) -> uintmax_t {
return (
*s == '0' && (*(s + 1) == 'B' || *(s + 1) == 'b') ? toBinary_(s + 2) :
*s == '0' && (*(s + 1) == 'O' || *(s + 1) == 'o') ? toOctal_(s + 2) :
*s == '0' && (*(s + 1) == 'X' || *(s + 1) == 'x') ? toHex_(s + 2) :
*s == '%' ? toBinary_(s + 1) : *s == '$' ? toHex_(s + 1) : toDecimal_(s)
);
}
constexpr inline auto toInteger(const char* s) -> intmax_t {
return (
*s == '+' ? +toNatural(s + 1) : *s == '-' ? -toNatural(s + 1) : toNatural(s)
);
}
//
inline auto toReal(const char* s) -> double {
return atof(s);
}
}