Page MenuHomec4science
Files F61887293

scanner.l
No OneTemporary
Actions

File Metadata

Created
Thu, May 9, 14:44

scanner.l
View Options

%{
#include "ast.hpp"
#define push_state(s) xhp_new_push_state(s, yyg)
#define pop_state() xhp_new_pop_state(yyg)
#define set_state(s) xhp_set_state(s, yyg)
#define last_token() yyextra->last_token
#define YY_USER_ACTION \
if (!yyg->yy_more_len) \
yyextra->first_lineno = yyextra->lineno;
#define pttok(t, txt) \
yyextra->token_list.push_back(new xhpast::Token(t, txt, yyextra->list_size++)); \
*yylval = new xhpast::Node(0, yyextra->list_size - 1);
#define ptok(t) \
pttok(t, yytext);
#define tok(t) \
ptok(t); \
return yy_token(t, yyg)
#define YY_USER_INIT \
if (yyextra->insert_token) { \
yyg->yy_init = 0; \
int ft = yyextra->insert_token; \
yyextra->insert_token = 0; \
return yy_token(ft, yyg); \
}
using namespace std;
const char* yytokname(int tok);
static int yy_token(int tok, struct yyguts_t* yyg);
static void yy_scan_newlines(const char* text, struct yyguts_t* yyg);
%}
%option prefix="xhpast"
%option reentrant
/* PHP allows IF or if */
%option case-insensitive
%option noyywrap nodefault
%option stack
%option bison-bridge
%option 8bit
/* I think an interactive scanner is required because of the bison state
* pushing we do. I'm putting an explicit interactive declaration here in case
* someone tries adding -CF or whatever to the make flags. */
%option interactive
/* The different lexing states. Note that the transitions are done either
* in the lex actions, or in a generic manner in yy_token(). */
%s PHP
%s PHP_COMMENT
%s PHP_EOL_COMMENT
%s PHP_DOC_COMMENT
%s PHP_HEREDOC_START
%s PHP_HEREDOC_NSTART
%s PHP_HEREDOC_NEWLINE
%s PHP_HEREDOC_DATA
%s PHP_NO_RESERVED_WORDS
%s PHP_NO_RESERVED_WORDS_PERSIST
%s PHP_
LNUM [0-9]+
DNUM ([0-9]*"."[0-9]+)|([0-9]+"."[0-9]*)
EXPONENT_DNUM (({LNUM}|{DNUM})[eE][+-]?{LNUM})
HNUM "0x"[0-9a-fA-F]+
LABEL [a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*
BYTE (.|\n)
WHITESPACE [ \n\r\t]+
TABS_AND_SPACES [ \t]*
NEWLINE ("\r\n"|"\n"|"\r")
%%
/* Open / close PHP + inline HTML */
<INITIAL>{
"<?php"([ \t]|{NEWLINE}) {
yy_scan_newlines(yytext + 5, yyg);
// the state transition will be done in yy_token()
tok(T_OPEN_TAG);
}
"<?" {
if (yyextra->short_tags) {
tok(T_OPEN_TAG);
} else {
tok(T_INLINE_HTML);
}
}
"<?=" {
if (yyextra->short_tags) {
tok(T_OPEN_TAG_WITH_ECHO);
} else {
tok(T_INLINE_HTML);
}
}
"<%" {
if (yyextra->asp_tags) {
tok(T_OPEN_TAG);
} else {
tok(T_INLINE_HTML);
}
}
"<%=" {
if (yyextra->asp_tags) {
tok(T_OPEN_TAG_WITH_ECHO);
} else {
tok(T_INLINE_HTML);
}
}
"<"|[^<]* {
yy_scan_newlines(yytext, yyg);
tok(T_INLINE_HTML);
}
}
<PHP,PHP_NO_RESERVED_WORDS,PHP_NO_RESERVED_WORDS_PERSIST>{
("?>"|"</script"{WHITESPACE}*">"){NEWLINE}? {
yy_scan_newlines(yytext + 2, yyg);
tok(T_CLOSE_TAG);
}
"%>" {
if (yyextra->asp_tags) {
tok(T_CLOSE_TAG);
} else {
yyless(1);
tok(yytext[0]);
}
}
}
/* Comments and whitespace */
<PHP,PHP_NO_RESERVED_WORDS,PHP_NO_RESERVED_WORDS_PERSIST>{
"#"|"//" {
push_state(PHP_EOL_COMMENT);
yymore();
}
"/**"{WHITESPACE} {
yy_scan_newlines(yytext + 3, yyg);
push_state(PHP_DOC_COMMENT);
yymore();
}
"/*" {
push_state(PHP_COMMENT);
yymore();
}
{WHITESPACE}+ {
yy_scan_newlines(yytext, yyg);
ptok(T_WHITESPACE);
}
}
<PHP_EOL_COMMENT><<EOF>> {
ptok(T_COMMENT);
pop_state();
}
<PHP_EOL_COMMENT>{
{NEWLINE} {
++yyextra->lineno;
ptok(T_COMMENT);
pop_state();
}
[^\r\n?]+ yymore();
"?>" {
yyless(yyleng - 2);
ptok(T_COMMENT);
pop_state();
}
. yymore();
}
<PHP_DOC_COMMENT,PHP_COMMENT>{
{NEWLINE} {
++yyextra->lineno;
yymore();
}
[^*\r\n]+|"*" yymore();
}
<PHP_DOC_COMMENT>"*/" {
ptok(T_DOC_COMMENT);
pop_state();
}
<PHP_DOC_COMMENT><<EOF>> {
ptok(T_DOC_COMMENT);
pop_state();
}
<PHP_COMMENT>"*/" {
ptok(T_COMMENT);
pop_state();
}
<PHP_COMMENT><<EOF>> {
ptok(T_COMMENT);
pop_state();
}
/* Reserved words */
<PHP>{
include tok(T_INCLUDE);
include_once tok(T_INCLUDE_ONCE);
eval tok(T_EVAL);
require tok(T_REQUIRE);
require_once tok(T_REQUIRE_ONCE);
or tok(T_LOGICAL_OR);
xor tok(T_LOGICAL_XOR);
and tok(T_LOGICAL_AND);
print tok(T_PRINT);
instanceof tok(T_INSTANCEOF);
new tok(T_NEW);
clone tok(T_CLONE);
exit tok(T_EXIT);
if tok(T_IF);
elseif tok(T_ELSEIF);
else tok(T_ELSE);
endif tok(T_ENDIF);
echo tok(T_ECHO);
do tok(T_DO);
while tok(T_WHILE);
endwhile tok(T_ENDWHILE);
for tok(T_FOR);
endfor tok(T_ENDFOR);
foreach tok(T_FOREACH);
endforeach tok(T_ENDFOREACH);
declare tok(T_DECLARE);
enddeclare tok(T_ENDDECLARE);
as tok(T_AS);
switch tok(T_SWITCH);
endswitch tok(T_ENDSWITCH);
case tok(T_CASE);
default tok(T_DEFAULT);
break tok(T_BREAK);
continue tok(T_CONTINUE);
goto tok(T_GOTO);
function tok(T_FUNCTION);
const tok(T_CONST);
return tok(T_RETURN);
try tok(T_TRY);
catch tok(T_CATCH);
throw tok(T_THROW);
use tok(T_USE);
global tok(T_GLOBAL);
static tok(T_STATIC);
abstract tok(T_ABSTRACT);
final tok(T_FINAL);
private tok(T_PRIVATE);
protected tok(T_PROTECTED);
public tok(T_PUBLIC);
var tok(T_VAR);
unset tok(T_UNSET);
isset tok(T_ISSET);
empty tok(T_EMPTY);
__halt_compiler tok(T_HALT_COMPILER);
class tok(T_CLASS);
interface tok(T_INTERFACE);
extends tok(T_EXTENDS);
implements tok(T_IMPLEMENTS);
list tok(T_LIST);
array tok(T_ARRAY);
__class__ tok(T_CLASS_C);
__method__ tok(T_METHOD_C);
__function__ tok(T_FUNC_C);
__line__ tok(T_LINE);
__file__ tok(T_FILE);
namespace tok(T_NAMESPACE);
__namespace__ tok(T_NS_C);
__dir__ tok(T_DIR);
}
/* Operators */
<PHP,PHP_NO_RESERVED_WORDS,PHP_NO_RESERVED_WORDS_PERSIST>{
"+=" tok(T_PLUS_EQUAL);
"-=" tok(T_MINUS_EQUAL);
"*=" tok(T_MUL_EQUAL);
"/=" tok(T_DIV_EQUAL);
".=" tok(T_CONCAT_EQUAL);
"%=" tok(T_MOD_EQUAL);
"&=" tok(T_AND_EQUAL);
"|=" tok(T_OR_EQUAL);
"^=" tok(T_XOR_EQUAL);
"<<=" tok(T_SL_EQUAL);
">>=" tok(T_SR_EQUAL);
"||" tok(T_BOOLEAN_OR);
"&&" tok(T_BOOLEAN_AND);
"==" tok(T_IS_EQUAL);
"!="|"<>" tok(T_IS_NOT_EQUAL);
"===" tok(T_IS_IDENTICAL);
"!==" tok(T_IS_NOT_IDENTICAL);
"<=" tok(T_IS_SMALLER_OR_EQUAL);
">=" tok(T_IS_GREATER_OR_EQUAL);
"<<" tok(T_SL);
">>" tok(T_SR);
"++" tok(T_INC);
"--" tok(T_DEC);
"->" tok(T_OBJECT_OPERATOR);
"=>" tok(T_DOUBLE_ARROW);
"::" tok(T_PAAMAYIM_NEKUDOTAYIM);
"\\" tok(T_NS_SEPARATOR);
}
/* Casts */
<PHP,PHP_NO_RESERVED_WORDS,PHP_NO_RESERVED_WORDS_PERSIST>{
"("{TABS_AND_SPACES}(int|integer){TABS_AND_SPACES}")" tok(T_INT_CAST);
"("{TABS_AND_SPACES}(real|double|float){TABS_AND_SPACES}")" tok(T_DOUBLE_CAST);
"("{TABS_AND_SPACES}string{TABS_AND_SPACES}")" tok(T_STRING_CAST);
"("{TABS_AND_SPACES}unicode{TABS_AND_SPACES}")" tok(T_UNICODE_CAST);
"("{TABS_AND_SPACES}binary{TABS_AND_SPACES}")" tok(T_BINARY_CAST);
"("{TABS_AND_SPACES}array{TABS_AND_SPACES}")" tok(T_ARRAY_CAST);
"("{TABS_AND_SPACES}object{TABS_AND_SPACES}")" tok(T_OBJECT_CAST);
"("{TABS_AND_SPACES}(bool|boolean){TABS_AND_SPACES}")" tok(T_BOOL_CAST);
"("{TABS_AND_SPACES}unset{TABS_AND_SPACES}")" tok(T_UNSET_CAST);
}
/* Scalars (parsing these doesn't really matter since we just pass them through literally) */
<PHP,PHP_NO_RESERVED_WORDS,PHP_NO_RESERVED_WORDS_PERSIST>{
{LNUM}|{HNUM} tok(T_LNUMBER);
{DNUM}|{EXPONENT_DNUM} tok(T_DNUMBER);
{LABEL} tok(T_STRING);
"$"{LABEL} tok(T_VARIABLE);
b?'(\\.|\\\n|[^\\']+)*'|b?\"(\\.|\\\n|[^\\\"]+)*\" {
yy_scan_newlines(yytext, yyg);
tok(T_CONSTANT_ENCAPSED_STRING);
}
`[^`]*` {
yy_scan_newlines(yytext, yyg);
tok(T_BACKTICKS_EXPR);
}
}
/* (HERE|NOW)DOC's */
<PHP,PHP_NO_RESERVED_WORDS,PHP_NO_RESERVED_WORDS_PERSIST>b?"<<<"{TABS_AND_SPACES} {
push_state(PHP_HEREDOC_START);
yyextra->heredoc_yyleng = yyleng;
yymore();
}
<PHP_HEREDOC_START>{
"'"{LABEL}"'"|\"{LABEL}\" {
// Create a new string for the heredoc label. Since we're using yymore above
// yytext will actually start at the "<<<" and not the label. Use of
// heredoc_yyleng jumps past that. Then we add 1 to get past the " or '. The
// match is similar to calculate length.
yyextra->heredoc_label = string(yytext + yyextra->heredoc_yyleng + 1, yyleng - yyextra->heredoc_yyleng - 2);
set_state(PHP_HEREDOC_NSTART);
yyextra->heredoc_yyleng = yyleng;
yymore();
}
{LABEL} {
yyextra->heredoc_label = string(yytext + yyextra->heredoc_yyleng);
set_state(PHP_HEREDOC_NSTART);
yyextra->heredoc_yyleng = yyleng;
yymore();
}
}
<PHP_HEREDOC_NSTART>{NEWLINE} {
++yyextra->lineno;
yyextra->heredoc_data = yytext + yyleng;
set_state(PHP_HEREDOC_DATA);
yymore();
}
<PHP_HEREDOC_DATA>{
[^\r\n]*{NEWLINE} {
++yyextra->lineno;
set_state(PHP_HEREDOC_NEWLINE);
yyextra->heredoc_yyleng = yyleng;
yymore();
}
}
<PHP_HEREDOC_NEWLINE>{
{LABEL};?{NEWLINE} {
if (strncmp(yyextra->heredoc_label.c_str(), yytext + yyextra->heredoc_yyleng, yyextra->heredoc_label.size()) == 0) {
switch (yytext[yyextra->heredoc_yyleng + yyextra->heredoc_label.size()]) {
case ';': case '\n': case '\r':
yyless(yyleng - (yyleng - yyextra->heredoc_yyleng - yyextra->heredoc_label.size()));
pop_state();
tok(T_HEREDOC);
}
}
++yyextra->lineno;
yyextra->heredoc_yyleng = yyleng;
yymore();
}
[^\r\n]+ {
set_state(PHP_HEREDOC_DATA);
yyextra->heredoc_yyleng = yyleng;
yymore();
}
{NEWLINE} {
++yyextra->lineno;
yyextra->heredoc_yyleng = yyleng;
yymore();
}
}
/* Other */
<*>{BYTE} {
tok(yytext[0]);
// fix unused function warnings
yy_top_state(NULL);
yyunput(0, 0, NULL);
}
%%
#ifdef DEBUG
static const char* yy_state_name(int state) {
switch (state) {
case INITIAL:
return "INITIAL";
case PHP:
return "PHP";
case PHP_COMMENT:
return "PHP_COMMENT";
case PHP_EOL_COMMENT:
return "PHP_EOL_COMMENT";
case PHP_DOC_COMMENT:
return "PHP_DOC_COMMENT";
case PHP_HEREDOC_START:
return "PHP_HEREDOC_START";
case PHP_HEREDOC_NSTART:
return "PHP_HEREDOC_NSTART";
case PHP_HEREDOC_NEWLINE:
return "PHP_HEREDOC_NEWLINE";
case PHP_HEREDOC_DATA:
return "PHP_HEREDOC_DATA";
case PHP_NO_RESERVED_WORDS:
return "PHP_NO_RESERVED_WORDS";
case PHP_NO_RESERVED_WORDS_PERSIST:
return "PHP_NO_RESERVED_WORDS_PERSIST";
default:
return "???";
}
}
static void yy_log_token(int tok) {
const char* tokname = yytokname(tok);
if (tokname) {
fprintf(stderr, "--> %s\n", tokname);
} else {
fprintf(stderr, "--> '%c'\n", tok);
}
}
#endif
static int yy_token(int tok, yyguts_t* yyg) {
if (YY_START == PHP_NO_RESERVED_WORDS) {
pop_state();
}
switch (tok) {
case T_OPEN_TAG:
case T_OPEN_TAG_WITH_ECHO:
case T_OPEN_TAG_FAKE:
push_state(PHP);
break;
case T_CLOSE_TAG:
pop_state();
// We need to return a ';', not a T_CLOSE_TAG, because a construct like
// "<?php echo $x ?>" is valid and there are about a billion parser rules
// which terminate with ';' so making a new rule like
// "semicolon_or_close_tag" would be hard. The token in yylval has the
// correct type and value, we just don't generate a node.
return ';';
// In PHP it's ok to use keywords such as 'if' as field names
// or function names.
case T_OBJECT_OPERATOR:
case T_FUNCTION:
push_state(PHP_NO_RESERVED_WORDS);
break;
case T_PAAMAYIM_NEKUDOTAYIM:
if (yyextra->colon_hack) {
yyextra->colon_hack = false;
} else {
push_state(PHP_NO_RESERVED_WORDS);
}
break;
case '{':
// not used anymore
yyextra->curly_stack.push(tok);
break;
}
#ifdef DEBUG
yy_log_token(tok);
#endif
return yyextra->last_token = tok;
}
static inline void yy_scan_newlines(const char* text, struct yyguts_t* yyg) {
for (; *text; ++text) {
if (*text == '\r') {
if (text[1] == '\n') {
++text;
}
++yyextra->lineno;
} else if (*text == '\n') {
++yyextra->lineno;
}
}
}
void xhp_new_push_state(int s, struct yyguts_t* yyg) {
#ifdef DEBUG
fprintf(stderr, "--> PUSH(%s -> %s)\n", yy_state_name(YY_START), yy_state_name(s));
#endif
yy_push_state(s, yyg);
}
void xhp_new_pop_state(struct yyguts_t* yyg) {
#ifdef DEBUG
int s = YY_START;
#endif
yy_pop_state(yyg);
#ifdef DEBUG
fprintf(stderr, "--> POP(%s -> %s)\n", yy_state_name(s), yy_state_name(YY_START));
#endif
}
void xhp_set_state(int s, struct yyguts_t* yyg) {
#ifdef DEBUG
fprintf(stderr, "--> SET(%s)\n", yy_state_name(s));
#endif
BEGIN(s);
}

Event Timeline

c4science · Help