swapmem.c

/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include "srxfixup_internal.h"
 
#if defined(__has_include)
#if __has_include(<endian.h>)
// NOLINTNEXTLINE(misc-include-cleaner)
#include <endian.h>
#if _BYTE_ORDER != _LITTLE_ENDIAN
#define SWAPMEM_IS_NOT_BIG_ENDIAN
#endif
#endif
#endif
 
#ifdef SWAPMEM_IS_NOT_BIG_ENDIAN
#include <stdint.h>
#include <string.h>
#endif
 
void swapmemory(void *aaddr, const char *format, unsigned int times)
{
#ifdef SWAPMEM_IS_NOT_BIG_ENDIAN
    unsigned int i;
    size_t j;
    void *aaddr_cur;
    size_t format_len;
 
    format_len = strlen(format);
 
    aaddr_cur = aaddr;
    for ( i = 0; i < times; i += 1 )
    {
        for ( j = 0; j < format_len; j += 1 )
        {
            switch ( format[j] )
            {
                case 'c':
                    aaddr_cur = (void *)(((uint8_t *)aaddr_cur) + 1);
                    break;
                case 's':
                    *(uint16_t *)aaddr_cur = bswap16(*(uint16_t *)aaddr_cur);
                    aaddr_cur = (void *)(((uint8_t *)aaddr_cur) + 2);
                    break;
                case 'l':
                    *(uint32_t *)aaddr_cur = bswap32(*(uint32_t *)aaddr_cur);
                    aaddr_cur = (void *)(((uint8_t *)aaddr_cur) + 4);
                    break;
                default:
                    break;
            }
        }
    }
#else
    (void)aaddr;
    (void)format;
    (void)times;
#endif
}