1 | #ifndef CONSTRAINT_H |
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2 | #define CONSTRAINT_H |
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3 | |
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4 | /* |
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5 | o---------------------------------------------------------------------o |
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6 | | |
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7 | | Numdiff |
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8 | | |
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9 | | Copyright (c) 2012+ laurent.deniau@cern.ch |
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10 | | Gnu General Public License |
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11 | | |
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12 | o---------------------------------------------------------------------o |
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13 | |
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14 | Purpose: |
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15 | create constraints content |
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16 | print, scan constraints from file |
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17 | |
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18 | o---------------------------------------------------------------------o |
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19 | */ |
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20 | |
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21 | #include <stdio.h> |
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22 | #include <string.h> |
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23 | #include "slice.h" |
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24 | #include "error.h" |
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25 | |
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26 | // ----- constants |
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27 | |
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28 | enum eps_cmd { |
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29 | eps_invalid = 0u, // invalid command |
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30 | |
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31 | // must be firsts (weak commands) |
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32 | eps_dig = 1u, // relative input eps |
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33 | eps_rel = 2u, // relative eps |
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34 | eps_abs = 4u, // absolute eps |
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35 | eps_equ = 8u, // equal string |
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36 | eps_ign = 16u, // ignore value |
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37 | |
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38 | // intermediate (in between commands) |
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39 | eps_omit = 32u, // omit indentifier |
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40 | |
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41 | // must be lasts (strong commands) |
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42 | eps_skip = 64u, // skip line |
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43 | eps_goto = 128u, // goto line |
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44 | eps_last, |
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45 | |
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46 | // unions |
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47 | eps_dra = eps_dig|eps_rel|eps_abs |
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48 | }; |
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49 | |
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50 | // ----- types |
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51 | |
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52 | struct eps { |
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53 | enum eps_cmd cmd; |
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54 | bool either; |
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55 | double dig, rel, abs; |
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56 | char tag[48]; |
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57 | }; |
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58 | |
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59 | struct constraint { |
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60 | struct slice row; |
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61 | struct slice col; |
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62 | struct eps eps; |
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63 | int line; |
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64 | }; |
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65 | |
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66 | // ----- interface |
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67 | |
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68 | #define T struct constraint |
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69 | |
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70 | static inline struct eps |
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71 | eps_init(enum eps_cmd cmd, double val) |
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72 | { |
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73 | ensure(cmd > eps_invalid && cmd < eps_last, "invalid eps command"); |
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74 | return (struct eps) { cmd, 0, cmd&eps_dig ? val : 0, cmd&eps_rel ? val : 0, cmd&eps_abs ? val : 0, {0} }; |
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75 | } |
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76 | |
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77 | static inline struct eps |
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78 | eps_initNum(enum eps_cmd cmd, bool either, double dig, double rel, double abs) |
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79 | { |
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80 | ensure(cmd > eps_invalid && cmd < eps_last, "invalid eps command"); |
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81 | return (struct eps) { cmd, either, dig, rel, abs, {0} }; |
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82 | } |
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83 | |
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84 | static inline struct eps |
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85 | eps_initTag(enum eps_cmd cmd, const char *tag) |
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86 | { |
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87 | ensure((cmd & eps_goto) || (cmd & eps_omit), "invalid eps goto or omit command"); |
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88 | struct eps eps = (struct eps) { .cmd = cmd }; |
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89 | enum { sz = sizeof eps.tag }; |
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90 | strncpy(eps.tag, tag, sz); eps.tag[sz-1] = 0; |
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91 | return eps; |
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92 | } |
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93 | |
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94 | static inline const char* |
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95 | eps_cstr(enum eps_cmd cmd) |
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96 | { |
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97 | extern const char * const eps_cmd_cstr[]; |
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98 | return cmd > eps_invalid && cmd < eps_last && eps_cmd_cstr[cmd] |
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99 | ? eps_cmd_cstr[cmd] |
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100 | : eps_cmd_cstr[eps_invalid]; |
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101 | } |
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102 | |
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103 | static inline T |
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104 | constraint_init(const struct slice row, const struct slice col, const struct eps eps, int line) |
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105 | { |
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106 | return (T){ row, col, eps, line }; |
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107 | } |
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108 | |
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109 | void constraint_print(const T* cst, FILE *out); |
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110 | void constraint_scan ( T* cst, FILE *in, int *row); |
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111 | |
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112 | #undef T |
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113 | |
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114 | #endif |
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115 | |
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