Library.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include <dlfcn.h>
  23
  24 #include "cycript.hpp"
  25
  26 #include "Pooling.hpp"
  27
  28 #include <sys/mman.h>
  29
  30 #include <iostream>
  31 #include <set>
  32 #include <map>
  33 #include <iomanip>
  34 #include <sstream>
  35 #include <cmath>
  36
  37 #include "Error.hpp"
  38 #include "Execute.hpp"
  39 #include "Parser.hpp"
  40 #include "String.hpp"
  41
  42 #include "Cycript.tab.hh"
  43 #include "Driver.hpp"
  44
  45 #include "ConvertUTF.h"
  46
  47 template <>
  48 ::pthread_key_t CYLocal<CYPool>::key_ = Key_();
  49
  50 /* C Strings {{{ */
  51 CYUTF8String CYPoolUTF8String(CYPool &pool, CYUTF16String utf16) {
  52     // XXX: this is wrong
  53     size_t size(utf16.size * 5);
  54     char *temp(new(pool) char[size]);
  55
  56     const uint16_t *lhs(utf16.data);
  57     uint8_t *rhs(reinterpret_cast<uint8_t *>(temp));
  58     _assert(ConvertUTF16toUTF8(&lhs, lhs + utf16.size, &rhs, rhs + size, lenientConversion) == conversionOK);
  59
  60     *rhs = 0;
  61     return CYUTF8String(temp, reinterpret_cast<char *>(rhs) - temp);
  62 }
  63
  64 CYUTF16String CYPoolUTF16String(CYPool &pool, CYUTF8String utf8) {
  65     // XXX: this is wrong
  66     size_t size(utf8.size * 5);
  67     uint16_t *temp(new (pool) uint16_t[size]);
  68
  69     const uint8_t *lhs(reinterpret_cast<const uint8_t *>(utf8.data));
  70     uint16_t *rhs(temp);
  71     _assert(ConvertUTF8toUTF16(&lhs, lhs + utf8.size, &rhs, rhs + size, lenientConversion) == conversionOK);
  72
  73     *rhs = 0;
  74     return CYUTF16String(temp, rhs - temp);
  75 }
  76 /* }}} */
  77 /* Index Offsets {{{ */
  78 size_t CYGetIndex(const CYUTF8String &value) {
  79     if (value.data[0] != '0') {
  80         size_t index(0);
  81         for (size_t i(0); i != value.size; ++i) {
  82             if (!DigitRange_[value.data[i]])
  83                 return _not(size_t);
  84             index *= 10;
  85             index += value.data[i] - '0';
  86         }
  87         return index;
  88     } else if (value.size == 1)
  89         return 0;
  90     else
  91         return _not(size_t);
  92 }
  93
  94 // XXX: this isn't actually right
  95 bool CYGetOffset(const char *value, ssize_t &index) {
  96     if (value[0] != '0') {
  97         char *end;
  98         index = strtol(value, &end, 10);
  99         if (value + strlen(value) == end)
 100             return true;
 101     } else if (value[1] == '\0') {
 102         index = 0;
 103         return true;
 104     }
 105
 106     return false;
 107 }
 108 /* }}} */
 109 /* JavaScript *ify {{{ */
 110 void CYStringify(std::ostringstream &str, const char *data, size_t size) {
 111     unsigned quot(0), apos(0);
 112     for (const char *value(data), *end(data + size); value != end; ++value)
 113         if (*value == '"')
 114             ++quot;
 115         else if (*value == '\'')
 116             ++apos;
 117
 118     bool single(quot > apos);
 119
 120     str << (single ? '\'' : '"');
 121
 122     for (const char *value(data), *end(data + size); value != end; ++value)
 123         switch (uint8_t next = *value) {
 124             case '\\': str << "\\\\"; break;
 125             case '\b': str << "\\b"; break;
 126             case '\f': str << "\\f"; break;
 127             case '\n': str << "\\n"; break;
 128             case '\r': str << "\\r"; break;
 129             case '\t': str << "\\t"; break;
 130             case '\v': str << "\\v"; break;
 131
 132             case '"':
 133                 if (!single)
 134                     str << "\\\"";
 135                 else goto simple;
 136             break;
 137
 138             case '\'':
 139                 if (single)
 140                     str << "\\'";
 141                 else goto simple;
 142             break;
 143
 144             case '\0':
 145                 if (value[1] >= '0' && value[1] <= '9')
 146                     str << "\\x00";
 147                 else
 148                     str << "\\0";
 149             break;
 150
 151             default:
 152                 if (next >= 0x20 && next < 0x7f) simple:
 153                     str << *value;
 154                 else {
 155                     unsigned levels(1);
 156                     if ((next & 0x80) != 0)
 157                         while ((next & 0x80 >> ++levels) != 0);
 158
 159                     unsigned point(next & 0xff >> levels);
 160                     while (--levels != 0)
 161                         point = point << 6 | uint8_t(*++value) & 0x3f;
 162
 163                     if (point < 0x100)
 164                         str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << point;
 165                     else if (point < 0x10000)
 166                         str << "\\u" << std::setbase(16) << std::setw(4) << std::setfill('0') << point;
 167                     else {
 168                         point -= 0x10000;
 169                         str << "\\u" << std::setbase(16) << std::setw(4) << std::setfill('0') << (0xd800 | point >> 0x0a);
 170                         str << "\\u" << std::setbase(16) << std::setw(4) << std::setfill('0') << (0xdc00 | point & 0x3ff);
 171                     }
 172                 }
 173         }
 174
 175     str << (single ? '\'' : '"');
 176 }
 177
 178 void CYNumerify(std::ostringstream &str, double value) {
 179     char string[32];
 180     // XXX: I want this to print 1e3 rather than 1000
 181     sprintf(string, "%.17g", value);
 182     str << string;
 183 }
 184
 185 bool CYIsKey(CYUTF8String value) {
 186     const char *data(value.data);
 187     size_t size(value.size);
 188
 189     if (size == 0)
 190         return false;
 191
 192     if (DigitRange_[data[0]]) {
 193         size_t index(CYGetIndex(value));
 194         if (index == _not(size_t))
 195             return false;
 196     } else {
 197         if (!WordStartRange_[data[0]])
 198             return false;
 199         for (size_t i(1); i != size; ++i)
 200             if (!WordEndRange_[data[i]])
 201                 return false;
 202     }
 203
 204     return true;
 205 }
 206 /* }}} */
 207
 208 double CYCastDouble(const char *value, size_t size) {
 209     char *end;
 210     double number(strtod(value, &end));
 211     if (end != value + size)
 212         return NAN;
 213     return number;
 214 }
 215
 216 double CYCastDouble(const char *value) {
 217     return CYCastDouble(value, strlen(value));
 218 }
 219
 220 CYUTF8String CYPoolCode(CYPool &pool, std::istream &stream) {
 221     CYLocalPool local;
 222     CYDriver driver(local, stream);
 223
 224     cy::parser parser(driver);
 225     _assert(parser.parse() == 0);
 226     _assert(driver.errors_.empty());
 227
 228     CYOptions options;
 229     CYContext context(options);
 230     driver.script_->Replace(context);
 231
 232     std::stringbuf str;
 233     CYOutput out(str, options);
 234     out << *driver.script_;
 235     return $pool.strdup(str.str().c_str());
 236 }
 237
 238 CYPool &CYGetGlobalPool() {
 239     static CYPool pool;
 240     return pool;
 241 }
 242
 243 _visible void CYThrow(const char *format, ...) {
 244     va_list args;
 245     va_start(args, format);
 246     throw CYPoolError(format, args);
 247     // XXX: does this matter? :(
 248     va_end(args);
 249 }
 250
 251 const char *CYPoolError::PoolCString(CYPool &pool) const {
 252     return pool.strdup(message_);
 253 }
 254
 255 CYPoolError::CYPoolError(const CYPoolError &rhs) :
 256     message_(pool_.strdup(rhs.message_))
 257 {
 258 }
 259
 260 CYPoolError::CYPoolError(const char *format, ...) {
 261     va_list args;
 262     va_start(args, format);
 263     // XXX: there might be a beter way to think about this
 264     message_ = pool_.vsprintf(64, format, args);
 265     va_end(args);
 266 }
 267
 268 CYPoolError::CYPoolError(const char *format, va_list args) {
 269     // XXX: there might be a beter way to think about this
 270     message_ = pool_.vsprintf(64, format, args);
 271 }