Library.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2013  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cycript.  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 (*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             default:
 145                 // this test is designed to be "awesome", generating neither warnings nor incorrect results
 146                 if (*value < 0x20 || *value >= 0x7f)
 147                     str << "\\x" << std::setbase(16) << std::setw(2) << std::setfill('0') << unsigned(uint8_t(*value));
 148                 else simple:
 149                     str << *value;
 150         }
 151
 152     str << (single ? '\'' : '"');
 153 }
 154
 155 void CYNumerify(std::ostringstream &str, double value) {
 156     char string[32];
 157     // XXX: I want this to print 1e3 rather than 1000
 158     sprintf(string, "%.17g", value);
 159     str << string;
 160 }
 161
 162 bool CYIsKey(CYUTF8String value) {
 163     const char *data(value.data);
 164     size_t size(value.size);
 165
 166     if (size == 0)
 167         return false;
 168
 169     if (DigitRange_[data[0]]) {
 170         size_t index(CYGetIndex(value));
 171         if (index == _not(size_t))
 172             return false;
 173     } else {
 174         if (!WordStartRange_[data[0]])
 175             return false;
 176         for (size_t i(1); i != size; ++i)
 177             if (!WordEndRange_[data[i]])
 178                 return false;
 179     }
 180
 181     return true;
 182 }
 183 /* }}} */
 184
 185 double CYCastDouble(const char *value, size_t size) {
 186     char *end;
 187     double number(strtod(value, &end));
 188     if (end != value + size)
 189         return NAN;
 190     return number;
 191 }
 192
 193 double CYCastDouble(const char *value) {
 194     return CYCastDouble(value, strlen(value));
 195 }
 196
 197 CYUTF8String CYPoolCode(CYPool &pool, std::istream &stream) {
 198     CYLocalPool local;
 199     CYDriver driver(stream);
 200
 201     cy::parser parser(driver);
 202     _assert(parser.parse() == 0);
 203     _assert(driver.errors_.empty());
 204
 205     CYOptions options;
 206     CYContext context(options);
 207     driver.program_->Replace(context);
 208
 209     std::ostringstream str;
 210     CYOutput out(str, options);
 211     out << *driver.program_;
 212     return $pool.strdup(str.str().c_str());
 213 }
 214
 215 CYPool &CYGetGlobalPool() {
 216     static CYPool pool;
 217     return pool;
 218 }
 219
 220 void CYThrow(const char *format, ...) {
 221     va_list args;
 222     va_start(args, format);
 223     throw CYPoolError(format, args);
 224     // XXX: does this matter? :(
 225     va_end(args);
 226 }
 227
 228 const char *CYPoolError::PoolCString(CYPool &pool) const {
 229     return pool.strdup(message_);
 230 }
 231
 232 CYPoolError::CYPoolError(const CYPoolError &rhs) :
 233     message_(pool_.strdup(rhs.message_))
 234 {
 235 }
 236
 237 CYPoolError::CYPoolError(const char *format, ...) {
 238     va_list args;
 239     va_start(args, format);
 240     // XXX: there might be a beter way to think about this
 241     message_ = pool_.vsprintf(64, format, args);
 242     va_end(args);
 243 }
 244
 245 CYPoolError::CYPoolError(const char *format, va_list args) {
 246     // XXX: there might be a beter way to think about this
 247     message_ = pool_.vsprintf(64, format, args);
 248 }