lex_var.h revision 255332
1/* $FreeBSD: head/contrib/ipfilter/tools/lex_var.h 255332 2013-09-06 23:11:19Z cy $ */ 2 3/* 4 * Copyright (C) 2012 by Darren Reed. 5 * 6 * See the IPFILTER.LICENCE file for details on licencing. 7 */ 8 9extern long string_start; 10extern long string_end; 11extern char *string_val; 12extern long pos; 13 14#define YY_INPUT(buf, result, max_size) \ 15 if (pos >= string_start && pos <= string_end) { \ 16 buf[0] = string_val[pos - string_start]; \ 17 pos++; \ 18 result = 1; \ 19 } else if ( yy_current_buffer->yy_is_interactive ) \ 20 { \ 21 int c = '*', n; \ 22 for ( n = 0; n < 1 && \ 23 (c = getc( yyin )) != EOF && c != '\n'; ++n ) \ 24 buf[n] = (char) c; \ 25 if ( c == '\n' ) \ 26 buf[n++] = (char) c; \ 27 if ( c == EOF && ferror( yyin ) ) \ 28 YY_FATAL_ERROR( "input in flex scanner failed" ); \ 29 result = n; \ 30 pos++; \ 31 } \ 32 else if ( ((result = fread( buf, 1, 1, yyin )) == 0) \ 33 && ferror( yyin ) ) \ 34 YY_FATAL_ERROR( "input in flex scanner failed" ); 35 36#ifdef input 37# undef input 38# define input() (((pos >= string_start) && (pos < string_end)) ? \ 39 yysptr = yysbuf, string_val[pos++ - string_start] : \ 40 ((yytchar = yysptr > yysbuf ? U(*--yysptr) : \ 41 getc(yyin)) == 10 ? (pos++, yylineno++, yytchar) : \ 42 yytchar) == EOF ? (pos++, 0) : (pos++, yytchar)) 43#endif 44 45#ifdef lex_input 46# undef lex_input 47# define lex_input() (((pos >= string_start) && (pos < string_end)) ? \ 48 yysptr = yysbuf, string_val[pos++ - string_start] : \ 49 ((yytchar = yysptr > yysbuf ? U(*--yysptr) : \ 50 getc(yyin)) == 10 ? (pos++, yylineno++, yytchar) : \ 51 yytchar) == EOF ? (pos++, 0) : (pos++, yytchar)) 52#endif 53 54#ifdef unput 55# undef unput 56# define unput(c) { if (pos > 0) pos--; \ 57 yytchar = (c); if (yytchar == '\n') yylineno--; \ 58 *yysptr++ = yytchar; } 59#endif 60 61