main.c 10 KB

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  1. /*
  2. * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
  3. * See the copyright notice in the ACK home directory, in the file "Copyright".
  4. */
  5. /* $Id$ */
  6. /* MAIN PROGRAM */
  7. #include "lint.h"
  8. #include "nofloat.h"
  9. #include <system.h>
  10. #include "nopp.h"
  11. #include "target_sizes.h"
  12. #include "debug.h"
  13. #include "use_tmp.h"
  14. #include "inputtype.h"
  15. #include "input.h"
  16. #include "level.h"
  17. #include "idf.h"
  18. #include "arith.h"
  19. #include "type.h"
  20. #include "declar.h"
  21. #include "tokenname.h"
  22. #include "Lpars.h"
  23. #include "LLlex.h"
  24. #include <alloc.h>
  25. #include "specials.h"
  26. #include "noRoption.h"
  27. #include "nocross.h"
  28. #include "sizes.h"
  29. #include "align.h"
  30. #include "assert.h"
  31. #include "macro.h"
  32. extern struct tokenname tkidf[], tkother[];
  33. extern char *symbol2str();
  34. extern char options[128];
  35. #ifndef NOPP
  36. int inc_pos = 1; /* place where next -I goes */
  37. int inc_total = 0;
  38. int inc_max;
  39. char **inctable;
  40. extern int do_dependencies;
  41. extern char *dep_file;
  42. static File *dep_fd = STDOUT;
  43. extern char *getwdir();
  44. #endif /* NOPP */
  45. struct sp_id special_ids[] = {
  46. {"setjmp", SP_SETJMP}, /* non-local goto's are registered */
  47. {0, 0}
  48. };
  49. #ifndef NOCROSS
  50. arith
  51. short_size = SZ_SHORT,
  52. word_size = SZ_WORD,
  53. dword_size = (2 * SZ_WORD),
  54. int_size = SZ_INT,
  55. long_size = SZ_LONG,
  56. #ifndef NOFLOAT
  57. float_size = SZ_FLOAT,
  58. double_size = SZ_DOUBLE,
  59. #endif /* NOFLOAT */
  60. pointer_size = SZ_POINTER;
  61. int
  62. short_align = AL_SHORT,
  63. word_align = AL_WORD,
  64. int_align = AL_INT,
  65. long_align = AL_LONG,
  66. #ifndef NOFLOAT
  67. float_align = AL_FLOAT,
  68. double_align = AL_DOUBLE,
  69. #endif /* NOFLOAT */
  70. pointer_align = AL_POINTER,
  71. struct_align = AL_STRUCT,
  72. union_align = AL_UNION;
  73. #endif /* NOCROSS */
  74. #ifndef NOPP
  75. arith ifval; /* ifval will contain the result of the #if expression */
  76. #endif /* NOPP */
  77. char *prog_name;
  78. main(argc, argv)
  79. char *argv[];
  80. {
  81. /* parse and interpret the command line options */
  82. prog_name = argv[0];
  83. init_hmask();
  84. #ifndef NOPP
  85. inctable = (char **) Malloc(10 * sizeof(char *));
  86. inctable[0] = "";
  87. inctable[1] = 0;
  88. inc_total = 3;
  89. inc_max = 10;
  90. init_pp(); /* initialise the preprocessor macros */
  91. #endif /* NOPP */
  92. /* Note: source file "-" indicates that the source is supplied
  93. as standard input. This is only allowed if INP_READ_IN_ONE is
  94. not defined!
  95. */
  96. #ifdef INP_READ_IN_ONE
  97. while (argc > 1 && *argv[1] == '-')
  98. #else /* INP_READ_IN_ONE */
  99. while (argc > 1 && *argv[1] == '-' && argv[1][1] != '\0')
  100. #endif /* INP_READ_IN_ONE */
  101. {
  102. char *par = &argv[1][1];
  103. do_option(par);
  104. argc--, argv++;
  105. }
  106. #ifdef LINT
  107. lint_init();
  108. #endif /* LINT */
  109. compile(argc - 1, &argv[1]);
  110. #ifdef DEBUG
  111. hash_stat();
  112. #endif /* DEBUG */
  113. #ifndef NOPP
  114. if (do_dependencies) {
  115. extern char *source;
  116. list_dependencies(source);
  117. }
  118. #endif
  119. sys_stop(err_occurred ? S_EXIT : S_END);
  120. /*NOTREACHED*/
  121. }
  122. #ifndef NOPP
  123. struct idf *file_head;
  124. extern char *strrchr();
  125. list_dependencies(source)
  126. char *source;
  127. {
  128. register struct idf *p = file_head;
  129. if (source) {
  130. register char *s = strrchr(source, '.');
  131. if (s && *(s+1)) {
  132. s++;
  133. *s++ = 'o';
  134. *s = '\0';
  135. /* the source may be in another directory than the
  136. * object generated, so don't include the pathname
  137. * leading to it.
  138. */
  139. if (s = strrchr(source, '/')) {
  140. source = s + 1;
  141. }
  142. }
  143. else source = 0;
  144. }
  145. if (dep_file && !sys_open(dep_file, OP_WRITE, &dep_fd)) {
  146. fatal("could not open %s", dep_file);
  147. }
  148. while (p) {
  149. ASSERT(p->id_resmac == K_FILE);
  150. dependency(p->id_text, source);
  151. p = (struct idf *) (p->id_file);
  152. }
  153. }
  154. add_dependency(s)
  155. char *s;
  156. {
  157. register struct idf *p = str2idf(s);
  158. if (! p->id_resmac) {
  159. p->id_resmac = K_FILE;
  160. p->id_file = (char *) file_head;
  161. file_head = p;
  162. }
  163. }
  164. dependency(s, source)
  165. char *s, *source;
  166. {
  167. if (options['i'] && !strncmp(s, "/usr/include/", 13)) {
  168. return;
  169. }
  170. if (options['m'] && source) {
  171. fprint(dep_fd, "%s: %s\n", source, s);
  172. }
  173. else fprint(dep_fd, "%s\n", s);
  174. }
  175. #endif /* NOPP */
  176. char *source = 0;
  177. char *nmlist = 0;
  178. compile(argc, argv)
  179. char *argv[];
  180. {
  181. char *result;
  182. #ifndef LINT
  183. register char *destination = 0;
  184. #endif /* LINT */
  185. #ifdef DEBUG
  186. #ifndef NOPP
  187. int pp_only = options['E'] || options['P'] || options['C'];
  188. #endif /* NOPP */
  189. #endif
  190. switch (argc) {
  191. case 1:
  192. #ifndef LINT
  193. #ifdef DEBUG
  194. #ifndef NOPP
  195. if (!pp_only)
  196. #endif /* NOPP */
  197. #endif
  198. fatal("%s: destination file not specified", prog_name);
  199. #endif /* LINT */
  200. break;
  201. #ifndef LINT
  202. case 2:
  203. destination = argv[1];
  204. break;
  205. case 3:
  206. nmlist = argv[2];
  207. destination = argv[1];
  208. break;
  209. #endif /* LINT */
  210. default:
  211. #ifndef LINT
  212. fatal("use: %s source destination [namelist]", prog_name);
  213. #else /* LINT */
  214. fatal("use: %s source", prog_name);
  215. #endif /* LINT */
  216. break;
  217. }
  218. if (strcmp(argv[0], "-"))
  219. FileName = source = argv[0];
  220. else {
  221. source = 0;
  222. FileName = "standard input";
  223. }
  224. if (!InsertFile(source, (char **) 0, &result)) /* read the source file */
  225. fatal("%s: no source file %s\n", prog_name, FileName);
  226. File_Inserted = 1;
  227. init();
  228. LineNumber = 0;
  229. nestlow = -1;
  230. #ifndef LINT
  231. init_code(destination && strcmp(destination, "-") != 0 ?
  232. destination : 0);
  233. #endif
  234. #ifndef NOPP
  235. WorkingDir = getwdir(source);
  236. #endif /* NOPP */
  237. PushLex(); /* initialize lex machine */
  238. #ifdef DEBUG
  239. #ifndef NOPP
  240. if (pp_only) /* run the preprocessor as if it is stand-alone */
  241. preprocess();
  242. else
  243. #endif /* NOPP */
  244. #endif /* DEBUG */
  245. {
  246. #ifndef LINT
  247. /* compile the source text */
  248. C_program();
  249. #ifdef PREPEND_SCOPES
  250. prepend_scopes();
  251. #endif /* PREPEND_SCOPES */
  252. end_code();
  253. #else /* LINT */
  254. /* lint the source text */
  255. C_program();
  256. #endif /* LINT */
  257. #ifdef DEBUG
  258. if (options['u']) {
  259. unstack_level(); /* unstack L_GLOBAL */
  260. }
  261. if (options['f'] || options['t'])
  262. dumpidftab("end of main", options['f'] ? 0 : 0);
  263. #endif /* DEBUG */
  264. }
  265. PopLex();
  266. }
  267. init()
  268. {
  269. init_cst(); /* initialize variables of "cstoper.c" */
  270. reserve(tkidf); /* mark the C reserved words as such */
  271. init_specials(special_ids); /* mark special ids as such */
  272. #ifndef NOROPTION
  273. if (options['R'])
  274. reserve(tkother);
  275. #endif
  276. char_type = standard_type(CHAR, 0, 1, (arith)1);
  277. uchar_type = standard_type(CHAR, UNSIGNED, 1, (arith)1);
  278. short_type = standard_type(SHORT, 0, short_align, short_size);
  279. ushort_type = standard_type(SHORT, UNSIGNED, short_align, short_size);
  280. /* Treat type `word' as `int', having its own size and
  281. alignment requirements.
  282. This type is transparent to the user.
  283. */
  284. word_type = standard_type(INT, 0, word_align, word_size);
  285. uword_type = standard_type(INT, UNSIGNED, word_align, word_size);
  286. int_type = standard_type(INT, 0, int_align, int_size);
  287. uint_type = standard_type(INT, UNSIGNED, int_align, int_size);
  288. long_type = standard_type(LONG, 0, long_align, long_size);
  289. ulong_type = standard_type(LONG, UNSIGNED, long_align, long_size);
  290. #ifndef NOFLOAT
  291. float_type = standard_type(FLOAT, 0, float_align, float_size);
  292. double_type = standard_type(DOUBLE, 0, double_align, double_size);
  293. #endif /* NOFLOAT */
  294. void_type = standard_type(VOID, 0, 1, (arith)0);
  295. label_type = standard_type(LABEL, 0, 0, (arith)0);
  296. error_type = standard_type(ERRONEOUS, 0, 1, (arith)1);
  297. /* Pointer Arithmetic type: all arithmetics concerning
  298. pointers is supposed to be performed in the
  299. pointer arithmetic type which is equal to either
  300. int_type or long_type, depending on the pointer_size
  301. */
  302. if ((int)pointer_size == (int)word_size)
  303. pa_type = word_type;
  304. else
  305. if ((int)pointer_size == (int)short_size)
  306. pa_type = short_type;
  307. else
  308. if ((int)pointer_size == (int)int_size)
  309. pa_type = int_type;
  310. else
  311. if ((int)pointer_size == (int)long_size)
  312. pa_type = long_type;
  313. else
  314. fatal("pointer size incompatible with any integral size");
  315. if ((int)int_size != (int)word_size)
  316. fatal("int_size and word_size are not equal");
  317. if ((int)short_size > (int)int_size || (int)int_size > (int)long_size)
  318. fatal("sizes of short/int/long decreasing");
  319. /* Build a type for function returning int, RM 13 */
  320. funint_type = construct_type(FUNCTION, int_type, (arith)0);
  321. string_type = construct_type(POINTER, char_type, (arith)0);
  322. /* Define the standard type identifiers. */
  323. add_def(str2idf("char"), TYPEDEF, char_type, L_UNIVERSAL);
  324. add_def(str2idf("int"), TYPEDEF, int_type, L_UNIVERSAL);
  325. #ifndef NOFLOAT
  326. add_def(str2idf("float"), TYPEDEF, float_type, L_UNIVERSAL);
  327. add_def(str2idf("double"), TYPEDEF, double_type, L_UNIVERSAL);
  328. #endif /* NOFLOAT */
  329. add_def(str2idf("void"), TYPEDEF, void_type, L_UNIVERSAL);
  330. stack_level();
  331. }
  332. init_specials(si)
  333. register struct sp_id *si;
  334. {
  335. while (si->si_identifier) {
  336. struct idf *idf = str2idf(si->si_identifier);
  337. if (idf->id_special)
  338. fatal("maximum identifier length insufficient");
  339. idf->id_special = si->si_flag;
  340. si++;
  341. }
  342. }
  343. #ifdef DEBUG
  344. #ifndef NOPP
  345. preprocess()
  346. {
  347. /* preprocess() is the "stand-alone" preprocessor which
  348. consecutively calls the lexical analyzer LLlex() to get
  349. the tokens and prints them in a suitable way.
  350. */
  351. static unsigned int lastlineno = 0;
  352. static char *lastfilenm = "";
  353. while (LLlex() != EOI) {
  354. if (lastlineno != dot.tk_line) {
  355. if (strcmp(lastfilenm, dot.tk_file) == 0) {
  356. if (dot.tk_line - lastlineno <= 1) {
  357. lastlineno++;
  358. print("\n");
  359. }
  360. else {
  361. lastlineno = dot.tk_line;
  362. if (!options['P'])
  363. print("\n#line %ld \"%s\"\n",
  364. lastlineno,
  365. lastfilenm
  366. );
  367. }
  368. }
  369. else {
  370. lastfilenm = dot.tk_file;
  371. lastlineno = dot.tk_line;
  372. if (!options['P'])
  373. print("\n#line %ld \"%s\"\n",
  374. lastlineno, lastfilenm);
  375. }
  376. }
  377. else
  378. if (strcmp(lastfilenm, dot.tk_file) != 0) {
  379. lastfilenm = dot.tk_file;
  380. if (!options['P'])
  381. print("\n#line %ld \"%s\"\n",
  382. lastlineno, lastfilenm);
  383. }
  384. switch (DOT) {
  385. case IDENTIFIER:
  386. case TYPE_IDENTIFIER:
  387. print("%s ", dot.tk_idf->id_text);
  388. break;
  389. case STRING:
  390. {
  391. char sbuf[1024]; /* a transient buffer */
  392. char *bts2str();
  393. print("\"%s\" ", bts2str(dot.tk_bts, dot.tk_len, sbuf));
  394. break;
  395. }
  396. case INTEGER:
  397. print("%ld ", dot.tk_ival);
  398. break;
  399. #ifndef NOFLOAT
  400. case FLOATING:
  401. print("%s ", dot.tk_fval);
  402. break;
  403. #endif /* NOFLOAT */
  404. case EOI:
  405. case EOF:
  406. return;
  407. default: /* very expensive... */
  408. print("%s ", symbol2str(DOT));
  409. }
  410. }
  411. }
  412. #endif /* NOPP */
  413. #endif /* DEBUG */
  414. void
  415. No_Mem() /* called by alloc package */
  416. {
  417. fatal("out of memory");
  418. }
  419. void
  420. C_failed() /* called by EM_code module */
  421. {
  422. fatal("write failed");
  423. }