src/lexer.l

   1 /* GOB C Preprocessor
   2  * Copyright (C) 1999 the Free Software Foundation.
   3  *
   4  * Author: George Lebl
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the  Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19  * USA.
  20  */
  21 %{
  22
  23 #include "config.h"
  24 #include <glib.h>
  25
  26 #include "parse.h"
  27
  28 static int parenth_depth = 0;
  29 static int before_comment = INITIAL;
  30 static int class_after_c = FALSE;
  31 static int header_c = FALSE;
  32
  33 static GString *cbuf = NULL;
  34 int ccode_line = 1;
  35
  36 int line_no = 1;
  37
  38 static void
  39 clear_cbuf(void)
  40 {
  41         if(!cbuf) {
  42                 cbuf = g_string_new("");
  43         } else {
  44                 cbuf = g_string_assign(cbuf,"");
  45         }
  46 }
  47
  48 static void
  49 add_to_cbuf(char *s)
  50 {
  51         if(!cbuf) {
  52                 cbuf = g_string_new(s);
  53         } else {
  54                 cbuf = g_string_append(cbuf,s);
  55         }
  56 }
  57
  58 %}
  59
  60 %x COMMENT
  61 %x C_CODE
  62 %x C_CODE_STRING
  63 %x CLASS_CODE
  64 %x CLASS_CODE_I
  65
  66 %%
  67
  68 <*>\n                   { line_no++; REJECT; }
  69
  70 \/\/.*$                 { ; /*comment, ignore*/ }
  71 <C_CODE>\/\/.*$         { ; /*comment, ignore*/ }
  72 <CLASS_CODE>\/\/.*$     { ; /*comment, ignore*/ }
  73 <CLASS_CODE_I>\/\/.*$   { ; /*comment, ignore*/ }
  74 \/\*            {BEGIN(COMMENT); before_comment = INITIAL; }
  75 <C_CODE>\/\*    {BEGIN(COMMENT); before_comment = C_CODE; }
  76 <CLASS_CODE>\/\*        {BEGIN(COMMENT); before_comment = CLASS_CODE; }
  77 <CLASS_CODE_I>\/\*      {BEGIN(COMMENT); before_comment = CLASS_CODE_I; }
  78 <COMMENT>\*\/   {BEGIN(before_comment);}
  79 <COMMENT>.      { ; /* comment, ignore */ }
  80 <COMMENT>\n     { ; /* comment, ignore */ }
  81
  82 ^\%h\{          {
  83                         BEGIN(C_CODE);
  84                         parenth_depth = 1;
  85                         class_after_c = FALSE;
  86                         header_c = TRUE;
  87                         clear_cbuf();
  88                         ccode_line = line_no;
  89                 }
  90 ^\%\{           {
  91                         BEGIN(C_CODE);
  92                         parenth_depth = 1;
  93                         class_after_c = FALSE;
  94                         header_c = FALSE;
  95                         clear_cbuf();
  96                         ccode_line = line_no;
  97                 }
  98 <C_CODE>^\%\}   {
  99                         BEGIN(INITIAL);
 100                         yylval.cbuf = cbuf;
 101                         cbuf = NULL;
 102                         if(header_c)
 103                                 return HCODE;
 104                         else
 105                                 return CCODE;
 106                 }
 107
 108 <C_CODE>\'\{\'          { add_to_cbuf(yytext); }
 109 <C_CODE>\'\\\{\'        { add_to_cbuf(yytext); }
 110 <C_CODE>\'\}\'          { add_to_cbuf(yytext); }
 111 <C_CODE>\'\\\}\'        { add_to_cbuf(yytext); }
 112
 113 <C_CODE>\\.     { add_to_cbuf(yytext); }
 114 <C_CODE>\"      {
 115                         BEGIN(C_CODE_STRING);
 116                         add_to_cbuf(yytext);
 117                 }
 118 <C_CODE_STRING>\\.      {
 119                                 add_to_cbuf(yytext);
 120                         }
 121 <C_CODE_STRING>\"       {
 122                                 BEGIN(C_CODE);
 123                                 add_to_cbuf(yytext);
 124                         }
 125 <C_CODE_STRING>.        {
 126                                 add_to_cbuf(yytext);
 127                         }
 128
 129 <C_CODE>\{      {
 130                         parenth_depth++;
 131                         add_to_cbuf(yytext);
 132                 }
 133 <C_CODE>\}      {
 134                         parenth_depth--;
 135                         if(parenth_depth<0) {
 136                                 REJECT;
 137                         } else if(parenth_depth==0 && class_after_c) {
 138                                 BEGIN(CLASS_CODE_I);
 139                                 yylval.cbuf = cbuf;
 140                                 cbuf = NULL;
 141                                 return CCODE;
 142                         }
 143                         add_to_cbuf(yytext);
 144                 }
 145
 146 <C_CODE>.       { add_to_cbuf(yytext); }
 147 <C_CODE>\n      { add_to_cbuf(yytext); }
 148
 149 class           {
 150                         BEGIN(CLASS_CODE);
 151                         return CLASS;
 152                 }
 153
 154 <CLASS_CODE>from        {return FROM;}
 155
 156 <CLASS_CODE_I>void      {return VOID;}
 157 <CLASS_CODE_I>struct    {return STRUCT;}
 158 <CLASS_CODE_I>union     {return UNION;}
 159 <CLASS_CODE_I>enum      {return ENUM;}
 160 <CLASS_CODE_I>signed    {return SIGNED;}
 161 <CLASS_CODE_I>unsigned  {return UNSIGNED;}
 162 <CLASS_CODE_I>long      {return LONG;}
 163 <CLASS_CODE_I>short     {return SHORT;}
 164 <CLASS_CODE_I>int       {return INT;}
 165 <CLASS_CODE_I>float     {return FLOAT;}
 166 <CLASS_CODE_I>double    {return DOUBLE;}
 167 <CLASS_CODE_I>char      {return CHAR;}
 168
 169 <CLASS_CODE_I>public    {yylval.line = line_no; return PUBLIC;}
 170 <CLASS_CODE_I>private   {yylval.line = line_no; return PRIVATE;}
 171 <CLASS_CODE_I>argument  {yylval.line = line_no; return ARGUMENT;}
 172 <CLASS_CODE_I>virtual   {yylval.line = line_no; return VIRTUAL;}
 173 <CLASS_CODE_I>signal    {yylval.line = line_no; return SIGNAL;}
 174 <CLASS_CODE_I>override  {yylval.line = line_no; return OVERRIDE;}
 175 <CLASS_CODE_I>onerror   {return ONERROR;}
 176 <CLASS_CODE_I>0|[1-9][0-9]*|0x[0-9a-fA-F]+|0[0-7]+|[0-9]*\.[0-9]+|\.[0-9][0-9]* {
 177                         yylval.id = g_strdup(yytext);
 178                         return NUMBER;
 179                 }
 180 <CLASS_CODE,CLASS_CODE_I>:?[A-Za-z_][A-Za-z0-9_]*(:[A-Za-z0-9_]*)+      {
 181                         yylval.id = g_strdup(yytext);
 182                         return TYPETOKEN;
 183                 }
 184 <CLASS_CODE,CLASS_CODE_I>[A-Za-z_][A-Za-z0-9_]* {
 185                         yylval.id = g_strdup(yytext);
 186                         return TOKEN;
 187                 }
 188
 189 <CLASS_CODE>\{  {
 190                         BEGIN(CLASS_CODE_I);
 191                         return '{';
 192                 }
 193 <CLASS_CODE_I>\{        {
 194                         BEGIN(C_CODE);
 195                         parenth_depth=1;
 196                         class_after_c = TRUE;
 197                         ccode_line = line_no;
 198                         yylval.line = line_no;
 199                         return '{';
 200                 }
 201 <CLASS_CODE_I>\}        {
 202                                 BEGIN(INITIAL);
 203                                 return '}';
 204                         }
 205
 206 <CLASS_CODE,CLASS_CODE_I,INITIAL>[\n\t ]        ;  /*ignore*/
 207
 208 <*>.            {
 209                         yylval.line = line_no;
 210                         return yytext[0];
 211                 }