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%{
/*
** A scanner for EMP-style numeric ranges
*/
#include "postgres.h"
#include "buffer.h"
/* flex screws a couple symbols when used with the -P option; fix those */
#define YY_DECL int cube_yylex YY_PROTO(( void )); \
int cube_yylex YY_PROTO(( void ))
#define yylval cube_yylval
/* redefined YY_INPUT reads byte-wise from the memory area defined in buffer.c */
#undef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
{ \
int c = read_parse_buffer(); \
result = (c == '\0') ? YY_NULL : (buf[0] = c, 1); \
}
void cube_flush_scanner_buffer(void);
%}
%option 8bit
%option never-interactive
%option nounput
%option noyywrap
n [0-9]+
integer [+-]?{n}
real [+-]?({n}\.{n}?|\.{n})
float ({integer}|{real})([eE]{integer})?
%%
{float} yylval = yytext; return FLOAT;
\[ yylval = "("; return O_BRACKET;
\] yylval = ")"; return C_BRACKET;
\( yylval = "("; return O_PAREN;
\) yylval = ")"; return C_PAREN;
\, yylval = ")"; return COMMA;
[ ]+ /* discard spaces */
. return yytext[0]; /* alert parser of the garbage */
%%
int cube_yylex();
void cube_flush_scanner_buffer(void) {
fprintf(stderr, "cube_flush_scanner_buffer called\n");
YY_FLUSH_BUFFER;
}
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