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1 /* |
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2 * matiec - a compiler for the programming languages defined in IEC 61131-3 |
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3 * Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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4 * Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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5 * |
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6 * This program is free software: you can redistribute it and/or modify |
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7 * it under the terms of the GNU General Public License as published by |
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8 * the Free Software Foundation, either version 3 of the License, or |
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9 * (at your option) any later version. |
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10 * |
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11 * This program is distributed in the hope that it will be useful, |
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 * GNU General Public License for more details. |
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15 * |
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16 * You should have received a copy of the GNU General Public License |
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17 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 * |
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19 * |
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20 * This code is made available on the understanding that it will not be |
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21 * used in safety-critical situations without a full and competent review. |
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22 */ |
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23 |
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24 /* |
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25 * An IEC 61131-3 compiler. |
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26 * |
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27 * Based on the |
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28 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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29 * |
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30 */ |
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31 |
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32 |
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33 |
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34 #ifndef _MAIN_HH |
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35 #define _MAIN_HH |
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36 |
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37 |
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38 |
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39 /* Function used throughout the code --> used to report failed assertions (i.e. internal compiler errors)! */ |
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40 #include <stddef.h> /* required for NULL */ |
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41 |
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42 #define ERROR error_exit(__FILE__,__LINE__) |
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43 #define ERROR_MSG(msg, ...) error_exit(__FILE__,__LINE__, msg) |
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44 // #define ERROR_MSG(msg, ...) error_exit(__FILE__,__LINE__, msg, __VA_ARGS__) |
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45 |
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46 extern void error_exit(const char *file_name, int line_no, const char *errmsg = NULL, ...); |
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47 |
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48 |
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49 |
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50 |
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51 |
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52 |
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53 /* Get the definition of INT16_MAX, INT16_MIN, UINT64_MAX, INT64_MAX, INT64_MIN, ... */ |
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54 |
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55 #define __STDC_LIMIT_MACROS /* required to have UINTxx_MAX defined when including stdint.h from C++ source code. */ |
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56 #include <stdint.h> |
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57 #include <limits> |
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58 |
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59 #ifndef UINT64_MAX |
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60 #define UINT64_MAX (std::numeric_limits< uint64_t >::max()) |
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61 #endif |
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62 #ifndef INT64_MAX |
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63 #define INT64_MAX (std::numeric_limits< int64_t >::max()) |
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64 #endif |
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65 #ifndef INT64_MIN |
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66 #define INT64_MIN (std::numeric_limits< int64_t >::min()) |
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67 #endif |
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68 |
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69 |
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70 |
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71 /* Determine, for the current platform, which datas types (float, double or long double) use 64 and 32 bits. */ |
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72 /* NOTE: We cant use sizeof() in pre-processor directives, so we have to do it another way... */ |
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73 /* CURIOSITY: We can use sizeof() and offsetof() inside static_assert() but: |
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74 * - this only allows us to make assertions, and not #define new macros |
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75 * - is only available in the C standard [ISO/IEC 9899:2011] and the C++ 0X draft standard [Becker 2008]. It is not available in C99. |
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76 * https://www.securecoding.cert.org/confluence/display/seccode/DCL03-C.+Use+a+static+assertion+to+test+the+value+of+a+constant+expression |
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77 * struct {int a, b, c, d} header_t; |
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78 * e.g.: static_assert(offsetof(struct header_t, c) == 8, "Compile time error message."); |
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79 */ |
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80 |
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81 #include <float.h> |
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82 #if (LDBL_MANT_DIG == 53) /* NOTE: 64 bit IEC559 real has 53 bits for mantissa! */ |
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83 #define long_double long double |
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84 #define real64_t long_double /* so we can later use #if (real64_t == long_double) directives in the code! */ |
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85 #define REAL64_MAX LDBL_MAX |
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86 #elif ( DBL_MANT_DIG == 53) /* NOTE: 64 bit IEC559 real has 53 bits for mantissa! */ |
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87 #define real64_t double |
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88 #define REAL64_MAX DBL_MAX |
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89 #elif ( FLT_MANT_DIG == 53) /* NOTE: 64 bit IEC559 real has 53 bits for mantissa! */ |
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90 #define real64_t float |
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91 #define REAL64_MAX FLT_MAX |
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92 #else |
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93 #error Could not find a 64 bit floating point data type on this platform. Aborting... |
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94 #endif |
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95 |
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96 |
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97 #if (LDBL_MANT_DIG == 24) /* NOTE: 32 bit IEC559 real has 24 bits for mantissa! */ |
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98 #ifndef long_double |
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99 #define long_double long double |
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100 #endif |
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101 #define real32_t long_double /* so we can later use #if (real32_t == long_double) directives in the code! */ |
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102 #define REAL32_MAX LDBL_MAX |
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103 #elif ( DBL_MANT_DIG == 24) /* NOTE: 32 bit IEC559 real has 24 bits for mantissa! */ |
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104 #define real32_t double |
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105 #define REAL32_MAX DBL_MAX |
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106 #elif ( FLT_MANT_DIG == 24) /* NOTE: 32 bit IEC559 real has 24 bits for mantissa! */ |
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107 #define real32_t float |
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108 #define REAL32_MAX FLT_MAX |
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109 #else |
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110 #error Could not find a 32 bit floating point data type on this platform. Aborting... |
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111 #endif |
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112 |
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113 |
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114 |
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115 #include <math.h> |
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116 #ifndef INFINITY |
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117 #error Could not find the macro that defines the value for INFINITY in the current platform. |
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118 #endif |
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119 #ifndef NAN |
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120 #error Could not find the macro that defines the value for NAN in the current platform. |
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121 #endif |
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122 |
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123 |
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124 |
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125 |
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126 |
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127 #endif // #ifndef _MAIN_HH |