2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user or with the express written consent of
8 * Sun Microsystems, Inc.
10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 * Sun RPC is provided with no support and without any obligation on the
15 * part of Sun Microsystems, Inc. to assist in its use, correction,
16 * modification or enhancement.
18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
20 * OR ANY PART THEREOF.
22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
23 * or profits or other special, indirect and consequential damages, even if
24 * Sun has been advised of the possibility of such damages.
26 * Sun Microsystems, Inc.
28 * Mountain View, California 94043
32 * From: @(#)rpc_scan.c 1.11 89/02/22 (C) 1987 SMI
36 * rpc_scan.c, Scanner for the RPC protocol compiler
37 * Copyright (C) 1987, Sun Microsystems, Inc.
44 #include "rpc_parse.h"
48 #define startcomment(where) (where[0] == '/' && where[1] == '*')
49 #define endcomment(where) (where[-1] == '*' && where[0] == '/')
51 static int pushed = 0; /* is a token pushed */
52 static token lasttok; /* last token, if pushed */
54 static void unget_token (token * tokp);
55 static void findstrconst (const char **str, const char **val);
56 static void findchrconst (const char **str, const char **val);
57 static void findconst (const char **str, const char **val);
58 static void findkind (const char **mark, token * tokp);
59 static int cppline (const char *line);
60 static int directive (const char *line);
61 static void printdirective (const char *line);
62 static void docppline (const char *line, int *lineno, const char **fname);
65 * scan expecting 1 given token
68 scan (tok_kind expect, token * tokp)
71 if (tokp->kind != expect)
76 * scan expecting any of the 2 given tokens
79 scan2 (tok_kind expect1, tok_kind expect2, token * tokp)
82 if (tokp->kind != expect1 && tokp->kind != expect2)
84 expected2 (expect1, expect2);
89 * scan expecting any of the 3 given token
92 scan3 (tok_kind expect1, tok_kind expect2, tok_kind expect3, token * tokp)
95 if (tokp->kind != expect1 && tokp->kind != expect2
96 && tokp->kind != expect3)
98 expected3 (expect1, expect2, expect3);
103 * scan expecting a constant, possibly symbolic
106 scan_num (token *tokp)
114 error (_("constant or identifier expected"));
119 * Peek at the next token
129 * Peek at the next token and scan it if it matches what you expect
132 peekscan (tok_kind expect, token *tokp)
135 if (tokp->kind == expect)
144 * Get the next token, printing out any directive that are encountered.
147 get_token (token *tokp)
164 if (!fgets (curline, MAXLINESIZE, fin))
166 tokp->kind = TOK_EOF;
176 else if (cppline (curline))
178 docppline (curline, &linenum,
181 else if (directive (curline))
183 printdirective (curline);
192 else if (isspace (*where))
194 while (isspace (*where))
201 for (where++; *where; where++)
203 if (endcomment (where))
211 else if (startcomment (where))
223 * 'where' is not whitespace, comment or directive Must be a token!
228 tokp->kind = TOK_COLON;
232 tokp->kind = TOK_SEMICOLON;
236 tokp->kind = TOK_COMMA;
240 tokp->kind = TOK_EQUAL;
244 tokp->kind = TOK_STAR;
248 tokp->kind = TOK_LBRACKET;
252 tokp->kind = TOK_RBRACKET;
256 tokp->kind = TOK_LBRACE;
260 tokp->kind = TOK_RBRACE;
264 tokp->kind = TOK_LPAREN;
268 tokp->kind = TOK_RPAREN;
272 tokp->kind = TOK_LANGLE;
276 tokp->kind = TOK_RANGLE;
281 tokp->kind = TOK_STRCONST;
282 findstrconst (&where, &tokp->str);
285 tokp->kind = TOK_CHARCONST;
286 findchrconst (&where, &tokp->str);
300 tokp->kind = TOK_IDENT;
301 findconst (&where, &tokp->str);
305 if (!(isalpha (*where) || *where == '_'))
310 s_print (buf, _("illegal character in file: "));
311 p = buf + strlen (buf);
312 if (isprint (*where))
314 s_print (p, "%c", *where);
318 s_print (p, "%d", *where);
322 findkind (&where, tokp);
328 unget_token (token * tokp)
335 findstrconst (const char **str, const char **val)
346 while (*p && *p != '"');
349 error (_("unterminated string constant"));
353 tmp = alloc (size + 1);
354 strncpy (tmp, *str, size);
361 findchrconst (const char **str, const char **val)
372 while (*p && *p != '\'');
375 error (_("unterminated string constant"));
381 error (_("empty char string"));
383 tmp = alloc (size + 1);
384 strncpy (tmp, *str, size);
391 findconst (const char **str, const char **val)
398 if (*p == '0' && *(p + 1) == 'x')
405 while (isxdigit (*p));
413 while (isdigit (*p));
416 tmp = alloc (size + 1);
417 strncpy (tmp, *str, size);
423 static const token symbols[] =
425 {TOK_CONST, "const"},
426 {TOK_UNION, "union"},
427 {TOK_SWITCH, "switch"},
429 {TOK_DEFAULT, "default"},
430 {TOK_STRUCT, "struct"},
431 {TOK_TYPEDEF, "typedef"},
433 {TOK_OPAQUE, "opaque"},
438 {TOK_UNSIGNED, "unsigned"},
439 {TOK_SHORT, "short"},
441 {TOK_HYPER, "hyper"},
442 {TOK_FLOAT, "float"},
443 {TOK_DOUBLE, "double"},
444 {TOK_STRING, "string"},
445 {TOK_PROGRAM, "program"},
446 {TOK_VERSION, "version"},
451 findkind (const char **mark, token *tokp)
459 for (s = symbols; s->kind != TOK_EOF; s++)
461 len = strlen (s->str);
462 if (strncmp (str, s->str, len) == 0)
464 if (!isalnum (str[len]) && str[len] != '_')
466 tokp->kind = s->kind;
473 tokp->kind = TOK_IDENT;
474 for (len = 0; isalnum (str[len]) || str[len] == '_'; len++);
475 tmp = alloc (len + 1);
476 strncpy (tmp, str, len);
483 cppline (const char *line)
485 return line == curline && *line == '#';
489 directive (const char *line)
491 return line == curline && *line == '%';
495 printdirective (const char *line)
497 f_print (fout, "%s", line + 1);
501 docppline (const char *line, int *lineno, const char **fname)
508 while (isspace (*line))
513 while (isdigit (*line))
517 while (isspace (*line))
523 error (_("preprocessor error"));
526 p = file = alloc (strlen (line) + 1);
527 while (*line && *line != '"')
533 error (_("preprocessor error"));