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339
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1 /*
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2 main.c
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3 Copyright © 2009 William Astle
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4
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5 This file is part of LWASM.
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6
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7 LWASM is free software: you can redistribute it and/or modify it under the
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8 terms of the GNU General Public License as published by the Free Software
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9 Foundation, either version 3 of the License, or (at your option) any later
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10 version.
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11
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12 This program is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 You should have received a copy of the GNU General Public License along with
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18 this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20
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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 #include <config.h>
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26
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27 #include <argp.h>
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28 #include <errno.h>
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31 #include <unistd.h>
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32
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33 #include "lwasm.h"
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34
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35 extern void pseudo_pragma_real(asmstate_t *as, void *cl, char **optr, int error);
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36
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37 // command line option handling
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38 const char *argp_program_version = "LWASM from " PACKAGE_STRING;
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39 const char *argp_program_bug_address = PACKAGE_BUGREPORT;
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40
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41 static error_t parse_opts(int key, char *arg, struct argp_state *state)
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42 {
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43 asmstate_t *as = state -> input;
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44 char *p;
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45
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46 switch (key)
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47 {
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48 case 'o':
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49 // output
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50 if (as -> outfile)
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51 {
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52 }
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53 as -> outfile = arg;
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54 break;
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55
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56 case 'd':
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57 // debug
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58 debug_level++;
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59 break;
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60
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61 case 'l':
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62 // list
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63 if (arg)
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64 as -> listfile = arg;
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65 else
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66 as -> listfile = "-";
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67 break;
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68
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69 case 'b':
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70 // decb output
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71 as -> outformat = OUTPUT_DECB;
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72 break;
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73
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74 case 'r':
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75 // raw binary output
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76 as -> outformat = OUTPUT_RAW;
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77 break;
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78
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79 case 0x100:
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80 // proprietary object format
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81 as -> outformat = OUTPUT_OBJ;
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82 break;
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83
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84 case 'f':
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85 // output format
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86 if (!strcasecmp(arg, "decb"))
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87 as -> outformat = OUTPUT_DECB;
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88 else if (!strcasecmp(arg, "raw"))
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89 as -> outformat = OUTPUT_RAW;
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90 else if (!strcasecmp(arg, "obj"))
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91 as -> outformat = OUTPUT_OBJ;
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92 else if (!strcasecmp(arg, "os9"))
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93 {
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94 as -> pragmas |= PRAGMA_DOLLARNOTLOCAL;
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95 as -> outformat = OUTPUT_OS9;
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96 }
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97 else
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98 {
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99 fprintf(stderr, "Invalid output format: %s\n", arg);
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100 exit(1);
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101 }
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102 break;
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103
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104 case 'p':
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105 // pragmas
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106 p = arg;
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107 pseudo_pragma_real(as, NULL, &p, 2);
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108 if (!p)
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109 {
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110 fprintf(stderr, "Invalid pragma string: %s\n", arg);
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111 exit(1);
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112 }
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113 break;
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114
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115 case '9':
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116 as -> no6309 = 1;
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117 break;
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118
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119 case '3':
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120 as -> no6309 = 0;
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121 break;
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122
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123 case ARGP_KEY_END:
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124 // done; sanity check
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125 if (!as -> outfile)
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126 as -> outfile = "a.out";
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127 break;
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128
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129 case ARGP_KEY_ARG:
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130 // non-option arg
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131 if (as -> infile)
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132 argp_usage(state);
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133 as -> infile = arg;
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134 break;
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135
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136 default:
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137 return ARGP_ERR_UNKNOWN;
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138 }
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139 return 0;
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140 }
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141
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142 static struct argp_option options[] =
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143 {
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144 { "output", 'o', "FILE", 0,
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145 "Output to FILE"},
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146 { "debug", 'd', 0, 0,
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147 "Set debug mode"},
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148 { "format", 'f', "TYPE", 0,
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149 "Select output format: decb, raw, obj, os9"},
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150 { "list", 'l', "FILE", OPTION_ARG_OPTIONAL,
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151 "Generate list [to FILE]"},
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152 { "decb", 'b', 0, 0,
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153 "Generate DECB .bin format output, equivalent of --format=decb"},
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154 { "raw", 'r', 0, 0,
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155 "Generate raw binary format output, equivalent of --format=raw"},
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156 { "obj", 0x100, 0, 0,
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157 "Generate proprietary object file format for later linking, equivalent of --format=obj" },
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158 { "pragma", 'p', "PRAGMA", 0,
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159 "Set an assembler pragma to any value understood by the \"pragma\" pseudo op"},
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160 { "6809", '9', 0, 0,
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161 "Set assembler to 6809 only mode" },
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162 { "6309", '3', 0, 0,
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163 "Set assembler to 6309 mode (default)" },
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164 { 0 }
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165 };
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166
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167 static struct argp argp =
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168 {
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169 options,
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170 parse_opts,
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171 "<input file>",
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172 "LWASM, a HD6309 and MC6809 cross-assembler"
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173 };
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174
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175 char *program_name;
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176
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177 // main function; parse command line, set up assembler state, and run the
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178 // assembler on the first file
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179 int main(int argc, char **argv)
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180 {
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181 asmstate_t asmstate;
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182
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183 program_name = argv[0];
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184
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185 argp_parse(&argp, argc, argv, 0, 0, &asmstate);
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186
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187 if (!asmstate.infile)
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188 {
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189 fprintf(stderr, "No input files specified.\n");
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190 exit(1);
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191 }
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192
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193 // lose the output file if it already exists...
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194 unlink(asmstate.outfile);
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195
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196 exit(0);
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197 }
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198
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