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annotate lwcc/cpp-main.c @ 512:7e41d6123175
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| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Sat, 04 Jul 2020 16:21:08 -0600 |
| parents | a38542cf4cc6 |
| children |
| rev | line source |
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| 295 | 1 /* |
| 2 lwcc/cpp-main.c | |
| 3 | |
| 4 Copyright © 2013 William Astle | |
| 5 | |
| 6 This file is part of LWTOOLS. | |
| 7 | |
| 8 LWTOOLS is free software: you can redistribute it and/or modify it under the | |
| 9 terms of the GNU General Public License as published by the Free Software | |
| 10 Foundation, either version 3 of the License, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 This program is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 16 more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License along with | |
| 19 this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 */ | |
| 21 | |
| 22 #include <errno.h> | |
| 23 #include <stdarg.h> | |
| 24 #include <stdio.h> | |
| 25 #include <stdlib.h> | |
| 26 #include <string.h> | |
| 313 | 27 #include <lw_alloc.h> |
| 295 | 28 #include <lw_stringlist.h> |
| 29 #include <lw_cmdline.h> | |
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30 #include <lw_string.h> |
| 295 | 31 |
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32 #include <version.h> |
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33 |
| 295 | 34 #include "cpp.h" |
| 35 | |
| 36 int process_file(const char *); | |
| 37 static void do_error(const char *f, ...); | |
| 38 | |
| 39 /* command line option handling */ | |
| 40 #define PROGVER "lwcc-cpp from " PACKAGE_STRING | |
| 41 char *program_name; | |
| 42 | |
| 43 /* input files */ | |
| 44 lw_stringlist_t input_files; | |
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45 lw_stringlist_t includedirs; |
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46 lw_stringlist_t sysincludedirs; |
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47 lw_stringlist_t macrolist; |
| 295 | 48 |
| 49 /* various flags */ | |
| 50 int trigraphs = 0; | |
| 51 char *output_file = NULL; | |
| 52 FILE *output_fp = NULL; | |
| 53 | |
| 54 static struct lw_cmdline_options options[] = | |
| 55 { | |
| 56 { "output", 'o', "FILE", 0, "Output to FILE"}, | |
| 57 { "include", 'i', "FILE", 0, "Pre-include FILE" }, | |
| 58 { "includedir", 'I', "PATH", 0, "Add entry to the user include path" }, | |
| 59 { "sincludedir", 'S', "PATH", 0, "Add entry to the system include path" }, | |
| 60 { "define", 'D', "SYM[=VAL]",0, "Automatically define SYM to be VAL (or 1)"}, | |
| 61 { "trigraphs", 0x100, NULL, 0, "Enable interpretation of trigraphs" }, | |
| 62 { 0 } | |
| 63 }; | |
| 64 | |
| 65 static int parse_opts(int key, char *arg, void *state) | |
| 66 { | |
| 67 switch (key) | |
| 68 { | |
| 69 case 'o': | |
| 70 if (output_file) | |
| 71 do_error("Output file specified more than once."); | |
| 72 output_file = arg; | |
| 73 break; | |
| 74 | |
| 75 case 0x100: | |
| 76 trigraphs = 1; | |
| 77 break; | |
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78 |
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79 case 'I': |
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80 lw_stringlist_addstring(includedirs, arg); |
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81 break; |
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82 |
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83 case 'S': |
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84 lw_stringlist_addstring(sysincludedirs, arg); |
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85 break; |
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86 |
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87 case 'D': |
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88 lw_stringlist_addstring(macrolist, arg); |
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89 break; |
| 295 | 90 |
| 91 case lw_cmdline_key_end: | |
| 92 break; | |
| 93 | |
| 94 case lw_cmdline_key_arg: | |
| 95 lw_stringlist_addstring(input_files, arg); | |
| 96 break; | |
| 97 | |
| 98 default: | |
| 99 return lw_cmdline_err_unknown; | |
| 100 } | |
| 101 return 0; | |
| 102 } | |
| 103 | |
| 104 static struct lw_cmdline_parser cmdline_parser = | |
| 105 { | |
| 106 options, | |
| 107 parse_opts, | |
| 108 "INPUTFILE", | |
| 109 "lwcc-cpp - C preprocessor for lwcc", | |
| 110 PROGVER | |
| 111 }; | |
| 112 | |
| 113 int main(int argc, char **argv) | |
| 114 { | |
| 115 program_name = argv[0]; | |
| 116 int retval = 0; | |
| 117 | |
| 118 input_files = lw_stringlist_create(); | |
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119 includedirs = lw_stringlist_create(); |
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120 sysincludedirs = lw_stringlist_create(); |
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121 macrolist = lw_stringlist_create(); |
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122 |
| 295 | 123 /* parse command line arguments */ |
| 124 lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL); | |
| 125 | |
| 126 /* set up output file */ | |
| 127 if (output_file == NULL || strcmp(output_file, "-") == 0) | |
| 128 { | |
| 129 output_fp = stdout; | |
| 130 } | |
| 131 else | |
| 132 { | |
| 133 output_fp = fopen(output_file, "wb"); | |
| 134 if (output_fp == NULL) | |
| 135 { | |
| 136 do_error("Failed to create output file %s: %s", output_file, strerror(errno)); | |
| 137 } | |
| 138 } | |
| 139 | |
| 140 if (lw_stringlist_nstrings(input_files) == 0) | |
| 141 { | |
| 142 /* if no input files, work on stdin */ | |
| 143 retval = process_file("-"); | |
| 144 } | |
| 145 else | |
| 146 { | |
| 147 char *s; | |
| 148 lw_stringlist_reset(input_files); | |
| 149 for (s = lw_stringlist_current(input_files); s; s = lw_stringlist_next(input_files)) | |
| 150 { | |
| 151 retval = process_file(s); | |
| 152 if (retval != 0) | |
| 153 break; | |
| 154 } | |
| 155 } | |
| 156 lw_stringlist_destroy(input_files); | |
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157 lw_stringlist_destroy(includedirs); |
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158 lw_stringlist_destroy(sysincludedirs); |
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159 lw_stringlist_destroy(macrolist); |
| 295 | 160 exit(retval); |
| 161 } | |
| 162 | |
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163 static void print_line_marker(FILE *fp, int line, const char *fn, int flag) |
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164 { |
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165 fprintf(fp, "\n# %d \"", line); |
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166 while (*fn) |
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167 { |
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168 if (*fn < 32 || *fn == 34 || *fn > 126) |
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169 { |
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170 fprintf(fp, "\\%03o", *fn); |
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171 } |
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172 else |
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173 { |
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174 fprintf(fp, "%c", *fn); |
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175 } |
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176 fn++; |
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177 } |
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178 fprintf(fp, "\" %d", flag); |
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179 } |
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180 |
| 295 | 181 int process_file(const char *fn) |
| 182 { | |
| 183 struct preproc_info *pp; | |
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184 struct token *tok = NULL; |
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185 int last_line = 0; |
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186 char *last_fn = NULL; |
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187 char *tstr; |
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188 |
| 295 | 189 pp = preproc_init(fn); |
| 190 if (!pp) | |
| 191 return -1; | |
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192 |
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193 /* set up the include paths */ |
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194 lw_stringlist_reset(includedirs); |
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195 for (tstr = lw_stringlist_current(includedirs); tstr; tstr = lw_stringlist_next(includedirs)) |
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196 { |
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197 preproc_add_include(pp, tstr, 0); |
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198 } |
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199 |
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200 lw_stringlist_reset(sysincludedirs); |
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201 for (tstr = lw_stringlist_current(sysincludedirs); tstr; tstr = lw_stringlist_next(sysincludedirs)) |
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202 { |
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203 preproc_add_include(pp, tstr, 1); |
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204 } |
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205 |
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206 /* set up pre-defined macros */ |
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207 lw_stringlist_reset(macrolist); |
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208 for (tstr = lw_stringlist_current(macrolist); tstr; tstr = lw_stringlist_next(macrolist)) |
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209 { |
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210 preproc_add_macro(pp, tstr); |
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211 } |
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212 |
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213 print_line_marker(output_fp, 1, fn, 1); |
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214 last_fn = lw_strdup(fn); |
| 295 | 215 for (;;) |
| 216 { | |
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217 tok = preproc_next(pp); |
| 295 | 218 if (tok -> ttype == TOK_EOF) |
| 219 break; | |
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220 if (strcmp(tok -> fn, last_fn) != 0) |
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221 { |
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222 int lt = 1; |
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223 if (tok -> lineno != 1) |
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224 { |
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225 lt = 2; |
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226 } |
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227 lw_free(last_fn); |
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228 last_fn = lw_strdup(tok -> fn); |
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229 last_line = tok -> lineno; |
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230 print_line_marker(output_fp, last_line, last_fn, lt); |
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231 } |
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232 else |
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233 { |
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234 while (tok -> lineno > last_line) |
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235 { |
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236 fprintf(output_fp, "\n"); |
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237 last_line++; |
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238 } |
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239 } |
| 295 | 240 token_print(tok, output_fp); |
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241 if (tok -> ttype == TOK_EOL) |
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parents:
304
diff
changeset
|
242 last_line++; |
|
304
d85d173ba120
Checkpoint lwcc development - preprocessor is runnable but nonfunctional
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
|
243 token_free(tok); |
| 295 | 244 } |
|
304
d85d173ba120
Checkpoint lwcc development - preprocessor is runnable but nonfunctional
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
|
245 token_free(tok); |
|
305
54f213c8fb81
Various bugfixes and output tuning
William Astle <lost@l-w.ca>
parents:
304
diff
changeset
|
246 lw_free(last_fn); |
|
54f213c8fb81
Various bugfixes and output tuning
William Astle <lost@l-w.ca>
parents:
304
diff
changeset
|
247 // symtab_dump(pp); |
| 295 | 248 preproc_finish(pp); |
| 249 return 0; | |
| 250 } | |
| 251 | |
| 252 static void do_error(const char *f, ...) | |
| 253 { | |
| 254 va_list args; | |
| 255 va_start(args, f); | |
| 256 fprintf(stderr, "ERROR: "); | |
| 257 vfprintf(stderr, f, args); | |
| 258 va_end(args); | |
| 259 fprintf(stderr, "\n"); | |
| 260 exit(1); | |
| 261 } |