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annotate lwasm/macro.c @ 435:5524649f4784

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Prevent parse errors when a macro definition is inside a conditional Allow macro definitions to be skipped properly when they are within a conditional construct that is being skipped.
author William Astle <lost@l-w.ca>
date Sat, 08 Apr 2017 21:44:39 -0600
parents 39490cf2d1c2
children a4a58c4c7a41
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 /*
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2 macro.c
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3 Copyright © 2008 William Astle
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4
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5 This file is part of LWASM.
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6
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7 LWASM is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 Contains stuff associated with macro processing
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21 */
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22
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23 #include <ctype.h>
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24 #include <stdlib.h>
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25 #include <string.h>
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26 #include <stdio.h>
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27
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28 #include <lw_alloc.h>
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29 #include <lw_string.h>
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30
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31 #include "lwasm.h"
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32 #include "input.h"
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33 #include "instab.h"
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34
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35 PARSEFUNC(pseudo_parse_macro)
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36 {
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37 macrotab_t *m;
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38 char *t;
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39 char tc;
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40
0
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41 l -> len = 0;
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42 l -> hideline = 1;
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43 if (as -> skipcond)
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44 {
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45 as -> skipmacro = 1;
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46 skip_operand(p);
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47 return;
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48 }
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49
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50 if (as -> inmacro)
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51 {
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52 lwasm_register_error(as, l, E_MACRO_RECURSE);
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53 return;
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54 }
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55
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56 if (!(l -> sym))
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57 {
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58 lwasm_register_error(as, l, E_MACRO_NONAME);
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59 return;
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60 }
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61
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62 for (m = as -> macros; m; m = m -> next)
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63 {
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64 if (!strcasecmp(m -> name, l -> sym))
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65 break;
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66 }
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67 if (m)
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68 {
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69 lwasm_register_error(as, l, E_MACRO_DUPE);
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70 return;
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71 }
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72
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73 m = lw_alloc(sizeof(macrotab_t));
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74 m -> name = lw_strdup(l -> sym);
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75 m -> next = as -> macros;
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76 m -> lines = NULL;
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77 m -> numlines = 0;
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78 m -> flags = 0;
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79 m -> definedat = l;
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80 as -> macros = m;
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81
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82 t = *p;
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83 while (**p && !isspace(**p))
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84 (*p)++;
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85 tc = **p;
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86 /* ignore unknown flags */
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87 if (strcasecmp(t, "noexpand") == 0)
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88 m -> flags |= macro_noexpand;
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89 **p = tc;
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90 as -> inmacro = 1;
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91 }
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92
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93 PARSEFUNC(pseudo_parse_endm)
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94 {
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95 l -> hideline = 1;
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96 l -> len = 0;
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97
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98 if (as -> skipcond)
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99 {
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100 as -> skipmacro = 0;
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101 return;
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102 }
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103
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104 if (!as -> inmacro)
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105 {
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106 lwasm_register_error(as, l, E_MACRO_ENDM);
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107 return;
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108 }
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109
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110 as -> inmacro = 0;
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111
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112 // a macro definition counts as a context break for local symbols
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113 as -> context = lwasm_next_context(as);
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114 }
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115
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116 // the current macro will ALWAYS be the first one in the table
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117 int add_macro_line(asmstate_t *as, char *optr)
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118 {
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119 if (!as -> inmacro)
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120 return 0;
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121
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122 as -> macros -> lines = lw_realloc(as -> macros -> lines, sizeof(char *) * (as -> macros -> numlines + 1));
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123 as -> macros -> lines[as -> macros -> numlines] = lw_strdup(optr);
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124 as -> macros -> numlines += 1;
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125 return 1;
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126 }
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127
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128 void macro_add_to_buff(char **buff, int *loc, int *len, char c)
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129 {
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130 if (*loc == *len)
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131 {
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132 *buff = lw_realloc(*buff, *len + 32);
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133 *len += 32;
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134 }
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135 (*buff)[(*loc)++] = c;
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136 }
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137
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138 // this is just like a regular operation function
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
139 /*
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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140 macro args are referenced by "\n" where 1 <= n <= 9
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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141 or by "\{n}"; a \ can be included by writing \\
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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142 a comma separates argument but one can be included with "\,"
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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143 whitespace ends argument list but can be included with "\ " or the like
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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144
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
145 */
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
146 int expand_macro(asmstate_t *as, line_t *l, char **p, char *opc)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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147 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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148 int lc;
2
7317fbe024af Clean up insane number of compiler warnings under -Wall
lost@l-w.ca
parents: 0
diff changeset
149 line_t *cl; //, *nl;
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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150 int oldcontext;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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151 macrotab_t *m;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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152
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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153 char **args = NULL; // macro arguments
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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154 int nargs = 0; // number of arguments
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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155
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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156 char *p2, *p3;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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157
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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158 int bloc, blen;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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159 char *linebuff;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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160
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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161 for (m = as -> macros; m; m = m -> next)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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162 {
372
39490cf2d1c2 Make macro names case insensitive
William Astle <lost@l-w.ca>
parents: 370
diff changeset
163 if (!strcasecmp(opc, m -> name))
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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164 break;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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165 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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166 // signal no macro expansion
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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167 if (!m)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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168 return -1;
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169
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170 // save current symbol context for after macro expansion
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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171 oldcontext = as -> context;
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172
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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173 cl = l;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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174
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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175 as -> context = lwasm_next_context(as);
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176
39
23b01aa3ecf9 Fixed missing NUL termination in macro expansion
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diff changeset
177 while (**p && !isspace(**p) && **p)
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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178 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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179 p2 = *p;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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180 while (*p2 && !isspace(*p2) && *p2 != ',')
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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181 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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182 if (*p2 == '\\')
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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183 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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184 if (p2[1])
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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185 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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186 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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187 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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188 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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189
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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190 // have arg here
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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191 args = lw_realloc(args, sizeof(char *) * (nargs + 1));
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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192 args[nargs] = lw_alloc(p2 - *p + 1);
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193 args[nargs][p2 - *p] = '\0';
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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194 memcpy(args[nargs], *p, p2 - *p);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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195 *p = p2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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196
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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197 // now collapse out "\" characters
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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198 for (p3 = p2 = args[nargs]; *p2; p2++, p3++)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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199 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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200 if (*p2 == '\\' && p2[1])
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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201 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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202 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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203 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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204 *p3 = *p2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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205 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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206 *p3 = '\0';
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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207
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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208 nargs++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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209 if (**p == ',')
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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210 (*p)++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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211 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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212
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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213
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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214 // now create a string for the macro
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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215 // and push it into the front of the input stack
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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216 bloc = blen = 0;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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217 linebuff = NULL;
49
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
218
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
219 if (m -> flags & macro_noexpand)
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
220 {
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
221 char ctcbuf[100];
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
222 char *p;
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
223 snprintf(ctcbuf, 100, "\001\001SETNOEXPANDSTART\n");
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
224 for (p = ctcbuf; *p; p++)
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
225 macro_add_to_buff(&linebuff, &bloc, &blen, *p);
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
226 }
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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parents: 40
diff changeset
227
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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228
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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229 for (lc = 0; lc < m -> numlines; lc++)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
230 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
231 for (p2 = m -> lines[lc]; *p2; p2++)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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232 {
57
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
233 if (*p2 == '\\' && p2[1] == '*')
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
234 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
235 int n;
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
236 /* all arguments */
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
237 for (n = 0; n < nargs; n++)
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
238 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
239 for (p3 = args[n]; *p3; p3++)
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
240 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
241 macro_add_to_buff(&linebuff, &bloc, &blen, *p3);
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
242 }
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
243 if (n != (nargs -1))
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
244 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
245 macro_add_to_buff(&linebuff, &bloc, &blen, ',');
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
246 }
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
247 }
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
248 p2++;
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
249 }
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
250 else if (*p2 == '\\' && isdigit(p2[1]))
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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251 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
252 int n;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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253
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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254 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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255 n = *p2 - '0';
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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256 if (n == 0)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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257 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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258 for (p3 = m -> name; *p3; p3++)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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259 macro_add_to_buff(&linebuff, &bloc, &blen, *p3);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
260 continue;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
261 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
262 if (n < 1 || n > nargs)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
263 continue;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
264 for (p3 = args[n - 1]; *p3; p3++)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
265 macro_add_to_buff(&linebuff, &bloc, &blen, *p3);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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266 continue;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
267 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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268 else if (*p2 == '{')
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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269 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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270 int n = 0, n2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
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diff changeset
271 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
lost@l-w.ca
parents:
diff changeset
272 while (*p2 && isdigit(*p2))
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
273 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
274 n2 = *p2 - '0';
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
275 if (n2 < 0 || n2 > 9)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
276 n2 = 0;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
277 n = n * 10 + n2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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278 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
279 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
280 if (*p2 == '}')
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281 p2++;
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282
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283 if (n == 0)
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284 {
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285 for (p3 = m -> name; *p3; p3++)
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286 macro_add_to_buff(&linebuff, &bloc, &blen, *p3);
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287 continue;
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288 }
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289 if (n < 1 || n > nargs)
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290 continue;
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291 for (p3 = args[n - 1]; *p3; p3++)
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292 macro_add_to_buff(&linebuff, &bloc, &blen, *p3);
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293 continue;
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294 }
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295 else
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296 {
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297 macro_add_to_buff(&linebuff, &bloc, &blen, *p2);
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298 }
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299 }
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300
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301 macro_add_to_buff(&linebuff, &bloc, &blen, '\n');
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302
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303 }
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304
49
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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305 if (m -> flags & macro_noexpand)
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306 {
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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307 char ctcbuf[100];
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308 char *p;
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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309 snprintf(ctcbuf, 100, "\001\001SETNOEXPANDEND\n");
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310 for (p = ctcbuf; *p; p++)
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311 macro_add_to_buff(&linebuff, &bloc, &blen, *p);
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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312 }
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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313
0
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314 {
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315 char ctcbuf[100];
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316 char *p;
40
d96037ea0b80 Fixed line number counting being broken by macros
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317 snprintf(ctcbuf, 100, "\001\001SETCONTEXT %d\n\001\001SETLINENO %d\n", oldcontext, cl -> lineno + 1);
0
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318 for (p = ctcbuf; *p; p++)
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319 macro_add_to_buff(&linebuff, &bloc, &blen, *p);
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320 }
39
23b01aa3ecf9 Fixed missing NUL termination in macro expansion
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321 macro_add_to_buff(&linebuff, &bloc, &blen, 0);
0
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322
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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323 // push the macro into the front of the stream
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324 input_openstring(as, opc, linebuff);
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325 lw_free(linebuff);
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326
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327 // clean up
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328 if (args)
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329 {
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330 while (nargs)
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331 {
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332 lw_free(args[--nargs]);
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333 }
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334 lw_free(args);
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335 }
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336
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337 // indicate a macro was expanded
219
afd50d6b4113 Add --preprocess option
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diff changeset
338 l -> hideline = 1;
0
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339 return 0;
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340 }