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
38 * rpc_scan.c, Scanner for the RPC protocol compiler
39 * Copyright (C) 1987, Sun Microsystems, Inc.
45 #include "rpc_parse.h"
49 #define startcomment(where) (where[0] == '/' && where[1] == '*')
50 #define endcomment(where) (where[-1] == '*' && where[0] == '/')
52 static int pushed = 0; /* is a token pushed */
53 static token lasttok; /* last token, if pushed */
55 static void unget_token (token * tokp);
56 static void findstrconst (const char **str, const char **val);
57 static void findchrconst (const char **str, const char **val);
58 static void findconst (const char **str, const char **val);
59 static void findkind (const char **mark, token * tokp);
60 static int cppline (const char *line);
61 static int directive (const char *line);
62 static void printdirective (const char *line);
63 static void docppline (const char *line, int *lineno, const char **fname);
66 * scan expecting 1 given token
69 scan (tok_kind expect, token * tokp)
72 if (tokp->kind != expect)
77 * scan expecting any of the 2 given tokens
80 scan2 (tok_kind expect1, tok_kind expect2, token * tokp)
83 if (tokp->kind != expect1 && tokp->kind != expect2)
85 expected2 (expect1, expect2);
90 * scan expecting any of the 3 given token
93 scan3 (tok_kind expect1, tok_kind expect2, tok_kind expect3, token * tokp)
96 if (tokp->kind != expect1 && tokp->kind != expect2
97 && tokp->kind != expect3)
99 expected3 (expect1, expect2, expect3);
104 * scan expecting a constant, possibly symbolic
107 scan_num (token *tokp)
115 error (_("constant or identifier expected"));
120 * Peek at the next token
130 * Peek at the next token and scan it if it matches what you expect
133 peekscan (tok_kind expect, token *tokp)
136 if (tokp->kind == expect)
145 * Get the next token, printing out any directive that are encountered.
148 get_token (token *tokp)
165 if (!fgets (curline, MAXLINESIZE, fin))
167 tokp->kind = TOK_EOF;
177 else if (cppline (curline))
179 docppline (curline, &linenum,
182 else if (directive (curline))
184 printdirective (curline);
193 else if (isspace (*where))
195 while (isspace (*where))
202 for (where++; *where; where++)
204 if (endcomment (where))
212 else if (startcomment (where))
224 * 'where' is not whitespace, comment or directive Must be a token!
229 tokp->kind = TOK_COLON;
233 tokp->kind = TOK_SEMICOLON;
237 tokp->kind = TOK_COMMA;
241 tokp->kind = TOK_EQUAL;
245 tokp->kind = TOK_STAR;
249 tokp->kind = TOK_LBRACKET;
253 tokp->kind = TOK_RBRACKET;
257 tokp->kind = TOK_LBRACE;
261 tokp->kind = TOK_RBRACE;
265 tokp->kind = TOK_LPAREN;
269 tokp->kind = TOK_RPAREN;
273 tokp->kind = TOK_LANGLE;
277 tokp->kind = TOK_RANGLE;
282 tokp->kind = TOK_STRCONST;
283 findstrconst (&where, &tokp->str);
286 tokp->kind = TOK_CHARCONST;
287 findchrconst (&where, &tokp->str);
301 tokp->kind = TOK_IDENT;
302 findconst (&where, &tokp->str);
306 if (!(isalpha (*where) || *where == '_'))
311 s_print (buf, _("illegal character in file: "));
312 p = buf + strlen (buf);
313 if (isprint (*where))
315 s_print (p, "%c", *where);
319 s_print (p, "%d", *where);
323 findkind (&where, tokp);
329 unget_token (token * tokp)
336 findstrconst (const char **str, const char **val)
347 while (*p && *p != '"');
350 error (_("unterminated string constant"));
354 tmp = alloc (size + 1);
355 strncpy (tmp, *str, size);
362 findchrconst (const char **str, const char **val)
373 while (*p && *p != '\'');
376 error (_("unterminated string constant"));
382 error (_("empty char string"));
384 tmp = alloc (size + 1);
385 strncpy (tmp, *str, size);
392 findconst (const char **str, const char **val)
399 if (*p == '0' && *(p + 1) == 'x')
406 while (isxdigit (*p));
414 while (isdigit (*p));
417 tmp = alloc (size + 1);
418 strncpy (tmp, *str, size);
424 static const token symbols[] =
426 {TOK_CONST, "const"},
427 {TOK_UNION, "union"},
428 {TOK_SWITCH, "switch"},
430 {TOK_DEFAULT, "default"},
431 {TOK_STRUCT, "struct"},
432 {TOK_TYPEDEF, "typedef"},
434 {TOK_OPAQUE, "opaque"},
439 {TOK_UNSIGNED, "unsigned"},
440 {TOK_SHORT, "short"},
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"));