PAL.C.T MINI SHELL
/*
* phpdbg_lexer.l
*/
#include "phpdbg.h"
#include "phpdbg_cmd.h"
#include "phpdbg_parser.h"
#define LEX(v) (PHPDBG_G(lexer).v)
#define YYCTYPE unsigned char
#define YYSETCONDITION(x) LEX(state) = x;
#define YYGETCONDITION() LEX(state)
#define YYCURSOR LEX(cursor)
#define YYMARKER LEX(marker)
#define YYCTXMARKER LEX(ctxmarker)
#define yyleng LEX(len)
#define yytext ((char*) LEX(text))
#undef YYDEBUG
#define YYDEBUG(a, b)
#define YYFILL(n)
#define NORMAL 0
#define PRE_RAW 1
#define RAW 2
#define INITIAL 3
ZEND_EXTERN_MODULE_GLOBALS(phpdbg);
void phpdbg_init_lexer (phpdbg_param_t *stack, char *input) {
PHPDBG_G(parser_stack) = stack;
YYSETCONDITION(INITIAL);
LEX(text) = YYCURSOR = (unsigned char *) input;
LEX(len) = strlen(input);
}
static int unescape_string(char *s) {
switch (*s) {
case '\'':
case '\"': {
char start = *s;
size_t off = 1;
do {
if (s[off] == '\\') {
off++;
}
*s = s[off];
} while ((++s)[off] != start);
return off + 1;
}
}
return 0;
}
int phpdbg_lex (phpdbg_param_t* yylval) {
restart:
LEX(text) = YYCURSOR;
/*!re2c
re2c:yyfill:check = 0;
T_TRUE 'true'
T_YES 'yes'
T_ON 'on'
T_ENABLED 'enabled'
T_FALSE 'false'
T_NO 'no'
T_OFF 'off'
T_DISABLED 'disabled'
T_EVAL 'ev'
T_SHELL 'sh'
T_IF 'if'
T_RUN 'run'
T_RUN_SHORT "r"
WS [ \r\t]+
DIGITS [-]?[0-9\.]+
ID [^ \r\n\t:#\000]+
GENERIC_ID ([^ \r\n\t:#\000"']|":\\")+|["]([^\n\000"\\]|"\\\\"|"\\"["])+["]|[']([^\n\000'\\]|"\\\\"|"\\"['])+[']
ADDR [0][x][a-fA-F0-9]+
OPCODE (ZEND_|zend_)([A-Za-z])+
INPUT ([^\n\000#"']|["]([^\n\000"\\]|"\\\\"|"\\"["])+["]|[']([^\n\000'\\]|"\\\\"|"\\"['])+['])+
<!*> := yyleng = (size_t) YYCURSOR - (size_t) yytext;
<*>[\n\000] {
return 0;
}
<PRE_RAW, NORMAL>"-r"{WS}?{DIGITS} {
char *text = yytext + 2;
while (*++text < '0');
yylval->num = atoi(text);
return T_REQ_ID;
}
<NORMAL>{T_IF}{WS} {
YYSETCONDITION(RAW);
phpdbg_init_param(yylval, EMPTY_PARAM);
return T_IF;
}
<NORMAL>"#"/{DIGITS} {
return T_POUND;
}
<*>"#" {
YYSETCONDITION(INITIAL);
return T_SEPARATOR;
}
<NORMAL>"::" {
return T_DCOLON;
}
<NORMAL>":"/[^\\] {
return T_COLON;
}
<NORMAL>{ID}"://" {
phpdbg_init_param(yylval, STR_PARAM);
yylval->str = estrndup(yytext, yyleng);
yylval->len = yyleng;
return T_PROTO;
}
<NORMAL>({T_YES}|{T_ON}|{T_ENABLED}|{T_TRUE})/[ \r\t\n\000] {
phpdbg_init_param(yylval, NUMERIC_PARAM);
yylval->num = 1;
return T_TRUTHY;
}
<NORMAL>({T_NO}|{T_OFF}|{T_DISABLED}|{T_FALSE})/[ \r\t\n\000] {
phpdbg_init_param(yylval, NUMERIC_PARAM);
yylval->num = 0;
return T_FALSY;
}
<NORMAL>{DIGITS} {
phpdbg_init_param(yylval, NUMERIC_PARAM);
yylval->num = atoi(yytext);
return T_DIGITS;
}
<NORMAL>{ADDR} {
phpdbg_init_param(yylval, ADDR_PARAM);
yylval->addr = strtoul(yytext, 0, 16);
return T_ADDR;
}
<NORMAL>{OPCODE} {
phpdbg_init_param(yylval, OP_PARAM);
yylval->str = estrndup(yytext, yyleng);
yylval->len = yyleng;
return T_OPCODE;
}
<NORMAL>{GENERIC_ID} {
phpdbg_init_param(yylval, STR_PARAM);
yylval->str = estrndup(yytext, yyleng - unescape_string(yytext));
yylval->len = yyleng;
return T_ID;
}
<RAW>{INPUT} {
phpdbg_init_param(yylval, STR_PARAM);
yylval->str = estrndup(yytext, yyleng - unescape_string(yytext));
yylval->len = yyleng;
return T_INPUT;
}
<*>{WS} {
/* ignore whitespace */
goto restart;
}
<INITIAL>{T_EVAL}{WS} {
YYSETCONDITION(PRE_RAW);
phpdbg_init_param(yylval, EMPTY_PARAM);
return T_EVAL;
}
<INITIAL>{T_SHELL}{WS} {
YYSETCONDITION(PRE_RAW);
phpdbg_init_param(yylval, EMPTY_PARAM);
return T_SHELL;
}
<INITIAL>({T_RUN}|{T_RUN_SHORT}){WS} {
YYSETCONDITION(PRE_RAW);
phpdbg_init_param(yylval, EMPTY_PARAM);
return T_RUN;
}
<PRE_RAW>[^ ] {
YYSETCONDITION(RAW);
YYCURSOR = LEX(text);
goto restart;
}
<INITIAL>[^ ] {
YYSETCONDITION(NORMAL);
YYCURSOR = LEX(text);
goto restart;
}
*/
}
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