/*-*- mode: C; tab-width:4 -*-*/
/* parser.c -- a fast parser for the PHP/Java Bridge XML protocol.
Copyright (C) 2003-2007 Jost Boekemeier
This file is part of the PHP/Java Bridge.
The PHP/Java Bridge ("the library") 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 2, or (at your option) any later version.
The library 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 the PHP/Java Bridge; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this file statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
#include "php_java.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include "parser.h"
#define APPEND(c) { \
if(i>=(*env)->len-1) { \
unsigned char* s1=realloc(s, (*env)->len*=2); \
if(!s1) exit(9); else s=(*env)->s=s1; \
} \
s[i++]=c; \
}
#define PUSH(t) { \
parser_string_t *str = tag[t].strings; \
short n = tag[t].n; \
assert((t!=0) || (t==0 && !tag[0].n)); \
s[i]=0; \
str[n].string=&((*env)->s); \
str[n].off=i0; \
str[n].length=i-i0; \
++tag[t].n; \
APPEND(0); \
i0=i; \
}
#define RESET() { \
type=VOJD;\
level=0; \
eor=0; \
blen=0; \
in_dquote=0; \
i=0; \
i0=0; \
(*env)->c=0; (*env)->pos=0; \
}
#define CALL_BEGIN() { \
if(cb->begin) (*cb->begin)(tag, cb); \
}
#define CALL_END() { \
if(cb->end) (*cb->end)(tag[0].strings, cb); \
}
short EXT_GLOBAL (parse) (proxyenv *env, parser_cb_t *cb) {
short rc;
parser_string_t v1[1], v2[MAX_ARGS], v3[MAX_ARGS];
parser_tag_t tag[] = {{0, v1}, {0, v2}, {0, v3}};
unsigned char ch;
// VOJD is VOID for f... windows (VOID is in winsock2.h)
enum {BEGIN, KEY, VAL, ENTITY, BLOB, VOJD, END} type = VOJD;
short level=0, in_dquote=0, eor=0, blen=0;
register ssize_t pos=(*env)->pos, c=(*env)->c; size_t i=0, i0=0, e;
register unsigned char *s=(*env)->s;
assert(s); if(!s) exit(9);
while(!eor) {
if(c>=pos) {
res:
errno=0;
pos=(*env)->f_recv(env, (*env)->recv_buf, sizeof (*env)->recv_buf);
if(!pos && errno==EINTR) goto res; // Solaris, see INN FAQ
if(pos<=0) break;
c=0;
}
switch(ch=(*env)->recv_buf[c])
{/* --- This block must be compilable with an ansi C compiler or javac --- */
case '<': if(in_dquote) {APPEND(ch); break;}
level++;
type=BEGIN;
break;
case '\t': case '\f': case '\n': case '\r': case ' ': if(in_dquote) {APPEND(ch); break;}
if(type==BEGIN) {
PUSH(type);
type = KEY;
}
break;
case '=': if(in_dquote) {APPEND(ch); break;}
PUSH(type);
type=VAL;
break;
case '/': if(in_dquote) {APPEND(ch); break;}
if(type==BEGIN) { type=END; level--; }
level--;
break;
case '>': if(in_dquote) {APPEND(ch); break;}
if(type==END){
PUSH(BEGIN);
CALL_END();
} else {
if(type==VAL||type==BEGIN) PUSH(type);
CALL_BEGIN();
}
tag[0].n=tag[1].n=tag[2].n=0; i0=i=0; /* RESET */
type=VOJD;
if(level==0) eor=1;
break;
case ';':
if(type==ENTITY) {
switch (s[e+1]) {
case 'l': s[e]='<'; i=e+1; break; /* lt */
case 'g': s[e]='>'; i=e+1; break; /* gt */
case 'a': s[e]= (s[e+2]=='m'?'&':'\''); i=e+1; break; /* amp, apos */
case 'q': s[e]='"'; i=e+1; break; /* quot */
default: APPEND(ch);
}
type=VAL; //& escapes may only appear in values
} else {
APPEND(ch);
}
break;
case '&':
type = ENTITY;
e=i;
APPEND(ch);
break;
case '"':
in_dquote = !in_dquote;
if(!in_dquote && type==VAL) {
PUSH(type);
type = KEY;
}
break;
default:
APPEND(ch);
}
c++;
}
rc = eor;
RESET();
return rc;
}
short EXT_GLOBAL (parse_header) (proxyenv *env, parser_cb_t *cb) {
short rc;
parser_string_t v1[1], v2[1], v3[1];
parser_tag_t tag[] = {{0, v1}, {0, v2}, {0, v3}};
unsigned char ch;
// VOJD is VOID for f... windows (VOID is in winsock2.h)
enum {BEGIN, KEY, VAL, VOJD, END} type = VOJD;
short level=0, in_dquote=0, eor=0, blen=0;
register ssize_t pos=0, c=0; size_t i=0, i0=0;
register unsigned char *s=(*env)->s;
assert(s); if(!s) exit(9);
while(!eor) {
if(c>=pos) {
res:
errno=0;
pos=(*env)->f_recv(env, (*env)->recv_buf, sizeof (*env)->recv_buf);
if(!pos && errno==EINTR) goto res; // Solaris, see INN FAQ
c=0;
if(pos<=0) break;
}
switch(ch=(*env)->recv_buf[c])
{
case '\r': case '\f': case ' ': case '\t': break; /* skip */
case '\n':
if(type==BEGIN) eor=1;
else if(type==KEY || type==VAL) {
PUSH(type);
CALL_BEGIN();
}
tag[0].n=tag[1].n=tag[2].n=0; i0=i=0; /* RESET */
in_dquote=0;
type = BEGIN;
break;
case ':': if(in_dquote) {APPEND(ch); break;}
in_dquote=1;
PUSH(type);
type=KEY;
break;
case '=':
if(type==KEY) {
PUSH(type);
type=VAL;
} else {
APPEND(ch);
}
break;
default:
APPEND(ch);
}
c++;
}
rc = eor;
RESET();
(*env)->c=c; (*env)->pos=pos;
return rc;
}
#if 0
void begin(parser_tag_t tag[3], struct parser_cb *cb){
int i;
for(i=0; i<tag[2].n; i++)
printf("<begin: %s, %s (%d, %d)\n", tag[1].strings[i].string, tag[2].strings[i].string, tag[1].strings[i].length, tag[2].strings[i].length);
}
void end(parser_string_t str[1], struct parser_cb *cb){
printf("<end> %s (%d)\n", str[0].string, str[0].length);
}
main() {
parser_cb_t cb={begin, end, 0};
FILE *f=fopen("xmltest.xml", "r");
parse(f, &cb);
fclose(f);
}
#endif
