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    1: /*
    2: ** Copyright (c) 2001-2007 Expat maintainers.
    3: **
    4: ** Permission is hereby granted, free of charge, to any person obtaining
    5: ** a copy of this software and associated documentation files (the
    6: ** "Software"), to deal in the Software without restriction, including
    7: ** without limitation the rights to use, copy, modify, merge, publish,
    8: ** distribute, sublicense, and/or sell copies of the Software, and to
    9: ** permit persons to whom the Software is furnished to do so, subject to
   10: ** the following conditions:
   11: ** 
   12: ** The above copyright notice and this permission notice shall be included
   13: ** in all copies or substantial portions of the Software.
   14: ** 
   15: ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   16: ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   17: ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   18: ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
   19: ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
   20: ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
   21: ** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   22: */
   23: 
   24: #include <stdlib.h>
   25: #include <exec/memory.h>
   26: #include <proto/exec.h>
   27: #include <proto/utility.h>
   28: 
   29: void * malloc (size_t len)
   30: {
   31: 	uint32 size = sizeof(uint32) + len;
   32: 
   33: 	uint32 *mem = AllocMem(size, MEMF_SHARED);
   34: 	if ( mem != 0 )  {
   35: 		*mem = size;
   36: 		++mem;
   37: 	}
   38: 
   39: 	return mem;
   40: }
   41: 
   42: 
   43: void * realloc (void * mem, size_t len2)
   44: {
   45: 	if ( mem == 0 )  {
   46: 		return malloc(len2);
   47: 	}
   48: 
   49: 	if ( len2 == 0 )  {
   50: 		free(mem);
   51: 		return 0;
   52: 	}
   53: 
   54: 	void * new_mem = malloc(len2);
   55: 	if ( new_mem == 0 )  {
   56: 		return 0;
   57: 	}
   58: 
   59: 	uint32 mem_size = *(((uint32*)mem) - 1);
   60: 	CopyMem(mem, new_mem, mem_size);
   61: 	free(mem);
   62: 
   63: 	return new_mem;
   64: }
   65: 
   66: 
   67: void free (void * mem)
   68: {
   69: 	if ( mem != 0 )  {
   70: 		uint32 * size_ptr = ((uint32*)mem) - 1;
   71: 		FreeMem(size_ptr, *size_ptr);
   72: 	}
   73: }
   74: 
   75: 
   76: int memcmp (const void * a, const void * b, size_t len)
   77: {
   78: 	size_t i;
   79: 	int diff;
   80: 
   81: 	for ( i = 0; i < len; ++i )  {
   82: 		diff = *((uint8 *)a++) - *((uint8 *)b++);
   83: 		if ( diff )  {
   84: 			return diff;
   85: 		}
   86: 	}
   87: 
   88: 	return 0;
   89: }
   90: 
   91: 
   92: void * memcpy (void * t, const void * a, size_t len)
   93: {
   94: 	CopyMem((APTR)a, t, len);
   95: 	return t;
   96: }
   97: 
   98: 
   99: void * memmove (void * t1, const void * t2, size_t len)
  100: {
  101: 	MoveMem((APTR)t2, t1, len);
  102: 	return t1;
  103: }
  104: 
  105: 
  106: void * memset (void * t, int c, size_t len)
  107: {
  108: 	return SetMem(t, c, len);
  109: }