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, unsigned int *nbytes, int buffersize);
  28
  29 #undef YY_INPUT
  30 #define YY_INPUT(buffer, bytes_read, bytes_requested)                   \
  31 ({                                                                      \
  32         int __ret;                                                      \
  33         unsigned int __bread = bytes_read;                              \
  34         __ret = lexer_input((buffer), &__bread, (bytes_requested));     \
  35         bytes_read = __bread;                                           \
  36         __ret;                                                          \
  37 })
  38
  39 extern int yyerror(long long *result, double *dresult,
  40                 int *has_error, int *units_specified, const char *msg);
  41
  42 static void __attribute__((unused)) yyunput(int c, char *buf_ptr);
  43 static int __attribute__((unused)) input(void);
  44
  45 #define set_suffix_value(yylval, i_val, d_val, has_d_val) \
  46         (yylval).v.dval = (d_val); \
  47         (yylval).v.ival = (i_val); \
  48         (yylval).v.has_dval = (has_d_val); \
  49         (yylval).v.has_error = 0;
  50
  51 %}
  52
  53 %%
  54
  55
  56 [kK]|[kK][bB]   {
  57                         set_suffix_value(yylval, 1024, 1024.0, 0);
  58                         return SUFFIX;
  59                 }
  60 [Mm]|[Mm][bB]   {
  61                         set_suffix_value(yylval, 1024 * 1024, 1024.0 * 1024.0, 0);
  62                         return SUFFIX;
  63                 }
  64 [mM][sS]        {
  65                         set_suffix_value(yylval, 1000, 1000.0, 1);
  66                         return SUFFIX;
  67                 }
  68 [uU][sS]        {
  69                         set_suffix_value(yylval, 1, 1.0, 1);
  70                         return SUFFIX;
  71                 }
  72 [gG]|[Gg][Bb]   {
  73                         set_suffix_value(yylval, 1024LL * 1024 * 1024, 1024.0 * 1024.0 * 1024, 0);
  74                         return SUFFIX;
  75                 }
  76 [tT]|[tT][bB]   {
  77                         set_suffix_value(yylval, 1024LL * 1024 * 1024 * 1024,
  78                                                 1024.0 * 1024.0 * 1024.0 * 1024.0 * 1024, 0);
  79                         return SUFFIX;
  80                 }
  81 [pP]|[pP][bB]   {
  82                         set_suffix_value(yylval, 1024LL * 1024 * 1024 * 1024 * 1024,
  83                                         1024.0 * 1024.0 * 1024.0 * 1024.0 * 1024.0, 0);
  84                         return SUFFIX;
  85                 }
  86 [kK][iI][Bb]    {
  87                         set_suffix_value(yylval, 1000LL, 1000.0, 0);
  88                         return SUFFIX;
  89                 }
  90 [mM][Ii][bB]    {
  91                         set_suffix_value(yylval, 1000000LL, 1000000.0 , 0);
  92                         return SUFFIX;
  93                 }
  94 [gG][iI][Bb]    {
  95                         set_suffix_value(yylval, 1000000000LL, 1000000000.0 , 0);
  96                         return SUFFIX;
  97                 }
  98 [pP][iI][Bb]    {
  99                         set_suffix_value(yylval, 1000000000000LL, 1000000000000.0 , 0);
 100                         return SUFFIX;
 101                 }
 102 [sS]            {
 103                         set_suffix_value(yylval, 1000000LL, 1000000.0 , 0);
 104                         return SUFFIX;
 105                 }
 106 [dD]            {
 107                         set_suffix_value(yylval, 60LL * 60LL * 24LL * 1000000LL,
 108                                                 60.0 * 60.0 * 24.0 * 1000000.0, 0);
 109                         return SUFFIX;
 110                 }
 111 [hH]            {
 112                         set_suffix_value(yylval, 60LL * 60LL * 1000000LL,
 113                                         60.0 * 60.0 * 1000000.0, 0);
 114                         return SUFFIX;
 115                 }
 116 [ \t] ; /* ignore whitespace */
 117 [#:,].* ; /* ignore comments, and everything after colons and commas */
 118 [0-9]*[.][0-9]+|[0-9]*[.]?[0-9]+[eE][-+]*[0-9]+ {
 119                         int rc;
 120                         double dval;
 121
 122                         rc = sscanf(yytext, "%lf", &dval);
 123                         if (rc == 1) {
 124                                 yylval.v.dval = dval;
 125                                 yylval.v.ival = (long long) dval;
 126                                 yylval.v.has_dval = 1;
 127                                 yylval.v.has_error = 0;
 128                                 return NUMBER;
 129                         } else {
 130                                 yyerror(0, 0, 0, 0, "bad number\n");
 131                                 yylval.v.has_error = 1;
 132                                 return NUMBER;
 133                         }
 134                 }
 135 0x[0-9a-fA-F]+ {
 136                 int rc, intval;
 137                 rc = sscanf(yytext, "%x", &intval);
 138                 if (rc == 1) {
 139                         yylval.v.ival = intval;
 140                         yylval.v.dval = (double) intval;
 141                         yylval.v.has_dval = 0;
 142                         yylval.v.has_error = 0;
 143                         return NUMBER;
 144                 } else {
 145                         yyerror(0, 0, 0, 0, "bad number\n");
 146                         yylval.v.has_error = 1;
 147                         return NUMBER;
 148                 }
 149         }
 150 [0-9]+  {
 151                 int rc, intval;
 152                 rc = sscanf(yytext, "%d", &intval);
 153                 if (rc == 1) {
 154                         yylval.v.ival = intval;
 155                         yylval.v.dval = (double) intval;
 156                         yylval.v.has_dval = 0;
 157                         yylval.v.has_error = 0;
 158                         return NUMBER;
 159                 } else {
 160                         yyerror(0, 0, 0, 0, "bad number\n");
 161                         yylval.v.has_error = 1;
 162                         return NUMBER;
 163                 }
 164         }
 165 \n      return 0;
 166 [+-/*()^%]      return yytext[0];
 167
 168 .       {
 169                 yylval.v.has_error = 1;
 170                 return NUMBER;
 171         }
 172 %%
 173