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annotate lwasm/macro.c @ 384:6ee9c67a0f8d

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Add conditional for testing if a pragma is in effect An obvious addition that took someone else to notice... Thanks to Erik G <erik@6809.org> for the patch.
author William Astle <lost@l-w.ca>
date Mon, 13 Jul 2015 21:20:30 -0600
parents 39490cf2d1c2
children 5524649f4784
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 return;
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47 }
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48
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49 if (as -> inmacro)
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50 {
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51 lwasm_register_error(as, l, E_MACRO_RECURSE);
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52 return;
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53 }
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54
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55 if (!(l -> sym))
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56 {
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57 lwasm_register_error(as, l, E_MACRO_NONAME);
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58 return;
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59 }
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60
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61 for (m = as -> macros; m; m = m -> next)
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62 {
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63 if (!strcasecmp(m -> name, l -> sym))
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64 break;
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65 }
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66 if (m)
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67 {
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68 lwasm_register_error(as, l, E_MACRO_DUPE);
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69 return;
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70 }
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71
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72 m = lw_alloc(sizeof(macrotab_t));
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73 m -> name = lw_strdup(l -> sym);
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74 m -> next = as -> macros;
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75 m -> lines = NULL;
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76 m -> numlines = 0;
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77 m -> flags = 0;
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78 m -> definedat = l;
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79 as -> macros = m;
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80
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81 t = *p;
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82 while (**p && !isspace(**p))
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83 (*p)++;
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84 tc = **p;
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85 /* ignore unknown flags */
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86 if (strcasecmp(t, "noexpand") == 0)
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87 m -> flags |= macro_noexpand;
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88 **p = tc;
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89 as -> inmacro = 1;
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90 }
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91
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92 PARSEFUNC(pseudo_parse_endm)
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93 {
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94 l -> hideline = 1;
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95 l -> len = 0;
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96
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97 if (as -> skipcond)
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98 {
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99 as -> skipmacro = 0;
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100 return;
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101 }
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102
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103 if (!as -> inmacro)
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104 {
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105 lwasm_register_error(as, l, E_MACRO_ENDM);
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106 return;
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107 }
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108
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109 as -> inmacro = 0;
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110
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111 // a macro definition counts as a context break for local symbols
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112 as -> context = lwasm_next_context(as);
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113 }
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114
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115 // the current macro will ALWAYS be the first one in the table
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116 int add_macro_line(asmstate_t *as, char *optr)
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117 {
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118 if (!as -> inmacro)
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119 return 0;
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120
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121 as -> macros -> lines = lw_realloc(as -> macros -> lines, sizeof(char *) * (as -> macros -> numlines + 1));
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122 as -> macros -> lines[as -> macros -> numlines] = lw_strdup(optr);
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123 as -> macros -> numlines += 1;
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124 return 1;
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125 }
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126
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127 void macro_add_to_buff(char **buff, int *loc, int *len, char c)
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128 {
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129 if (*loc == *len)
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130 {
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131 *buff = lw_realloc(*buff, *len + 32);
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132 *len += 32;
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133 }
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134 (*buff)[(*loc)++] = c;
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135 }
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136
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137 // this is just like a regular operation function
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diff changeset
138 /*
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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139 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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140 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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diff changeset
141 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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diff changeset
142 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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diff changeset
143
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
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 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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146 {
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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147 int lc;
2
7317fbe024af Clean up insane number of compiler warnings under -Wall
lost@l-w.ca
parents: 0
diff changeset
148 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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149 int oldcontext;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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150 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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151
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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152 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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153 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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154
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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155 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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156
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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157 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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158 char *linebuff;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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159
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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160 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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161 {
372
39490cf2d1c2 Make macro names case insensitive
William Astle <lost@l-w.ca>
parents: 370
diff changeset
162 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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163 break;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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164 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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165 // 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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166 if (!m)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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167 return -1;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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168
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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169 // 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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170 oldcontext = as -> context;
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171
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172 cl = l;
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173
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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174 as -> context = lwasm_next_context(as);
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175
39
23b01aa3ecf9 Fixed missing NUL termination in macro expansion
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diff changeset
176 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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177 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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178 p2 = *p;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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179 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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180 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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181 if (*p2 == '\\')
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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182 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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183 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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184 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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185 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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186 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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187 }
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 // 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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190 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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191 args[nargs] = lw_alloc(p2 - *p + 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][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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193 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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194 *p = p2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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195
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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196 // 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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197 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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198 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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199 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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200 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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201 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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202 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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203 *p3 = *p2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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204 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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205 *p3 = '\0';
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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206
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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207 nargs++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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208 if (**p == ',')
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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209 (*p)++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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210 }
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 // 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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214 // 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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215 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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216 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
217
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
218 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
219 {
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
220 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
221 char *p;
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
222 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
223 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
224 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
225 }
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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parents: 40
diff changeset
226
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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227
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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228 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
229 {
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
230 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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231 {
57
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
232 if (*p2 == '\\' && p2[1] == '*')
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
233 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
234 int n;
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
235 /* all arguments */
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
236 for (n = 0; n < nargs; n++)
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
237 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
238 for (p3 = args[n]; *p3; p3++)
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
239 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
240 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
241 }
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
242 if (n != (nargs -1))
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
243 {
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
244 macro_add_to_buff(&linebuff, &bloc, &blen, ',');
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
245 }
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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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 p2++;
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
lost@l-w.ca
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diff changeset
248 }
e2728091b75a Added a \* macro parameter expansion to include all macro parameters
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diff changeset
249 else if (*p2 == '\\' && isdigit(p2[1]))
0
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250 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
251 int n;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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252
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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253 p2++;
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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254 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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255 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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diff changeset
256 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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257 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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diff changeset
258 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
lost@l-w.ca
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diff changeset
259 continue;
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 }
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 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
262 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
263 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
264 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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265 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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266 }
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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267 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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268 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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269 int n = 0, n2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
270 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
271 while (*p2 && isdigit(*p2))
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
272 {
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 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
274 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
275 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
276 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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diff changeset
277 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
278 }
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 if (*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
280 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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281
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282 if (n == 0)
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283 {
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284 for (p3 = m -> name; *p3; p3++)
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285 macro_add_to_buff(&linebuff, &bloc, &blen, *p3);
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286 continue;
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287 }
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288 if (n < 1 || n > nargs)
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289 continue;
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290 for (p3 = args[n - 1]; *p3; p3++)
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291 macro_add_to_buff(&linebuff, &bloc, &blen, *p3);
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292 continue;
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293 }
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294 else
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295 {
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296 macro_add_to_buff(&linebuff, &bloc, &blen, *p2);
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297 }
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298 }
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299
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300 macro_add_to_buff(&linebuff, &bloc, &blen, '\n');
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301
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302 }
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303
49
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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304 if (m -> flags & macro_noexpand)
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305 {
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306 char ctcbuf[100];
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307 char *p;
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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308 snprintf(ctcbuf, 100, "\001\001SETNOEXPANDEND\n");
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309 for (p = ctcbuf; *p; p++)
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310 macro_add_to_buff(&linebuff, &bloc, &blen, *p);
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311 }
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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312
0
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313 {
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314 char ctcbuf[100];
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315 char *p;
40
d96037ea0b80 Fixed line number counting being broken by macros
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316 snprintf(ctcbuf, 100, "\001\001SETCONTEXT %d\n\001\001SETLINENO %d\n", oldcontext, cl -> lineno + 1);
0
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317 for (p = ctcbuf; *p; p++)
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318 macro_add_to_buff(&linebuff, &bloc, &blen, *p);
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319 }
39
23b01aa3ecf9 Fixed missing NUL termination in macro expansion
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320 macro_add_to_buff(&linebuff, &bloc, &blen, 0);
0
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321
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322 // push the macro into the front of the stream
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323 input_openstring(as, opc, linebuff);
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324 lw_free(linebuff);
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325
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326 // clean up
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327 if (args)
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328 {
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329 while (nargs)
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330 {
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331 lw_free(args[--nargs]);
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332 }
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333 lw_free(args);
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334 }
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335
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336 // indicate a macro was expanded
219
afd50d6b4113 Add --preprocess option
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337 l -> hideline = 1;
0
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338 return 0;
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339 }