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/* -*- c -*- = mode for emacs editor
 
   TREELANG lexical analysis
 
   ---------------------------------------------------------------------
 
   Copyright (C) 1986, 87, 89, 92-96, 1997, 1999, 2000, 2001, 2002, 2003,
   2004, 2005, 2007 Free Software Foundation, Inc.
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 3, or (at your option) any
   later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; see the file COPYING3.  If not see
   .
 
   In other words, you are welcome to use, share and improve this program.
   You are forbidden to forbid anyone else to use, share and improve
   what you give them.   Help stamp out software-hoarding!
 
   ---------------------------------------------------------------------
 
   Written by Tim Josling 1999-2001, based in part on other parts of
   the GCC compiler.  */
 
%{
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "input.h"
#include "tree.h"
 
/* Token defs.  */
#include "treelang.h"
#include "parse.h"
#include "treetree.h"
#include "toplev.h"
 
extern int option_lexer_trace;
 
int yylex (void);
void update_yylval (int a);
 
static int next_tree_charno = 1;
static int lineno = 1;
 
static void update_lineno_charno (void);
static void dump_lex_value (int lexret);
 
#define SAVE_RETURN(a) {update_yylval (a); if (option_lexer_trace)\
   {fprintf (stderr, "\nlexer returning"); dump_lex_value (a);} return a;}
#define NOT_RETURN(a) {update_yylval (a); if (option_lexer_trace)\
   {fprintf (stderr, "\nlexer swallowing"); dump_lex_value (a);}}
#ifndef USE_MAPPED_LOCATION
#undef LINEMAP_POSITION_FOR_COLUMN
#define LINEMAP_POSITION_FOR_COLUMN(INPUT, LINETABLE, COL)
#endif
%}
 
%option nostack
%option nounput
%option noyywrap
%option pointer
%option nodefault
 
%%
 
 {
   /* ??? Should really allocate only what we need.  */
   yylval = my_malloc (sizeof (struct prod_token_parm_item));
   LINEMAP_POSITION_FOR_COLUMN (input_location, &line_table,
                                next_tree_charno);
   ((struct prod_token_parm_item *)yylval)->tp.tok.location = input_location;
   ((struct prod_token_parm_item *)yylval)->tp.tok.charno = next_tree_charno;
 }
 
[ \n\t]+ {
  update_lineno_charno ();
  NOT_RETURN (WHITESPACE);
}
 
"//".*  {
  /* Comment.  */
  update_lineno_charno ();
  NOT_RETURN (COMMENT);
}
 
"{" {
  update_lineno_charno ();
  SAVE_RETURN (LEFT_BRACE);
}
 
"}" {
  update_lineno_charno ();
  SAVE_RETURN (RIGHT_BRACE);
}
 
"(" {
  update_lineno_charno ();
  SAVE_RETURN (LEFT_PARENTHESIS);
}
 
")" {
  update_lineno_charno ();
  SAVE_RETURN (RIGHT_PARENTHESIS);
}
 
"," {
  update_lineno_charno ();
  SAVE_RETURN (COMMA);
}
 
";" {
  update_lineno_charno ();
  SAVE_RETURN (SEMICOLON);
}
 
"+" {
  update_lineno_charno ();
  SAVE_RETURN (tl_PLUS);
}
 
"-" {
  update_lineno_charno ();
  SAVE_RETURN (tl_MINUS);
}
 
"=" {
  update_lineno_charno ();
  SAVE_RETURN (ASSIGN);
}
 
"==" {
  update_lineno_charno ();
  SAVE_RETURN (EQUALS);
}
 
[+-]?[0-9]+ {
  update_lineno_charno ();
  SAVE_RETURN (INTEGER);
}
 
"external_reference" {
  update_lineno_charno ();
  SAVE_RETURN (EXTERNAL_REFERENCE);
}
 
"external_definition" {
  update_lineno_charno ();
  SAVE_RETURN (EXTERNAL_DEFINITION);
}
 
"static" {
  update_lineno_charno ();
  SAVE_RETURN (STATIC);
}
 
"automatic" {
  update_lineno_charno ();
  SAVE_RETURN (AUTOMATIC);
}
 
"int" {
  update_lineno_charno ();
  SAVE_RETURN (INT);
}
 
"char" {
  update_lineno_charno ();
  SAVE_RETURN (CHAR);
}
 
"void" {
  update_lineno_charno ();
  SAVE_RETURN (VOID);
}
 
"unsigned" {
  update_lineno_charno ();
  SAVE_RETURN (UNSIGNED);
}
 
"return" {
  update_lineno_charno ();
  SAVE_RETURN (tl_RETURN);
}
 
"if" {
  update_lineno_charno ();
  SAVE_RETURN (IF);
}
 
"else" {
  update_lineno_charno ();
  SAVE_RETURN (ELSE);
}
 
[A-Za-z_]+[A-Za-z_0-9]* {
  update_lineno_charno ();
  update_yylval (NAME);
  if (option_lexer_trace)
    {
      fprintf (stderr, "\nlexer returning");
      dump_lex_value (NAME);
    }
  return NAME;
}
 
[^\n]  {
  update_lineno_charno ();
  error ("%HUnrecognized character %qc.",
         &((struct prod_token_parm_item *)yylval)->tp.tok.location,
         yytext[0]);
}
 
%%
 
/*
   Update line number (1-) and character number (1-).  Call this
   before processing the token.  */
 
static void
update_lineno_charno (void)
{
   /* Update the values we send to caller in case we sometimes don't
      tell them about all the 'tokens' eg comments etc.  */
   int yyl;
   LINEMAP_POSITION_FOR_COLUMN (input_location, &line_table,
                                next_tree_charno);
   ((struct prod_token_parm_item *)yylval)->tp.tok.location = input_location;
   ((struct prod_token_parm_item *)yylval)->tp.tok.charno = next_tree_charno;
 
   for ( yyl = 0; yyl < yyleng; ++yyl )
      {
         if ( yytext[yyl] == '\n' )
            {
#ifdef USE_MAPPED_LOCATION
              source_location s = linemap_line_start (&line_table, ++lineno,
                                                      80);
              input_location = s;
#else
              input_line = ++lineno;
#endif
              next_tree_charno = 1;
            }
         else
           next_tree_charno++;
      }
}
 
/* Fill in the fields of yylval - the value of the token.  The token
   type is A.  */
void
update_yylval (int a)
{
  struct prod_token_parm_item * tok;
  tok = yylval;
 
  tok->category = token_category;
  tok->type = a;
  tok->tp.tok.length = yyleng;
  /* Have to copy yytext as it is just a ptr into the buffer at the
     moment.  */
  tok->tp.tok.chars = (unsigned char*) get_string (yytext, yyleng);
}
 
/* Trace the value LEXRET and the position and token details being
   returned by the lexical analyser.  */
 
static void
dump_lex_value (int lexret)
{
  int ix;
 
  fprintf (stderr, " %d l:%d c:%d ln:%d text=", lexret,
           LOCATION_LINE (((struct prod_token_parm_item *)
                          yylval)->tp.tok.location),
           ((struct prod_token_parm_item *) yylval)->tp.tok.charno,
           ((struct prod_token_parm_item *) yylval)->tp.tok.length);
 
  for (ix = 0; ix < yyleng; ix++)
    {
      fprintf (stderr, "%c", yytext[ix]);
    }
  fprintf (stderr, " in hex:");
  for (ix = 0; ix < yyleng; ix++)
    {
      fprintf (stderr, " %2.2x", yytext[ix]);
    }
  fprintf (stderr, "\n");
}
 

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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [treelang/] [lex.l] - Blame information for rev 307

Line No.	Rev	Author	Line
1	38	julius	`/* -- c -- = mode for emacs editor`
2
3			`TREELANG lexical analysis`
4
5			`---------------------------------------------------------------------`
6
7			`Copyright (C) 1986, 87, 89, 92-96, 1997, 1999, 2000, 2001, 2002, 2003,`
8			`2004, 2005, 2007 Free Software Foundation, Inc.`
9
10			`This program is free software; you can redistribute it and/or modify it`
11			`under the terms of the GNU General Public License as published by the`
12			`Free Software Foundation; either version 3, or (at your option) any`
13			`later version.`
14
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.`
19
20			`You should have received a copy of the GNU General Public License`
21			`along with this program; see the file COPYING3. If not see`
22			`.`
23
24			`In other words, you are welcome to use, share and improve this program.`
25			`You are forbidden to forbid anyone else to use, share and improve`
26			`what you give them. Help stamp out software-hoarding!`
27
28			`---------------------------------------------------------------------`
29
30			`Written by Tim Josling 1999-2001, based in part on other parts of`
31			`the GCC compiler. */`
32
33			`%{`
34			`#include "config.h"`
35			`#include "system.h"`
36			`#include "coretypes.h"`
37			`#include "tm.h"`
38			`#include "input.h"`
39			`#include "tree.h"`
40
41			`/* Token defs. */`
42			`#include "treelang.h"`
43			`#include "parse.h"`
44			`#include "treetree.h"`
45			`#include "toplev.h"`
46
47			`extern int option_lexer_trace;`
48
49			`int yylex (void);`
50			`void update_yylval (int a);`
51
52			`static int next_tree_charno = 1;`
53			`static int lineno = 1;`
54
55			`static void update_lineno_charno (void);`
56			`static void dump_lex_value (int lexret);`
57
58			`#define SAVE_RETURN(a) {update_yylval (a); if (option_lexer_trace)\`
59			`{fprintf (stderr, "\nlexer returning"); dump_lex_value (a);} return a;}`
60			`#define NOT_RETURN(a) {update_yylval (a); if (option_lexer_trace)\`
61			`{fprintf (stderr, "\nlexer swallowing"); dump_lex_value (a);}}`
62			`#ifndef USE_MAPPED_LOCATION`
63			`#undef LINEMAP_POSITION_FOR_COLUMN`
64			`#define LINEMAP_POSITION_FOR_COLUMN(INPUT, LINETABLE, COL)`
65			`#endif`
66			`%}`
67
68			`%option nostack`
69			`%option nounput`
70			`%option noyywrap`
71			`%option pointer`
72			`%option nodefault`
73
74			`%%`
75
76			`{`
77			`/* ??? Should really allocate only what we need. */`
78			`yylval = my_malloc (sizeof (struct prod_token_parm_item));`
79			`LINEMAP_POSITION_FOR_COLUMN (input_location, &line_table,`
80			`next_tree_charno);`
81			`((struct prod_token_parm_item *)yylval)->tp.tok.location = input_location;`
82			`((struct prod_token_parm_item *)yylval)->tp.tok.charno = next_tree_charno;`
83			`}`
84
85			`[ \n\t]+ {`
86			`update_lineno_charno ();`
87			`NOT_RETURN (WHITESPACE);`
88			`}`
89
90			`"//".* {`
91			`/* Comment. */`
92			`update_lineno_charno ();`
93			`NOT_RETURN (COMMENT);`
94			`}`
95
96			`"{" {`
97			`update_lineno_charno ();`
98			`SAVE_RETURN (LEFT_BRACE);`
99			`}`
100
101			`"}" {`
102			`update_lineno_charno ();`
103			`SAVE_RETURN (RIGHT_BRACE);`
104			`}`
105
106			`"(" {`
107			`update_lineno_charno ();`
108			`SAVE_RETURN (LEFT_PARENTHESIS);`
109			`}`
110
111			`")" {`
112			`update_lineno_charno ();`
113			`SAVE_RETURN (RIGHT_PARENTHESIS);`
114			`}`
115
116			`"," {`
117			`update_lineno_charno ();`
118			`SAVE_RETURN (COMMA);`
119			`}`
120
121			`";" {`
122			`update_lineno_charno ();`
123			`SAVE_RETURN (SEMICOLON);`
124			`}`
125
126			`"+" {`
127			`update_lineno_charno ();`
128			`SAVE_RETURN (tl_PLUS);`
129			`}`
130
131			`"-" {`
132			`update_lineno_charno ();`
133			`SAVE_RETURN (tl_MINUS);`
134			`}`
135
136			`"=" {`
137			`update_lineno_charno ();`
138			`SAVE_RETURN (ASSIGN);`
139			`}`
140
141			`"==" {`
142			`update_lineno_charno ();`
143			`SAVE_RETURN (EQUALS);`
144			`}`
145
146			`[+-]?[0-9]+ {`
147			`update_lineno_charno ();`
148			`SAVE_RETURN (INTEGER);`
149			`}`
150
151			`"external_reference" {`
152			`update_lineno_charno ();`
153			`SAVE_RETURN (EXTERNAL_REFERENCE);`
154			`}`
155
156			`"external_definition" {`
157			`update_lineno_charno ();`
158			`SAVE_RETURN (EXTERNAL_DEFINITION);`
159			`}`
160
161			`"static" {`
162			`update_lineno_charno ();`
163			`SAVE_RETURN (STATIC);`
164			`}`
165
166			`"automatic" {`
167			`update_lineno_charno ();`
168			`SAVE_RETURN (AUTOMATIC);`
169			`}`
170
171			`"int" {`
172			`update_lineno_charno ();`
173			`SAVE_RETURN (INT);`
174			`}`
175
176			`"char" {`
177			`update_lineno_charno ();`
178			`SAVE_RETURN (CHAR);`
179			`}`
180
181			`"void" {`
182			`update_lineno_charno ();`
183			`SAVE_RETURN (VOID);`
184			`}`
185
186			`"unsigned" {`
187			`update_lineno_charno ();`
188			`SAVE_RETURN (UNSIGNED);`
189			`}`
190
191			`"return" {`
192			`update_lineno_charno ();`
193			`SAVE_RETURN (tl_RETURN);`
194			`}`
195
196			`"if" {`
197			`update_lineno_charno ();`
198			`SAVE_RETURN (IF);`
199			`}`
200
201			`"else" {`
202			`update_lineno_charno ();`
203			`SAVE_RETURN (ELSE);`
204			`}`
205
206			`[A-Za-z_]+[A-Za-z_0-9]* {`
207			`update_lineno_charno ();`
208			`update_yylval (NAME);`
209			`if (option_lexer_trace)`
210			`{`
211			`fprintf (stderr, "\nlexer returning");`
212			`dump_lex_value (NAME);`
213			`}`
214			`return NAME;`
215			`}`
216
217			`[^\n] {`
218			`update_lineno_charno ();`
219			`error ("%HUnrecognized character %qc.",`
220			`&((struct prod_token_parm_item *)yylval)->tp.tok.location,`
221			`yytext[0]);`
222			`}`
223
224			`%%`
225
226			`/*`
227			`Update line number (1-) and character number (1-). Call this`
228			`before processing the token. */`
229
230			`static void`
231			`update_lineno_charno (void)`
232			`{`
233			`/* Update the values we send to caller in case we sometimes don't`
234			`tell them about all the 'tokens' eg comments etc. */`
235			`int yyl;`
236			`LINEMAP_POSITION_FOR_COLUMN (input_location, &line_table,`
237			`next_tree_charno);`
238			`((struct prod_token_parm_item *)yylval)->tp.tok.location = input_location;`
239			`((struct prod_token_parm_item *)yylval)->tp.tok.charno = next_tree_charno;`
240
241			`for ( yyl = 0; yyl < yyleng; ++yyl )`
242			`{`
243			`if ( yytext[yyl] == '\n' )`
244			`{`
245			`#ifdef USE_MAPPED_LOCATION`
246			`source_location s = linemap_line_start (&line_table, ++lineno,`
247			`80);`
248			`input_location = s;`
249			`#else`
250			`input_line = ++lineno;`
251			`#endif`
252			`next_tree_charno = 1;`
253			`}`
254			`else`
255			`next_tree_charno++;`
256			`}`
257			`}`
258
259			`/* Fill in the fields of yylval - the value of the token. The token`
260			`type is A. */`
261			`void`
262			`update_yylval (int a)`
263			`{`
264			`struct prod_token_parm_item * tok;`
265			`tok = yylval;`
266
267			`tok->category = token_category;`
268			`tok->type = a;`
269			`tok->tp.tok.length = yyleng;`
270			`/* Have to copy yytext as it is just a ptr into the buffer at the`
271			`moment. */`
272			`tok->tp.tok.chars = (unsigned char*) get_string (yytext, yyleng);`
273			`}`
274
275			`/* Trace the value LEXRET and the position and token details being`
276			`returned by the lexical analyser. */`
277
278			`static void`
279			`dump_lex_value (int lexret)`
280			`{`
281			`int ix;`
282
283			`fprintf (stderr, " %d l:%d c:%d ln:%d text=", lexret,`
284			`LOCATION_LINE (((struct prod_token_parm_item *)`
285			`yylval)->tp.tok.location),`
286			`((struct prod_token_parm_item *) yylval)->tp.tok.charno,`
287			`((struct prod_token_parm_item *) yylval)->tp.tok.length);`
288
289			`for (ix = 0; ix < yyleng; ix++)`
290			`{`
291			`fprintf (stderr, "%c", yytext[ix]);`
292			`}`
293			`fprintf (stderr, " in hex:");`
294			`for (ix = 0; ix < yyleng; ix++)`
295			`{`
296			`fprintf (stderr, " %2.2x", yytext[ix]);`
297			`}`
298			`fprintf (stderr, "\n");`
299			`}`
300