exp/expression-parser.l

   1 %{
   2
   3 /*
   4  * (C) Copyright 2014, Stephen M. Cameron.
   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 version 2 as
   8  *  published by the Free Software Foundation.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  */
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include "y.tab.h"
  24
  25 #define YYSTYPE PARSER_VALUE_TYPE
  26
  27 extern int lexer_input(char* buffer, int *nbytes, int buffersize);
  28
  29 #undef YY_INPUT
  30 #define YY_INPUT(buffer, bytes_read, bytes_requested) \
  31                 lexer_input((buffer), &(bytes_read), (bytes_requested))
  32
  33 extern int yyerror(long long *result, double *dresult,
  34                 int *has_error, int *bye, const char *msg);
  35
  36 static void __attribute__((unused)) yyunput(int c,char *buf_ptr);
  37 static int __attribute__((unused)) input(void);
  38
  39 #define set_suffix_value(yylval, i_val, d_val, has_d_val) \
  40         (yylval).v.dval = (d_val); \
  41         (yylval).v.ival = (i_val); \
  42         (yylval).v.has_dval = (has_d_val); \
  43         (yylval).v.has_error = 0;
  44
  45 %}
  46
  47 %%
  48
  49
  50 bye             return BYE;
  51 [kK]|[kK][bB]   {
  52                         set_suffix_value(yylval, 1024, 1024.0, 0);
  53                         return SUFFIX;
  54                 }
  55 [Mm]|[Mm][bB]   {
  56                         set_suffix_value(yylval, 1024 * 1024, 1024.0 * 1024.0, 0);
  57                         return SUFFIX;
  58                 }
  59 [mM][sS]        {
  60                         set_suffix_value(yylval, 1000, 1000.0, 1);
  61                         return SUFFIX;
  62                 }
  63 [uU][sS]        {
  64                         set_suffix_value(yylval, 1, 1.0, 1);
  65                         return SUFFIX;
  66                 }
  67 [gG]|[Gg][Bb]   {
  68                         set_suffix_value(yylval, 1024LL * 1024 * 1024, 1024.0 * 1024.0 * 1024, 0);
  69                         return SUFFIX;
  70                 }
  71 [tT]|[tT][bB]   {
  72                         set_suffix_value(yylval, 1024LL * 1024 * 1024 * 1024,
  73                                                 1024.0 * 1024.0 * 1024.0 * 1024.0 * 1024, 0);
  74                         return SUFFIX;
  75                 }
  76 [pP]|[pP][bB]   {
  77                         set_suffix_value(yylval, 1024LL * 1024 * 1024 * 1024 * 1024,
  78                                         1024.0 * 1024.0 * 1024.0 * 1024.0 * 1024.0, 0);
  79                         return SUFFIX;
  80                 }
  81 [kK][iI][Bb]    {
  82                         set_suffix_value(yylval, 1000LL, 1000.0, 0);
  83                         return SUFFIX;
  84                 }
  85 [mM][Ii][bB]    {
  86                         set_suffix_value(yylval, 1000000LL, 1000000.0 , 0);
  87                         return SUFFIX;
  88                 }
  89 [gG][iI][Bb]    {
  90                         set_suffix_value(yylval, 1000000000LL, 1000000000.0 , 0);
  91                         return SUFFIX;
  92                 }
  93 [pP][iI][Bb]    {
  94                         set_suffix_value(yylval, 1000000000000LL, 1000000000000.0 , 0);
  95                         return SUFFIX;
  96                 }
  97 [sS]            {
  98                         set_suffix_value(yylval, 1000000LL, 1000000.0 , 0);
  99                         return SUFFIX;
 100                 }
 101 [dD]            {
 102                         set_suffix_value(yylval, 60LL * 60LL * 24LL * 1000000LL,
 103                                                 60.0 * 60.0 * 24.0 * 1000000.0, 0);
 104                         return SUFFIX;
 105                 }
 106 [hH]            {
 107                         set_suffix_value(yylval, 60LL * 60LL * 1000000LL,
 108                                         60.0 * 60.0 * 1000000.0, 0);
 109                         return SUFFIX;
 110                 }
 111 [ \t] ; /* ignore whitespace */
 112 #.+ ; /* ignore comments */
 113 [0-9]*[.][0-9]+ {
 114                         int rc;
 115                         double dval;
 116
 117                         rc = sscanf(yytext, "%lf", &dval);
 118                         if (rc == 1) {
 119                                 yylval.v.dval = dval;
 120                                 yylval.v.ival = (long long) dval;
 121                                 yylval.v.has_dval = 1;
 122                                 yylval.v.has_error = 0;
 123                                 return NUMBER;
 124                         } else {
 125                                 yyerror(0, 0, 0, 0, "bad number\n");
 126                                 yylval.v.has_error = 1;
 127                                 return NUMBER;
 128                         }
 129                 }
 130 0x[0-9a-fA-F]+ {
 131                 int rc, intval;
 132                 rc = sscanf(yytext, "%x", &intval);
 133                 if (rc == 1) {
 134                         yylval.v.ival = intval;
 135                         yylval.v.dval = (double) intval;
 136                         yylval.v.has_dval = 0;
 137                         yylval.v.has_error = 0;
 138                         return NUMBER;
 139                 } else {
 140                         yyerror(0, 0, 0, 0, "bad number\n");
 141                         yylval.v.has_error = 1;
 142                         return NUMBER;
 143                 }
 144         }
 145 [0-9]+  {
 146                 int rc, intval;
 147                 rc = sscanf(yytext, "%d", &intval);
 148                 if (rc == 1) {
 149                         yylval.v.ival = intval;
 150                         yylval.v.dval = (double) intval;
 151                         yylval.v.has_dval = 0;
 152                         yylval.v.has_error = 0;
 153                         return NUMBER;
 154                 } else {
 155                         yyerror(0, 0, 0, 0, "bad number\n");
 156                         yylval.v.has_error = 1;
 157                         return NUMBER;
 158                 }
 159         }
 160 \n      return 0;
 161 [+-/*()]        return yytext[0];
 162 .       {
 163                 yylval.v.has_error = 1;
 164                 return NUMBER;
 165         }
 166 %%
 167