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295
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1 /*
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2 lwcc/token.c
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3
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4 Copyright © 2013 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <stdlib.h>
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23
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24 #include <lw_alloc.h>
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25 #include <lw_string.h>
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26
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27 #include "token.h"
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28
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29 struct token *token_create(int ttype, char *strval, int row, int col, const char *fn)
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30 {
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31 struct token *t;
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32
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33 t = lw_alloc(sizeof(struct token));
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34 t -> ttype = ttype;
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35 if (strval)
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36 t -> strval = lw_strdup(strval);
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37 else
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38 strval = NULL;
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39 t -> lineno = row;
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40 t -> column = col;
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41 t -> fn = fn;
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42 t -> next = NULL;
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43 t -> prev = NULL;
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44 return t;
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45 }
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46
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47 void token_free(struct token *t)
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48 {
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49 lw_free(t -> strval);
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50 lw_free(t);
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51 }
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52
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53 struct token *token_dup(struct token *t)
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54 {
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55 struct token *t2;
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56
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57 t2 = lw_alloc(sizeof(struct token));
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58 (*t2) = (*t);
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59 t2 -> next = NULL;
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60 t2 -> prev = NULL;
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61 if (t -> strval)
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62 t2 -> strval = lw_strdup(t -> strval);
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63 return t2;
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64 }
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65
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66 static struct { int ttype; char *tstr; } tok_strs[] =
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67 {
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68 { TOK_WSPACE, " " },
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69 { TOK_EOL, "\n" },
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70 { TOK_DIV, "/" },
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71 { TOK_ADD, "+" },
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72 { TOK_SUB, "-" },
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73 { TOK_OPAREN, "(" },
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74 { TOK_CPAREN, ")" },
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75 { TOK_NE, "!=" },
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76 { TOK_EQ, "==" },
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77 { TOK_LE, "<=" },
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78 { TOK_LT, "<" },
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79 { TOK_GE, ">=" },
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80 { TOK_GT, ">" },
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81 { TOK_BAND, "&&" },
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82 { TOK_BOR, "||" },
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83 { TOK_BNOT, "!" },
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84 { TOK_MOD, "%"},
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85 { TOK_COMMA, "," },
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86 { TOK_ELLIPSIS, "..." },
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87 { TOK_QMARK, "?" },
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88 { TOK_COLON, ":" },
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89 { TOK_OBRACE, "{" },
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90 { TOK_CBRACE, "}" },
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91 { TOK_OSQUARE, "[" },
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92 { TOK_CSQUARE, "]" },
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93 { TOK_COM, "~" },
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94 { TOK_EOS, ";" },
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95 { TOK_HASH, "#" },
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96 { TOK_DBLHASH, "##" },
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97 { TOK_XOR, "^" },
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98 { TOK_XORASS, "^=" },
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99 { TOK_STAR, "*" },
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100 { TOK_MULASS, "*=" },
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101 { TOK_DIVASS, "/=" },
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102 { TOK_ASS, "=" },
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103 { TOK_MODASS, "%=" },
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104 { TOK_SUBASS, "-=" },
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105 { TOK_DBLSUB, "--" },
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106 { TOK_ADDASS, "+=" },
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107 { TOK_DBLADD, "++" },
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108 { TOK_BWAND, "&" },
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109 { TOK_BWANDASS, "&=" },
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110 { TOK_BWOR, "|" },
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111 { TOK_BWORASS, "|=" },
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112 { TOK_LSH, "<<" },
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113 { TOK_LSHASS, "<<=" },
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114 { TOK_RSH, ">>" },
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115 { TOK_RSHASS, ">>=" },
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116 { TOK_DOT, "." },
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117 { TOK_ARROW, "->" },
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118 { TOK_NONE, "" }
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119 };
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120
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121 void token_print(struct token *t, FILE *f)
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122 {
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123 int i;
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124 for (i = 0; tok_strs[i].ttype != TOK_NONE; i++)
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125 {
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126 if (tok_strs[i].ttype == t -> ttype)
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127 {
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128 fprintf(f, "%s", tok_strs[i].tstr);
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129 break;
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130 }
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131 }
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132 if (t -> strval)
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133 fprintf(f, "%s", t -> strval);
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134 }
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