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annotate lwcc/cpp-main.c @ 314:a3e277c58df9 ccdev
Checkpoint parser development for lwcc
Beginning of lemon based parser for C including all the infrastructure for
calling the lemon generated parser. This requires a translation layer from
the preprocessor token numbers to the lemon parser token numbers due to the
fact that lemon wants to control the token numbers. Eventually when the
lemon parser gets replaced with a hand crafted recursive descent parser,
this translation will no longer be required. However, in the interest of
getting things working sooner rather than later, using something like lemon
is beneficial.
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Sun, 17 Nov 2013 11:59:36 -0700 |
| parents | 73b2bfa17ab0 |
| children | a38542cf4cc6 |
| rev | line source |
|---|---|
| 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 |
| 32 #include "cpp.h" | |
| 33 | |
| 34 int process_file(const char *); | |
| 35 static void do_error(const char *f, ...); | |
| 36 | |
| 37 /* command line option handling */ | |
| 38 #define PROGVER "lwcc-cpp from " PACKAGE_STRING | |
| 39 char *program_name; | |
| 40 | |
| 41 /* input files */ | |
| 42 lw_stringlist_t input_files; | |
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43 lw_stringlist_t includedirs; |
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44 lw_stringlist_t sysincludedirs; |
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45 lw_stringlist_t macrolist; |
| 295 | 46 |
| 47 /* various flags */ | |
| 48 int trigraphs = 0; | |
| 49 char *output_file = NULL; | |
| 50 FILE *output_fp = NULL; | |
| 51 | |
| 52 static struct lw_cmdline_options options[] = | |
| 53 { | |
| 54 { "output", 'o', "FILE", 0, "Output to FILE"}, | |
| 55 { "include", 'i', "FILE", 0, "Pre-include FILE" }, | |
| 56 { "includedir", 'I', "PATH", 0, "Add entry to the user include path" }, | |
| 57 { "sincludedir", 'S', "PATH", 0, "Add entry to the system include path" }, | |
| 58 { "define", 'D', "SYM[=VAL]",0, "Automatically define SYM to be VAL (or 1)"}, | |
| 59 { "trigraphs", 0x100, NULL, 0, "Enable interpretation of trigraphs" }, | |
| 60 { 0 } | |
| 61 }; | |
| 62 | |
| 63 static int parse_opts(int key, char *arg, void *state) | |
| 64 { | |
| 65 switch (key) | |
| 66 { | |
| 67 case 'o': | |
| 68 if (output_file) | |
| 69 do_error("Output file specified more than once."); | |
| 70 output_file = arg; | |
| 71 break; | |
| 72 | |
| 73 case 0x100: | |
| 74 trigraphs = 1; | |
| 75 break; | |
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76 |
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77 case 'I': |
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78 lw_stringlist_addstring(includedirs, arg); |
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79 break; |
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80 |
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81 case 'S': |
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82 lw_stringlist_addstring(sysincludedirs, arg); |
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83 break; |
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84 |
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85 case 'D': |
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86 lw_stringlist_addstring(macrolist, arg); |
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87 break; |
| 295 | 88 |
| 89 case lw_cmdline_key_end: | |
| 90 break; | |
| 91 | |
| 92 case lw_cmdline_key_arg: | |
| 93 lw_stringlist_addstring(input_files, arg); | |
| 94 break; | |
| 95 | |
| 96 default: | |
| 97 return lw_cmdline_err_unknown; | |
| 98 } | |
| 99 return 0; | |
| 100 } | |
| 101 | |
| 102 static struct lw_cmdline_parser cmdline_parser = | |
| 103 { | |
| 104 options, | |
| 105 parse_opts, | |
| 106 "INPUTFILE", | |
| 107 "lwcc-cpp - C preprocessor for lwcc", | |
| 108 PROGVER | |
| 109 }; | |
| 110 | |
| 111 int main(int argc, char **argv) | |
| 112 { | |
| 113 program_name = argv[0]; | |
| 114 int retval = 0; | |
| 115 | |
| 116 input_files = lw_stringlist_create(); | |
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117 includedirs = lw_stringlist_create(); |
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118 sysincludedirs = lw_stringlist_create(); |
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119 macrolist = lw_stringlist_create(); |
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120 |
| 295 | 121 /* parse command line arguments */ |
| 122 lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL); | |
| 123 | |
| 124 /* set up output file */ | |
| 125 if (output_file == NULL || strcmp(output_file, "-") == 0) | |
| 126 { | |
| 127 output_fp = stdout; | |
| 128 } | |
| 129 else | |
| 130 { | |
| 131 output_fp = fopen(output_file, "wb"); | |
| 132 if (output_fp == NULL) | |
| 133 { | |
| 134 do_error("Failed to create output file %s: %s", output_file, strerror(errno)); | |
| 135 } | |
| 136 } | |
| 137 | |
| 138 if (lw_stringlist_nstrings(input_files) == 0) | |
| 139 { | |
| 140 /* if no input files, work on stdin */ | |
| 141 retval = process_file("-"); | |
| 142 } | |
| 143 else | |
| 144 { | |
| 145 char *s; | |
| 146 lw_stringlist_reset(input_files); | |
| 147 for (s = lw_stringlist_current(input_files); s; s = lw_stringlist_next(input_files)) | |
| 148 { | |
| 149 retval = process_file(s); | |
| 150 if (retval != 0) | |
| 151 break; | |
| 152 } | |
| 153 } | |
| 154 lw_stringlist_destroy(input_files); | |
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155 lw_stringlist_destroy(includedirs); |
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156 lw_stringlist_destroy(sysincludedirs); |
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157 lw_stringlist_destroy(macrolist); |
| 295 | 158 exit(retval); |
| 159 } | |
| 160 | |
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161 static void print_line_marker(FILE *fp, int line, const char *fn, int flag) |
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162 { |
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163 fprintf(fp, "\n# %d \"", line); |
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164 while (*fn) |
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165 { |
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166 if (*fn < 32 || *fn == 34 || *fn > 126) |
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167 { |
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168 fprintf(fp, "\\%03o", *fn); |
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169 } |
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170 else |
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171 { |
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172 fprintf(fp, "%c", *fn); |
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173 } |
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174 fn++; |
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175 } |
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176 fprintf(fp, "\" %d", flag); |
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177 } |
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178 |
| 295 | 179 int process_file(const char *fn) |
| 180 { | |
| 181 struct preproc_info *pp; | |
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182 struct token *tok = NULL; |
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183 int last_line = 0; |
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184 char *last_fn = NULL; |
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185 char *tstr; |
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186 |
| 295 | 187 pp = preproc_init(fn); |
| 188 if (!pp) | |
| 189 return -1; | |
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190 |
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191 /* set up the include paths */ |
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192 lw_stringlist_reset(includedirs); |
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193 for (tstr = lw_stringlist_current(includedirs); tstr; tstr = lw_stringlist_next(includedirs)) |
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194 { |
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195 preproc_add_include(pp, tstr, 0); |
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196 } |
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197 |
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198 lw_stringlist_reset(sysincludedirs); |
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199 for (tstr = lw_stringlist_current(sysincludedirs); tstr; tstr = lw_stringlist_next(sysincludedirs)) |
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200 { |
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201 preproc_add_include(pp, tstr, 1); |
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202 } |
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203 |
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204 /* set up pre-defined macros */ |
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205 lw_stringlist_reset(macrolist); |
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206 for (tstr = lw_stringlist_current(macrolist); tstr; tstr = lw_stringlist_next(macrolist)) |
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207 { |
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208 preproc_add_macro(pp, tstr); |
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209 } |
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210 |
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211 print_line_marker(output_fp, 1, fn, 1); |
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212 last_fn = lw_strdup(fn); |
| 295 | 213 for (;;) |
| 214 { | |
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215 tok = preproc_next(pp); |
| 295 | 216 if (tok -> ttype == TOK_EOF) |
| 217 break; | |
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218 if (strcmp(tok -> fn, last_fn) != 0) |
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219 { |
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220 int lt = 1; |
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221 if (tok -> lineno != 1) |
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222 { |
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223 lt = 2; |
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224 } |
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225 lw_free(last_fn); |
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226 last_fn = lw_strdup(tok -> fn); |
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227 last_line = tok -> lineno; |
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228 print_line_marker(output_fp, last_line, last_fn, lt); |
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229 } |
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230 else |
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231 { |
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232 while (tok -> lineno > last_line) |
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233 { |
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234 fprintf(output_fp, "\n"); |
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235 last_line++; |
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236 } |
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237 } |
| 295 | 238 token_print(tok, output_fp); |
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239 if (tok -> ttype == TOK_EOL) |
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changeset
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240 last_line++; |
|
304
d85d173ba120
Checkpoint lwcc development - preprocessor is runnable but nonfunctional
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
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241 token_free(tok); |
| 295 | 242 } |
|
304
d85d173ba120
Checkpoint lwcc development - preprocessor is runnable but nonfunctional
William Astle <lost@l-w.ca>
parents:
295
diff
changeset
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243 token_free(tok); |
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305
54f213c8fb81
Various bugfixes and output tuning
William Astle <lost@l-w.ca>
parents:
304
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changeset
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244 lw_free(last_fn); |
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54f213c8fb81
Various bugfixes and output tuning
William Astle <lost@l-w.ca>
parents:
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changeset
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245 // symtab_dump(pp); |
| 295 | 246 preproc_finish(pp); |
| 247 return 0; | |
| 248 } | |
| 249 | |
| 250 static void do_error(const char *f, ...) | |
| 251 { | |
| 252 va_list args; | |
| 253 va_start(args, f); | |
| 254 fprintf(stderr, "ERROR: "); | |
| 255 vfprintf(stderr, f, args); | |
| 256 va_end(args); | |
| 257 fprintf(stderr, "\n"); | |
| 258 exit(1); | |
| 259 } |