Retro68/libretro/PoorMansDebugging.h

/*
    Copyright 2017 Wolfgang Thaller.

    This file is part of Retro68.

    Retro68 is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Retro68 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 General Public License for more details.

    Under Section 7 of GPL version 3, you are granted additional
    permissions described in the GCC Runtime Library Exception, version
    3.1, as published by the Free Software Foundation.

    You should have received a copy of the GNU General Public License and
    a copy of the GCC Runtime Library Exception along with this program;
    see the files COPYING and COPYING.RUNTIME respectively.  If not, see
    <http://www.gnu.org/licenses/>.
*/

#define ENABLE_ASSERT 1
#define ENABLE_LOG 0

/* a simple version of assert - on failure, the line number is output
 * using DebugStr. 
 
 * It is implimented as a dependency-free macro so it can be used in the
 * earliest stages of program startup.
 */


#if !ENABLE_ASSERT
#define assert(x) do { } while(0)
#else
#define assert(x) do { \
        if(!(x)) {\
            unsigned char str[6];    \
            int i;    \
            int l = __LINE__; \
            for(i = 1; i < 6; i++)    \
                str[i] = ' ';    \
            str[0] = 5;    \
            str[5] = '0';    \
            for(i = 5; l && i > 0; i--)    \
            {    \
                str[i] = '0' + (l % 10);    \
                l /= 10;    \
            }    \
            DebugStr(str);    \
        }    \
    } while(0)
#endif

#if !ENABLE_LOG
#define log(x) do { } while(0)
#else
#define log(x) do { \
        {\
            unsigned char str[10];    \
            int ___i;    \
            unsigned l = (x); \
            for(___i = 2; ___i < 10; ___i++)    \
                str[___i] = ' ';    \
            str[0] = 9;    \
            str[1] = 'L';    \
            str[9] = '0';    \
            for(___i = 8; l && ___i > 1; ___i--)    \
            {    \
                str[___i] = '0' + (l & 0xF);    \
                if((l & 0xF) >= 0xA) \
                    str[___i] = 'A' - 10 + (l&0xF); \
                l >>= 4;    \
            }    \
            DebugStr(str);    \
        }    \
    } while(0)

#endif