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1 /* LibTomMath, multiple-precision integer library -- Tom St Denis |
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2 * |
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3 * LibTomMath is a library that provides multiple-precision |
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4 * integer arithmetic as well as number theoretic functionality. |
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5 * |
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6 * The library was designed directly after the MPI library by |
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7 * Michael Fromberger but has been written from scratch with |
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8 * additional optimizations in place. |
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9 * |
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10 * The library is free for all purposes without any express |
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11 * guarantee it works. |
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12 * |
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13 * Tom St Denis, [email protected], http://math.libtomcrypt.org |
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14 */ |
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15 #ifndef BN_H_ |
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16 #define BN_H_ |
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17 |
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18 #include <stdio.h> |
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19 #include <string.h> |
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20 #include <stdlib.h> |
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21 #include <ctype.h> |
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22 #include <limits.h> |
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23 |
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24 #include <tommath_class.h> |
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25 |
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26 #undef MIN |
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27 #define MIN(x,y) ((x)<(y)?(x):(y)) |
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28 #undef MAX |
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29 #define MAX(x,y) ((x)>(y)?(x):(y)) |
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30 |
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31 #ifdef __cplusplus |
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32 extern "C" { |
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33 |
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34 /* C++ compilers don't like assigning void * to mp_digit * */ |
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35 #define OPT_CAST(x) (x *) |
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36 |
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37 #else |
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38 |
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39 /* C on the other hand doesn't care */ |
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40 #define OPT_CAST(x) |
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41 |
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42 #endif |
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43 |
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142
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44 |
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45 /* detect 64-bit mode if possible */ |
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46 #if defined(__x86_64__) |
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47 #if !(defined(MP_64BIT) && defined(MP_16BIT) && defined(MP_8BIT)) |
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48 #define MP_64BIT |
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49 #endif |
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50 #endif |
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51 |
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52 /* some default configurations. |
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53 * |
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54 * A "mp_digit" must be able to hold DIGIT_BIT + 1 bits |
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55 * A "mp_word" must be able to hold 2*DIGIT_BIT + 1 bits |
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56 * |
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57 * At the very least a mp_digit must be able to hold 7 bits |
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58 * [any size beyond that is ok provided it doesn't overflow the data type] |
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59 */ |
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60 #ifdef MP_8BIT |
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61 typedef unsigned char mp_digit; |
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62 typedef unsigned short mp_word; |
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63 #elif defined(MP_16BIT) |
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64 typedef unsigned short mp_digit; |
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65 typedef unsigned long mp_word; |
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66 #elif defined(MP_64BIT) |
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67 /* for GCC only on supported platforms */ |
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68 #ifndef CRYPT |
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69 typedef unsigned long long ulong64; |
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70 typedef signed long long long64; |
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71 #endif |
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72 |
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73 typedef unsigned long mp_digit; |
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74 typedef unsigned long mp_word __attribute__ ((mode(TI))); |
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75 |
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76 #define DIGIT_BIT 60 |
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77 #else |
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78 /* this is the default case, 28-bit digits */ |
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79 |
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80 /* this is to make porting into LibTomCrypt easier :-) */ |
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81 #ifndef CRYPT |
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82 #if defined(_MSC_VER) || defined(__BORLANDC__) |
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83 typedef unsigned __int64 ulong64; |
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84 typedef signed __int64 long64; |
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85 #else |
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86 typedef unsigned long long ulong64; |
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87 typedef signed long long long64; |
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88 #endif |
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89 #endif |
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90 |
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91 typedef unsigned long mp_digit; |
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92 typedef ulong64 mp_word; |
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93 |
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94 #ifdef MP_31BIT |
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95 /* this is an extension that uses 31-bit digits */ |
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96 #define DIGIT_BIT 31 |
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97 #else |
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98 /* default case is 28-bit digits, defines MP_28BIT as a handy macro to test */ |
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99 #define DIGIT_BIT 28 |
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100 #define MP_28BIT |
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101 #endif |
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102 #endif |
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103 |
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104 /* define heap macros */ |
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105 #ifndef CRYPT |
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106 /* default to libc stuff */ |
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107 #ifndef XMALLOC |
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108 #define XMALLOC malloc |
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109 #define XFREE free |
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110 #define XREALLOC realloc |
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111 #define XCALLOC calloc |
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112 #else |
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113 /* prototypes for our heap functions */ |
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114 extern void *XMALLOC(size_t n); |
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115 extern void *REALLOC(void *p, size_t n); |
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116 extern void *XCALLOC(size_t n, size_t s); |
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117 extern void XFREE(void *p); |
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118 #endif |
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119 #endif |
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120 |
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121 |
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122 /* otherwise the bits per digit is calculated automatically from the size of a mp_digit */ |
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123 #ifndef DIGIT_BIT |
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124 #define DIGIT_BIT ((int)((CHAR_BIT * sizeof(mp_digit) - 1))) /* bits per digit */ |
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125 #endif |
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126 |
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127 #define MP_DIGIT_BIT DIGIT_BIT |
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128 #define MP_MASK ((((mp_digit)1)<<((mp_digit)DIGIT_BIT))-((mp_digit)1)) |
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129 #define MP_DIGIT_MAX MP_MASK |
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130 |
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131 /* equalities */ |
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132 #define MP_LT -1 /* less than */ |
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133 #define MP_EQ 0 /* equal to */ |
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134 #define MP_GT 1 /* greater than */ |
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135 |
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136 #define MP_ZPOS 0 /* positive integer */ |
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137 #define MP_NEG 1 /* negative */ |
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138 |
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139 #define MP_OKAY 0 /* ok result */ |
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140 #define MP_MEM -2 /* out of mem */ |
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141 #define MP_VAL -3 /* invalid input */ |
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142 #define MP_RANGE MP_VAL |
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143 |
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144 #define MP_YES 1 /* yes response */ |
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145 #define MP_NO 0 /* no response */ |
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146 |
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147 /* Primality generation flags */ |
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148 #define LTM_PRIME_BBS 0x0001 /* BBS style prime */ |
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149 #define LTM_PRIME_SAFE 0x0002 /* Safe prime (p-1)/2 == prime */ |
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150 #define LTM_PRIME_2MSB_OFF 0x0004 /* force 2nd MSB to 0 */ |
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151 #define LTM_PRIME_2MSB_ON 0x0008 /* force 2nd MSB to 1 */ |
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152 |
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153 typedef int mp_err; |
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154 |
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155 /* you'll have to tune these... */ |
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156 extern int KARATSUBA_MUL_CUTOFF, |
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157 KARATSUBA_SQR_CUTOFF, |
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158 TOOM_MUL_CUTOFF, |
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159 TOOM_SQR_CUTOFF; |
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160 |
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161 /* define this to use lower memory usage routines (exptmods mostly) */ |
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162 /* #define MP_LOW_MEM */ |
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163 |
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164 /* default precision */ |
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165 #ifndef MP_PREC |
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166 #ifndef MP_LOW_MEM |
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167 #define MP_PREC 64 /* default digits of precision */ |
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168 #else |
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169 #define MP_PREC 8 /* default digits of precision */ |
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170 #endif |
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171 #endif |
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172 |
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173 /* size of comba arrays, should be at least 2 * 2**(BITS_PER_WORD - BITS_PER_DIGIT*2) */ |
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174 #define MP_WARRAY (1 << (sizeof(mp_word) * CHAR_BIT - 2 * DIGIT_BIT + 1)) |
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175 |
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176 /* the infamous mp_int structure */ |
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177 typedef struct { |
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178 int used, alloc, sign; |
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179 mp_digit *dp; |
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180 } mp_int; |
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181 |
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182 /* callback for mp_prime_random, should fill dst with random bytes and return how many read [upto len] */ |
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183 typedef int ltm_prime_callback(unsigned char *dst, int len, void *dat); |
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184 |
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185 |
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186 #define USED(m) ((m)->used) |
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187 #define DIGIT(m,k) ((m)->dp[(k)]) |
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188 #define SIGN(m) ((m)->sign) |
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189 |
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190 /* error code to char* string */ |
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191 char *mp_error_to_string(int code); |
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192 |
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193 /* ---> init and deinit bignum functions <--- */ |
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194 /* init a bignum */ |
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195 int mp_init(mp_int *a); |
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196 |
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197 /* free a bignum */ |
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198 void mp_clear(mp_int *a); |
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199 |
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200 /* init a null terminated series of arguments */ |
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201 int mp_init_multi(mp_int *mp, ...); |
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202 |
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203 /* clear a null terminated series of arguments */ |
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204 void mp_clear_multi(mp_int *mp, ...); |
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205 |
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206 /* exchange two ints */ |
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207 void mp_exch(mp_int *a, mp_int *b); |
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208 |
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209 /* shrink ram required for a bignum */ |
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210 int mp_shrink(mp_int *a); |
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211 |
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212 /* grow an int to a given size */ |
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213 int mp_grow(mp_int *a, int size); |
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214 |
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215 /* init to a given number of digits */ |
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216 int mp_init_size(mp_int *a, int size); |
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217 |
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218 /* ---> Basic Manipulations <--- */ |
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219 #define mp_iszero(a) (((a)->used == 0) ? MP_YES : MP_NO) |
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220 #define mp_iseven(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 0)) ? MP_YES : MP_NO) |
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221 #define mp_isodd(a) (((a)->used > 0 && (((a)->dp[0] & 1) == 1)) ? MP_YES : MP_NO) |
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222 |
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223 /* set to zero */ |
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224 void mp_zero(mp_int *a); |
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225 |
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226 /* set to a digit */ |
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227 void mp_set(mp_int *a, mp_digit b); |
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228 |
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229 /* set a 32-bit const */ |
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230 int mp_set_int(mp_int *a, unsigned long b); |
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231 |
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232 /* get a 32-bit value */ |
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233 unsigned long mp_get_int(mp_int * a); |
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234 |
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235 /* initialize and set a digit */ |
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236 int mp_init_set (mp_int * a, mp_digit b); |
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237 |
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238 /* initialize and set 32-bit value */ |
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239 int mp_init_set_int (mp_int * a, unsigned long b); |
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240 |
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241 /* copy, b = a */ |
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242 int mp_copy(mp_int *a, mp_int *b); |
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243 |
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244 /* inits and copies, a = b */ |
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245 int mp_init_copy(mp_int *a, mp_int *b); |
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246 |
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247 /* trim unused digits */ |
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248 void mp_clamp(mp_int *a); |
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249 |
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250 /* ---> digit manipulation <--- */ |
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251 |
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252 /* right shift by "b" digits */ |
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253 void mp_rshd(mp_int *a, int b); |
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254 |
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255 /* left shift by "b" digits */ |
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256 int mp_lshd(mp_int *a, int b); |
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257 |
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258 /* c = a / 2**b */ |
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259 int mp_div_2d(mp_int *a, int b, mp_int *c, mp_int *d); |
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260 |
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261 /* b = a/2 */ |
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262 int mp_div_2(mp_int *a, mp_int *b); |
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263 |
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264 /* c = a * 2**b */ |
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265 int mp_mul_2d(mp_int *a, int b, mp_int *c); |
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266 |
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267 /* b = a*2 */ |
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268 int mp_mul_2(mp_int *a, mp_int *b); |
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269 |
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270 /* c = a mod 2**d */ |
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271 int mp_mod_2d(mp_int *a, int b, mp_int *c); |
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272 |
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273 /* computes a = 2**b */ |
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274 int mp_2expt(mp_int *a, int b); |
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275 |
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276 /* Counts the number of lsbs which are zero before the first zero bit */ |
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277 int mp_cnt_lsb(mp_int *a); |
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278 |
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279 /* I Love Earth! */ |
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280 |
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281 /* makes a pseudo-random int of a given size */ |
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282 int mp_rand(mp_int *a, int digits); |
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283 |
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284 /* ---> binary operations <--- */ |
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285 /* c = a XOR b */ |
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286 int mp_xor(mp_int *a, mp_int *b, mp_int *c); |
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287 |
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288 /* c = a OR b */ |
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289 int mp_or(mp_int *a, mp_int *b, mp_int *c); |
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290 |
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291 /* c = a AND b */ |
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292 int mp_and(mp_int *a, mp_int *b, mp_int *c); |
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293 |
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294 /* ---> Basic arithmetic <--- */ |
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295 |
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296 /* b = -a */ |
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297 int mp_neg(mp_int *a, mp_int *b); |
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298 |
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299 /* b = |a| */ |
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300 int mp_abs(mp_int *a, mp_int *b); |
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301 |
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302 /* compare a to b */ |
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303 int mp_cmp(mp_int *a, mp_int *b); |
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304 |
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305 /* compare |a| to |b| */ |
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306 int mp_cmp_mag(mp_int *a, mp_int *b); |
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307 |
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308 /* c = a + b */ |
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309 int mp_add(mp_int *a, mp_int *b, mp_int *c); |
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310 |
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311 /* c = a - b */ |
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312 int mp_sub(mp_int *a, mp_int *b, mp_int *c); |
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313 |
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314 /* c = a * b */ |
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315 int mp_mul(mp_int *a, mp_int *b, mp_int *c); |
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316 |
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317 /* b = a*a */ |
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318 int mp_sqr(mp_int *a, mp_int *b); |
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319 |
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320 /* a/b => cb + d == a */ |
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321 int mp_div(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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322 |
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323 /* c = a mod b, 0 <= c < b */ |
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324 int mp_mod(mp_int *a, mp_int *b, mp_int *c); |
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325 |
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326 /* ---> single digit functions <--- */ |
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327 |
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328 /* compare against a single digit */ |
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329 int mp_cmp_d(mp_int *a, mp_digit b); |
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330 |
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331 /* c = a + b */ |
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332 int mp_add_d(mp_int *a, mp_digit b, mp_int *c); |
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333 |
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334 /* c = a - b */ |
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335 int mp_sub_d(mp_int *a, mp_digit b, mp_int *c); |
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336 |
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337 /* c = a * b */ |
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338 int mp_mul_d(mp_int *a, mp_digit b, mp_int *c); |
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339 |
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340 /* a/b => cb + d == a */ |
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341 int mp_div_d(mp_int *a, mp_digit b, mp_int *c, mp_digit *d); |
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342 |
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343 /* a/3 => 3c + d == a */ |
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344 int mp_div_3(mp_int *a, mp_int *c, mp_digit *d); |
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345 |
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346 /* c = a**b */ |
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347 int mp_expt_d(mp_int *a, mp_digit b, mp_int *c); |
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348 |
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349 /* c = a mod b, 0 <= c < b */ |
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350 int mp_mod_d(mp_int *a, mp_digit b, mp_digit *c); |
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351 |
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352 /* ---> number theory <--- */ |
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353 |
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354 /* d = a + b (mod c) */ |
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355 int mp_addmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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356 |
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357 /* d = a - b (mod c) */ |
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358 int mp_submod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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359 |
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360 /* d = a * b (mod c) */ |
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361 int mp_mulmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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362 |
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363 /* c = a * a (mod b) */ |
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364 int mp_sqrmod(mp_int *a, mp_int *b, mp_int *c); |
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365 |
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366 /* c = 1/a (mod b) */ |
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367 int mp_invmod(mp_int *a, mp_int *b, mp_int *c); |
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368 |
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369 /* c = (a, b) */ |
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370 int mp_gcd(mp_int *a, mp_int *b, mp_int *c); |
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371 |
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372 /* produces value such that U1*a + U2*b = U3 */ |
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373 int mp_exteuclid(mp_int *a, mp_int *b, mp_int *U1, mp_int *U2, mp_int *U3); |
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374 |
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375 /* c = [a, b] or (a*b)/(a, b) */ |
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376 int mp_lcm(mp_int *a, mp_int *b, mp_int *c); |
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377 |
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378 /* finds one of the b'th root of a, such that |c|**b <= |a| |
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379 * |
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380 * returns error if a < 0 and b is even |
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381 */ |
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382 int mp_n_root(mp_int *a, mp_digit b, mp_int *c); |
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383 |
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384 /* special sqrt algo */ |
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385 int mp_sqrt(mp_int *arg, mp_int *ret); |
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386 |
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387 /* is number a square? */ |
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388 int mp_is_square(mp_int *arg, int *ret); |
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389 |
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390 /* computes the jacobi c = (a | n) (or Legendre if b is prime) */ |
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391 int mp_jacobi(mp_int *a, mp_int *n, int *c); |
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392 |
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393 /* used to setup the Barrett reduction for a given modulus b */ |
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394 int mp_reduce_setup(mp_int *a, mp_int *b); |
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395 |
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396 /* Barrett Reduction, computes a (mod b) with a precomputed value c |
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397 * |
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398 * Assumes that 0 < a <= b*b, note if 0 > a > -(b*b) then you can merely |
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399 * compute the reduction as -1 * mp_reduce(mp_abs(a)) [pseudo code]. |
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400 */ |
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401 int mp_reduce(mp_int *a, mp_int *b, mp_int *c); |
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402 |
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403 /* setups the montgomery reduction */ |
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404 int mp_montgomery_setup(mp_int *a, mp_digit *mp); |
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405 |
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406 /* computes a = B**n mod b without division or multiplication useful for |
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407 * normalizing numbers in a Montgomery system. |
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408 */ |
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409 int mp_montgomery_calc_normalization(mp_int *a, mp_int *b); |
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410 |
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411 /* computes x/R == x (mod N) via Montgomery Reduction */ |
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412 int mp_montgomery_reduce(mp_int *a, mp_int *m, mp_digit mp); |
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413 |
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414 /* returns 1 if a is a valid DR modulus */ |
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415 int mp_dr_is_modulus(mp_int *a); |
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416 |
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417 /* sets the value of "d" required for mp_dr_reduce */ |
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418 void mp_dr_setup(mp_int *a, mp_digit *d); |
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419 |
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420 /* reduces a modulo b using the Diminished Radix method */ |
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421 int mp_dr_reduce(mp_int *a, mp_int *b, mp_digit mp); |
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422 |
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423 /* returns true if a can be reduced with mp_reduce_2k */ |
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424 int mp_reduce_is_2k(mp_int *a); |
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425 |
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426 /* determines k value for 2k reduction */ |
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427 int mp_reduce_2k_setup(mp_int *a, mp_digit *d); |
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428 |
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429 /* reduces a modulo b where b is of the form 2**p - k [0 <= a] */ |
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430 int mp_reduce_2k(mp_int *a, mp_int *n, mp_digit d); |
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431 |
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432 /* d = a**b (mod c) */ |
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433 int mp_exptmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d); |
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434 |
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435 /* ---> Primes <--- */ |
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436 |
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437 /* number of primes */ |
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438 #ifdef MP_8BIT |
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439 #define PRIME_SIZE 31 |
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440 #else |
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441 #define PRIME_SIZE 256 |
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442 #endif |
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443 |
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444 /* table of first PRIME_SIZE primes */ |
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445 extern const mp_digit __prime_tab[]; |
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446 |
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447 /* result=1 if a is divisible by one of the first PRIME_SIZE primes */ |
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448 int mp_prime_is_divisible(mp_int *a, int *result); |
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449 |
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450 /* performs one Fermat test of "a" using base "b". |
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451 * Sets result to 0 if composite or 1 if probable prime |
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452 */ |
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453 int mp_prime_fermat(mp_int *a, mp_int *b, int *result); |
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454 |
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455 /* performs one Miller-Rabin test of "a" using base "b". |
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456 * Sets result to 0 if composite or 1 if probable prime |
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457 */ |
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458 int mp_prime_miller_rabin(mp_int *a, mp_int *b, int *result); |
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459 |
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460 /* This gives [for a given bit size] the number of trials required |
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461 * such that Miller-Rabin gives a prob of failure lower than 2^-96 |
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462 */ |
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463 int mp_prime_rabin_miller_trials(int size); |
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464 |
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465 /* performs t rounds of Miller-Rabin on "a" using the first |
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466 * t prime bases. Also performs an initial sieve of trial |
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467 * division. Determines if "a" is prime with probability |
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468 * of error no more than (1/4)**t. |
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469 * |
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470 * Sets result to 1 if probably prime, 0 otherwise |
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471 */ |
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472 int mp_prime_is_prime(mp_int *a, int t, int *result); |
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473 |
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474 /* finds the next prime after the number "a" using "t" trials |
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475 * of Miller-Rabin. |
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476 * |
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477 * bbs_style = 1 means the prime must be congruent to 3 mod 4 |
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478 */ |
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479 int mp_prime_next_prime(mp_int *a, int t, int bbs_style); |
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480 |
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481 /* makes a truly random prime of a given size (bytes), |
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482 * call with bbs = 1 if you want it to be congruent to 3 mod 4 |
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483 * |
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484 * You have to supply a callback which fills in a buffer with random bytes. "dat" is a parameter you can |
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485 * have passed to the callback (e.g. a state or something). This function doesn't use "dat" itself |
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486 * so it can be NULL |
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487 * |
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488 * The prime generated will be larger than 2^(8*size). |
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489 */ |
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490 #define mp_prime_random(a, t, size, bbs, cb, dat) mp_prime_random_ex(a, t, ((size) * 8) + 1, (bbs==1)?LTM_PRIME_BBS:0, cb, dat) |
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491 |
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492 /* makes a truly random prime of a given size (bits), |
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493 * |
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494 * Flags are as follows: |
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495 * |
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496 * LTM_PRIME_BBS - make prime congruent to 3 mod 4 |
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497 * LTM_PRIME_SAFE - make sure (p-1)/2 is prime as well (implies LTM_PRIME_BBS) |
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498 * LTM_PRIME_2MSB_OFF - make the 2nd highest bit zero |
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499 * LTM_PRIME_2MSB_ON - make the 2nd highest bit one |
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500 * |
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501 * You have to supply a callback which fills in a buffer with random bytes. "dat" is a parameter you can |
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502 * have passed to the callback (e.g. a state or something). This function doesn't use "dat" itself |
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503 * so it can be NULL |
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504 * |
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505 */ |
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506 int mp_prime_random_ex(mp_int *a, int t, int size, int flags, ltm_prime_callback cb, void *dat); |
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507 |
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508 /* ---> radix conversion <--- */ |
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509 int mp_count_bits(mp_int *a); |
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510 |
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511 int mp_unsigned_bin_size(mp_int *a); |
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512 int mp_read_unsigned_bin(mp_int *a, unsigned char *b, int c); |
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513 int mp_to_unsigned_bin(mp_int *a, unsigned char *b); |
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514 |
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515 int mp_signed_bin_size(mp_int *a); |
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516 int mp_read_signed_bin(mp_int *a, unsigned char *b, int c); |
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517 int mp_to_signed_bin(mp_int *a, unsigned char *b); |
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518 |
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519 int mp_read_radix(mp_int *a, char *str, int radix); |
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520 int mp_toradix(mp_int *a, char *str, int radix); |
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521 int mp_toradix_n(mp_int * a, char *str, int radix, int maxlen); |
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522 int mp_radix_size(mp_int *a, int radix, int *size); |
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523 |
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524 int mp_fread(mp_int *a, int radix, FILE *stream); |
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525 int mp_fwrite(mp_int *a, int radix, FILE *stream); |
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526 |
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527 #define mp_read_raw(mp, str, len) mp_read_signed_bin((mp), (str), (len)) |
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528 #define mp_raw_size(mp) mp_signed_bin_size(mp) |
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529 #define mp_toraw(mp, str) mp_to_signed_bin((mp), (str)) |
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530 #define mp_read_mag(mp, str, len) mp_read_unsigned_bin((mp), (str), (len)) |
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531 #define mp_mag_size(mp) mp_unsigned_bin_size(mp) |
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532 #define mp_tomag(mp, str) mp_to_unsigned_bin((mp), (str)) |
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533 |
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534 #define mp_tobinary(M, S) mp_toradix((M), (S), 2) |
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535 #define mp_tooctal(M, S) mp_toradix((M), (S), 8) |
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536 #define mp_todecimal(M, S) mp_toradix((M), (S), 10) |
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537 #define mp_tohex(M, S) mp_toradix((M), (S), 16) |
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538 |
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539 /* lowlevel functions, do not call! */ |
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540 int s_mp_add(mp_int *a, mp_int *b, mp_int *c); |
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541 int s_mp_sub(mp_int *a, mp_int *b, mp_int *c); |
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542 #define s_mp_mul(a, b, c) s_mp_mul_digs(a, b, c, (a)->used + (b)->used + 1) |
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543 int fast_s_mp_mul_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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544 int s_mp_mul_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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545 int fast_s_mp_mul_high_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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546 int s_mp_mul_high_digs(mp_int *a, mp_int *b, mp_int *c, int digs); |
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547 int fast_s_mp_sqr(mp_int *a, mp_int *b); |
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548 int s_mp_sqr(mp_int *a, mp_int *b); |
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549 int mp_karatsuba_mul(mp_int *a, mp_int *b, mp_int *c); |
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550 int mp_toom_mul(mp_int *a, mp_int *b, mp_int *c); |
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551 int mp_karatsuba_sqr(mp_int *a, mp_int *b); |
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552 int mp_toom_sqr(mp_int *a, mp_int *b); |
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553 int fast_mp_invmod(mp_int *a, mp_int *b, mp_int *c); |
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554 int mp_invmod_slow (mp_int * a, mp_int * b, mp_int * c); |
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555 int fast_mp_montgomery_reduce(mp_int *a, mp_int *m, mp_digit mp); |
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556 int mp_exptmod_fast(mp_int *G, mp_int *X, mp_int *P, mp_int *Y, int mode); |
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557 int s_mp_exptmod (mp_int * G, mp_int * X, mp_int * P, mp_int * Y); |
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558 void bn_reverse(unsigned char *s, int len); |
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559 |
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560 extern const char *mp_s_rmap; |
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561 |
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562 #ifdef __cplusplus |
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563 } |
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564 #endif |
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565 |
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566 #endif |
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567 |
