Exception.hpp

   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 #ifndef CYCRIPT_EXCEPTION_HPP
  23 #define CYCRIPT_EXCEPTION_HPP
  24
  25 #ifdef CY_EXECUTE
  26 #include <JavaScriptCore/JSBase.h>
  27 #endif
  28
  29 #include "Standard.hpp"
  30
  31 class CYPool;
  32
  33 struct CYException {
  34     virtual ~CYException() {
  35     }
  36
  37     virtual const char *PoolCString(CYPool &pool) const = 0;
  38 #ifdef CY_EXECUTE
  39     virtual JSValueRef CastJSValue(JSContextRef context) const = 0;
  40 #endif
  41 };
  42
  43 void CYThrow(const char *format, ...) _noreturn;
  44
  45 #ifdef CY_EXECUTE
  46 void CYThrow(JSContextRef context, JSValueRef value);
  47 #endif
  48
  49 #define CYTry \
  50     try
  51 #define CYCatch(value) \
  52     catch (const CYException &error) { \
  53         *exception = error.CastJSValue(context); \
  54         return value; \
  55     } catch (...) { \
  56         *exception = CYCastJSValue(context, "catch(...)"); \
  57         return value; \
  58     }
  59
  60 // XXX: fix this: _ is not safe; this is /not/ Menes ;P
  61 #undef _assert
  62 #define _assert(test, args...) do { \
  63     if (!(test)) \
  64         CYThrow("*** _assert(%s):%s(%u):%s [errno=%d]", #test, __FILE__, __LINE__, __FUNCTION__, errno); \
  65 } while (false)
  66
  67 #define _trace() do { \
  68     fprintf(stderr, "_trace():%u\n", __LINE__); \
  69 } while (false)
  70
  71 #define _syscall(expr) ({ \
  72     __typeof__(expr) _value; \
  73     do if ((long) (_value = (expr)) != -1) \
  74         break; \
  75     else switch (errno) { \
  76         case EINTR: \
  77             continue; \
  78         default: \
  79             _assert(false); \
  80     } while (true); \
  81     _value; \
  82 })
  83
  84 #define _aprcall(expr) \
  85     do { \
  86         apr_status_t _aprstatus((expr)); \
  87         _assert(_aprstatus == APR_SUCCESS); \
  88     } while (false)
  89
  90 #define _krncall(expr) \
  91     do { \
  92         kern_return_t _krnstatus((expr)); \
  93         _assert(_krnstatus == KERN_SUCCESS); \
  94     } while (false)
  95
  96 #define _sqlcall(expr) ({ \
  97     __typeof__(expr) _value = (expr); \
  98     if (_value != 0 && (_value < 100 || _value >= 200)) \
  99         _assert(false, "_sqlcall(%u:%s): %s\n", _value, #expr, sqlite3_errmsg(database_)); \
 100     _value; \
 101 })
 102
 103 #endif/*CYCRIPT_ERROR_HPP*/