Skip to content
This repository
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 143 lines (122 sloc) 3.695 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142
/*** dexpr.l -- date/time expressions for dateutils -*- C -*-
 *
 * Copyright (C) 2002-2012 Sebastian Freundt
 *
 * Author: Sebastian Freundt <freundt@fresse.org>
 *
 * This file is part of dateutils.
 *
 * 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 author nor the names of any contributors
 * may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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.
 *
 ***/

%{
#include "dexpr.h"
#include "dexpr-parser.h"

/* grrrrr, bug in bison */
extern int yyparse();

/* turn off tedious warnings */
#if defined __INTEL_COMPILER
# pragma warning (disable:593)
# pragma warning (disable:869)
# pragma warning (disable:1419)
# pragma warning (disable:2259)
#elif defined __GNUC__
# pragma GCC diagnostic ignored "-Wswitch-default"
# pragma GCC diagnostic ignored "-Wsign-compare"
# pragma GCC diagnostic ignored "-Wunused-parameter"
#endif /* __GNUC__ || __INTEL_COMPILER */
%}

%option noyywrap
%option nounput
%option noinput
%option warn
%option bison-bridge
%option pointer
%option nodebug

%{
#define RETURN_TOKEN(_x) \
do { \
return _x; \
} while (0)
%}

string \"(\\.|[^\\\"])*\"|'(\\.|[^\\\'])*'
/* only canonical dates are allowed */
int [0-9]+

%%
"="=? { RETURN_TOKEN(TOK_EQ); }
"!=" { RETURN_TOKEN(TOK_NE); }
"<" { RETURN_TOKEN(TOK_LT); }
"<=" { RETURN_TOKEN(TOK_LE); }
">" { RETURN_TOKEN(TOK_GT); }
">=" { RETURN_TOKEN(TOK_GE); }

"||" { RETURN_TOKEN(TOK_OR); }
"&&" { RETURN_TOKEN(TOK_AND); }
"!" { RETURN_TOKEN(TOK_NOT); }

"(" { RETURN_TOKEN(TOK_LPAREN); }
")" { RETURN_TOKEN(TOK_RPAREN); }

"%"[_a-zA-Z]* {
yylval->sval = yytext;
RETURN_TOKEN(TOK_SPEC);
}

{string} {
/* strip quotes */
yytext[yyleng - 1] = '\0';
yylval->sval = yytext + 1;
RETURN_TOKEN(TOK_STRING);
}

{int} {
yylval->sval = yytext;
RETURN_TOKEN(TOK_INT);
}

[^\v\n\f()!&|<>=]* {
/* return for parsing with our strpdt reader */
yylval->sval = yytext;
RETURN_TOKEN(TOK_DATETIME);
}

[ \t\v\n\f] { /* ignore whitespace */ }
. { /* ignore */ }

%%

int
dexpr_parse(dexpr_t *root, const char *s, size_t l)
{
YY_BUFFER_STATE buf;
char *scan;
int res;

/* hack to avoid string dup'ing, we assume, that l can take
* at least 2 more bytes */

scan = malloc(l + 2);
memcpy(scan, s, l);
scan[l++] = '\0';
scan[l++] = '\0';
buf = yy_scan_buffer(scan, l);

/* parse them */
res = yyparse(root);
yy_delete_buffer(buf);
return (res == 0) - 1;
}

/* dexpr.l ends here */
Something went wrong with that request. Please try again.