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 "cycript.hpp"
  23
  24 #include <iostream>
  25 #include <set>
  26 #include <map>
  27 #include <iomanip>
  28 #include <sstream>
  29 #include <cmath>
  30
  31 #include <dlfcn.h>
  32
  33 #include <sys/mman.h>
  34
  35 #include "ConvertUTF.h"
  36 #include "Driver.hpp"
  37 #include "Error.hpp"
  38 #include "Execute.hpp"
  39 #include "Pooling.hpp"
  40 #include "String.hpp"
  41 #include "Syntax.hpp"
  42
  43 template <>
  44 ::pthread_key_t CYLocal<CYPool>::key_ = Key_();
  45
  46 /* C Strings {{{ */
  47 CYUTF8String CYPoolUTF8String(CYPool &pool, CYUTF16String utf16) {
  48     // XXX: this is wrong
  49     size_t size(utf16.size * 5);
  50     char *temp(new(pool) char[size]);
  51
  52     const uint16_t *lhs(utf16.data);
  53     uint8_t *rhs(reinterpret_cast<uint8_t *>(temp));
  54     _assert(ConvertUTF16toUTF8(&lhs, lhs + utf16.size, &rhs, rhs + size, lenientConversion) == conversionOK);
  55
  56     *rhs = 0;
  57     return CYUTF8String(temp, reinterpret_cast<char *>(rhs) - temp);
  58 }
  59
  60 CYUTF16String CYPoolUTF16String(CYPool &pool, CYUTF8String utf8) {
  61     // XXX: this is wrong
  62     size_t size(utf8.size * 5);
  63     uint16_t *temp(new (pool) uint16_t[size]);
  64
  65     const uint8_t *lhs(reinterpret_cast<const uint8_t *>(utf8.data));
  66     uint16_t *rhs(temp);
  67     _assert(ConvertUTF8toUTF16(&lhs, lhs + utf8.size, &rhs, rhs + size, lenientConversion) == conversionOK);
  68
  69     *rhs = 0;
  70     return CYUTF16String(temp, rhs - temp);
  71 }
  72 /* }}} */
  73 /* Index Offsets {{{ */
  74 size_t CYGetIndex(const CYUTF8String &value) {
  75     if (value.data[0] != '0') {
  76         size_t index(0);
  77         for (size_t i(0); i != value.size; ++i) {
  78             if (!DigitRange_[value.data[i]])
  79                 return _not(size_t);
  80             index *= 10;
  81             index += value.data[i] - '0';
  82         }
  83         return index;
  84     } else if (value.size == 1)
  85         return 0;
  86     else
  87         return _not(size_t);
  88 }
  89
  90 // XXX: this isn't actually right
  91 bool CYGetOffset(const char *value, ssize_t &index) {
  92     if (value[0] != '0') {
  93         char *end;
  94         index = strtol(value, &end, 10);
  95         if (value + strlen(value) == end)
  96             return true;
  97     } else if (value[1] == '\0') {
  98         index = 0;
  99         return true;
 100     }
 101
 102     return false;
 103 }
 104 /* }}} */
 105 /* JavaScript *ify {{{ */
 106 void CYStringify(std::ostringstream &str, const char *data, size_t size) {
 107     unsigned quot(0), apos(0);
 108     for (const char *value(data), *end(data + size); value != end; ++value)
 109         if (*value == '"')
 110             ++quot;
 111         else if (*value == '\'')
 112             ++apos;
 113
 114     bool single(quot > apos);
 115
 116     str << (single ? '\'' : '"');
 117
 118     for (const char *value(data), *end(data + size); value != end; ++value)
 119         switch (uint8_t next = *value) {
 120             case '\\': str << "\\\\"; break;
 121             case '\b': str << "\\b"; break;
 122             case '\f': str << "\\f"; break;
 123             case '\n': str << "\\n"; break;
 124             case '\r': str << "\\r"; break;
 125             case '\t': str << "\\t"; break;
 126             case '\v': str << "\\v"; break;
 127
 128             case '"':
 129                 if (!single)
 130                     str << "\\\"";
 131                 else goto simple;
 132             break;
 133
 134             case '\'':
 135                 if (single)
 136                     str << "\\'";
 137                 else goto simple;
 138             break;
 139
 140             case '\0':
 141                 if (value[1] >= '0' && value[1] <= '9')
 142                     str << "\\x00";
 143                 else
 144                     str << "\\0";
 145             break;
 146
 147             default:
 148                 if (next >= 0x20 && next < 0x7f) simple:
 149                     str << *value;
 150                 else {
 151                     unsigned levels(1);
 152                     if ((next & 0x80) != 0)
 153                         while ((next & 0x80 >> ++levels) != 0);
 154
 155                     unsigned point(next & 0xff >> levels);
 156                     while (--levels != 0)
 157                         point = point << 6 | uint8_t(*++value) & 0x3f;
 158
 159                     if (point < 0x100)
 160                         str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << point;
 161                     else if (point < 0x10000)
 162                         str << "\\u" << std::setbase(16) << std::setw(4) << std::setfill('0') << point;
 163                     else {
 164                         point -= 0x10000;
 165                         str << "\\u" << std::setbase(16) << std::setw(4) << std::setfill('0') << (0xd800 | point >> 0x0a);
 166                         str << "\\u" << std::setbase(16) << std::setw(4) << std::setfill('0') << (0xdc00 | point & 0x3ff);
 167                     }
 168                 }
 169         }
 170
 171     str << (single ? '\'' : '"');
 172 }
 173
 174 void CYNumerify(std::ostringstream &str, double value) {
 175     if (std::isinf(value)) {
 176         if (value < 0)
 177             str << '-';
 178         str << "Infinity";
 179         return;
 180     }
 181
 182     char string[32];
 183     // XXX: I want this to print 1e3 rather than 1000
 184     sprintf(string, "%.17g", value);
 185     str << string;
 186 }
 187
 188 bool CYIsKey(CYUTF8String value) {
 189     const char *data(value.data);
 190     size_t size(value.size);
 191
 192     if (size == 0)
 193         return false;
 194
 195     if (DigitRange_[data[0]]) {
 196         size_t index(CYGetIndex(value));
 197         if (index == _not(size_t))
 198             return false;
 199     } else {
 200         if (!WordStartRange_[data[0]])
 201             return false;
 202         for (size_t i(1); i != size; ++i)
 203             if (!WordEndRange_[data[i]])
 204                 return false;
 205     }
 206
 207     return true;
 208 }
 209 /* }}} */
 210
 211 double CYCastDouble(const char *value, size_t size) {
 212     char *end;
 213     double number(strtod(value, &end));
 214     if (end != value + size)
 215         return NAN;
 216     return number;
 217 }
 218
 219 double CYCastDouble(const char *value) {
 220     return CYCastDouble(value, strlen(value));
 221 }
 222
 223 _visible bool CYStartsWith(const CYUTF8String &haystack, const CYUTF8String &needle) {
 224     return haystack.size >= needle.size && strncmp(haystack.data, needle.data, needle.size) == 0;
 225 }
 226
 227 CYUTF8String CYPoolCode(CYPool &pool, std::istream &stream) {
 228     CYLocalPool local;
 229     CYDriver driver(local, stream);
 230     _assert(!driver.Parse());
 231     _assert(driver.errors_.empty());
 232
 233     CYOptions options;
 234     CYContext context(options);
 235     driver.script_->Replace(context);
 236
 237     std::stringbuf str;
 238     CYOutput out(str, options);
 239     out << *driver.script_;
 240     return $pool.strdup(str.str().c_str());
 241 }
 242
 243 CYPool &CYGetGlobalPool() {
 244     static CYPool pool;
 245     return pool;
 246 }
 247
 248 _visible void CYThrow(const char *format, ...) {
 249     va_list args;
 250     va_start(args, format);
 251     throw CYPoolError(format, args);
 252     // XXX: does this matter? :(
 253     va_end(args);
 254 }
 255
 256 const char *CYPoolError::PoolCString(CYPool &pool) const {
 257     return pool.strdup(message_);
 258 }
 259
 260 CYPoolError::CYPoolError(const CYPoolError &rhs) :
 261     message_(pool_.strdup(rhs.message_))
 262 {
 263 }
 264
 265 CYPoolError::CYPoolError(const char *format, ...) {
 266     va_list args;
 267     va_start(args, format);
 268     // XXX: there might be a beter way to think about this
 269     message_ = pool_.vsprintf(64, format, args);
 270     va_end(args);
 271 }
 272
 273 CYPoolError::CYPoolError(const char *format, va_list args) {
 274     // XXX: there might be a beter way to think about this
 275     message_ = pool_.vsprintf(64, format, args);
 276 }