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%{ /* -*- c -*- */
/*
* Lexer for PPD files.
*
* Copyright (c) 1988, 89, 90, 91, 92, 93 Miguel Santana
* Copyright (c) 1995, 96, 97, 98 Akim Demaille, Miguel Santana
*
*/
/*
* This file is part of a2ps.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, 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; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* $Id: lexppd.l,v 1.1.1.1.2.1 2007/12/29 01:58:19 mhatta Exp $
*/
#include "a2ps.h"
#include "lexppd.h"
#include "ppd.h"
#include "parseppd.h"
#include "routines.h"
#include "xobstack.h"
#include "message.h"
#include "pathwalk.h"
/* File currently parsed, and the path where to find PPD files. */
char * ppdfilename;
char * const *ppdpath;
int yylex PARAMS ((void));
void yyerror PARAMS ((const char *));
/* Initilizes the obstacks */
void ppdlex_initialize PARAMS ((void));
/* Obstack for strings reading */
static struct obstack string_stack;
/* Stack to handle included PPD files. */
#define MAX_INCLUDE_DEPTH 10
static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
static char *filename_stack[MAX_INCLUDE_DEPTH];
static int include_stack_ptr = 0;
%}
%option yylineno
%option prefix="ppd"
%option outfile="lex.yy.c"
%x STATE_STRING
%x STATE_USTRING
%x STATE_INCLUDE
eol \n|\r\n
comment \*%.*{eol}
blank [ \t\f]*
symbol [^/#, \t\r\f\n\":()+]*
%%
{comment} { ; }
{blank} { ; }
\" { BEGIN STATE_STRING; }
\/ { BEGIN STATE_USTRING; }
"*Include:" { BEGIN STATE_INCLUDE; }
"*DefaultFont" { return tDefaultFont; }
"*Font" { return tFont; }
"*ModelName" { return tModelName; }
"*NickName" { return tNickName; }
{symbol} { yylval.string = xstrdup (yytext);
return SYMBOL;
}
. { return yytext[0]; }
{eol} { return EOL; }
<STATE_STRING>{ /* string of characters */
\" { /* return the string */
char * string;
obstack_1grow (&string_stack, '\0');
string = obstack_finish (&string_stack);
obstack_free (&string_stack, string);
BEGIN INITIAL; /* Return to the regular scanning */
yylval.string = xstrdup (string);
return STRING;
}
\\[0-7]{1,3} {
int value = yytext[1] - '0';
char *cursor = yytext + 2;
while (*cursor)
value = 8 * value + *cursor++ - '0';
obstack_1grow (&string_stack, value);
}
\\x[0-9a-fA-F]{1,2} {
int value = 0;
char *cursor = yytext + 2;
while (*cursor)
if (*cursor >= 'a' && *cursor <= 'f')
value = 16 * value + *cursor++ - 'a' + 10;
else if (*cursor >= 'A' && *cursor <= 'F')
value = 16 * value + *cursor++ - 'A' + 10;
else
value = 16 * value + *cursor++ - '0';
obstack_1grow (&string_stack, value);
}
\\a { obstack_1grow (&string_stack, '\007'); }
\\b { obstack_1grow (&string_stack, '\b'); }
\\d { obstack_1grow (&string_stack, 127); }
\\e { obstack_1grow (&string_stack, 27); }
\\f { obstack_1grow (&string_stack, '\f'); }
\\n { obstack_1grow (&string_stack, '\n'); }
\\r { obstack_1grow (&string_stack, '\r'); }
\\t { obstack_1grow (&string_stack, '\t'); }
\\v { obstack_1grow (&string_stack, '\v'); }
\\. { obstack_1grow (&string_stack, yytext[1]); }
[^\"]+ { /* \n are legal in string */
obstack_grow (&string_stack, yytext, yyleng);
}
}
<STATE_USTRING>{ /* string of characters */
[:\n] { /* return the string */
uchar * string;
obstack_1grow (&string_stack, '\0');
string = (uchar *) obstack_finish (&string_stack);
obstack_free (&string_stack, string);
BEGIN INITIAL; /* Return to the regular scanning */
yylval.ustring = xustrdup (string);
return USTRING;
}
\\[0-7]{1,3} {
int value = yytext[1] - '0';
char *cursor = yytext + 2;
while (*cursor)
value = 8 * value + *cursor++ - '0';
obstack_1grow (&string_stack, value);
}
\\x[0-9a-fA-F]{1,2} {
int value = 0;
char *cursor = yytext + 2;
while (*cursor)
if (*cursor >= 'a' && *cursor <= 'f')
value = 16 * value + *cursor++ - 'a' + 10;
else if (*cursor >= 'A' && *cursor <= 'F')
value = 16 * value + *cursor++ - 'A' + 10;
else
value = 16 * value + *cursor++ - '0';
obstack_1grow (&string_stack, value);
}
\\a { obstack_1grow (&string_stack, '\007'); }
\\b { obstack_1grow (&string_stack, '\b'); }
\\d { obstack_1grow (&string_stack, 127); }
\\e { obstack_1grow (&string_stack, 27); }
\\f { obstack_1grow (&string_stack, '\f'); }
\\n { obstack_1grow (&string_stack, '\n'); }
\\r { obstack_1grow (&string_stack, '\r'); }
\\t { obstack_1grow (&string_stack, '\t'); }
\\v { obstack_1grow (&string_stack, '\v'); }
\\. { obstack_1grow (&string_stack, yytext[1]); }
[^\n\\:]+ { /* \n are legal in string */
obstack_grow (&string_stack, yytext, yyleng);
}
}
<STATE_INCLUDE>{ /* Including another PPD file. */
[ \t]* { ; } /* eat the whitespace */
\"[^ \t\n]+\" { /* got the include file name */
if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
error (1, 0, _("too many includes"));
include_stack[include_stack_ptr] = YY_CURRENT_BUFFER;
filename_stack[include_stack_ptr++] = ppdfilename;
/* Skip the first quote, kill the last one. */
yytext ++;
yytext [yyleng - 2] = 0;
message (msg_file, (stderr, "%s:%d: includes %s\n",
ppdfilename, ppdlineno, yytext));
/* Don't put the suffix, Adobe says it's part of the name. */
ppdfilename = xpw_find_included_file (ppdpath, ppdfilename,
yytext, NULL);
yyin = xrfopen (ppdfilename);
yy_switch_to_buffer (yy_create_buffer (yyin, YY_BUF_SIZE));
BEGIN(INITIAL);
}
}
<<EOF>> {
message (msg_file, (stderr, "End of PPD file `%s'.\n", ppdfilename));
if (--include_stack_ptr < 0)
{
yyterminate();
}
else
{
fclose (yyin);
yy_delete_buffer (YY_CURRENT_BUFFER);
XFREE (ppdfilename);
ppdfilename = filename_stack[include_stack_ptr];
yy_switch_to_buffer (include_stack[include_stack_ptr]);
message (msg_file, (stderr, "Back to file `%s'.\n", ppdfilename));
}
}
%%
int
yywrap (void)
{
return 1;
}
/*
* Initialize the obstacks
*/
void
ppdlex_initialize (void)
{
static int first_time = 1;
if (first_time)
{
first_time = 0;
obstack_init (&string_stack);
}
/* Reset the include stack. */
include_stack_ptr = 0;
}
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