3 TREELANG Compiler almost main (tree1)
4 Called by GCC's toplev.c
6 Copyright (C) 1986, 87, 89, 92-96, 1997, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA.
23 In other words, you are welcome to use, share and improve this program.
24 You are forbidden to forbid anyone else to use, share and improve
25 what you give them. Help stamp out software-hoarding!
27 ---------------------------------------------------------------------------
29 Written by Tim Josling 1999, 2000, 2001, based in part on other
30 parts of the GCC compiler.
36 #include "coretypes.h"
43 #include "diagnostic.h"
48 extern int yyparse (void);
50 /* Linked list of symbols - all must be unique in treelang. */
52 static GTY(()) struct prod_token_parm_item *symbol_table = NULL;
54 /* Language for usage for messages. */
56 const char *const language_string = "TREELANG - sample front end for GCC ";
58 /* Local prototypes. */
62 /* Global variables. */
64 extern struct cbl_tree_struct_parse_tree_top* parse_tree_top;
70 /* Trace the parser. */
71 unsigned int option_parser_trace = 0;
73 /* Trace the lexical analysis. */
75 unsigned int option_lexer_trace = 0;
79 /* Local variables. */
81 unsigned char *in_fname = NULL; /* Input file name. */
83 /* This is 1 if we have output the version string. */
85 static int version_done = 0;
87 /* Variable nesting level. */
89 static unsigned int work_nesting_level = 0;
91 /* Process one switch - called by toplev.c. */
94 treelang_decode_option (num_options_left, first_option_left)
95 int num_options_left ATTRIBUTE_UNUSED;
96 char** first_option_left;
100 Process options - bear in mind I may get options that are really
101 meant for someone else (eg the main compiler) so I have to be very
106 if (first_option_left[0][0] != '-')
109 switch (first_option_left[0][1])
112 if (!strcmp (first_option_left[0],"--help"))
116 fputs (language_string, stdout);
117 fputs (version_string, stdout);
118 fputs ("\n", stdout);
121 fprintf (stdout, "Usage: tree1 [switches] -o output input\n");
125 if (!strcmp (first_option_left[0],"-v"))
129 fputs (language_string, stdout);
130 fputs (version_string, stdout);
131 fputs ("\n", stdout);
137 if (!strcmp (first_option_left[0],"-y"))
139 option_lexer_trace = 1;
140 option_parser_trace = 1;
144 if (!strcmp (first_option_left[0],"-fparser-trace"))
146 option_parser_trace = 1;
149 if (!strcmp (first_option_left[0],"-flexer-trace"))
151 option_lexer_trace = 1;
157 if (!strcmp (first_option_left[0],"-w"))
159 /* Tolerate this option but ignore it - we always put out
166 if (!strcmp (first_option_left[0],"-Wall"))
180 /* Language dependent parser setup. */
183 treelang_init (const char* filename)
185 /* Set up the declarations needed for this front end. */
190 /* Init decls etc. */
192 treelang_init_decl_processing ();
194 /* This error will not happen from GCC as it will always create a
196 if (!filename || (filename[0] == ' ') || (!filename[0]))
200 fprintf (stderr, "No input file specified, try --help for help\n");
207 yyin = fopen (filename, "r");
210 fprintf (stderr, "Unable to open input file %s\n", filename);
213 input_filename = filename;
214 return (char*) (in_fname = (unsigned char*)filename);
217 /* Language dependent wrapup. */
220 treelang_finish (void)
225 /* Parse a file. Debug flag doesn't seem to work. */
228 treelang_parse_file (int debug_flag ATTRIBUTE_UNUSED)
234 /* Allocate SIZE bytes and clear them. Not to be used for strings
235 which must go in stringpool. */
238 my_malloc (size_t size)
241 mem = ggc_alloc (size);
244 fprintf (stderr, "\nOut of memory\n");
247 memset (mem, 0, size);
251 /* Look up a name in PROD->SYMBOL_TABLE_NAME in the symbol table;
252 return the symbol table entry from the symbol table if found there,
255 struct prod_token_parm_item*
256 lookup_tree_name (struct prod_token_parm_item *prod)
258 struct prod_token_parm_item *this;
259 struct prod_token_parm_item *this_tok;
260 struct prod_token_parm_item *tok;
264 tok = SYMBOL_TABLE_NAME (prod);
267 for (this = symbol_table; this; this = this->tp.pro.next)
270 this_tok = this->tp.pro.main_token;
271 sanity_check (this_tok);
272 if (tok->tp.tok.length != this_tok->tp.tok.length)
274 if (memcmp (tok->tp.tok.chars, this_tok->tp.tok.chars, this_tok->tp.tok.length))
276 if (option_parser_trace)
277 fprintf (stderr, "Found symbol %s (%i:%i) as %i \n", tok->tp.tok.chars,
278 tok->tp.tok.lineno, tok->tp.tok.charno, NUMERIC_TYPE (this));
281 if (option_parser_trace)
282 fprintf (stderr, "Not found symbol %s (%i:%i) as %i \n", tok->tp.tok.chars,
283 tok->tp.tok.lineno, tok->tp.tok.charno, tok->type);
287 /* Insert name PROD into the symbol table. Return 1 if duplicate, 0 if OK. */
290 insert_tree_name (struct prod_token_parm_item *prod)
292 struct prod_token_parm_item *tok;
293 tok = SYMBOL_TABLE_NAME (prod);
295 if (lookup_tree_name (prod))
297 fprintf (stderr, "%s:%i:%i duplicate name %s\n", in_fname, tok->tp.tok.lineno,
298 tok->tp.tok.charno, tok->tp.tok.chars);
302 prod->tp.pro.next = symbol_table;
303 NESTING_LEVEL (prod) = work_nesting_level;
308 /* Create a struct productions of type TYPE, main token MAIN_TOK. */
310 struct prod_token_parm_item *
311 make_production (int type, struct prod_token_parm_item *main_tok)
313 struct prod_token_parm_item *prod;
314 prod = my_malloc (sizeof (struct prod_token_parm_item));
315 prod->category = production_category;
317 prod->tp.pro.main_token = main_tok;
321 /* Abort if ITEM is not a valid structure, based on 'category'. */
324 sanity_check (struct prod_token_parm_item *item)
326 switch (item->category)
329 case production_category:
330 case parameter_category:
338 /* New garbage collection regime see gty.texi. */
339 #include "gt-treelang-tree1.h"
340 /*#include "gt-treelang-treelang.h"*/
341 #include "gtype-treelang.h"