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Annotation of embedaddon/expat/amiga/stdlib.c, revision 1.1.1.1

1.1       misho       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: }