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 <*>MOTHERFUCKER         { fprintf(stderr,"You are a bad bad person!\n"); REJECT; }
  71
  72 \/\/.*$                 { ; /*comment, ignore*/ }
  73 <C_CODE>\/\/.*$         { add_to_cbuf(yytext); /*comment, ignore*/ }
  74 <CLASS_CODE>\/\/.*$     { ; /*comment, ignore*/ }
  75 <CLASS_CODE_I>\/\/.*$   { ; /*comment, ignore*/ }
  76 \/\*            {BEGIN(COMMENT); before_comment = INITIAL; }
  77 <C_CODE>\/\*    {
  78         add_to_cbuf(yytext);
  79         BEGIN(COMMENT);
  80         before_comment = C_CODE;
  81 }
  82 <CLASS_CODE>\/\*        {BEGIN(COMMENT); before_comment = CLASS_CODE; }
  83 <CLASS_CODE_I>\/\*      {BEGIN(COMMENT); before_comment = CLASS_CODE_I; }
  84 <COMMENT>\*\/   {
  85         if(before_comment == C_CODE) add_to_cbuf(yytext);
  86         BEGIN(before_comment);
  87                 }
  88 <COMMENT>.      {
  89         /* comment, ignore */
  90         if(before_comment == C_CODE) add_to_cbuf(yytext);
  91                 }
  92 <COMMENT>\n     {
  93         /* comment, ignore */
  94         if(before_comment == C_CODE) add_to_cbuf(yytext);
  95                 }
  96
  97 ^\%h\{          {
  98                         BEGIN(C_CODE);
  99                         parenth_depth = 1;
 100                         class_after_c = FALSE;
 101                         header_c = TRUE;
 102                         clear_cbuf();
 103                         ccode_line = line_no;
 104                 }
 105 ^\%\{           {
 106                         BEGIN(C_CODE);
 107                         parenth_depth = 1;
 108                         class_after_c = FALSE;
 109                         header_c = FALSE;
 110                         clear_cbuf();
 111                         ccode_line = line_no;
 112                 }
 113 <C_CODE>^\%\}   {
 114                         BEGIN(INITIAL);
 115                         yylval.cbuf = cbuf;
 116                         cbuf = NULL;
 117                         if(header_c)
 118                                 return HCODE;
 119                         else
 120                                 return CCODE;
 121                 }
 122
 123 <C_CODE>\'\{\'          { add_to_cbuf(yytext); }
 124 <C_CODE>\'\\\{\'        { add_to_cbuf(yytext); }
 125 <C_CODE>\'\}\'          { add_to_cbuf(yytext); }
 126 <C_CODE>\'\\\}\'        { add_to_cbuf(yytext); }
 127 <C_CODE>\'\"\'          { add_to_cbuf(yytext); }
 128 <C_CODE>\'\\\"\'        { add_to_cbuf(yytext); }
 129
 130 <C_CODE>\\.     { add_to_cbuf(yytext); }
 131 <C_CODE>\"      {
 132                         BEGIN(C_CODE_STRING);
 133                         add_to_cbuf(yytext);
 134                 }
 135 <C_CODE_STRING>\\.      { add_to_cbuf(yytext); }
 136 <C_CODE_STRING>\"       {
 137                                 BEGIN(C_CODE);
 138                                 add_to_cbuf(yytext);
 139                         }
 140 <C_CODE_STRING>.        { add_to_cbuf(yytext); }
 141 <C_CODE_STRING>\n       { add_to_cbuf(yytext); }
 142
 143 <C_CODE>\{      {
 144                         parenth_depth++;
 145                         add_to_cbuf(yytext);
 146                 }
 147 <C_CODE>\}      {
 148                         parenth_depth--;
 149                         if(parenth_depth<0) {
 150                                 REJECT;
 151                         } else if(parenth_depth==0 && class_after_c) {
 152                                 BEGIN(CLASS_CODE_I);
 153                                 yylval.cbuf = cbuf;
 154                                 cbuf = NULL;
 155                                 return CCODE;
 156                         }
 157                         add_to_cbuf(yytext);
 158                 }
 159
 160 <C_CODE>.       { add_to_cbuf(yytext); }
 161 <C_CODE>\n      { add_to_cbuf(yytext); }
 162
 163 class           {
 164                         BEGIN(CLASS_CODE);
 165                         return CLASS;
 166                 }
 167
 168 <CLASS_CODE>from        {return FROM;}
 169
 170 <CLASS_CODE_I>void      {return VOID;}
 171 <CLASS_CODE_I>struct    {return STRUCT;}
 172 <CLASS_CODE_I>union     {return UNION;}
 173 <CLASS_CODE_I>enum      {return ENUM;}
 174 <CLASS_CODE_I>signed    {return SIGNED;}
 175 <CLASS_CODE_I>unsigned  {return UNSIGNED;}
 176 <CLASS_CODE_I>long      {return LONG;}
 177 <CLASS_CODE_I>short     {return SHORT;}
 178 <CLASS_CODE_I>int       {return INT;}
 179 <CLASS_CODE_I>float     {return FLOAT;}
 180 <CLASS_CODE_I>double    {return DOUBLE;}
 181 <CLASS_CODE_I>char      {return CHAR;}
 182 <CLASS_CODE_I>const     {return CONST;}
 183
 184 <CLASS_CODE_I>\.\.\.    {return THREEDOTS;}
 185
 186 <CLASS_CODE_I>public    {yylval.line = line_no; return PUBLIC;}
 187 <CLASS_CODE_I>private   {yylval.line = line_no; return PRIVATE;}
 188 <CLASS_CODE_I>argument  {yylval.line = line_no; return ARGUMENT;}
 189 <CLASS_CODE_I>virtual   {yylval.line = line_no; return VIRTUAL;}
 190 <CLASS_CODE_I>signal    {yylval.line = line_no; return SIGNAL;}
 191 <CLASS_CODE_I>override  {yylval.line = line_no; return OVERRIDE;}
 192 <CLASS_CODE_I>onerror   {return ONERROR;}
 193 <CLASS_CODE_I>0|[1-9][0-9]*|0x[0-9a-fA-F]+|0[0-7]+|[0-9]*\.[0-9]+|\.[0-9][0-9]* {
 194                         yylval.id = g_strdup(yytext);
 195                         return NUMBER;
 196                 }
 197 <CLASS_CODE,CLASS_CODE_I>:?[A-Za-z_][A-Za-z0-9_]*(:[A-Za-z0-9_]*)+      {
 198                         yylval.id = g_strdup(yytext);
 199                         return TYPETOKEN;
 200                 }
 201 <CLASS_CODE,CLASS_CODE_I>[A-Za-z_][A-Za-z0-9_]* {
 202                         yylval.id = g_strdup(yytext);
 203                         return TOKEN;
 204                 }
 205
 206 <CLASS_CODE>\{  {
 207                         BEGIN(CLASS_CODE_I);
 208                         return '{';
 209                 }
 210 <CLASS_CODE_I>\{        {
 211                         BEGIN(C_CODE);
 212                         parenth_depth=1;
 213                         class_after_c = TRUE;
 214                         ccode_line = line_no;
 215                         yylval.line = line_no;
 216                         return '{';
 217                 }
 218 <CLASS_CODE_I>\}        {
 219                                 BEGIN(INITIAL);
 220                                 return '}';
 221                         }
 222
 223 <CLASS_CODE,CLASS_CODE_I,INITIAL>[\t ]  ;  /*ignore*/
 224
 225 <*>.            {
 226                         yylval.line = line_no;
 227                         return yytext[0];
 228                 }
 229
 230 <*>[\n\r]       ;  /*ignore*/