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4223
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1 #ifndef EXPR_H_
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2 #define EXPR_H_
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3
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4 #include "config.h"
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5 #include "Str.h"
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6 #include "op.h"
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7 #include "re.h"
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8 #include "stack.h"
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9 #include "strhash.h"
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10 #include "val.h"
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11 #include "variable.h"
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12
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13 #include <stddef.h>
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14 #include <setjmp.h>
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15
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16 enum t_expr {
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17 literE,
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18 varE,
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19 varhashE,
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20 symbolE,
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21 unopE,
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22 binopE,
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23 listE
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24 };
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25
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26 enum t_func {
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27 F_CALL = -1,
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28 F_NUL,
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29 F_ABS,
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30 F_ACOS,
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31 F_ASIN,
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32 F_ATAN,
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33 F_ATAN2,
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34 F_CATCH,
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35 F_CHR,
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36 F_COS,
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37 F_DEFINED,
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38 F_EOF,
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39 F_ERROR,
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40 F_EXP,
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41 F_FREEZE,
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42 F_GETC,
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43 F_GETENV,
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44 F_GETS,
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45 F_HANG,
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46 F_INT,
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47 F_IO,
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48 F_LENGTH,
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49 F_LOG,
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50 F_LOG10,
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51 F_LOWER,
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52 F_MATCH,
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53 F_MOEND,
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54 F_MOSTART,
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55 F_NEG,
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56 F_NOT,
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57 F_NUM,
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58 F_OPEN,
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59 F_OPENR,
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60 F_OPENW,
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61 F_ORD,
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62 F_QUOTE,
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63 F_RE_ESC,
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64 F_REMOVE,
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65 F_RENAME,
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66 F_REVERSE,
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67 F_SEEK,
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68 F_SIN,
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69 F_SQRT,
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70 F_STR,
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71 F_TAN,
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72 F_TELL,
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73 F_TYPEOF,
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74 F_UPPER
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75 };
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76
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77 enum t_symbol {
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78 S_NUL,
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79 S_ARG,
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80 S_ARGC,
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81 S_ARGV,
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82 S_ERR,
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83 S_EULER,
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84 S_LUDOLF,
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85 S_MATCH,
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86 S_RAND,
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87 S_RESULT,
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88 S_STDIN,
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89 S_STDOUT,
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90 S_STDERR
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91 };
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92
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93 enum t_binop {
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94 B_AMPERSAND,
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95 B_ANGLE,
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96 B_BACKSPARK,
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97 B_BRACELET,
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98 B_DOUBLE_OH_SEVEN,
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99 B_EMBRACE,
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100 B_FLATWORM,
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101 B_HALF_MESH,
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102 B_HYBRID,
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103 B_INTERSECTION,
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104 B_RIGHT_ANGLE,
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105 B_SHARK_FIN,
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106 B_SLAT,
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107 B_SPARK,
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108 B_SPARK_SPOT,
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109 B_SPIKE,
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110 B_SPLAT,
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111 B_SPOT,
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112 B_SQIGGLE,
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113 B_TAIL,
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114 B_TWO_SPOT,
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115 B_U_TURN,
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116 B_U_TURN_BACK,
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117 B_WORM,
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118 B_XMATCH
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119 };
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120
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121 struct expr {
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122 enum t_expr type;
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123 int op;
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124 union {
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125 t_vr_cookie tent;
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126 struct val *val;
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127 t_strhash *hash;
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128 } v;
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129 struct expr *right;
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130 union {
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131 struct expr *expr;
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132 struct op *op;
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133 t_regex *rx;
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134 size_t bonus;
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135 } left;
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136 };
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137
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138 void expr_init(void);
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139 void expr_end(void);
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140
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141 void free_expr(struct expr *);
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142 struct expr *get_expr(struct op *);
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143 struct expr *get_lval(struct op *);
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144 struct expr *get_iobj(struct op *);
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145
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146 void eval_push(struct expr *);
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147 void eval_into(struct expr *, struct val *);
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148 struct val *eval_pop(void);
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149 struct val *eval_expr(struct expr *);
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150
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151 ATTR_PURE
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152 enum t_binop expr_binop(int);
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153
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154 void expr_pp(enum t_binop, struct val *, struct val *);
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155
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156 typedef struct {
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157 jmp_buf buf;
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158 size_t depth;
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159 } t_context;
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160
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161 stack_declare(t_context, extern)
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162 extern stack(t_context) Context;
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163
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164 #define OPERATORS "_+-*/%^[]<>=!{}:;&|~`'.,"
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165 #define OPERATOR_P(c) strchr(OPERATORS, c)
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166
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167 #define TOLABEL(v) \
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168 do { \
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169 V_NUM(v); \
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170 V_xxx_OFF(v); \
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171 (v)->num = floor((v)->num + .5); \
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172 (v)->type = V_NUM_K; \
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173 v_ok_str(v); \
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174 ko_grep(v->ko, isdigit); \
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175 while (ko_at(v->ko, 0) == '0') { \
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176 ko_shift(v->ko, 1); \
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177 } \
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178 (v)->type = V_STR_K; \
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179 } while (0)
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180
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181 #endif /* EXPR_H_ */
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