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Sweden-Number/dlls/jscript/lex.c

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/*
* Copyright 2008 Jacek Caban for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <limits.h>
#include <math.h>
#include "jscript.h"
#include "activscp.h"
#include "objsafe.h"
#include "engine.h"
#include "parser.h"
#include "parser.tab.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(jscript);
static const struct {
const WCHAR *word;
int token;
BOOL no_nl;
unsigned min_version;
} keywords[] = {
{L"break", kBREAK, TRUE},
{L"case", kCASE},
{L"catch", kCATCH},
{L"continue", kCONTINUE, TRUE},
{L"default", kDEFAULT},
{L"delete", kDELETE},
{L"do", kDO},
{L"else", kELSE},
{L"false", kFALSE},
{L"finally", kFINALLY},
{L"for", kFOR},
{L"function", kFUNCTION},
{L"get", kGET, FALSE, SCRIPTLANGUAGEVERSION_ES5},
{L"if", kIF},
{L"in", kIN},
{L"instanceof", kINSTANCEOF},
{L"new", kNEW},
{L"null", kNULL},
{L"return", kRETURN, TRUE},
{L"set", kSET, FALSE, SCRIPTLANGUAGEVERSION_ES5},
{L"switch", kSWITCH},
{L"this", kTHIS},
{L"throw", kTHROW},
{L"true", kTRUE},
{L"try", kTRY},
{L"typeof", kTYPEOF},
{L"var", kVAR},
{L"void", kVOID},
{L"while", kWHILE},
{L"with", kWITH}
};
static int lex_error(parser_ctx_t *ctx, HRESULT hres)
{
ctx->hres = hres;
ctx->lexer_error = TRUE;
return -1;
}
/* ECMA-262 3rd Edition 7.6 */
BOOL is_identifier_char(WCHAR c)
{
return iswalnum(c) || c == '$' || c == '_' || c == '\\';
}
static BOOL is_identifier_first_char(WCHAR c)
{
return iswalpha(c) || c == '$' || c == '_' || c == '\\';
}
static int check_keyword(parser_ctx_t *ctx, const WCHAR *word, const WCHAR **lval)
{
const WCHAR *p1 = ctx->ptr;
const WCHAR *p2 = word;
while(p1 < ctx->end && *p2) {
if(*p1 != *p2)
return *p1 - *p2;
p1++;
p2++;
}
if(*p2 || (p1 < ctx->end && is_identifier_char(*p1)))
return 1;
if(lval)
*lval = word;
ctx->ptr = p1;
return 0;
}
/* ECMA-262 3rd Edition 7.3 */
static BOOL is_endline(WCHAR c)
{
return c == '\n' || c == '\r' || c == 0x2028 || c == 0x2029;
}
static int hex_to_int(WCHAR c)
{
if('0' <= c && c <= '9')
return c-'0';
if('a' <= c && c <= 'f')
return c-'a'+10;
if('A' <= c && c <= 'F')
return c-'A'+10;
return -1;
}
static int check_keywords(parser_ctx_t *ctx, const WCHAR **lval)
{
int min = 0, max = ARRAY_SIZE(keywords)-1, r, i;
while(min <= max) {
i = (min+max)/2;
r = check_keyword(ctx, keywords[i].word, lval);
if(!r) {
if(ctx->script->version < keywords[i].min_version) {
TRACE("ignoring keyword %s in incompatible mode\n",
debugstr_w(keywords[i].word));
ctx->ptr -= lstrlenW(keywords[i].word);
return 0;
}
ctx->implicit_nl_semicolon = keywords[i].no_nl;
return keywords[i].token;
}
if(r > 0)
min = i+1;
else
max = i-1;
}
return 0;
}
static BOOL skip_html_comment(parser_ctx_t *ctx)
{
const WCHAR html_commentW[] = {'<','!','-','-',0};
if(!ctx->is_html || ctx->ptr+3 >= ctx->end ||
memcmp(ctx->ptr, html_commentW, sizeof(WCHAR)*4))
return FALSE;
ctx->nl = TRUE;
while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr++));
return TRUE;
}
static BOOL skip_comment(parser_ctx_t *ctx)
{
if(ctx->ptr+1 >= ctx->end)
return FALSE;
if(*ctx->ptr != '/') {
if(*ctx->ptr == '@' && ctx->ptr+2 < ctx->end && ctx->ptr[1] == '*' && ctx->ptr[2] == '/') {
ctx->ptr += 3;
return TRUE;
}
return FALSE;
}
switch(ctx->ptr[1]) {
case '*':
ctx->ptr += 2;
if(ctx->ptr+2 < ctx->end && *ctx->ptr == '@' && is_identifier_char(ctx->ptr[1]))
return FALSE;
while(ctx->ptr+1 < ctx->end && (ctx->ptr[0] != '*' || ctx->ptr[1] != '/'))
ctx->ptr++;
if(ctx->ptr[0] == '*' && ctx->ptr[1] == '/') {
ctx->ptr += 2;
}else {
WARN("unexpected end of file (missing end of comment)\n");
ctx->ptr = ctx->end;
}
break;
case '/':
ctx->ptr += 2;
if(ctx->ptr+2 < ctx->end && *ctx->ptr == '@' && is_identifier_char(ctx->ptr[1]))
return FALSE;
while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr))
ctx->ptr++;
break;
default:
return FALSE;
}
return TRUE;
}
static BOOL skip_spaces(parser_ctx_t *ctx)
{
while(ctx->ptr < ctx->end && (iswspace(*ctx->ptr) || *ctx->ptr == 0xFEFF /* UTF16 BOM */)) {
if(is_endline(*ctx->ptr++))
ctx->nl = TRUE;
}
return ctx->ptr != ctx->end;
}
BOOL unescape(WCHAR *str, size_t *len)
{
WCHAR *pd, *p, c, *end = str + *len;
int i;
pd = p = str;
while(p < end) {
if(*p != '\\') {
*pd++ = *p++;
continue;
}
if(++p == end)
return FALSE;
switch(*p) {
case '\'':
case '\"':
case '\\':
c = *p;
break;
case 'b':
c = '\b';
break;
case 't':
c = '\t';
break;
case 'n':
c = '\n';
break;
case 'f':
c = '\f';
break;
case 'r':
c = '\r';
break;
case 'x':
if(p + 2 >= end)
return FALSE;
i = hex_to_int(*++p);
if(i == -1)
return FALSE;
c = i << 4;
i = hex_to_int(*++p);
if(i == -1)
return FALSE;
c += i;
break;
case 'u':
if(p + 4 >= end)
return FALSE;
i = hex_to_int(*++p);
if(i == -1)
return FALSE;
c = i << 12;
i = hex_to_int(*++p);
if(i == -1)
return FALSE;
c += i << 8;
i = hex_to_int(*++p);
if(i == -1)
return FALSE;
c += i << 4;
i = hex_to_int(*++p);
if(i == -1)
return FALSE;
c += i;
break;
default:
if(is_digit(*p)) {
c = *p++ - '0';
if(p < end && is_digit(*p)) {
c = c*8 + (*p++ - '0');
if(p < end && is_digit(*p))
c = c*8 + (*p++ - '0');
}
p--;
}
else
c = *p;
}
*pd++ = c;
p++;
}
*len = pd - str;
return TRUE;
}
static int parse_identifier(parser_ctx_t *ctx, const WCHAR **ret)
{
const WCHAR *ptr = ctx->ptr++;
WCHAR *wstr;
int len;
while(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr))
ctx->ptr++;
len = ctx->ptr-ptr;
*ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
memcpy(wstr, ptr, len*sizeof(WCHAR));
wstr[len] = 0;
/* FIXME: unescape */
return tIdentifier;
}
static int parse_string_literal(parser_ctx_t *ctx, jsstr_t **ret, WCHAR endch)
{
const WCHAR *ptr = ++ctx->ptr, *ret_str = ptr;
BOOL needs_unescape = FALSE;
WCHAR *unescape_str;
size_t len;
while(ctx->ptr < ctx->end && *ctx->ptr != endch) {
if(*ctx->ptr++ == '\\') {
ctx->ptr++;
needs_unescape = TRUE;
}
}
if(ctx->ptr == ctx->end)
return lex_error(ctx, JS_E_UNTERMINATED_STRING);
len = ctx->ptr - ptr;
ctx->ptr++;
if(needs_unescape) {
ret_str = unescape_str = parser_alloc(ctx, len * sizeof(WCHAR));
if(!unescape_str)
return lex_error(ctx, E_OUTOFMEMORY);
memcpy(unescape_str, ptr, len * sizeof(WCHAR));
if(!unescape(unescape_str, &len)) {
WARN("unescape failed\n");
return lex_error(ctx, E_FAIL);
}
}
if(!(*ret = compiler_alloc_string_len(ctx->compiler, ret_str, len)))
return lex_error(ctx, E_OUTOFMEMORY);
/* FIXME: leaking string */
return tStringLiteral;
}
static literal_t *new_double_literal(parser_ctx_t *ctx, DOUBLE d)
{
literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
ret->type = LT_DOUBLE;
ret->u.dval = d;
return ret;
}
literal_t *new_boolean_literal(parser_ctx_t *ctx, BOOL bval)
{
literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
ret->type = LT_BOOL;
ret->u.bval = bval;
return ret;
}
HRESULT parse_decimal(const WCHAR **iter, const WCHAR *end, double *ret)
{
const WCHAR *ptr = *iter;
LONGLONG d = 0, hlp;
int exp = 0;
while(ptr < end && is_digit(*ptr)) {
hlp = d*10 + *(ptr++) - '0';
if(d>MAXLONGLONG/10 || hlp<0) {
exp++;
break;
}
else
d = hlp;
}
while(ptr < end && is_digit(*ptr)) {
exp++;
ptr++;
}
if(*ptr == '.') {
ptr++;
while(ptr < end && is_digit(*ptr)) {
hlp = d*10 + *(ptr++) - '0';
if(d>MAXLONGLONG/10 || hlp<0)
break;
d = hlp;
exp--;
}
while(ptr < end && is_digit(*ptr))
ptr++;
}
if(ptr < end && (*ptr == 'e' || *ptr == 'E')) {
int sign = 1, e = 0;
if(++ptr < end) {
if(*ptr == '+') {
ptr++;
}else if(*ptr == '-') {
sign = -1;
ptr++;
}else if(!is_digit(*ptr)) {
WARN("Expected exponent part\n");
return E_FAIL;
}
}
if(ptr == end) {
WARN("unexpected end of file\n");
return E_FAIL;
}
while(ptr < end && is_digit(*ptr)) {
if(e > INT_MAX/10 || (e = e*10 + *ptr++ - '0')<0)
e = INT_MAX;
}
e *= sign;
if(exp<0 && e<0 && e+exp>0) exp = INT_MIN;
else if(exp>0 && e>0 && e+exp<0) exp = INT_MAX;
else exp += e;
}
if(is_identifier_char(*ptr)) {
WARN("wrong char after zero\n");
return JS_E_MISSING_SEMICOLON;
}
*ret = exp>=0 ? d*pow(10, exp) : d/pow(10, -exp);
*iter = ptr;
return S_OK;
}
static BOOL parse_numeric_literal(parser_ctx_t *ctx, double *ret)
{
HRESULT hres;
if(*ctx->ptr == '0') {
ctx->ptr++;
if(*ctx->ptr == 'x' || *ctx->ptr == 'X') {
double r = 0;
int d;
if(++ctx->ptr == ctx->end) {
ERR("unexpected end of file\n");
return FALSE;
}
while(ctx->ptr < ctx->end && (d = hex_to_int(*ctx->ptr)) != -1) {
r = r*16 + d;
ctx->ptr++;
}
if(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr)) {
WARN("unexpected identifier char\n");
lex_error(ctx, JS_E_MISSING_SEMICOLON);
return FALSE;
}
*ret = r;
return TRUE;
}
if(is_digit(*ctx->ptr)) {
unsigned base = 8;
const WCHAR *ptr;
double val = 0;
for(ptr = ctx->ptr; ptr < ctx->end && is_digit(*ptr); ptr++) {
if(*ptr > '7') {
base = 10;
break;
}
}
do {
val = val*base + *ctx->ptr-'0';
}while(++ctx->ptr < ctx->end && is_digit(*ctx->ptr));
/* FIXME: Do we need it here? */
if(ctx->ptr < ctx->end && (is_identifier_char(*ctx->ptr) || *ctx->ptr == '.')) {
WARN("wrong char after octal literal: '%c'\n", *ctx->ptr);
lex_error(ctx, JS_E_MISSING_SEMICOLON);
return FALSE;
}
*ret = val;
return TRUE;
}
if(is_identifier_char(*ctx->ptr)) {
WARN("wrong char after zero\n");
lex_error(ctx, JS_E_MISSING_SEMICOLON);
return FALSE;
}
}
hres = parse_decimal(&ctx->ptr, ctx->end, ret);
if(FAILED(hres)) {
lex_error(ctx, hres);
return FALSE;
}
return TRUE;
}
static int next_token(parser_ctx_t *ctx, unsigned *loc, void *lval)
{
do {
if(!skip_spaces(ctx)) {
*loc = ctx->ptr - ctx->begin;
return 0;
}
}while(skip_comment(ctx) || skip_html_comment(ctx));
*loc = ctx->ptr - ctx->begin;
if(ctx->implicit_nl_semicolon) {
if(ctx->nl)
return ';';
ctx->implicit_nl_semicolon = FALSE;
}
if(iswalpha(*ctx->ptr)) {
int ret = check_keywords(ctx, lval);
if(ret)
return ret;
return parse_identifier(ctx, lval);
}
if(is_digit(*ctx->ptr)) {
double n;
if(!parse_numeric_literal(ctx, &n))
return -1;
*(literal_t**)lval = new_double_literal(ctx, n);
return tNumericLiteral;
}
switch(*ctx->ptr) {
case '{':
case '}':
case '(':
case ')':
case '[':
case ']':
case ';':
case ',':
case '~':
case '?':
return *ctx->ptr++;
case '.':
if(ctx->ptr+1 < ctx->end && is_digit(ctx->ptr[1])) {
double n;
HRESULT hres;
hres = parse_decimal(&ctx->ptr, ctx->end, &n);
if(FAILED(hres)) {
lex_error(ctx, hres);
return -1;
}
*(literal_t**)lval = new_double_literal(ctx, n);
return tNumericLiteral;
}
ctx->ptr++;
return '.';
case '<':
if(++ctx->ptr == ctx->end) {
*(int*)lval = EXPR_LESS;
return tRelOper;
}
switch(*ctx->ptr) {
case '=': /* <= */
ctx->ptr++;
*(int*)lval = EXPR_LESSEQ;
return tRelOper;
case '<': /* << */
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* <<= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNLSHIFT;
return tAssignOper;
}
*(int*)lval = EXPR_LSHIFT;
return tShiftOper;
default: /* < */
*(int*)lval = EXPR_LESS;
return tRelOper;
}
case '>':
if(++ctx->ptr == ctx->end) { /* > */
*(int*)lval = EXPR_GREATER;
return tRelOper;
}
switch(*ctx->ptr) {
case '=': /* >= */
ctx->ptr++;
*(int*)lval = EXPR_GREATEREQ;
return tRelOper;
case '>': /* >> */
if(++ctx->ptr < ctx->end) {
if(*ctx->ptr == '=') { /* >>= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNRSHIFT;
return tAssignOper;
}
if(*ctx->ptr == '>') { /* >>> */
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* >>>= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNRRSHIFT;
return tAssignOper;
}
*(int*)lval = EXPR_RRSHIFT;
return tRelOper;
}
}
*(int*)lval = EXPR_RSHIFT;
return tShiftOper;
default:
*(int*)lval = EXPR_GREATER;
return tRelOper;
}
case '+':
ctx->ptr++;
if(ctx->ptr < ctx->end) {
switch(*ctx->ptr) {
case '+': /* ++ */
ctx->ptr++;
return tINC;
case '=': /* += */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNADD;
return tAssignOper;
}
}
return '+';
case '-':
ctx->ptr++;
if(ctx->ptr < ctx->end) {
switch(*ctx->ptr) {
case '-': /* -- or --> */
ctx->ptr++;
if(ctx->is_html && ctx->nl && ctx->ptr < ctx->end && *ctx->ptr == '>') {
ctx->ptr++;
return tHTMLCOMMENT;
}
return tDEC;
case '=': /* -= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNSUB;
return tAssignOper;
}
}
return '-';
case '*':
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* *= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNMUL;
return tAssignOper;
}
return '*';
case '%':
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* %= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNMOD;
return tAssignOper;
}
return '%';
case '&':
if(++ctx->ptr < ctx->end) {
switch(*ctx->ptr) {
case '=': /* &= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNAND;
return tAssignOper;
case '&': /* && */
ctx->ptr++;
return tANDAND;
}
}
return '&';
case '|':
if(++ctx->ptr < ctx->end) {
switch(*ctx->ptr) {
case '=': /* |= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNOR;
return tAssignOper;
case '|': /* || */
ctx->ptr++;
return tOROR;
}
}
return '|';
case '^':
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* ^= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNXOR;
return tAssignOper;
}
return '^';
case '!':
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* != */
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* !== */
ctx->ptr++;
*(int*)lval = EXPR_NOTEQEQ;
return tEqOper;
}
*(int*)lval = EXPR_NOTEQ;
return tEqOper;
}
return '!';
case '=':
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* == */
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* === */
ctx->ptr++;
*(int*)lval = EXPR_EQEQ;
return tEqOper;
}
*(int*)lval = EXPR_EQ;
return tEqOper;
}
return '=';
case '/':
if(++ctx->ptr < ctx->end) {
if(*ctx->ptr == '=') { /* /= */
ctx->ptr++;
*(int*)lval = EXPR_ASSIGNDIV;
return kDIVEQ;
}
}
return '/';
case ':':
if(++ctx->ptr < ctx->end && *ctx->ptr == ':') {
ctx->ptr++;
return kDCOL;
}
return ':';
case '\"':
case '\'':
return parse_string_literal(ctx, lval, *ctx->ptr);
case '_':
case '$':
return parse_identifier(ctx, lval);
case '@':
return '@';
}
WARN("unexpected char '%c' %d\n", *ctx->ptr, *ctx->ptr);
return 0;
}
struct _cc_var_t {
ccval_t val;
struct _cc_var_t *next;
unsigned name_len;
WCHAR name[0];
};
void release_cc(cc_ctx_t *cc)
{
cc_var_t *iter, *next;
for(iter = cc->vars; iter; iter = next) {
next = iter->next;
heap_free(iter);
}
heap_free(cc);
}
static BOOL new_cc_var(cc_ctx_t *cc, const WCHAR *name, int len, ccval_t v)
{
cc_var_t *new_v;
if(len == -1)
len = lstrlenW(name);
new_v = heap_alloc(sizeof(cc_var_t) + (len+1)*sizeof(WCHAR));
if(!new_v)
return FALSE;
new_v->val = v;
memcpy(new_v->name, name, (len+1)*sizeof(WCHAR));
new_v->name_len = len;
new_v->next = cc->vars;
cc->vars = new_v;
return TRUE;
}
static cc_var_t *find_cc_var(cc_ctx_t *cc, const WCHAR *name, unsigned name_len)
{
cc_var_t *iter;
for(iter = cc->vars; iter; iter = iter->next) {
if(iter->name_len == name_len && !memcmp(iter->name, name, name_len*sizeof(WCHAR)))
return iter;
}
return NULL;
}
static BOOL init_cc(parser_ctx_t *ctx)
{
cc_ctx_t *cc;
if(ctx->script->cc)
return TRUE;
cc = heap_alloc(sizeof(cc_ctx_t));
if(!cc) {
lex_error(ctx, E_OUTOFMEMORY);
return FALSE;
}
cc->vars = NULL;
if(!new_cc_var(cc, L"_jscript", -1, ccval_bool(TRUE))
|| !new_cc_var(cc, sizeof(void*) == 8 ? L"_win64" : L"_win32", -1, ccval_bool(TRUE))
|| !new_cc_var(cc, sizeof(void*) == 8 ? L"_amd64" : L"_x86", -1, ccval_bool(TRUE))
|| !new_cc_var(cc, L"_jscript_version", -1, ccval_num(JSCRIPT_MAJOR_VERSION + (DOUBLE)JSCRIPT_MINOR_VERSION/10.0))
|| !new_cc_var(cc, L"_jscript_build", -1, ccval_num(JSCRIPT_BUILD_VERSION))) {
release_cc(cc);
lex_error(ctx, E_OUTOFMEMORY);
return FALSE;
}
ctx->script->cc = cc;
return TRUE;
}
static BOOL parse_cc_identifier(parser_ctx_t *ctx, const WCHAR **ret, unsigned *ret_len)
{
if(*ctx->ptr != '@') {
lex_error(ctx, JS_E_EXPECTED_AT);
return FALSE;
}
if(!is_identifier_first_char(*++ctx->ptr)) {
lex_error(ctx, JS_E_EXPECTED_IDENTIFIER);
return FALSE;
}
*ret = ctx->ptr;
while(++ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr));
*ret_len = ctx->ptr - *ret;
return TRUE;
}
int try_parse_ccval(parser_ctx_t *ctx, ccval_t *r)
{
if(!skip_spaces(ctx))
return -1;
if(is_digit(*ctx->ptr)) {
double n;
if(!parse_numeric_literal(ctx, &n))
return -1;
*r = ccval_num(n);
return 1;
}
if(*ctx->ptr == '@') {
const WCHAR *ident;
unsigned ident_len;
cc_var_t *cc_var;
if(!parse_cc_identifier(ctx, &ident, &ident_len))
return -1;
cc_var = find_cc_var(ctx->script->cc, ident, ident_len);
*r = cc_var ? cc_var->val : ccval_num(NAN);
return 1;
}
if(!check_keyword(ctx, L"true", NULL)) {
*r = ccval_bool(TRUE);
return 1;
}
if(!check_keyword(ctx, L"false", NULL)) {
*r = ccval_bool(FALSE);
return 1;
}
return 0;
}
static int skip_code(parser_ctx_t *ctx, BOOL exec_else)
{
int if_depth = 1;
const WCHAR *ptr;
while(1) {
ptr = wcschr(ctx->ptr, '@');
if(!ptr) {
WARN("No @end\n");
return lex_error(ctx, JS_E_EXPECTED_CCEND);
}
ctx->ptr = ptr+1;
if(!check_keyword(ctx, L"end", NULL)) {
if(--if_depth)
continue;
return 0;
}
if(exec_else && !check_keyword(ctx, L"elif", NULL)) {
if(if_depth > 1)
continue;
if(!skip_spaces(ctx) || *ctx->ptr != '(')
return lex_error(ctx, JS_E_MISSING_LBRACKET);
if(!parse_cc_expr(ctx))
return -1;
if(!get_ccbool(ctx->ccval))
continue; /* skip block of code */
/* continue parsing */
ctx->cc_if_depth++;
return 0;
}
if(exec_else && !check_keyword(ctx, L"else", NULL)) {
if(if_depth > 1)
continue;
/* parse else block */
ctx->cc_if_depth++;
return 0;
}
if(!check_keyword(ctx, L"if", NULL)) {
if_depth++;
continue;
}
ctx->ptr++;
}
}
static int cc_token(parser_ctx_t *ctx, void *lval)
{
unsigned id_len = 0;
cc_var_t *var;
ctx->ptr++;
if(!check_keyword(ctx, L"cc_on", NULL))
return init_cc(ctx) ? 0 : -1;
if(!check_keyword(ctx, L"set", NULL)) {
const WCHAR *ident;
unsigned ident_len;
cc_var_t *var;
if(!init_cc(ctx))
return -1;
if(!skip_spaces(ctx))
return lex_error(ctx, JS_E_EXPECTED_AT);
if(!parse_cc_identifier(ctx, &ident, &ident_len))
return -1;
if(!skip_spaces(ctx) || *ctx->ptr != '=')
return lex_error(ctx, JS_E_EXPECTED_ASSIGN);
ctx->ptr++;
if(!parse_cc_expr(ctx)) {
WARN("parsing CC expression failed\n");
return -1;
}
var = find_cc_var(ctx->script->cc, ident, ident_len);
if(var) {
var->val = ctx->ccval;
}else {
if(!new_cc_var(ctx->script->cc, ident, ident_len, ctx->ccval))
return lex_error(ctx, E_OUTOFMEMORY);
}
return 0;
}
if(!check_keyword(ctx, L"if", NULL)) {
if(!init_cc(ctx))
return -1;
if(!skip_spaces(ctx) || *ctx->ptr != '(')
return lex_error(ctx, JS_E_MISSING_LBRACKET);
if(!parse_cc_expr(ctx))
return -1;
if(get_ccbool(ctx->ccval)) {
/* continue parsing block inside if */
ctx->cc_if_depth++;
return 0;
}
return skip_code(ctx, TRUE);
}
if(!check_keyword(ctx, L"elif", NULL) || !check_keyword(ctx, L"else", NULL)) {
if(!ctx->cc_if_depth)
return lex_error(ctx, JS_E_SYNTAX);
return skip_code(ctx, FALSE);
}
if(!check_keyword(ctx, L"end", NULL)) {
if(!ctx->cc_if_depth)
return lex_error(ctx, JS_E_SYNTAX);
ctx->cc_if_depth--;
return 0;
}
if(!ctx->script->cc)
return lex_error(ctx, JS_E_DISABLED_CC);
while(ctx->ptr+id_len < ctx->end && is_identifier_char(ctx->ptr[id_len]))
id_len++;
if(!id_len)
return '@';
TRACE("var %s\n", debugstr_wn(ctx->ptr, id_len));
var = find_cc_var(ctx->script->cc, ctx->ptr, id_len);
ctx->ptr += id_len;
if(!var || var->val.is_num) {
*(literal_t**)lval = new_double_literal(ctx, var ? var->val.u.n : NAN);
return tNumericLiteral;
}
*(literal_t**)lval = new_boolean_literal(ctx, var->val.u.b);
return tBooleanLiteral;
}
int parser_lex(void *lval, unsigned *loc, parser_ctx_t *ctx)
{
int ret;
ctx->nl = ctx->ptr == ctx->begin;
do {
ret = next_token(ctx, loc, lval);
} while(ret == '@' && !(ret = cc_token(ctx, lval)));
return ret;
}
literal_t *parse_regexp(parser_ctx_t *ctx)
{
const WCHAR *re, *flags_ptr;
BOOL in_class = FALSE;
DWORD re_len, flags;
literal_t *ret;
TRACE("\n");
while(*--ctx->ptr != '/');
/* Simple regexp pre-parser; '/' if used in char class does not terminate regexp literal */
re = ++ctx->ptr;
while(ctx->ptr < ctx->end) {
if(*ctx->ptr == '\\') {
if(++ctx->ptr == ctx->end)
break;
}else if(in_class) {
if(*ctx->ptr == '\n')
break;
if(*ctx->ptr == ']')
in_class = FALSE;
}else {
if(*ctx->ptr == '/')
break;
if(*ctx->ptr == '[')
in_class = TRUE;
}
ctx->ptr++;
}
if(ctx->ptr == ctx->end || *ctx->ptr != '/') {
WARN("pre-parsing failed\n");
ctx->hres = JS_E_SYNTAX;
return NULL;
}
re_len = ctx->ptr-re;
flags_ptr = ++ctx->ptr;
while(ctx->ptr < ctx->end && iswalnum(*ctx->ptr))
ctx->ptr++;
ctx->hres = parse_regexp_flags(flags_ptr, ctx->ptr-flags_ptr, &flags);
if(FAILED(ctx->hres))
return NULL;
ret = parser_alloc(ctx, sizeof(literal_t));
ret->type = LT_REGEXP;
ret->u.regexp.str = compiler_alloc_string_len(ctx->compiler, re, re_len);
ret->u.regexp.flags = flags;
return ret;
}
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