| 1 | /* yylex - scanner front-end for flex */
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| 2 |
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| 3 | /* Copyright (c) 1990 The Regents of the University of California. */
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| 4 | /* All rights reserved. */
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| 5 |
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| 6 | /* This code is derived from software contributed to Berkeley by */
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| 7 | /* Vern Paxson. */
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| 8 |
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| 9 | /* The United States Government has rights in this work pursuant */
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| 10 | /* to contract no. DE-AC03-76SF00098 between the United States */
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| 11 | /* Department of Energy and the University of California. */
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| 12 |
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| 13 | /* This file is part of flex. */
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| 14 |
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| 15 | /* Redistribution and use in source and binary forms, with or without */
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| 16 | /* modification, are permitted provided that the following conditions */
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| 17 | /* are met: */
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| 18 |
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| 19 | /* 1. Redistributions of source code must retain the above copyright */
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| 20 | /* notice, this list of conditions and the following disclaimer. */
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| 21 | /* 2. Redistributions in binary form must reproduce the above copyright */
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| 22 | /* notice, this list of conditions and the following disclaimer in the */
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| 23 | /* documentation and/or other materials provided with the distribution. */
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| 24 |
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| 25 | /* Neither the name of the University nor the names of its contributors */
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| 26 | /* may be used to endorse or promote products derived from this software */
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| 27 | /* without specific prior written permission. */
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| 28 |
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| 29 | /* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
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| 30 | /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
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| 31 | /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
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| 32 | /* PURPOSE. */
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| 33 |
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| 34 | #include <ctype.h>
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| 35 | #include "flexdef.h"
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| 36 | #include "parse.h"
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| 37 |
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| 38 |
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| 39 | /* yylex - scan for a regular expression token */
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| 40 |
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| 41 | int yylex ()
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| 42 | {
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| 43 | int toktype;
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| 44 | static int beglin = false;
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| 45 | extern char *yytext;
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| 46 |
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| 47 | if (eofseen)
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| 48 | toktype = EOF;
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| 49 | else
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| 50 | toktype = flexscan ();
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| 51 |
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| 52 | if (toktype == EOF || toktype == 0) {
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| 53 | eofseen = 1;
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| 54 |
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