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sdf_lexor.lex
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sdf_lexor.lex
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%option prefix="sdf"
%option never-interactive
%option nounput
%option noinput
%{
/*
* Copyright (c) 2007-2010 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "sdf_priv.h"
# include "sdf_parse_priv.h"
# include "sdf_parse.h"
# include <stdlib.h>
# include <string.h>
# include <strings.h>
# include <assert.h>
static void process_quoted_string(void);
static int lookup_keyword(const char*text);
const char*sdf_parse_path = 0;
static int yywrap(void)
{
return 1;
}
# define yylval sdflval
%}
%x CCOMMENT
%x COND_EDGE_ID
%x EDGE_ID
%%
/* Skip C++-style comments. */
"//".* { ; }
/* Skip C-style comments. */
"/*" { BEGIN(CCOMMENT); }
<CCOMMENT>. { ; }
<CCOMMENT>\n { sdflloc.first_line += 1; }
<CCOMMENT>"*/" { BEGIN(0); }
[ \m\t] { /* Skip white space. */; }
/* Count lines so that the parser can assign line numbers. */
\n { sdflloc.first_line += 1; }
/* The other edge identifiers. */
<COND_EDGE_ID,EDGE_ID>"01" {return K_01; }
<COND_EDGE_ID,EDGE_ID>"10" {return K_10; }
<COND_EDGE_ID,EDGE_ID>"0"[zZ] {return K_0Z; }
<COND_EDGE_ID,EDGE_ID>[zZ]"1" {return K_Z1; }
<COND_EDGE_ID,EDGE_ID>"1"[zZ] {return K_1Z; }
<COND_EDGE_ID,EDGE_ID>[zZ]"0" {return K_Z0; }
<COND_EDGE_ID,EDGE_ID>[pP][oO][sS][eE][dD][gG][eE] {return K_POSEDGE; }
<COND_EDGE_ID,EDGE_ID>[nN][eE][gG][eE][dD][gG][eE] {return K_NEGEDGE; }
<COND_EDGE_ID>[cC][oO][nN][dD] {return K_COND; }
/* Integer values */
[0-9]+ {
yylval.int_val = strtoul(yytext, 0, 10);
return INTEGER;
}
/* Real values */
[0-9]+(\.[0-9]+)?([Ee][+-]?[0-9]+)? {
yylval.real_val = strtod(yytext, 0);
return REAL_NUMBER;
}
([a-zA-Z_]|(\\[^ \t\b\f\r\n]))([a-zA-Z0-9$_]|(\\[^ \t\b\f\r\n]))* {
return lookup_keyword(yytext);
}
\"[^\"]*\" {
process_quoted_string();
return QSTRING;
}
/* Scalar constants. */
("1"?"'"[bB])?"0" { return K_LOGICAL_ZERO; }
("1"?"'"[bB])?"1" { return K_LOGICAL_ONE; }
/* Equality operators. */
"==" { return K_EQ; }
"!=" { return K_NE; }
"===" { return K_CEQ; }
"!==" { return K_CNE; }
/* The HCHAR (hierarchy separator) is set by the SDF file itself. We
recognize here the HCHAR. */
[./] {
if (sdf_use_hchar==yytext[0])
return HCHAR;
else
return yytext[0];
}
. { return yytext[0]; }
%%
static struct {
const char*name;
int code;
} keywords[] = {
{ "ABSOLUTE", K_ABSOLUTE },
{ "CELL", K_CELL },
{ "CELLTYPE", K_CELLTYPE },
{ "DATE", K_DATE },
{ "DELAY", K_DELAY },
{ "DELAYFILE", K_DELAYFILE },
{ "DESIGN", K_DESIGN },
{ "DIVIDER", K_DIVIDER },
{ "HOLD", K_HOLD },
{ "INCREMENT", K_INCREMENT },
{ "INTERCONNECT",K_INTERCONNECT },
{ "INSTANCE", K_INSTANCE },
{ "IOPATH", K_IOPATH },
{ "PROCESS", K_PROCESS },
{ "PROGRAM", K_PROGRAM },
{ "RECREM", K_RECREM },
{ "RECOVERY", K_RECOVERY },
{ "REMOVAL", K_REMOVAL },
{ "SDFVERSION", K_SDFVERSION },
{ "SETUP", K_SETUP },
{ "SETUPHOLD", K_SETUPHOLD },
{ "TEMPERATURE",K_TEMPERATURE },
{ "TIMESCALE", K_TIMESCALE },
{ "TIMINGCHECK",K_TIMINGCHECK },
{ "VENDOR", K_VENDOR },
{ "VERSION", K_VERSION },
{ "VOLTAGE", K_VOLTAGE },
{ "WIDTH", K_WIDTH },
{ 0, IDENTIFIER }
};
void start_edge_id(unsigned cond)
{
if (cond) BEGIN(COND_EDGE_ID);
else BEGIN(EDGE_ID);
}
void stop_edge_id(void)
{
BEGIN(0);
}
static int lookup_keyword(const char*text)
{
unsigned idx, len, skip;
for (idx = 0 ; keywords[idx].name ; idx += 1) {
if (strcasecmp(text, keywords[idx].name) == 0)
return keywords[idx].code;
}
/* Process any escaped characters. */
skip = 0;
len = strlen(yytext);
for (idx = 0; idx < len; idx += 1) {
if (yytext[idx] == '\\') {
skip += 1;
idx += 1;
}
yytext[idx-skip] = yytext[idx];
}
yytext[idx-skip] = 0;
yylval.string_val = strdup(yytext);
return IDENTIFIER;
}
/*
* Create a string without the leading and trailing quotes.
*/
static void process_quoted_string(void)
{
char*endp;
yylval.string_val = strdup(yytext+1);
endp = yylval.string_val+strlen(yylval.string_val);
assert(endp[-1] == '"');
endp[-1] = 0;
}
/*
* Modern version of flex (>=2.5.9) can clean up the scanner data.
*/
static void destroy_sdf_lexor()
{
# ifdef FLEX_SCANNER
# if YY_FLEX_MAJOR_VERSION >= 2 && YY_FLEX_MINOR_VERSION >= 5
# if defined(YY_FLEX_SUBMINOR_VERSION) && YY_FLEX_SUBMINOR_VERSION >= 9
yylex_destroy();
# endif
# endif
# endif
}
extern int sdfparse(void);
void sdf_process_file(FILE*fd, const char*path)
{
yyrestart(fd);
sdf_parse_path = path;
sdfparse();
destroy_sdf_lexor();
sdf_parse_path = 0;
}