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annotate lwcc/cc-main.c @ 560:dba08c7dff96

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Fix off by one handling MOD directive optional arguments Fixes an off by one in handling the optional arguments to the MOD directive as of changeset 928c033c0cd0. Thanks to Alex Evans <varmfskii@gmail.com> for reporting the problem and a suggested fix. This fix is different but should be more stable should the rest of the parsing code be refactored in the future.
author William Astle <lost@l-w.ca>
date Fri, 22 Sep 2023 12:15:09 -0600
parents c3099c5d9d3e
children
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rev   line source
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1 /*
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2 lwcc/cpp-main.c
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3
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4 Copyright © 2013 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
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22 #include <errno.h>
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23 #include <stdarg.h>
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24 #include <stdio.h>
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25 #include <stdlib.h>
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26 #include <string.h>
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27
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28 #include <lw_stringlist.h>
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29 #include <lw_cmdline.h>
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30 #include <lw_string.h>
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31
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32 #include <version.h>
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33
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34 #include "cpp.h"
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35 #include "tree.h"
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36
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37 node_t *process_file(const char *);
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38 static void do_error(const char *f, ...);
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39 extern node_t *parse_program(struct preproc_info *pp);
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40 extern void generate_code(node_t *n, FILE *of);
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41
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42 node_t *program_tree = NULL;
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43
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44 /* command line option handling */
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45 #define PROGVER "lwcc-cc from " PACKAGE_STRING
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46 char *program_name;
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47
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48 /* input files */
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49 lw_stringlist_t input_files;
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50 lw_stringlist_t includedirs;
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51 lw_stringlist_t sysincludedirs;
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52 lw_stringlist_t macrolist;
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53
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54 /* various flags */
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55 int trigraphs = 0;
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56 char *output_file = NULL;
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57 FILE *output_fp = NULL;
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58
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59 static struct lw_cmdline_options options[] =
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60 {
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61 { "output", 'o', "FILE", 0, "Output to FILE"},
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62 { "include", 'i', "FILE", 0, "Pre-include FILE" },
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63 { "includedir", 'I', "PATH", 0, "Add entry to the user include path" },
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64 { "sincludedir", 'S', "PATH", 0, "Add entry to the system include path" },
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65 { "define", 'D', "SYM[=VAL]",0, "Automatically define SYM to be VAL (or 1)"},
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66 { "trigraphs", 0x100, NULL, 0, "Enable interpretation of trigraphs" },
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67 { 0 }
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68 };
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69
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70 static int parse_opts(int key, char *arg, void *state)
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71 {
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72 switch (key)
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73 {
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74 case 'o':
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75 if (output_file)
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76 do_error("Output file specified more than once.");
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77 output_file = arg;
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78 break;
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79
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80 case 0x100:
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81 trigraphs = 1;
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82 break;
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83
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84 case 'I':
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85 lw_stringlist_addstring(includedirs, arg);
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86 break;
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87
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88 case 'S':
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89 lw_stringlist_addstring(sysincludedirs, arg);
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90 break;
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91
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92 case 'D':
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93 lw_stringlist_addstring(macrolist, arg);
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94 break;
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95
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96 case lw_cmdline_key_end:
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97 break;
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98
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99 case lw_cmdline_key_arg:
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100 lw_stringlist_addstring(input_files, arg);
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101 break;
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102
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103 default:
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104 return lw_cmdline_err_unknown;
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105 }
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106 return 0;
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107 }
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108
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109 static struct lw_cmdline_parser cmdline_parser =
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110 {
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111 options,
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112 parse_opts,
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113 "INPUTFILE",
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114 "lwcc-cc - C compiler for lwcc",
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115 PROGVER
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116 };
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117
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118 int main(int argc, char **argv)
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119 {
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120 program_name = argv[0];
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121 int retval = 0;
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122 node_t *n;
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123
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124 input_files = lw_stringlist_create();
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125 includedirs = lw_stringlist_create();
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126 sysincludedirs = lw_stringlist_create();
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127 macrolist = lw_stringlist_create();
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128
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129 /* parse command line arguments */
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130 lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL);
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131
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132 /* set up output file */
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133 if (output_file == NULL || strcmp(output_file, "-") == 0)
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134 {
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135 output_fp = stdout;
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136 }
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137 else
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138 {
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139 output_fp = fopen(output_file, "wb");
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140 if (output_fp == NULL)
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141 {
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142 do_error("Failed to create output file %s: %s", output_file, strerror(errno));
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143 }
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144 }
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145
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146 program_tree = node_create(NODE_PROGRAM);
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147
311
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148 if (lw_stringlist_nstrings(input_files) == 0)
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149 {
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150 /* if no input files, work on stdin */
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151 n = process_file("-");
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152 if (!n)
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153 retval = 1;
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154 else
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155 node_addchild(program_tree, n);
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156 }
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157 else
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158 {
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159 char *s;
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160 lw_stringlist_reset(input_files);
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161 for (s = lw_stringlist_current(input_files); s; s = lw_stringlist_next(input_files))
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162 {
312
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163 n = process_file(s);
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164 if (!n)
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165 retval = 1;
311
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166 if (retval != 0)
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167 break;
312
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168 node_addchild(program_tree, n);
311
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169 }
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170 }
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171 lw_stringlist_destroy(input_files);
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172 lw_stringlist_destroy(includedirs);
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173 lw_stringlist_destroy(sysincludedirs);
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174 lw_stringlist_destroy(macrolist);
312
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175
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176 node_display(program_tree, stdout);
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177
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178 // generate output
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179 generate_code(program_tree, output_fp);
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180
312
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181 node_destroy(program_tree);
311
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182 exit(retval);
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183 }
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184
312
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185 node_t *process_file(const char *fn)
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186 {
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187 struct preproc_info *pp;
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188 char *tstr;
312
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189 node_t *n;
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190
311
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191 pp = preproc_init(fn);
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192 if (!pp)
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193 return NULL;
311
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194
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195 /* set up the include paths */
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196 lw_stringlist_reset(includedirs);
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197 for (tstr = lw_stringlist_current(includedirs); tstr; tstr = lw_stringlist_next(includedirs))
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198 {
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199 preproc_add_include(pp, tstr, 0);
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200 }
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201
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202 lw_stringlist_reset(sysincludedirs);
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203 for (tstr = lw_stringlist_current(sysincludedirs); tstr; tstr = lw_stringlist_next(sysincludedirs))
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204 {
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205 preproc_add_include(pp, tstr, 1);
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206 }
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207
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208 /* set up pre-defined macros */
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209 lw_stringlist_reset(macrolist);
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210 for (tstr = lw_stringlist_current(macrolist); tstr; tstr = lw_stringlist_next(macrolist))
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211 {
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212 preproc_add_macro(pp, tstr);
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213 }
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214
312
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215 n = parse_program(pp);
311
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216 preproc_finish(pp);
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217
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218 return n;
311
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219 }
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220
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221 static void do_error(const char *f, ...)
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222 {
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223 va_list args;
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224 va_start(args, f);
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225 fprintf(stderr, "ERROR: ");
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226 vfprintf(stderr, f, args);
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227 va_end(args);
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228 fprintf(stderr, "\n");
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229 exit(1);
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230 }