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Library.cpp
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Library.cpp
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/* Cycript - Optimizing JavaScript Compiler/Runtime
* Copyright (C) 2009-2010 Jay Freeman (saurik)
*/
/* GNU Lesser General Public License, Version 3 {{{ */
/*
* Cycript 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 3 of the License, or (at your
* option) any later version.
*
* Cycript 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 Cycript. If not, see <http://www.gnu.org/licenses/>.
**/
/* }}} */
#include <dlfcn.h>
#include <iconv.h>
#include "cycript.hpp"
#include "Pooling.hpp"
#include <sys/mman.h>
#include <iostream>
#include <ext/stdio_filebuf.h>
#include <set>
#include <map>
#include <iomanip>
#include <sstream>
#include <cmath>
#include "Parser.hpp"
#include "Cycript.tab.hh"
#include "Error.hpp"
#include "String.hpp"
#include "Execute.hpp"
/* C Strings {{{ */
template <typename Type_>
_finline size_t iconv_(size_t (*iconv)(iconv_t, Type_, size_t *, char **, size_t *), iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) {
return iconv(cd, const_cast<Type_>(inbuf), inbytesleft, outbuf, outbytesleft);
}
#ifdef __GLIBC__
#define UCS_2_INTERNAL "UCS-2"
#else
#define UCS_2_INTERNAL "UCS-2-INTERNAL"
#endif
CYUTF8String CYPoolUTF8String(apr_pool_t *pool, CYUTF16String utf16) {
_assert(pool != NULL);
const char *in(reinterpret_cast<const char *>(utf16.data));
iconv_t conversion(_syscall(iconv_open("UTF-8", UCS_2_INTERNAL)));
// XXX: this is wrong
size_t size(utf16.size * 5);
char *out(new(pool) char[size]);
CYUTF8String utf8(out, size);
size = utf16.size * 2;
_syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf8.size));
*out = '\0';
utf8.size = out - utf8.data;
_syscall(iconv_close(conversion));
return utf8;
}
CYUTF16String CYPoolUTF16String(apr_pool_t *pool, CYUTF8String utf8) {
_assert(pool != NULL);
const char *in(utf8.data);
iconv_t conversion(_syscall(iconv_open(UCS_2_INTERNAL, "UTF-8")));
// XXX: this is wrong
size_t size(utf8.size * 5);
uint16_t *temp(new (pool) uint16_t[size]);
CYUTF16String utf16(temp, size * 2);
char *out(reinterpret_cast<char *>(temp));
size = utf8.size;
_syscall(iconv_(&iconv, conversion, const_cast<char **>(&in), &size, &out, &utf16.size));
utf16.size = reinterpret_cast<uint16_t *>(out) - utf16.data;
temp[utf16.size] = 0;
_syscall(iconv_close(conversion));
return utf16;
}
/* }}} */
/* Index Offsets {{{ */
size_t CYGetIndex(const CYUTF8String &value) {
if (value.data[0] != '0') {
size_t index(0);
for (size_t i(0); i != value.size; ++i) {
if (!DigitRange_[value.data[i]])
return _not(size_t);
index *= 10;
index += value.data[i] - '0';
}
return index;
} else if (value.size == 1)
return 0;
else
return _not(size_t);
}
// XXX: this isn't actually right
bool CYGetOffset(const char *value, ssize_t &index) {
if (value[0] != '0') {
char *end;
index = strtol(value, &end, 10);
if (value + strlen(value) == end)
return true;
} else if (value[1] == '\0') {
index = 0;
return true;
}
return false;
}
/* }}} */
/* JavaScript *ify {{{ */
void CYStringify(std::ostringstream &str, const char *data, size_t size) {
unsigned quot(0), apos(0);
for (const char *value(data), *end(data + size); value != end; ++value)
if (*value == '"')
++quot;
else if (*value == '\'')
++apos;
bool single(quot > apos);
str << (single ? '\'' : '"');
for (const char *value(data), *end(data + size); value != end; ++value)
switch (*value) {
case '\\': str << "\\\\"; break;
case '\b': str << "\\b"; break;
case '\f': str << "\\f"; break;
case '\n': str << "\\n"; break;
case '\r': str << "\\r"; break;
case '\t': str << "\\t"; break;
case '\v': str << "\\v"; break;
case '"':
if (!single)
str << "\\\"";
else goto simple;
break;
case '\'':
if (single)
str << "\\'";
else goto simple;
break;
default:
// this test is designed to be "awesome", generating neither warnings nor incorrect results
if (*value < 0x20 || *value >= 0x7f)
str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(uint8_t(*value));
else simple:
str << *value;
}
str << (single ? '\'' : '"');
}
void CYNumerify(std::ostringstream &str, double value) {
char string[32];
// XXX: I want this to print 1e3 rather than 1000
sprintf(string, "%.17g", value);
str << string;
}
bool CYIsKey(CYUTF8String value) {
const char *data(value.data);
size_t size(value.size);
if (size == 0)
return false;
if (DigitRange_[data[0]]) {
size_t index(CYGetIndex(value));
if (index == _not(size_t))
return false;
} else {
if (!WordStartRange_[data[0]])
return false;
for (size_t i(1); i != size; ++i)
if (!WordEndRange_[data[i]])
return false;
}
return true;
}
/* }}} */
double CYCastDouble(const char *value, size_t size) {
char *end;
double number(strtod(value, &end));
if (end != value + size)
return NAN;
return number;
}
double CYCastDouble(const char *value) {
return CYCastDouble(value, strlen(value));
}
extern "C" void CydgetPoolParse(apr_pool_t *remote, const uint16_t **data, size_t *size) {
CYLocalPool local;
CYDriver driver;
cy::parser parser(driver);
CYUTF8String utf8(CYPoolUTF8String(local, CYUTF16String(*data, *size)));
driver.data_ = utf8.data;
driver.size_ = utf8.size;
if (parser.parse() != 0 || !driver.errors_.empty())
return;
CYOptions options;
CYContext context(options);
driver.program_->Replace(context);
std::ostringstream str;
CYOutput out(str, options);
out << *driver.program_;
std::string code(str.str());
CYUTF16String utf16(CYPoolUTF16String(remote, CYUTF8String(code.c_str(), code.size())));
*data = utf16.data;
*size = utf16.size;
}
static apr_pool_t *Pool_;
static bool initialized_;
void CYInitializeStatic() {
if (!initialized_)
initialized_ = true;
else return;
_aprcall(apr_initialize());
_aprcall(apr_pool_create(&Pool_, NULL));
}
apr_pool_t *CYGetGlobalPool() {
CYInitializeStatic();
return Pool_;
}
void CYThrow(const char *format, ...) {
va_list args;
va_start(args, format);
throw CYPoolError(format, args);
// XXX: does this matter? :(
va_end(args);
}
const char *CYPoolError::PoolCString(apr_pool_t *pool) const {
return apr_pstrdup(pool, message_);
}
CYPoolError::CYPoolError(const char *format, ...) {
va_list args;
va_start(args, format);
message_ = apr_pvsprintf(pool_, format, args);
va_end(args);
}
CYPoolError::CYPoolError(const char *format, va_list args) {
message_ = apr_pvsprintf(pool_, format, args);
}