annotate src/main.c @ 25:3b818f05dc2a

imported instruction table from older version to development version
author lost
date Fri, 02 Jan 2009 02:03:48 +0000
parents 925105ccf22f
children 39d750ee8d34
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1 /*
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2 main.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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21 Implements the program startup code
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22
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23 */
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24
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25 #ifdef HAVE_CONFIG_H
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26 #include "config.h"
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27 #endif
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28
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29 #include <argp.h>
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30 #include <errno.h>
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31 #include <stdio.h>
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32 #include <stdlib.h>
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33
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34 #include "lwasm.h"
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35
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36 // external declarations
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37 extern void lwasm_pass1(asmstate_t *as);
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38 extern void lwasm_pass2(asmstate_t *as);
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39
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40
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41 // command line option handling
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42 const char *argp_program_version = PACKAGE_STRING;
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43 const char *argp_program_bug_address = PACKAGE_BUGREPORT;
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44
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45 static error_t parse_opts(int key, char *arg, struct argp_state *state)
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46 {
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47 asmstate_t *as = state -> input;
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48
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49 switch (key)
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50 {
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51 case 'o':
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52 // output
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53 if (as -> outfile)
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54 {
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55 }
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56 as -> outfile = arg;
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57 break;
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58
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59 case 'd':
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60 // debug
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61 as -> debug++;
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62 break;
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63
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64 case 'l':
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65 // list
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66 if (arg)
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67 as -> listfile = arg;
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68 else
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69 as -> listfile = "-";
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70 break;
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71
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72 case 'b':
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73 // decb output
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74 as -> outformat = OUTPUT_DECB;
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75 break;
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76
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77 case 'r':
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78 // raw binary output
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79 as -> outformat = OUTPUT_RAW;
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80 break;
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81
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82 case 0x100:
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83 // proprietary object format
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84 as -> outformat = OUTPUT_OBJ;
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85 break;
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86
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87 case 'f':
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88 // output format
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89 if (!strcasecmp(arg, "decb"))
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90 as -> outformat = OUTPUT_DECB;
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91 else if (!strcasecmp(arg, "raw"))
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92 as -> outformat = OUTPUT_RAW;
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93 else if (!strcasecmp(arg, "obj"))
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94 as -> outformat = OUTPUT_OBJ;
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95 else
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96 {
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97 fprintf(stderr, "Invalid output format: %s\n", arg);
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98 exit(1);
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99 }
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100 break;
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101 case ARGP_KEY_END:
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102 // done; sanity check
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103 if (!as -> outfile)
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104 as -> outfile = "a.out";
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105 break;
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106
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107 case ARGP_KEY_ARG:
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108 // non-option arg
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109 if (as -> infile)
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110 argp_usage(state);
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111 as -> infile = arg;
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112 break;
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113
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114 default:
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115 return ARGP_ERR_UNKNOWN;
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116 }
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117 return 0;
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118 }
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119
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120 static struct argp_option options[] =
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121 {
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122 { "output", 'o', "FILE", 0,
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123 "Output to FILE"},
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124 { "debug", 'd', 0, 0,
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125 "Set debug mode"},
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126 { "format", 'f', "TYPE", 0,
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127 "Select output format: decb, raw, obj"},
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128 { "list", 'l', "FILE", OPTION_ARG_OPTIONAL,
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129 "Generate list [to FILE]"},
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130 { "decb", 'b', 0, 0,
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131 "Generate DECB .bin format output, equivalent of --format=decb"},
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132 { "raw", 'r', 0, 0,
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133 "Generate raw binary format output, equivalent of --format=raw"},
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134 { "obj", 0, 0, 0,
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135 "Generate proprietary object file format for later linking, equivalent of --format=obj" },
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136 { 0 }
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137 };
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138
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139 static struct argp argp =
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140 {
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141 options,
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142 parse_opts,
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143 "<input file>",
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144 "LWASM, a HD6309 and MC6809 cross-assembler"
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145 };
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146
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147 // main function; parse command line, set up assembler state, and run the
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148 // assembler on the first file
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149 int main(int argc, char **argv)
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150 {
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151 // assembler state
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152 asmstate_t asmstate = { 0 };
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153
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154 argp_parse(&argp, argc, argv, 0, 0, &asmstate);
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155 if (!asmstate.listfile)
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156 asmstate.listfile = "-";
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157
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158 if (!asmstate.infile)
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159 {
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160 fprintf(stderr, "No input files specified.\n");
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161 exit(1);
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162 }
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163
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164 /* pass 1 - collect the symbols and assign addresses where possible */
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165 /* pass 1 also resolves included files, etc. */
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166 /* that means files are read exactly once unless included multiple times */
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167 lwasm_pass1(&asmstate);
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168
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169 // pass 2: actually generate the code; if any phasing errors appear
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170 // at this stage, we have a bug
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171 lwasm_pass2(&asmstate);
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172
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173 // now make a pretty listing
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174 // lwasm_list(&asmstate);
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175
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176 // now write the code out to the output file
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177 // lwasm_output(&asmstate);
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178
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179 if (asmstate.errorcount > 0)
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180 exit(1);
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181
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182 exit(0);
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183 }
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184