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annotate lwasm/lwasm.c @ 372:90de73ba0cac

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Created a useful debug framework and adjusted lw_expr_print() to return a "static" dynamic string
author lost@starbug
date Thu, 22 Apr 2010 18:19:06 -0600
parents 9c24d9d485b9
children d99322ef6f21
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1 /*
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2 lwasm.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
344
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22 #define ___lwasm_c_seen___
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23
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24 #include <config.h>
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25
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26 #include <stdio.h>
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27 #include <stdarg.h>
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28 #include <string.h>
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29
337
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30 #include <lw_expr.h>
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31 #include <lw_alloc.h>
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32 #include <lw_string.h>
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33
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34 #include "lwasm.h"
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35
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36 void lwasm_register_error(asmstate_t *as, line_t *l, const char *msg, ...);
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37
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38 lw_expr_t lwasm_evaluate_var(char *var, void *priv)
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39 {
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40 asmstate_t *as = (asmstate_t *)priv;
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41 lw_expr_t e;
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42 importlist_t *im;
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43 struct symtabe *s;
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44
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45 s = lookup_symbol(as, as -> cl, var);
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46 if (s)
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47 {
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48 e = lw_expr_build(lw_expr_type_special, lwasm_expr_syment, s);
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49 return e;
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50 }
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51
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52 // undefined here is undefied unless output is object
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53 if (as -> output_format != OUTPUT_OBJ)
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54 goto nomatch;
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55
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56 // check for import
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57 for (im = as -> importlist; im; im = im -> next)
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58 {
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59 if (!strcmp(im -> symbol, var))
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60 break;
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61 }
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62
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63 // check for "undefined" to import automatically
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64 if (!im && CURPRAGMA(as -> cl, PRAGMA_UNDEFEXTERN))
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65 {
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66 im = lw_alloc(sizeof(importlist_t));
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67 im -> symbol = lw_strdup(var);
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68 im -> next = as -> importlist;
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69 as -> importlist = im;
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70 }
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71
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72 if (!im)
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73 goto nomatch;
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74
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75 e = lw_expr_build(lw_expr_type_special, lwasm_expr_import, im);
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76 return e;
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77
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78 nomatch:
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79 if (as -> badsymerr)
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80 {
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81 lwasm_register_error(as, as -> cl, "Undefined symbol %s", var);
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82 }
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83 return NULL;
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84 }
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85
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86 lw_expr_t lwasm_evaluate_special(int t, void *ptr, void *priv)
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87 {
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88 switch (t)
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89 {
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90 case lwasm_expr_linelen:
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91 {
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92 line_t *cl = ptr;
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93 if (cl -> len == -1)
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94 return NULL;
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95 return lw_expr_build(lw_expr_type_int, cl -> len);
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96 }
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97 break;
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98
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99 case lwasm_expr_lineaddr:
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100 {
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101 line_t *cl = ptr;
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102 if (cl -> addr)
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103 return lw_expr_copy(cl -> addr);
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104 else
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105 return NULL;
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106 }
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107
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108 case lwasm_expr_syment:
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109 {
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110 struct symtabe *sym = ptr;
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111 return lw_expr_copy(sym -> value);
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112 }
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113
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114 case lwasm_expr_import:
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115 {
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116 return NULL;
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117 }
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118
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119 case lwasm_expr_nextbp:
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120 {
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121 return NULL;
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122 }
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123
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124 case lwasm_expr_prevbp:
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125 {
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126 return NULL;
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127 }
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128 }
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129 return NULL;
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130 }
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131
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132 void lwasm_register_error(asmstate_t *as, line_t *l, const char *msg, ...)
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133 {
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134 lwasm_error_t *e;
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135 va_list args;
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136 char errbuff[1024];
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137 int r;
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138
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139 if (!l)
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140 return;
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141
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142 va_start(args, msg);
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143
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144 e = lw_alloc(sizeof(lwasm_error_t));
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145
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146 e -> next = l -> err;
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147 l -> err = e;
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148
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149 as -> errorcount++;
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150
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151 r = vsnprintf(errbuff, 1024, msg, args);
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152 e -> mess = lw_strdup(errbuff);
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153
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154 va_end(args);
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155 }
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156
351
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157 void lwasm_register_warning(asmstate_t *as, line_t *l, const char *msg, ...)
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158 {
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159 lwasm_error_t *e;
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160 va_list args;
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161 char errbuff[1024];
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162 int r;
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163
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164 if (!l)
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165 return;
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166
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167 va_start(args, msg);
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168
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169 e = lw_alloc(sizeof(lwasm_error_t));
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170
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171 e -> next = l -> err;
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172 l -> err = e;
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173
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174 as -> errorcount++;
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175
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176 r = vsnprintf(errbuff, 1024, msg, args);
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177 e -> mess = lw_strdup(errbuff);
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178
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179 va_end(args);
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180 }
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181
345
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182 int lwasm_next_context(asmstate_t *as)
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183 {
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184 int r;
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185 r = as -> nextcontext;
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186 as -> nextcontext++;
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187 return r;
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188 }
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189
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190 void lwasm_emit(line_t *cl, int byte)
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parents: 345
diff changeset
191 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
192 if (cl -> outputl == cl -> outputbl)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
193 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
194 cl -> output = lw_realloc(cl -> output, cl -> outputbl + 8);
a82c55070624 Added expression parsing infrastructure and misc fixes
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diff changeset
195 cl -> outputbl += 8;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
196 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
197 cl -> output[cl -> outputl++] = byte & 0xff;
354
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
198
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
199 if (cl -> inmod)
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
200 {
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
201 asmstate_t *as = cl -> as;
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
202 // update module CRC
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
203 // this is a direct transliteration from the nitros9 asm source
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
204 // to C; it can, no doubt, be optimized for 32 bit processing
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
205 byte &= 0xff;
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
206
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
207 byte ^= (as -> crc)[0];
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
208 (as -> crc)[0] = (as -> crc)[1];
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
209 (as -> crc)[1] = (as -> crc)[2];
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
210 (as -> crc)[1] ^= (byte >> 7);
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
211 (as -> crc)[2] = (byte << 1);
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
212 (as -> crc)[1] ^= (byte >> 2);
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
213 (as -> crc)[2] ^= (byte << 6);
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
214 byte ^= (byte << 1);
60568b123281 Added os9 opcodes and ERROR
lost@starbug
parents: 351
diff changeset
215 byte ^= (byte << 2);
60568b123281 Added os9 opcodes and ERROR
lost@starbug
parents: 351
diff changeset
216 byte ^= (byte << 4);
60568b123281 Added os9 opcodes and ERROR
lost@starbug
parents: 351
diff changeset
217 if (byte & 0x80)
60568b123281 Added os9 opcodes and ERROR
lost@starbug
parents: 351
diff changeset
218 {
60568b123281 Added os9 opcodes and ERROR
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parents: 351
diff changeset
219 (as -> crc)[0] ^= 0x80;
60568b123281 Added os9 opcodes and ERROR
lost@starbug
parents: 351
diff changeset
220 (as -> crc)[2] ^= 0x21;
60568b123281 Added os9 opcodes and ERROR
lost@starbug
parents: 351
diff changeset
221 }
60568b123281 Added os9 opcodes and ERROR
lost@starbug
parents: 351
diff changeset
222 }
346
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
223 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
224
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
225 void lwasm_emitop(line_t *cl, int opc)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
226 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
227 if (opc > 0x100)
a82c55070624 Added expression parsing infrastructure and misc fixes
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diff changeset
228 lwasm_emit(cl, opc >> 8);
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
229 lwasm_emit(cl, opc);
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
230 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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diff changeset
231
a82c55070624 Added expression parsing infrastructure and misc fixes
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diff changeset
232 lw_expr_t lwasm_parse_term(char **p, void *priv)
a82c55070624 Added expression parsing infrastructure and misc fixes
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diff changeset
233 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
234 asmstate_t *as = priv;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
235 int val;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
236
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
237 if (!**p)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
238 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
239
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
240 if (**p == '*' || (
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
241 **p == '.'
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
242 && !((*p)[1] >= 'A' && (*p)[1] <= 'Z')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
243 && !((*p)[1] >= 'a' && (*p)[1] <= 'z')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
244 && !((*p)[1] >= '0' && (*p)[1] <= '9')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
245 ))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
246 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
247 // special "symbol" for current line addr (*, .)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
248 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
249 return lw_expr_build(lw_expr_type_special, lwasm_expr_lineaddr, as -> cl);
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
250 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
251
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
252 // branch points
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
253 if (**p == '<')
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
254 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
255 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
256 return lw_expr_build(lw_expr_type_special, lwasm_expr_prevbp, as -> cl);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
257 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
258 if (**p == '>')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
259 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
260 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
261 return lw_expr_build(lw_expr_type_special, lwasm_expr_nextbp, as -> cl);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
262 }
a82c55070624 Added expression parsing infrastructure and misc fixes
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diff changeset
263
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
264 // double ascii constant
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
265 if (**p == '"')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
266 {
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
267 int v;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
268 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
269 if (!**p)
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
270 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
271 if (!*((*p)+1))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
272 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
273 v = (unsigned char)**p << 8 | (unsigned char)*((*p)+1);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
274 (*p) += 2;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
275 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
276 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
277
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
278 if (**p == '\'')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
279 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
280 int v;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
281
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
282 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
283 if (!**p)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
284 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
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parents: 345
diff changeset
285
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
286 v = (unsigned char)**p;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
287 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
288 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
289 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
290
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
291 if (**p == '&')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
292 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
293 // decimal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
294 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
295 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
296
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
297 if (!strchr("0123456789", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
298 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
299
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
300 while (**p && strchr("0123456789", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
301 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
302 val = val * 10 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
303 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
304 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
305 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
306 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
307
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
308 if (**p == '%')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
309 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
310 // binary constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
311 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
312 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
313
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
314 if (**p != '0' && **p != '1')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
315 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
316
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
317 while (**p && (**p == '0' || **p == '1'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
318 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
319 val = val * 2 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
320 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
321 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
322 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
323 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
324
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
325 if (**p == '$')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
326 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
327 // hexadecimal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
328 int v = 0, v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
329 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
330
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
331 if (!strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
332 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
333
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
334 while (**p && strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
335 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
336 v2 = toupper(**p) - '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
337 if (v2 > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
338 v2 -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
339 val = val * 16 + v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
340 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
341 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
342 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
343 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
344
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
345 if (**p == '0' && (*((*p)+1) == 'x' || *((*p)+1) == 'X'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
346 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
347 // hexadecimal constant, C style
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
348 int v = 0, v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
349 (*p)+=2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
350
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
351 if (!strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
352 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
353
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
354 while (**p && strchr("0123456789abcdefABCDEF", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
355 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
356 v2 = toupper(**p) - '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
357 if (v2 > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
358 v2 -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
359 val = val * 16 + v2;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
360 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
361 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
362 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
363 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
364
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
365 if (**p == '@' && (*((*p)+1) >= '0' && *((*p)+1) <= '7'))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
366 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
367 // octal constant
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
368 int v = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
369 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
370
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
371 if (!strchr("01234567", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
372 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
373
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
374 while (**p && strchr("01234567", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
375 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
376 val = val * 8 + (**p - '0');
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
377 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
378 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
379 return lw_expr_build(lw_expr_type_int, v);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
380 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
381
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
382
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
383 // symbol or bare decimal or suffix constant here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
384 do
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
385 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
386 int havedol = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
387 int l = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
388
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
389 while ((*p)[l] && strchr(SYMCHARS, (*p)[l]))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
390 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
391 if ((*p)[l] == '$')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
392 havedol = 1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
393 l++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
394 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
395 if (l == 0)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
396 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
397
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
398 if (havedol || **p < '0' || **p > '9')
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
399 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
400 // have a symbol here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
401 char *sym;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
402 lw_expr_t term;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
403
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
404 sym = lw_strndup(*p, l);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
405 (*p) += l;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
406 term = lw_expr_build(lw_expr_type_var, sym);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
407 lw_free(sym);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
408 return term;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
409 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
410 } while (0);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
411
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
412 if (!**p)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
413 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
414
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
415 // we have a numeric constant here, either decimal or postfix base notation
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
416 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
417 int decval = 0, binval = 0, hexval = 0, octval = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
418 int valtype = 15; // 1 = bin, 2 = oct, 4 = dec, 8 = hex
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
419 int bindone = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
420 int val;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
421 int dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
422
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
423 while (1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
424 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
425 if (!**p || !strchr("0123456789ABCDEFabcdefqhoQHO", **p))
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
426 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
427 // we can legally be bin or decimal here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
428 if (bindone)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
429 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
430 // just finished a binary value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
431 val = binval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
432 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
433 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
434 else if (valtype & 4)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
435 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
436 val = decval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
437 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
438 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
439 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
440 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
441 // bad value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
442 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
443 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
444 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
445
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
446 dval = toupper(**p);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
447 (*p)++;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
448
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
449 if (bindone)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
450 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
451 // any characters past "B" means it is not binary
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
452 bindone = 0;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
453 valtype &= 14;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
454 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
455
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
456 switch (dval)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
457 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
458 case 'Q':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
459 case 'O':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
460 if (valtype & 2)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
461 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
462 val = octval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
463 valtype = -1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
464 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
465 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
466 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
467 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
468 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
469 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
470 /* can't get here */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
471
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
472 case 'H':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
473 if (valtype & 8)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
474 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
475 val = hexval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
476 valtype = -1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
477 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
478 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
479 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
480 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
481 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
482 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
483 /* can't get here */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
484
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
485 case 'B':
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
486 // this is a bit of a sticky one since B may be a
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
487 // hex number instead of the end of a binary number
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
488 // so it falls through to the digit case
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
489 if (valtype & 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
490 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
491 // could still be binary of hex
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
492 bindone = 1;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
493 valtype = 9;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
494 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
495 /* fall through intented */
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
496
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
497 default:
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
498 // digit
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
499 dval -= '0';
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
500 if (dval > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
501 dval -= 7;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
502 if (valtype & 8)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
503 hexval = hexval * 16 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
504 if (valtype & 4)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
505 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
506 if (dval > 9)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
507 valtype &= 11;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
508 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
509 decval = decval * 10 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
510 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
511 if (valtype & 2)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
512 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
513 if (dval > 7)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
514 valtype &= 13;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
515 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
516 octval = octval * 8 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
517 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
518 if (valtype & 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
519 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
520 if (dval > 1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
521 valtype &= 14;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
522 else
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
523 binval = binval * 2 + dval;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
524 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
525 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
526 if (valtype == -1)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
527 break;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
528
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
529 // return if no more valid types
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
530 if (valtype == 0)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
531 return NULL;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
532
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
533 val = decval; // in case we fall through
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
534 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
535
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
536 // get here if we have a value
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
537 return lw_expr_build(lw_expr_type_int, val);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
538 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
539 // can't get here
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
540 }
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
541
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
542 lw_expr_t lwasm_parse_expr(asmstate_t *as, char **p)
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
543 {
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
544 lw_expr_t e;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
545
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
546 e = lw_expr_parse(p, as);
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
547
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
548 return e;
a82c55070624 Added expression parsing infrastructure and misc fixes
lost@starbug
parents: 345
diff changeset
549 }
347
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
550
363
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
551 int lwasm_reduce_expr(asmstate_t *as, lw_expr_t expr)
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
552 {
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
553 lw_expr_simplify(expr, as);
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
554 }
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
555
347
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
556 void lwasm_save_expr(line_t *cl, int id, lw_expr_t expr)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
557 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
558 struct line_expr_s *e;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
559
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
560 for (e = cl -> exprs; e; e = e -> next)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
561 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
562 if (e -> id == id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
563 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
564 lw_expr_destroy(e -> expr);
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
565 e -> expr = expr;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
566 return;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
567 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
568 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
569
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
570 e = lw_alloc(sizeof(struct line_expr_s));
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
571 e -> expr = expr;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
572 e -> id = id;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
573 e -> next = cl -> exprs;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
574 cl -> exprs = e;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
575 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
576
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
577 lw_expr_t lwasm_fetch_expr(line_t *cl, int id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
578 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
579 struct line_expr_s *e;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
580
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
581 for (e = cl -> exprs; e; e = e -> next)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
582 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
583 if (e -> id == id)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
584 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
585 return e -> expr;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
586 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
587 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
588 return NULL;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
589 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
590
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
591 void skip_operand(char **p)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
592 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
593 for (; **p && !isspace(**p); (*p)++)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
594 /* do nothing */ ;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
595 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
596
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
597 int lwasm_emitexpr(line_t *l, lw_expr_t expr, int size)
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
598 {
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
599 int v;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
600
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
601 if (lw_expr_istype(expr, lw_expr_type_int))
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
602 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
603 v = lw_expr_intval(expr);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
604 }
348
11a95c6414b4 Added third func to instab to split resolve and emit logic
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parents: 347
diff changeset
605 // handle external/cross-section/incomplete references here
347
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
606 else
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
607 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
608 lwasm_register_error(l -> as, l, "Expression not fully resolved");
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
609 return -1;
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
610 }
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
611
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
612 switch (size)
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
613 {
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
614 case 4:
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
615 lwasm_emit(l, v >> 24);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
616 lwasm_emit(l, v >> 16);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
617 /* fallthrough intended */
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
618
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
619 case 2:
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
620 lwasm_emit(l, v >> 8);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
621 /* fallthrough intended */
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
622
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
623 case 1:
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
624 lwasm_emit(l, v);
1649bc7bda5a Some data oriented pseudo ops added
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parents: 346
diff changeset
625 }
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
626
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
627 return 0;
1649bc7bda5a Some data oriented pseudo ops added
lost@starbug
parents: 346
diff changeset
628 }
357
0cf4948d53b4 Checkpoint - adding actual cpu instructions
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parents: 354
diff changeset
629
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
630 int lwasm_lookupreg2(const char *regs, char **p)
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
631 {
0cf4948d53b4 Checkpoint - adding actual cpu instructions
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parents: 354
diff changeset
632 int rval = 0;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
633
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
634 while (*regs)
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
635 {
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
636 if (toupper(**p) == *regs)
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
637 {
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
638 if (regs[1] == ' ' && !isalpha(*(*p + 1)))
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
639 break;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
640 if (toupper(*(*p + 1)) == regs[1])
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
641 break;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
642 }
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
643 regs += 2;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
644 rval++;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
645 }
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
646 if (!*regs)
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
647 return -1;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
648 if (regs[1] == ' ')
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
649 (*p)++;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
650 else
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
651 (*p) += 2;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
652 return rval;
0cf4948d53b4 Checkpoint - adding actual cpu instructions
lost@starbug
parents: 354
diff changeset
653 }
359
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
654
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
655 int lwasm_lookupreg3(const char *regs, char **p)
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
656 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
657 int rval = 0;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
658
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
659 while (*regs)
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
660 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
661 if (toupper(**p) == *regs)
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
662 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
663 if (regs[1] == ' ' && !isalpha(*(*p + 1)))
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
664 break;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
665 if (toupper(*(*p + 1)) == regs[1])
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
666 {
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
667 if (regs[2] == ' ' && !isalpha(*(*p + 2)))
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
668 break;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
669 if (toupper(*(*p + 2)) == regs[2])
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
670 break;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
671 }
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
672 }
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
673 regs += 3;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
674 rval++;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
675 }
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
676 if (!*regs)
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
677 return -1;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
678 if (regs[1] == ' ')
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
679 (*p)++;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
680 else if (regs[2] == ' ')
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
681 (*p) += 2;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
682 else
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
683 (*p) += 3;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
684 return rval;
f50a54d0293a Indexed part 1
lost@starbug
parents: 357
diff changeset
685 }
363
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
686
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
687 void lwasm_show_errors(asmstate_t *as)
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
688 {
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
689 fprintf(stderr, "Errors encountered. FIXME - print out errors.\n");
d96c30e60ddf Added pass2 and various supporting logic including symbol lookups
lost@starbug
parents: 359
diff changeset
690 }