php.c

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/*
 * Copyright (c) 2003 Tama Communications Corporation
 *
 * This file is part of GNU GLOBAL.
 *
 * GNU GLOBAL 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.
 *
 * GNU GLOBAL 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 St, Fifth Floor, Boston, MA  02110-1301  USA.
 */

/*
 * scanner for PHP source code.
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDARG_H
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#ifdef STDC_HEADERS
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif

#include "defined.h"
#include "die.h"
#include "gparam.h"
#include "gctags.h"
#include "linetable.h"
#include "strbuf.h"
#include "php_res.h"

#define lex_symbol_generation_rule(x) php_ ## x
#define LEXLEX lex_symbol_generation_rule(lex)
#define LEXTEXT lex_symbol_generation_rule(text)
#define LEXLENG lex_symbol_generation_rule(leng)
#define LEXRESTART lex_symbol_generation_rule(restart)
#define LEXLINENO lex_symbol_generation_rule(lineno)

#define PHP_TOKEN		1
#define PHP_VARIABLE		2
#define PHP_STRING		3
#define PHP_POINTER		4
#define PHP_DOLLAR		5
#define PHP_LPAREN		'('
#define PHP_RPAREN		')'
#define PHP_LBRACE		'{'
#define PHP_RBRACE		'}'
#define PHP_LBRACK		'['
#define PHP_RBRACK		']'

#ifdef HAVE_STDARG_H
static void debug_print(const char *, ...);
#else
static void debug_print();
#endif

static int level;			/* block nest level */
static STRBUF *string;			/* string */

/*
 * For debug.
 */
static void
#ifdef HAVE_STDARG_H
debug_print(const char *s, ...)
#else
debug_print(s, va_alist)
	const char *s;
	va_dcl
#endif
{
	va_list ap;

	if (!debug)
		return;
#ifdef HAVE_STDARG_H
	va_start(ap, s);
#else
	va_start(ap);
#endif
	(void)vfprintf(stderr, s, ap);
	va_end(ap);
}
#ifdef YYLMAX
#undef YYLMAX
#endif
#define YYLMAX 1024
#ifdef ECHO
#undef ECHO
#endif
#define ECHO debug_print("%s", LEXTEXT)
#ifdef PUT
#undef PUT
#endif
#define PUT(tag, lno, file) do {					\
	if (!nflag) {							\
		fprintf(stdout, "%-16s %4d %-16s ",tag, lno, file);	\
		linetable_print(stdout, lno);				\
	}								\
} while (0)

/*
 * IO routine.
 */
#define YY_INPUT(buf,result,max_size) \
	do { \
		if ((result = linetable_read(buf, max_size)) == -1) \
			result = YY_NULL; \
	} while (0)
/* Definitions */
/* We accept multi-bytes character */
#define PHP 1
#define STRING 2
#define LITERAL 3

#define YY_NO_UNPUT 1
#line 681 "php.c"

/* Macros after this point can all be overridden by user definitions in
 * section 1.
 */

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int yywrap YY_PROTO(( void ));
#else
extern int yywrap YY_PROTO(( void ));
#endif
#endif

#ifndef YY_NO_UNPUT
static void yyunput YY_PROTO(( int c, char *buf_ptr ));
#endif

#ifndef yytext_ptr
static void yy_flex_strncpy YY_PROTO(( char *, yyconst char *, int ));
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen YY_PROTO(( yyconst char * ));
#endif

#ifndef YY_NO_INPUT
#ifdef __cplusplus
static int yyinput YY_PROTO(( void ));
#else
static int input YY_PROTO(( void ));
#endif
#endif

#if YY_STACK_USED
static int yy_start_stack_ptr = 0;
static int yy_start_stack_depth = 0;
static int *yy_start_stack = 0;
#ifndef YY_NO_PUSH_STATE
static void yy_push_state YY_PROTO(( int new_state ));
#endif
#ifndef YY_NO_POP_STATE
static void yy_pop_state YY_PROTO(( void ));
#endif
#ifndef YY_NO_TOP_STATE
static int yy_top_state YY_PROTO(( void ));
#endif

#else
#define YY_NO_PUSH_STATE 1
#define YY_NO_POP_STATE 1
#define YY_NO_TOP_STATE 1
#endif

#ifdef YY_MALLOC_DECL
YY_MALLOC_DECL
#else
#if __STDC__
#ifndef __cplusplus
#include <stdlib.h>
#endif
#else
/* Just try to get by without declaring the routines.  This will fail
 * miserably on non-ANSI systems for which sizeof(size_t) != sizeof(int)
 * or sizeof(void*) != sizeof(int).
 */
#endif
#endif

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#define YY_READ_BUF_SIZE 8192
#endif

/* Copy whatever the last rule matched to the standard output. */

#ifndef ECHO
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
	if ( yy_current_buffer->yy_is_interactive ) \
		{ \
		int c = '*', n; \
		for ( n = 0; n < max_size && \
			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
			buf[n] = (char) c; \
		if ( c == '\n' ) \
			buf[n++] = (char) c; \
		if ( c == EOF && ferror( yyin ) ) \
			YY_FATAL_ERROR( "input in flex scanner failed" ); \
		result = n; \
		} \
	else if ( ((result = fread( buf, 1, max_size, yyin )) == 0) \
		  && ferror( yyin ) ) \
		YY_FATAL_ERROR( "input in flex scanner failed" );
#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
#endif

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL int yylex YY_PROTO(( void ))
#endif

/* Code executed at the beginning of each rule, after yytext and yyleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK break;
#endif

#define YY_RULE_SETUP \
	YY_USER_ACTION

YY_DECL
	{
	register yy_state_type yy_current_state;
	register char *yy_cp, *yy_bp;
	register int yy_act;

#line 143 "php.l"

#line 834 "php.c"

	if ( yy_init )
		{
		yy_init = 0;

#ifdef YY_USER_INIT
		YY_USER_INIT;
#endif

		if ( ! yy_start )
			yy_start = 1;	/* first start state */

		if ( ! yyin )
			yyin = stdin;

		if ( ! yyout )
			yyout = stdout;

		if ( ! yy_current_buffer )
			yy_current_buffer =
				yy_create_buffer( yyin, YY_BUF_SIZE );

		yy_load_buffer_state();
		}

	while ( 1 )		/* loops until end-of-file is reached */
		{
		yy_cp = yy_c_buf_p;

		/* Support of yytext. */
		*yy_cp = yy_hold_char;

		/* yy_bp points to the position in yy_ch_buf of the start of
		 * the current run.
		 */
		yy_bp = yy_cp;

		yy_current_state = yy_start;
		yy_state_ptr = yy_state_buf;
		*yy_state_ptr++ = yy_current_state;
yy_match:
		do
			{
			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
			while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
				{
				yy_current_state = (int) yy_def[yy_current_state];
				if ( yy_current_state >= 168 )
					yy_c = yy_meta[(unsigned int) yy_c];
				}
			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
			*yy_state_ptr++ = yy_current_state;
			++yy_cp;
			}
		while ( yy_base[yy_current_state] != 316 );

yy_find_action:
		yy_current_state = *--yy_state_ptr;
		yy_lp = yy_accept[yy_current_state];
find_rule: /* we branch to this label when backing up */
		for ( ; ; ) /* until we find what rule we matched */
			{
			if ( yy_lp && yy_lp < yy_accept[yy_current_state + 1] )
				{
				yy_act = yy_acclist[yy_lp];
					{
					yy_full_match = yy_cp;
					break;
					}
				}
			--yy_cp;
			yy_current_state = *--yy_state_ptr;
			yy_lp = yy_accept[yy_current_state];
			}

		YY_DO_BEFORE_ACTION;

		if ( yy_act != YY_END_OF_BUFFER )
			{
			int yyl;
			for ( yyl = 0; yyl < yyleng; ++yyl )
				if ( yytext[yyl] == '\n' )
					++yylineno;
			}

do_action:	/* This label is used only to access EOF actions. */


		switch ( yy_act )
	{ /* beginning of action switch */
case 1:
YY_RULE_SETUP
#line 144 "php.l"
ECHO;
	YY_BREAK
/* Start PHP */
case 2:
YY_RULE_SETUP
#line 146 "php.l"
ECHO; BEGIN PHP;
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 147 "php.l"
ECHO; BEGIN PHP;
	YY_BREAK
case 4:
YY_RULE_SETUP
#line 148 "php.l"
ECHO; BEGIN PHP;
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 149 "php.l"
ECHO; BEGIN PHP;
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 150 "php.l"
ECHO; BEGIN PHP;
	YY_BREAK
/* Ignore HTML */
case 7:
YY_RULE_SETUP
#line 152 "php.l"
ECHO;
	YY_BREAK
/* End of PHP */
case 8:
YY_RULE_SETUP
#line 154 "php.l"
ECHO; BEGIN INITIAL;
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 155 "php.l"
ECHO; BEGIN INITIAL;
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 156 "php.l"
ECHO; BEGIN INITIAL;
	YY_BREAK
/* Comment */
case 11:
YY_RULE_SETUP
#line 159 "php.l"
{
				int c;

				debug_print("</*");
				while ((c = input()) != EOF) {
					debug_print("%c", c);
					if (c == '*') {
						while ((c = input()) != EOF && c == '*')
							debug_print("%c", c);
						debug_print("%c", c);
						if (c == EOF || c == '/')
							break;
					}
				}
				if (c == EOF)
					die("unexpected end of comment.");
				debug_print(">");
			}
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 177 "php.l"
debug_print("<%s>", LEXTEXT);
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 178 "php.l"
debug_print("<%s>", LEXTEXT);
	YY_BREAK
/* String */
case 14:
YY_RULE_SETUP
#line 181 "php.l"
{ strbuf_reset(string); BEGIN STRING; }
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 182 "php.l"
{
				debug_print("<S:%s>", strbuf_value(string));
				BEGIN PHP;
					
				return PHP_STRING;
			}
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 188 "php.l"
strbuf_puts(string, LEXTEXT);
	YY_BREAK
case 17:
YY_RULE_SETUP
#line 189 "php.l"
strbuf_putc(string, LEXTEXT[0]);
	YY_BREAK
/* Literal */
case 18:
YY_RULE_SETUP
#line 192 "php.l"
{ strbuf_reset(string); BEGIN LITERAL; }
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 193 "php.l"
{
				debug_print("<L:%s>", strbuf_value(string));
				BEGIN PHP;
					
				return PHP_STRING;
			}
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 199 "php.l"
strbuf_puts(string, LEXTEXT);
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 200 "php.l"
strbuf_putc(string, LEXTEXT[0]);
	YY_BREAK
/* Cast */
case 22:
YY_RULE_SETUP
#line 203 "php.l"

	YY_BREAK
case 23:
YY_RULE_SETUP
#line 204 "php.l"

	YY_BREAK
case 24:
YY_RULE_SETUP
#line 205 "php.l"
{
				/*
				 * 0123456	yyleng = 6
				 * ${abc}\0
				 */
				if (YY_START == STRING)
					strbuf_puts(string, LEXTEXT);
				memcpy(LEXTEXT, &LEXTEXT[2], LEXLENG - 3);
				LEXTEXT[LEXLENG - 3] = '\0';
				LEXLENG = LEXLENG - 3;
				debug_print("<V:%s>", LEXTEXT);

				return PHP_VARIABLE;
			}
	YY_BREAK