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annotate lwcc/symbol.c @ 314:a3e277c58df9 ccdev
Checkpoint parser development for lwcc
Beginning of lemon based parser for C including all the infrastructure for
calling the lemon generated parser. This requires a translation layer from
the preprocessor token numbers to the lemon parser token numbers due to the
fact that lemon wants to control the token numbers. Eventually when the
lemon parser gets replaced with a hand crafted recursive descent parser,
this translation will no longer be required. However, in the interest of
getting things working sooner rather than later, using something like lemon
is beneficial.
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Sun, 17 Nov 2013 11:59:36 -0700 |
| parents | 54f213c8fb81 |
| children |
| rev | line source |
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| 296 | 1 /* |
| 2 lwcc/symbol.c | |
| 3 | |
| 4 Copyright © 2013 William Astle | |
| 5 | |
| 6 This file is part of LWTOOLS. | |
| 7 | |
| 8 LWTOOLS is free software: you can redistribute it and/or modify it under the | |
| 9 terms of the GNU General Public License as published by the Free Software | |
| 10 Foundation, either version 3 of the License, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 This program is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 16 more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License along with | |
| 19 this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 */ | |
| 21 | |
| 22 #include <string.h> | |
| 23 | |
| 24 #include <lw_alloc.h> | |
| 25 #include <lw_string.h> | |
| 26 | |
| 27 #include "cpp.h" | |
| 28 #include "symbol.h" | |
| 29 #include "token.h" | |
| 30 | |
| 31 void symbol_free(struct symtab_e *s) | |
| 32 { | |
| 33 int i; | |
|
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34 |
| 296 | 35 lw_free(s -> name); |
| 36 | |
| 37 for (i = 0; i < s -> nargs; i++) | |
| 38 lw_free(s -> params[i]); | |
| 39 lw_free(s -> params); | |
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40 token_list_destroy(s -> tl); |
| 296 | 41 } |
| 42 | |
| 43 struct symtab_e *symtab_find(struct preproc_info *pp, char *name) | |
| 44 { | |
| 45 struct symtab_e *s; | |
| 46 | |
| 47 for (s = pp -> sh; s; s = s -> next) | |
| 48 { | |
| 49 if (strcmp(s -> name, name) == 0) | |
| 50 { | |
| 51 return s; | |
| 52 } | |
| 53 } | |
| 54 return NULL; | |
| 55 } | |
| 56 | |
| 57 void symtab_undef(struct preproc_info *pp, char *name) | |
| 58 { | |
| 59 struct symtab_e *s, **p; | |
| 60 | |
| 61 p = &(pp -> sh); | |
| 62 for (s = pp -> sh; s; s = s -> next) | |
| 63 { | |
| 64 if (strcmp(s -> name, name) == 0) | |
| 65 { | |
| 66 (*p) -> next = s -> next; | |
| 67 symbol_free(s); | |
| 68 return; | |
| 69 } | |
| 70 p = &((*p) -> next); | |
| 71 } | |
| 72 } | |
| 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) |
| 296 | 75 { |
| 76 struct symtab_e *s; | |
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77 int i; |
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78 |
| 296 | 79 s = lw_alloc(sizeof(struct symtab_e)); |
| 80 s -> name = lw_strdup(name); | |
| 81 s -> tl = def; | |
| 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 } |
| 296 | 90 s -> vargs = vargs; |
| 91 s -> next = pp -> sh; | |
| 92 pp -> sh = s; | |
| 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 } |