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Diffstat (limited to 'src/kash/arith_lex.l')
| -rw-r--r-- | src/kash/arith_lex.l | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/kash/arith_lex.l b/src/kash/arith_lex.l new file mode 100644 index 0000000..b61e15b --- /dev/null +++ b/src/kash/arith_lex.l @@ -0,0 +1,172 @@ +%option never-interactive +%option noyywrap +%option noinput +%option nounput +%option noyyget_out +%option noyy_push_state +%option noyy_pop_state +%option noyy_top_state +%option noyy_scan_buffer +%option noyy_scan_bytes +%option noyy_scan_string +%option noyyget_extra +%option noyyset_extra +%option noyyget_leng +%option noyyget_text +%option noyyget_lineno +%option noyyset_lineno +%option noyyget_in +%option noyyset_in +%option noyyget_out +%option noyyset_out +%option noyyget_lval +%option noyyset_lval +%option noyyget_lloc +%option noyyset_lloc +%option noyyget_debug +%option noyyset_debug +%option noyyalloc +%option noyyrealloc +%option noyyfree +/** @todo %option reentrant */ +%{ +/* $NetBSD: arith_lex.l,v 1.13 2005/03/21 22:37:09 dsl Exp $ */ + +/*- + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Kenneth Almquist. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if 0 +#ifndef lint +static char sccsid[] = "@(#)arith_lex.l 8.3 (Berkeley) 5/4/95"; +#else +__RCSID("$NetBSD: arith_lex.l,v 1.13 2005/03/21 22:37:09 dsl Exp $"); +#endif /* not lint */ +#endif + +#include <stdio.h> +#include "arith.h" +#include "error.h" +#include "expand.h" +#include "var.h" +#include "shinstance.h" + +extern int yylval; +extern shinstance *arith_psh; +extern char *arith_buf, *arith_startbuf; +#undef YY_INPUT +#define YY_INPUT(buf,result,max) \ + result = (*buf = *arith_buf++) ? 1 : YY_NULL; +#define YY_NO_UNPUT + +/* Avoid unnecessary libc bits. */ +#undef ECHO +#define ECHO \ + do {} while (0) +#undef stdin +#define stdin \ + NULL +#undef stdout +#define stdout \ + NULL +#undef fprintf +#define fprintf(a, b, c) \ + ((void)0) +#undef exit +#define exit(rc) \ + do {} while (0) +#define YY_FATAL_ERROR(msg) \ + error(arith_psh, "arith: fatal error: %s", msg) +%} + +%% +[ \t\n] { ; } +0x[0-9a-fA-F]+ { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); } +0[0-7]* { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); } +[1-9][0-9]* { yylval = strtol(yytext, 0, 0); return(ARITH_NUM); } +[A-Za-z_][A-Za-z_0-9]* { char *v = lookupvar(arith_psh, yytext); + if (v) { + yylval = strtol(v, &v, 0); + if (*v == 0) + return ARITH_NUM; + } + error(arith_psh, "arith: syntax error: \"%s\"", arith_startbuf); + } +"(" { return(ARITH_LPAREN); } +")" { return(ARITH_RPAREN); } +"||" { return(ARITH_OR); } +"&&" { return(ARITH_AND); } +"|" { return(ARITH_BOR); } +"^" { return(ARITH_BXOR); } +"&" { return(ARITH_BAND); } +"==" { return(ARITH_EQ); } +"!=" { return(ARITH_NE); } +">" { return(ARITH_GT); } +">=" { return(ARITH_GE); } +"<" { return(ARITH_LT); } +"<=" { return(ARITH_LE); } +"<<" { return(ARITH_LSHIFT); } +">>" { return(ARITH_RSHIFT); } +"*" { return(ARITH_MUL); } +"/" { return(ARITH_DIV); } +"%" { return(ARITH_REM); } +"+" { return(ARITH_ADD); } +"-" { return(ARITH_SUB); } +"~" { return(ARITH_BNOT); } +"!" { return(ARITH_NOT); } +. { error(arith_psh, "arith: syntax error: \"%s\"", arith_startbuf); } +%% + +void +arith_lex_reset() { +#ifdef YY_NEW_FILE + YY_NEW_FILE; +#endif +} + +void * +yyalloc(yy_size_t cb) +{ + return sh_malloc(NULL, cb); +} + +void * +yyrealloc(void *pv, yy_size_t cb) +{ + return sh_realloc(NULL, pv, cb); +} + +void +yyfree(void *pv) +{ + sh_free(NULL, pv); +} + |