newsearch/newsearch.l

   1 %option noyywrap
   2
   3 %{
   4 #include "../lib/sstring.h"
   5
   6 #define YYSTYPE sstring *
   7 extern YYSTYPE yylval;
   8
   9 #include "y.tab.h"
  10
  11 #include <stdlib.h>
  12 #include "../lib/stringbuf.h"
  13
  14 #define MAX_STR_CONST 512
  15
  16 /* shuts gcc up */
  17 static void yyunput (int c,char *buf_ptr);
  18 void newsearch_parser_dummy(void) {
  19   yyunput(0, NULL);
  20 }
  21
  22 int fileno(void *arg) {
  23   return 0;
  24 }
  25
  26 %}
  27
  28 digit           [0-9]
  29 letter          [a-zA-Z]
  30
  31 %x str
  32 %%
  33
  34         char bufdata[MAX_STR_CONST];
  35         StringBuf buf;
  36
  37 \"              {
  38                   sbinit(&buf, bufdata, sizeof(bufdata));
  39                   BEGIN(str);
  40                 }
  41
  42 <str>{
  43   \"            {
  44                   BEGIN(INITIAL);
  45                   sbterminate(&buf);
  46                   yylval = getsstring(bufdata, 512);
  47                   return STRING;
  48                 }
  49   \\\\          { sbaddchar(&buf, '\\');        }
  50   \\\"          { sbaddchar(&buf, '"');         }
  51   [^\\]         { sbaddchar(&buf, *yytext);     }
  52 }
  53
  54 "("             { return LPAREN;                }
  55 ")"             { return RPAREN;                }
  56 [ \t]+          { return WHITESPACE;            }
  57 {letter}+       {
  58                   yylval = getsstring(yytext, 512);
  59                   return IDENTIFIER;
  60                 }
  61
  62 [\n\r]          /* ignore */;
  63
  64 <<EOF>>         {
  65                   BEGIN(INITIAL);
  66                   yyterminate();
  67                 }
  68 %%