1 /* rclex.c -- lexer for Windows rc files parser */
3 /* Copyright 1997, 1998, 1999, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 Written by Kai Tietz, Onevision.
8 This file is part of GNU Binutils.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
26 /* This is a lexer used by the Windows rc file parser. It basically
27 just recognized a bunch of keywords. */
32 #include "libiberty.h"
33 #include "safe-ctype.h"
39 /* Whether we are in rcdata mode, in which we returns the lengths of
42 static int rcdata_mode;
44 /* Whether we are supressing lines from cpp (including windows.h or
45 headers from your C sources may bring in externs and typedefs).
46 When active, we return IGNORED_TOKEN, which lets us ignore these
47 outside of resource constructs. Thus, it isn't required to protect
48 all the non-preprocessor lines in your header files with #ifdef
49 RC_INVOKED. It also means your RC file can't include other RC
50 files if they're named "*.h". Sorry. Name them *.rch or whatever. */
52 static int suppress_cpp_data;
54 #define IGNORE_CPP(x) (suppress_cpp_data ? IGNORED_TOKEN : (x))
56 /* The first filename we detect in the cpp output. We use this to
57 tell included files from the original file. */
59 static char *initial_fn;
61 /* List of allocated strings. */
65 struct alloc_string *next;
69 static struct alloc_string *strings;
77 #define K(KEY) { #KEY, KEY }
78 #define KRT(KEY) { #KEY, RT_##KEY }
80 static const struct rclex_keywords keywds[] =
82 K(ACCELERATORS), K(ALT), K(ANICURSOR), K(ANIICON), K(ASCII),
83 K(AUTO3STATE), K(AUTOCHECKBOX), K(AUTORADIOBUTTON),
84 K(BEDIT), { "BEGIN", BEG }, K(BITMAP), K(BLOCK), K(BUTTON),
85 K(CAPTION), K(CHARACTERISTICS), K(CHECKBOX), K(CHECKED),
86 K(CLASS), K(COMBOBOX), K(CONTROL), K(CTEXT), K(CURSOR),
87 K(DEFPUSHBUTTON), K(DIALOG), K(DIALOGEX), K(DISCARDABLE),
88 K(DLGINCLUDE), K(DLGINIT),
89 K(EDITTEXT), K(END), K(EXSTYLE),
90 K(FILEFLAGS), K(FILEFLAGSMASK), K(FILEOS), K(FILESUBTYPE),
91 K(FILETYPE), K(FILEVERSION), K(FIXED), K(FONT), K(FONTDIR),
92 K(GRAYED), KRT(GROUP_CURSOR), KRT(GROUP_ICON), K(GROUPBOX),
93 K(HEDIT), K(HELP), K(HTML),
94 K(ICON), K(IEDIT), K(IMPURE), K(INACTIVE),
95 K(LANGUAGE), K(LISTBOX), K(LOADONCALL), K(LTEXT),
96 K(MANIFEST), K(MENU), K(MENUBARBREAK), K(MENUBREAK),
97 K(MENUEX), K(MENUITEM), K(MESSAGETABLE), K(MOVEABLE),
99 K(PLUGPLAY), K(POPUP), K(PRELOAD), K(PRODUCTVERSION),
100 K(PURE), K(PUSHBOX), K(PUSHBUTTON),
101 K(RADIOBUTTON), K(RCDATA), K(RTEXT),
102 K(SCROLLBAR), K(SEPARATOR), K(SHIFT), K(STATE3),
103 K(STRINGTABLE), K(STYLE),
106 K(VALUE), { "VERSION", VERSIONK }, K(VERSIONINFO),
111 /* External input stream from resrc */
112 extern FILE *cpp_pipe;
114 /* Lexical scanner helpers. */
115 static int rclex_lastch = -1;
116 static size_t rclex_tok_max = 0;
117 static size_t rclex_tok_pos = 0;
118 static char *rclex_tok = NULL;
121 rclex_translatekeyword (const char *key)
123 if (key && ISUPPER (key[0]))
125 const struct rclex_keywords *kw = &keywds[0];
129 if (! strcmp (kw->name, key))
133 while (kw->name != NULL);
138 /* Handle a C preprocessor line. */
143 const char *s = rclex_tok;
152 /* Check for #pragma code_page ( DEFAULT | <nr>). */
154 mlen = strlen ("pragma");
155 if (len > mlen && memcmp (s, "pragma", mlen) == 0 && ISSPACE (s[mlen]))
163 mlen = strlen ("code_page");
164 if (len <= mlen || memcmp (s, "code_page", mlen) != 0)
165 /* FIXME: We ought to issue a warning message about an unrecognised pragma. */
171 /* FIXME: We ought to issue an error message about a malformed pragma. */
176 if (*s == 0 || (end = strchr (s, ')')) == NULL)
177 /* FIXME: We ought to issue an error message about a malformed pragma. */
179 len = (size_t) (end - s);
180 fn = xmalloc (len + 1);
184 while (len > 0 && (fn[len - 1] > 0 && fn[len - 1] <= 0x20))
186 if (! len || (len == strlen ("DEFAULT") && strcasecmp (fn, "DEFAULT") == 0))
187 wind_current_codepage = wind_default_codepage;
192 if (fn[0] == '0' && (fn[1] == 'x' || fn[1] == 'X'))
193 ncp = (rc_uint_type) strtol (fn + 2, NULL, 16);
195 ncp = (rc_uint_type) strtol (fn, NULL, 10);
196 if (ncp == CP_UTF16 || ! unicode_is_valid_codepage (ncp))
197 fatal (_("invalid value specified for pragma code_page.\n"));
198 wind_current_codepage = ncp;
204 line = strtol (s, &send, 0);
205 if (*send != '\0' && ! ISSPACE (*send))
208 /* Subtract 1 because we are about to count the newline. */
209 rc_lineno = line - 1;
219 send = strchr (s, '"');
223 fn = xmalloc (send - s + 1);
224 strncpy (fn, s, send - s);
232 initial_fn = xmalloc (strlen (fn) + 1);
233 strcpy (initial_fn, fn);
236 /* Allow the initial file, regardless of name. Suppress all other
237 files if they end in ".h" (this allows included "*.rc"). */
238 if (strcmp (initial_fn, fn) == 0
239 || strcmp (fn + strlen (fn) - 2, ".h") != 0)
240 suppress_cpp_data = 0;
242 suppress_cpp_data = 1;
245 /* Allocate a string of a given length. */
250 struct alloc_string *as;
252 as = xmalloc (sizeof *as);
253 as->s = xmalloc (len);
261 /* Handle a quoted string. The quotes are stripped. A pair of quotes
262 in a string are turned into a single quote. Adjacent strings are
263 merged separated by whitespace are merged, as in C. */
266 handle_quotes (rc_uint_type *len)
268 const char *input = rclex_tok;
274 ret = get_string (strlen (input) + 1);
288 rcparse_warning ("backslash at end of string");
292 rcparse_warning ("use \"\" to put \" in a string");
298 *s++ = ESCAPE_B; /* Strange, but true... */
336 case '0': case '1': case '2': case '3':
337 case '4': case '5': case '6': case '7':
340 if (*t >= '0' && *t <= '7')
342 ch = (ch << 3) | (*t - '0');
344 if (*t >= '0' && *t <= '7')
346 ch = (ch << 3) | (*t - '0');
356 /* We only handle single byte chars here. Make sure
357 we finish an escape sequence like "/xB0ABC" after
358 the first two digits. */
360 while (num_xdigits--)
362 if (*t >= '0' && *t <= '9')
363 ch = (ch << 4) | (*t - '0');
364 else if (*t >= 'a' && *t <= 'f')
365 ch = (ch << 4) | (*t - 'a' + 10);
366 else if (*t >= 'A' && *t <= 'F')
367 ch = (ch << 4) | (*t - 'A' + 10);
376 rcparse_warning ("unrecognized escape sequence");
384 else if (t[1] == '\0')
386 else if (t[1] == '"')
395 rcparse_warning ("unexpected character after '\"'");
416 /* Allocate a unicode string of a given length. */
419 get_unistring (int len)
421 return (unichar *) get_string (len * sizeof (unichar));
424 /* Handle a quoted unicode string. The quotes are stripped. A pair of quotes
425 in a string are turned into a single quote. Adjacent strings are
426 merged separated by whitespace are merged, as in C. */
429 handle_uniquotes (rc_uint_type *len)
431 const char *input = rclex_tok;
437 ret = get_unistring (strlen (input) + 1);
441 if ((*t == 'L' || *t == 'l') && t[1] == '"')
453 rcparse_warning ("backslash at end of string");
457 rcparse_warning ("use \"\" to put \" in a string");
461 *s++ = ESCAPE_B; /* Strange, but true... */
496 *s++ = (unichar) *t++;
499 case '0': case '1': case '2': case '3':
500 case '4': case '5': case '6': case '7':
503 if (*t >= '0' && *t <= '7')
505 ch = (ch << 3) | (*t - '0');
507 if (*t >= '0' && *t <= '7')
509 ch = (ch << 3) | (*t - '0');
519 /* We only handle two byte chars here. Make sure
520 we finish an escape sequence like "/xB0ABC" after
521 the first two digits. */
523 while (num_xdigits--)
525 if (*t >= '0' && *t <= '9')
526 ch = (ch << 4) | (*t - '0');
527 else if (*t >= 'a' && *t <= 'f')
528 ch = (ch << 4) | (*t - 'a' + 10);
529 else if (*t >= 'A' && *t <= 'F')
530 ch = (ch << 4) | (*t - 'A' + 10);
539 rcparse_warning ("unrecognized escape sequence");
541 *s++ = (unichar) *t++;
546 *s++ = (unichar) *t++;
547 else if (t[1] == '\0')
549 else if (t[1] == '"')
557 assert (ISSPACE (*t));
578 /* Discard all the strings we have allocated. The parser calls this
579 when it no longer needs them. */
582 rcparse_discard_strings (void)
584 struct alloc_string *as;
589 struct alloc_string *n;
600 /* Enter rcdata mode. */
602 rcparse_rcdata (void)
607 /* Go back to normal mode from rcdata mode. */
609 rcparse_normal (void)
615 rclex_tok_add_char (int ch)
617 if (! rclex_tok || rclex_tok_max <= rclex_tok_pos)
619 char *h = xmalloc (rclex_tok_max + 9);
625 memcpy (h, rclex_tok, rclex_tok_pos + 1);
634 rclex_tok[rclex_tok_pos++] = (char) ch;
635 rclex_tok[rclex_tok_pos] = 0;
643 if ((r = rclex_lastch) != -1)
650 if (! cpp_pipe || feof (cpp_pipe)
651 || fread (&ch, 1, 1,cpp_pipe) != 1)
653 r = ((int) ch) & 0xff;
655 while (r == 0 || r == '\r');
657 rclex_tok_add_char (r);
666 if ((r = rclex_lastch) == -1)
668 if ((r = rclex_readch ()) != -1)
671 if (rclex_tok_pos > 0)
672 rclex_tok[--rclex_tok_pos] = 0;
683 while ((c = rclex_peekch ()) != -1)
690 if ((c = rclex_peekch ()) == -1 || c == '\n')
694 else if (rclex_readch () == '"')
697 Skip any whitespace after the end of the double quotes. */
708 if (rclex_peekch () == '"')
719 rc_uint_type base = 10;
720 rc_uint_type ret, val;
727 switch (rclex_peekch ())
741 ret = (rc_uint_type) (ch - '0');
742 while ((ch = rclex_peekch ()) != -1)
745 val = (rc_uint_type) (ch - '0');
746 else if (ch >= 'a' && ch <= 'f')
747 val = (rc_uint_type) ((ch - 'a') + 10);
748 else if (ch >= 'A' && ch <= 'F')
749 val = (rc_uint_type) ((ch - 'A') + 10);
753 if (! warned && val >= base)
756 rcparse_warning ("digit exceeds base");
764 /* yyparser entry method. */
774 /* Make sure that rclex_tok is initialized. */
776 rclex_tok_add_char (-1);
786 if ((ch = rclex_readch ()) == -1)
796 while ((ch = rclex_peekch ()) != -1 && ch != '\n')
803 ch = IGNORE_CPP (BEG);
807 ch = IGNORE_CPP (END);
810 case '0': case '1': case '2': case '3': case '4':
811 case '5': case '6': case '7': case '8': case '9':
812 yylval.i.val = read_digit (ch);
814 switch (rclex_peekch ())
821 ch = IGNORE_CPP (NUMBER);
825 ch = IGNORE_CPP ((! rcdata_mode ? QUOTEDSTRING : SIZEDSTRING));
826 if (ch == IGNORED_TOKEN)
828 s = handle_quotes (&length);
833 yylval.ss.length = length;
838 if (rclex_peekch () == '"')
842 ch = IGNORE_CPP ((! rcdata_mode ? QUOTEDUNISTRING : SIZEDUNISTRING));
843 if (ch == IGNORED_TOKEN)
845 us = handle_uniquotes (&length);
850 yylval.suni.length = length;
857 if (ISIDST (ch) || ch=='$')
859 while ((ch = rclex_peekch ()) != -1
860 && (ISIDNUM (ch) || ch == '$' || ch == '.'
861 || ch == ':' || ch == '\\' || ch == '/'
862 || ch == '_' || ch == '-')
865 ch = IGNORE_CPP (rclex_translatekeyword (rclex_tok));
868 s = get_string (strlen (rclex_tok) + 1);
869 strcpy (s, rclex_tok);
872 else if (ch == BLOCK)
874 const char *hs = NULL;
883 hs = yylval.s = yylval.ss.s;
888 rcparse_warning ("BLOCK expects a string as argument.");
891 else if (! strcmp (hs, "StringFileInfo"))
892 ch = BLOCKSTRINGFILEINFO;
893 else if (! strcmp (hs, "VarFileInfo"))
894 ch = BLOCKVARFILEINFO;
898 ch = IGNORE_CPP (ch);
902 while (ch == IGNORED_TOKEN);