Home Explore Help
Register Sign In
houwenfeng
/
scd_tools_go
1
0
Fork 0
Files Issues 0 Pull Requests 0 Wiki
Branch: master
Branches Tags
scd_tools_go
/
service
/
scdcrc
/
calcscdcrc
/
sformat.h

sformat.h 4.7 KB
Permalink History Raw

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990 
  1. #pragma once
    2. 

  2. 

  3. #include <tuple>
    4. 

  4. #include <string>
    5. 

  5. #include <algorithm>
    6. 

  6. 

  7. template <class T>
    8. 

  8. inline void ToString(std::string& ret, T&& val)
    9. 

  9. {
    10. 

  10. 	ret.append(std::to_string(std::forward<T>(val)));
    11. 

  11. }
    12. 

  12. 

  13. inline void ToString(std::string& ret, const std::string& val)
    14. 

  14. {
    15. 

  15. 	ret.append(val);
    16. 

  16. }
    17. 

  17. 

  18. inline void ToString(std::string& ret, const char* val)
    19. 

  19. {
    20. 

  20. 	ret.append(val);
    21. 

  21. }
    22. 

  22. 

  23. template <int N>
    24. 

  24. struct SFormatN {
    25. 

  25. 	static std::string Format(const char* fmt)
    26. 

  26. 	{
    27. 

  27. 		//static_assert(false, "This should never happen");
    28. 

  28. 	}
    29. 

  29. };
    30. 

  30. 

  31. template <>
    32. 

  32. struct SFormatN<0> {
    33. 

  33. 	template <class ...ARGS>
    34. 

  34. 	static std::string Format(const char* fmt, const std::tuple<ARGS...>&)
    35. 

  35. 	{
    36. 

  36. 		return fmt;
    37. 

  37. 	}
    38. 

  38. };
    39. 

  39. 

  40. template <class ...ARGS>
    41. 

  41. std::string SFormat(const char* fmt, const ARGS &...args)
    42. 

  42. {
    43. 

  43. 	const auto tuple = std::forward_as_tuple(args...);
    44. 

  44. 	return SFormatN<sizeof...(args)>::Format(fmt, tuple);
    45. 

  45. }
    46. 

  46. 

  47. #define FMT_N(idx)	case idx: ToString(ret, std::get<idx>(args)); break;
    48. 

  48. 

  49. #define FMT_PARSE(N, ...)															\
    50. 

  50. template <>																			\
    51. 

  51. struct SFormatN<N> {																\
    52. 

  52. 	template <class... ARGS>														\
    53. 

  53. 	static std::string Format(const char * fmt, const std::tuple<ARGS...> & args)	\
    54. 

  54. 	{	std::string ret;															\
    55. 

  55. 		while (*fmt != '\0') { auto idx = -1;										\
    56. 

  56. 			if (*fmt == '{') { idx = 0; ++fmt;										\
    57. 

  57. 				while (*fmt >= '0' && *fmt <= '9')									\
    58. 

  58. 					{ idx *= 10; idx += (int)(*fmt++ - '0'); }						\
    59. 

  59. 				if (*fmt != '}') idx = -1; else ++fmt;								\
    60. 

  60. 			}																		\
    61. 

  61. 			switch (idx) { __VA_ARGS__ default: ret.append(1, *fmt++); break; }		\
    62. 

  62. 		}																			\
    63. 

  63. 		return ret;																	\
    64. 

  64. 	}																				\
    65. 

  65. };
    66. 

  66. 

  67. FMT_PARSE(1, FMT_N(0))
    68. 

  68. FMT_PARSE(2, FMT_N(0) FMT_N(1))
    69. 

  69. FMT_PARSE(3, FMT_N(0) FMT_N(1) FMT_N(2))
    70. 

  70. FMT_PARSE(4, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3))
    71. 

  71. FMT_PARSE(5, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4))
    72. 

  72. FMT_PARSE(6, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5))
    73. 

  73. FMT_PARSE(7, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6))
    74. 

  74. FMT_PARSE(8, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7))
    75. 

  75. FMT_PARSE(9, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8))
    76. 

  76. FMT_PARSE(10, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9))
    77. 

  77. FMT_PARSE(11, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10))
    78. 

  78. FMT_PARSE(12, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11))
    79. 

  79. FMT_PARSE(13, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12))
    80. 

  80. FMT_PARSE(14, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13))
    81. 

  81. FMT_PARSE(15, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14))
    82. 

  82. FMT_PARSE(16, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15))
    83. 

  83. FMT_PARSE(17, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16))
    84. 

  84. FMT_PARSE(18, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16) FMT_N(17))
    85. 

  85. FMT_PARSE(19, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16) FMT_N(17) FMT_N(18))
    86. 

  86. FMT_PARSE(20, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16) FMT_N(17) FMT_N(18) FMT_N(19))
    87. 

  87. FMT_PARSE(21, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16) FMT_N(17) FMT_N(18) FMT_N(19) FMT_N(20))
    88. 

  88. FMT_PARSE(22, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16) FMT_N(17) FMT_N(18) FMT_N(19) FMT_N(20) FMT_N(21))
    89. 

  89. FMT_PARSE(23, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16) FMT_N(17) FMT_N(18) FMT_N(19) FMT_N(20) FMT_N(21) FMT_N(22))
    90. 

  90. FMT_PARSE(24, FMT_N(0) FMT_N(1) FMT_N(2) FMT_N(3) FMT_N(4) FMT_N(5) FMT_N(6) FMT_N(7) FMT_N(8) FMT_N(9) FMT_N(10) FMT_N(11) FMT_N(12) FMT_N(13) FMT_N(14) FMT_N(15) FMT_N(16) FMT_N(17) FMT_N(18) FMT_N(19) FMT_N(20) FMT_N(21) FMT_N(22) FMT_N(23))
    91.