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annotate lwcc/symbol.c @ 551:4ec5c94ade71

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Added tag lwtools-4.21 for changeset c71c80a3b280
author William Astle <lost@l-w.ca>
date Sun, 23 Apr 2023 10:23:43 -0600
parents 54f213c8fb81
children
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1 /*
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2 lwcc/symbol.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 <string.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 "cpp.h"
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28 #include "symbol.h"
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29 #include "token.h"
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30
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31 void symbol_free(struct symtab_e *s)
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32 {
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33 int i;
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34
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35 lw_free(s -> name);
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36
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37 for (i = 0; i < s -> nargs; i++)
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38 lw_free(s -> params[i]);
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39 lw_free(s -> params);
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40 token_list_destroy(s -> tl);
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41 }
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42
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43 struct symtab_e *symtab_find(struct preproc_info *pp, char *name)
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44 {
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45 struct symtab_e *s;
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46
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47 for (s = pp -> sh; s; s = s -> next)
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48 {
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49 if (strcmp(s -> name, name) == 0)
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50 {
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51 return s;
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52 }
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53 }
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54 return NULL;
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55 }
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56
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57 void symtab_undef(struct preproc_info *pp, char *name)
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58 {
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59 struct symtab_e *s, **p;
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60
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61 p = &(pp -> sh);
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62 for (s = pp -> sh; s; s = s -> next)
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63 {
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64 if (strcmp(s -> name, name) == 0)
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65 {
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66 (*p) -> next = s -> next;
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67 symbol_free(s);
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68 return;
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69 }
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70 p = &((*p) -> next);
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71 }
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72 }
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73
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74 void symtab_define(struct preproc_info *pp, char *name, struct token_list *def, int nargs, char **params, int vargs)
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75 {
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76 struct symtab_e *s;
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77 int i;
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78
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79 s = lw_alloc(sizeof(struct symtab_e));
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80 s -> name = lw_strdup(name);
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81 s -> tl = def;
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82 s -> nargs = nargs;
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83 s -> params = NULL;
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84 if (params)
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85 {
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86 s -> params = lw_alloc(sizeof(char *) * nargs);
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87 for (i = 0; i < nargs; i++)
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88 s -> params[i] = lw_strdup(params[i]);
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89 }
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90 s -> vargs = vargs;
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91 s -> next = pp -> sh;
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92 pp -> sh = s;
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93 }
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94
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95 void symtab_dump(struct preproc_info *pp)
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96 {
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97 struct symtab_e *s;
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98 struct token *t;
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99 int i;
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100
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101 for (s = pp -> sh; s; s = s -> next)
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102 {
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103 printf("%s", s -> name);
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104 if (s -> nargs >= 0)
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105 {
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106 printf("(");
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107 for (i = 0; i < s -> nargs; i++)
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108 {
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109 if (i)
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110 printf(",");
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111 printf("%s", s -> params[i]);
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112 }
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113 if (s -> vargs)
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114 {
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115 if (s -> nargs)
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116 printf(",");
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117 printf("...");
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118 }
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119 printf(")");
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120 }
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121 printf(" => ");
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122 if (s -> tl)
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123 {
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124 for (t = s -> tl -> head; t; t = t -> next)
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125 {
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126 token_print(t, stdout);
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127 }
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128 }
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129 printf("\n");
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130 }
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131 }