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annotate lwasm/macro.c @ 49:bd8b3fbd1e28

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Added ability to flag macros as "noexpand" so they are not expanded in the listing
author lost@l-w.ca
date Tue, 05 Apr 2011 00:06:28 -0600
parents d96037ea0b80
children e2728091b75a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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
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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, "Attempt to define a macro inside a macro");
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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, "Missing macro name");
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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 (!strcmp(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, "Duplicate macro definition");
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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;
0
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78 as -> macros = m;
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79
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80 t = *p;
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81 while (**p && !isspace(**p))
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82 (*p)++;
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83 tc = **p;
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84 /* ignore unknown flags */
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85 if (strcasecmp(t, "noexpand") == 0)
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86 m -> flags |= macro_noexpand;
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87 **p = tc;
0
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88 as -> inmacro = 1;
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89 }
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90
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91 PARSEFUNC(pseudo_parse_endm)
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92 {
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93 l -> len = 0;
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94
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95 if (as -> skipcond)
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96 {
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97 as -> skipmacro = 0;
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98 return;
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99 }
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100
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101 if (!as -> inmacro)
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102 {
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103 lwasm_register_error(as, l, "ENDM without MACRO");
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104 return;
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105 }
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106
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107 as -> inmacro = 0;
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108
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109 // a macro definition counts as a context break for local symbols
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110 as -> context = lwasm_next_context(as);
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111 }
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112
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113 // the current macro will ALWAYS be the first one in the table
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114 int add_macro_line(asmstate_t *as, char *optr)
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115 {
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116 if (!as -> inmacro)
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117 return 0;
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118
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119 as -> macros -> lines = lw_realloc(as -> macros -> lines, sizeof(char *) * (as -> macros -> numlines + 1));
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120 as -> macros -> lines[as -> macros -> numlines] = lw_strdup(optr);
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121 as -> macros -> numlines += 1;
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122 return 1;
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123 }
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124
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125 void macro_add_to_buff(char **buff, int *loc, int *len, char c)
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126 {
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127 if (*loc == *len)
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128 {
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129 *buff = lw_realloc(*buff, *len + 32);
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130 *len += 32;
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131 }
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132 (*buff)[(*loc)++] = c;
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133 }
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134
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135 // this is just like a regular operation function
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136 /*
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137 macro args are referenced by "\n" where 1 <= n <= 9
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138 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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139 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
140 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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141
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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142 */
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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143 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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144 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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145 int lc;
2
7317fbe024af Clean up insane number of compiler warnings under -Wall
lost@l-w.ca
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diff changeset
146 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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147 int oldcontext;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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148 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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149
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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150 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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151 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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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 *p2, *p3;
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 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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156 char *linebuff;
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 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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159 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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160 if (!strcmp(opc, m -> name))
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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161 break;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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162 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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163 // 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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164 if (!m)
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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165 return -1;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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166
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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167 // 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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168 oldcontext = as -> context;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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169
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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170 cl = l;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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171
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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172 as -> context = lwasm_next_context(as);
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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173
39
23b01aa3ecf9 Fixed missing NUL termination in macro expansion
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diff changeset
174 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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175 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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176 p2 = *p;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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177 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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178 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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179 if (*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[1])
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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182 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 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
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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187 // 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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188 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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189 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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190 args[nargs][p2 - *p] = '\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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191 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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192 *p = p2;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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193
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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194 // now collapse out "\" characters
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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195 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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196 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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197 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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diff changeset
198 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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199 p2++;
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 *p3 = *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 = '\0';
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 nargs++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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206 if (**p == ',')
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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207 (*p)++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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208 }
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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209
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 // 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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212 // 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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213 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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214 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
215
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
216 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
217 {
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
218 char ctcbuf[100];
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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219 char *p;
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
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diff changeset
220 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
221 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
222 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
223 }
bd8b3fbd1e28 Added ability to flag macros as "noexpand" so they are not expanded in the listing
lost@l-w.ca
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diff changeset
224
0
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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225
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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226 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
227 {
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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228 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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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 if (*p2 == '\\' && isdigit(p2[1]))
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
231 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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diff changeset
232 int n;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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233
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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234 p2++;
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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235 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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diff changeset
236 if (n == 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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diff changeset
237 {
2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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238 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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239 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
240 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
241 }
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
242 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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243 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
244 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
245 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
246 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
247 }
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
248 else if (*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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249 {
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
250 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
251 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
252 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
253 {
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
254 n2 = *p2 - '0';
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
255 if (n2 < 0 || n2 > 9)
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
256 n2 = 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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diff changeset
257 n = n * 10 + 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
258 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
259 }
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
260 if (*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
261 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
262
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
263 if (n == 0)
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
264 {
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
265 for (p3 = m -> name; *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
266 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
parents:
diff changeset
267 continue;
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
268 }
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
269 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
parents:
diff changeset
270 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
271 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
272 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
parents:
diff changeset
273 continue;
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
274 }
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
275 else
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
276 {
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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277 macro_add_to_buff(&linebuff, &bloc, &blen, *p2);
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278 }
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279 }
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280
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281 macro_add_to_buff(&linebuff, &bloc, &blen, '\n');
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282
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283 }
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284
49
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285 if (m -> flags & macro_noexpand)
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286 {
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287 char ctcbuf[100];
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288 char *p;
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289 snprintf(ctcbuf, 100, "\001\001SETNOEXPANDEND\n");
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290 for (p = ctcbuf; *p; p++)
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291 macro_add_to_buff(&linebuff, &bloc, &blen, *p);
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292 }
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293
0
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294 {
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295 char ctcbuf[100];
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296 char *p;
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297 snprintf(ctcbuf, 100, "\001\001SETCONTEXT %d\n\001\001SETLINENO %d\n", oldcontext, cl -> lineno + 1);
0
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298 for (p = ctcbuf; *p; p++)
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299 macro_add_to_buff(&linebuff, &bloc, &blen, *p);
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300 }
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301 macro_add_to_buff(&linebuff, &bloc, &blen, 0);
0
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302
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303 // push the macro into the front of the stream
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304 input_openstring(as, opc, linebuff);
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305 lw_free(linebuff);
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306
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307 // clean up
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308 if (args)
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309 {
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310 while (nargs)
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311 {
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312 lw_free(args[--nargs]);
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313 }
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314 lw_free(args);
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315 }
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316
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317 // indicate a macro was expanded
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318 return 0;
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319 }